Merge pull request #498 from telemt/bump

Update Cargo.toml
2026-06-19 01:11:09 +03:00 · 2026-03-19 18:25:14 +03:00 · 2026-03-19 18:24:01 +03:00 · 2026-03-19 18:23:38 +03:00 · 2026-03-19 17:45:17 +03:00 · 2026-03-19 17:32:49 +03:00
73 changed files with 5514 additions and 21184 deletions
@@ -1,15 +0,0 @@
-[bans]
-multiple-versions = "deny"
-wildcards = "allow"
-highlight = "all"
-
-# Explicitly flag the weak cryptography so the agent is forced to justify its existence
-[[bans.skip]]
-name = "md-5"
-version = "*"
-reason = "MUST VERIFY: Only allowed for legacy checksums, never for security."
-
-[[bans.skip]]
-name = "sha1"
-version = "*"
-reason = "MUST VERIFY: Only allowed for backwards compatibility."
@@ -21,4 +21,3 @@ target
 #.idea/

 proxy-secret
-coverage-html/
@@ -5,22 +5,6 @@ Your responses are precise, minimal, and architecturally sound. You are working

 ---

-### Context: The Telemt Project
-
-You are working on **Telemt**, a high-performance, production-grade Telegram MTProxy implementation written in Rust. It is explicitly designed to operate in highly hostile network environments and evade advanced network censorship.
-
-**Adversarial Threat Model:**
-The proxy operates under constant surveillance by DPI (Deep Packet Inspection) systems and active scanners (state firewalls, mobile operator fraud controls). These entities actively probe IPs, analyze protocol handshakes, and look for known proxy signatures to block or throttle traffic.
-
-**Core Architectural Pillars:**
-1. **TLS-Fronting (TLS-F) & TCP-Splitting (TCP-S):** To the outside world, Telemt looks like a standard TLS server. If a client presents a valid MTProxy key, the connection is handled internally. If a censor's scanner, web browser, or unauthorized crawler connects, Telemt seamlessly splices the TCP connection (L4) to a real, legitimate HTTPS fallback server (e.g., Nginx) without modifying the `ClientHello` or terminating the TLS handshake.
-2. **Middle-End (ME) Orchestration:** A highly concurrent, generation-based pool managing upstream connections to Telegram Datacenters (DCs). It utilizes an **Adaptive Floor** (dynamically scaling writer connections based on traffic), **Hardswaps** (zero-downtime pool reconfiguration), and **STUN/NAT** reflection mechanisms. 
-3. **Strict KDF Routing:** Cryptographic Key Derivation Functions (KDF) in this protocol strictly rely on the exact pairing of Source IP/Port and Destination IP/Port. Deviations or missing port logic will silently break the MTProto handshake.
-4. **Data Plane vs. Control Plane Isolation:** The Data Plane (readers, writers, payload relay, TCP splicing) must remain strictly non-blocking, zero-allocation in hot paths, and highly resilient to network backpressure. The Control Plane (API, metrics, pool generation swaps, config reloads) orchestrates the state asynchronously without stalling the Data Plane.
-
-Any modification you make must preserve Telemt's invisibility to censors, its strict memory-safety invariants, and its hot-path throughput.
-
-
 ### 0. Priority Resolution — Scope Control

 This section resolves conflicts between code quality enforcement and scope limitation.
@@ -390,12 +374,6 @@ you MUST explain why existing invariants remain valid.
 - Do not modify existing tests unless the task explicitly requires it.
 - Do not weaken assertions.
 - Preserve determinism in testable components.
- Bug-first forces the discipline of proving you understand a bug before you fix it. Tests written after a fix almost always pass trivially and catch nothing new.
- Invariants over scenarios is the core shift. The route_mode table alone would have caught both BUG-1 and BUG-2 before they were written — "snapshot equals watch state after any transition burst" is a two-line property test that fails immediately on the current diverged-atomics code.
- Differential/model catches logic drift over time.
- Scheduler pressure is specifically aimed at the concurrent state bugs that keep reappearing. A single-threaded happy-path test of set_mode will never find subtle bugs; 10,000 concurrent calls will find it on the first run.
- Mutation gate answers your original complaint directly. It measures test power. If you can remove a bounds check and nothing breaks, the suite isn't covering that branch yet — it just says so explicitly.
- Dead parameter is a code smell rule. 

 ### 15. Security Constraints

@@ -0,0 +1,208 @@
+# Code of Conduct
+
+## 1. Purpose
+
+Telemt exists to solve technical problems.
+
+Telemt is open to contributors who want to learn, improve and build meaningful systems together.
+
+It is a place for building, testing, reasoning, documenting, and improving systems.
+
+Discussions that advance this work are in scope. Discussions that divert it are not.
+
+Technology has consequences. Responsibility is inherent.
+
+> **Zweck bestimmt die Form.**
+
+> Purpose defines form.
+
+---
+
+## 2. Principles
+
+* **Technical over emotional**
+  Arguments are grounded in data, logs, reproducible cases, or clear reasoning.
+
+* **Clarity over noise**
+  Communication is structured, concise, and relevant.
+
+* **Openness with standards**
+  Participation is open. The work remains disciplined.
+
+* **Independence of judgment**
+  Claims are evaluated on technical merit, not affiliation or posture.
+
+* **Responsibility over capability**
+  Capability does not justify careless use.
+
+* **Cooperation over friction**
+  Progress depends on coordination, mutual support, and honest review.
+
+* **Good intent, rigorous method**
+  Assume good intent, but require rigor.
+
+> **Aussagen gelten nach ihrer Begründung.**
+
+> Claims are weighed by evidence.
+
+---
+
+## 3. Expected Behavior
+
+Participants are expected to:
+
+* Communicate directly and respectfully
+* Support claims with evidence
+* Stay within technical scope
+* Accept critique and provide it constructively
+* Reduce noise, duplication, and ambiguity
+* Help others reach correct and reproducible outcomes
+* Act in a way that improves the system as a whole
+
+Precision is learned.
+
+New contributors are welcome. They are expected to grow into these standards. Existing contributors are expected to make that growth possible.
+
+> **Wer behauptet, belegt.**
+
+> Whoever claims, proves.
+
+---
+
+## 4. Unacceptable Behavior
+
+The following is not allowed:
+
+* Personal attacks, insults, harassment, or intimidation
+* Repeatedly derailing discussion away from Telemt’s purpose
+* Spam, flooding, or repeated low-quality input
+* Misinformation presented as fact
+* Attempts to degrade, destabilize, or exhaust Telemt or its participants
+* Use of Telemt or its spaces to enable harm
+
+Telemt is not a venue for disputes that displace technical work.
+Such discussions may be closed, removed, or redirected.
+
+> **Störung ist kein Beitrag.**
+
+> Disruption is not contribution.
+
+---
+
+## 5. Security and Misuse
+
+Telemt is intended for responsible use.
+
+* Do not use it to plan, coordinate, or execute harm
+* Do not publish vulnerabilities without responsible disclosure
+* Report security issues privately where possible
+
+Security is both technical and behavioral.
+
+> **Verantwortung endet nicht am Code.**
+
+> Responsibility does not end at the code.
+
+---
+
+## 6. Openness
+
+Telemt is open to contributors of different backgrounds, experience levels, and working styles.
+
+Standards are public, legible, and applied to the work itself.
+
+Questions are welcome. Careful disagreement is welcome. Honest correction is welcome.
+
+Gatekeeping by obscurity, status signaling, or hostility is not.
+
+---
+
+## 7. Scope
+
+This Code of Conduct applies to all official spaces:
+
+* Source repositories (issues, pull requests, discussions)
+* Documentation
+* Communication channels associated with Telemt
+
+---
+
+## 8. Maintainer Stewardship
+
+Maintainers are responsible for final decisions in matters of conduct, scope, and direction.
+
+This responsibility is stewardship: preserving continuity, protecting signal, maintaining standards, and keeping Telemt workable for others.
+
+Judgment should be exercised with restraint, consistency, and institutional responsibility.
+
+Not every decision requires extended debate.
+Not every intervention requires public explanation.
+
+All decisions are expected to serve the durability, clarity, and integrity of Telemt.
+
+> **Ordnung ist Voraussetzung der Funktion.**
+
+> Order is the precondition of function.
+
+---
+
+## 9. Enforcement
+
+Maintainers may act to preserve the integrity of Telemt, including by:
+
+* Removing content
+* Locking discussions
+* Rejecting contributions
+* Restricting or banning participants
+
+Actions are taken to maintain function, continuity, and signal quality.
+
+Where possible, correction is preferred to exclusion.
+
+Where necessary, exclusion is preferred to decay.
+
+---
+
+## 10. Final
+
+Telemt is built on discipline, structure, and shared intent.
+
+Signal over noise.
+Facts over opinion.
+Systems over rhetoric.
+
+Work is collective.
+Outcomes are shared.
+Responsibility is distributed.
+
+Precision is learned.
+Rigor is expected.
+Help is part of the work.
+
+> **Ordnung ist Voraussetzung der Freiheit.**
+
+If you contribute — contribute with care.
+If you speak — speak with substance.
+If you engage — engage constructively.
+
+---
+
+## 11. After All
+
+Systems outlive intentions.
+
+What is built will be used.
+What is released will propagate.
+What is maintained will define the future state.
+
+There is no neutral infrastructure, only infrastructure shaped well or poorly.
+
+> **Jedes System trägt Verantwortung.**
+
+> Every system carries responsibility.
+
+Stability requires discipline.
+Freedom requires structure.
+Trust requires honesty.
+
+In the end, the system reflects its contributors.
@@ -425,32 +425,6 @@ dependencies = [
 "cipher",
 ]

-[[package]]
-name = "curve25519-dalek"
-version = "4.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97fb8b7c4503de7d6ae7b42ab72a5a59857b4c937ec27a3d4539dba95b5ab2be"
-dependencies = [
- "cfg-if",
- "cpufeatures",
- "curve25519-dalek-derive",
- "fiat-crypto",
- "rustc_version",
- "subtle",
- "zeroize",
-]
-
-[[package]]
-name = "curve25519-dalek-derive"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.114",
-]
-
 [[package]]
 name = "dashmap"
 version = "5.5.3"
@@ -543,12 +517,6 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"

-[[package]]
-name = "fiat-crypto"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
-
 [[package]]
 name = "filetime"
 version = "0.2.27"
@@ -1641,7 +1609,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
 dependencies = [
 "rand_chacha",
- "rand_core 0.9.5",
+ "rand_core",
 ]

 [[package]]
@@ -1651,15 +1619,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
 "ppv-lite86",
- "rand_core 0.9.5",
+ "rand_core",
 ]

-[[package]]
-name = "rand_core"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
-
 [[package]]
 name = "rand_core"
 version = "0.9.5"
@@ -1675,7 +1637,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "513962919efc330f829edb2535844d1b912b0fbe2ca165d613e4e8788bb05a5a"
 dependencies = [
- "rand_core 0.9.5",
+ "rand_core",
 ]

 [[package]]
@@ -2063,12 +2025,6 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"

-[[package]]
-name = "static_assertions"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
-
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -2131,7 +2087,7 @@ dependencies = [

 [[package]]
 name = "telemt"
-version = "3.3.20"
+version = "3.3.19"
 dependencies = [
 "aes",
 "anyhow",
@@ -2171,8 +2127,6 @@ dependencies = [
 "sha1",
 "sha2",
 "socket2 0.5.10",
- "static_assertions",
- "subtle",
 "thiserror 2.0.18",
 "tokio",
 "tokio-rustls",
@@ -2183,7 +2137,6 @@ dependencies = [
 "tracing-subscriber",
 "url",
 "webpki-roots 0.26.11",
- "x25519-dalek",
 "x509-parser",
 "zeroize",
 ]
@@ -3183,18 +3136,6 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"

-[[package]]
-name = "x25519-dalek"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7e468321c81fb07fa7f4c636c3972b9100f0346e5b6a9f2bd0603a52f7ed277"
-dependencies = [
- "curve25519-dalek",
- "rand_core 0.6.4",
- "serde",
- "zeroize",
-]
-
 [[package]]
 name = "x509-parser"
 version = "0.15.1"
@@ -1,6 +1,6 @@
 [package]
 name = "telemt"
-version = "3.3.20"
+version = "3.3.25"
 edition = "2024"

 [dependencies]
@@ -22,8 +22,6 @@ hmac = "0.12"
 crc32fast = "1.4"
 crc32c = "0.6"
 zeroize = { version = "1.8", features = ["derive"] }
-subtle = "2.6"
-static_assertions = "1.1"

 # Network
 socket2 = { version = "0.5", features = ["all"] }
@@ -52,7 +50,6 @@ regex = "1.11"
 crossbeam-queue = "0.3"
 num-bigint = "0.4"
 num-traits = "0.2"
-x25519-dalek = "2"
 anyhow = "1.0"

 # HTTP
@@ -38,6 +38,7 @@ USER telemt

 EXPOSE 443
 EXPOSE 9090
+EXPOSE 9091

 ENTRYPOINT ["/app/telemt"]
 CMD ["config.toml"]
@@ -38,7 +38,7 @@ port = 443
 [server.api]
 enabled = true
 listen = "0.0.0.0:9091"
-whitelist = ["127.0.0.0/8", "172.16.0.0/12"]
+whitelist = ["127.0.0.0/8"]
 minimal_runtime_enabled = false
 minimal_runtime_cache_ttl_ms = 1000

@@ -6,8 +6,8 @@ services:
    restart: unless-stopped
    ports:
      - "443:443"
-      - "127.0.0.1:9090:9090"   # Metrics
-      - "127.0.0.1:9091:9091"   # API
+      - "127.0.0.1:9090:9090"
+      - "127.0.0.1:9091:9091"
    # Allow caching 'proxy-secret' in read-only container
    working_dir: /run/telemt
    volumes:
@@ -29,8 +29,3 @@ services:
      nofile:
        soft: 65536
        hard: 65536
-    logging:
-      driver: "json-file"
-      options:
-        max-size: "10m"
-        max-file: "3"
@@ -0,0 +1,294 @@
+# Telemt Config Parameters Reference
+
+This document lists all configuration keys accepted by `config.toml`.
+
+> [!WARNING]
+> 
+> The configuration parameters detailed in this document are intended for advanced users and fine-tuning purposes. Modifying these settings without a clear understanding of their function may lead to application instability or other unexpected behavior. Please proceed with caution and at your own risk.
+
+## Top-level keys
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| include | `String` (special directive) | `null` | — | Includes another TOML file with `include = "relative/or/absolute/path.toml"`; includes are processed recursively before parsing. |
+| show_link | `"*" \| String[]` | `[]` (`ShowLink::None`) | — | Legacy top-level link visibility selector (`"*"` for all users or explicit usernames list). |
+| dc_overrides | `Map<String, String[]>` | `{}` | — | Overrides DC endpoints for non-standard DCs; key is DC id string, value is `ip:port` list. |
+| default_dc | `u8 \| null` | `null` (effective fallback: `2` in ME routing) | — | Default DC index used for unmapped non-standard DCs. |
+
+## [general]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| data_path | `String \| null` | `null` | — | Optional runtime data directory path. |
+| prefer_ipv6 | `bool` | `false` | — | Prefer IPv6 where applicable in runtime logic. |
+| fast_mode | `bool` | `true` | — | Enables fast-path optimizations for traffic processing. |
+| use_middle_proxy | `bool` | `true` | none | Enables ME transport mode; if `false`, runtime falls back to direct DC routing. |
+| proxy_secret_path | `String \| null` | `"proxy-secret"` | Path may be `null`. | Path to Telegram infrastructure proxy-secret file used by ME handshake logic. |
+| proxy_config_v4_cache_path | `String \| null` | `"cache/proxy-config-v4.txt"` | — | Optional cache path for raw `getProxyConfig` (IPv4) snapshot. |
+| proxy_config_v6_cache_path | `String \| null` | `"cache/proxy-config-v6.txt"` | — | Optional cache path for raw `getProxyConfigV6` (IPv6) snapshot. |
+| ad_tag | `String \| null` | `null` | — | Global fallback ad tag (32 hex characters). |
+| middle_proxy_nat_ip | `IpAddr \| null` | `null` | Must be a valid IP when set. | Manual public NAT IP override used as ME address material when set. |
+| middle_proxy_nat_probe | `bool` | `true` | Auto-forced to `true` when `use_middle_proxy = true`. | Enables ME NAT probing; runtime may force it on when ME mode is active. |
+| middle_proxy_nat_stun | `String \| null` | `null` | Deprecated. Use `network.stun_servers`. | Deprecated legacy single STUN server for NAT probing. |
+| middle_proxy_nat_stun_servers | `String[]` | `[]` | Deprecated. Use `network.stun_servers`. | Deprecated legacy STUN list for NAT probing fallback. |
+| stun_nat_probe_concurrency | `usize` | `8` | Must be `> 0`. | Maximum number of parallel STUN probes during NAT/public endpoint discovery. |
+| middle_proxy_pool_size | `usize` | `8` | none | Target size of active ME writer pool. |
+| middle_proxy_warm_standby | `usize` | `16` | none | Reserved compatibility field in current runtime revision. |
+| me_init_retry_attempts | `u32` | `0` | `0..=1_000_000`. | Startup retries for ME pool initialization (`0` means unlimited). |
+| me2dc_fallback | `bool` | `true` | — | Allows fallback from ME mode to direct DC when ME startup fails. |
+| me_keepalive_enabled | `bool` | `true` | none | Enables periodic ME keepalive/ping traffic. |
+| me_keepalive_interval_secs | `u64` | `8` | none | Base ME keepalive interval in seconds. |
+| me_keepalive_jitter_secs | `u64` | `2` | none | Keepalive jitter in seconds to reduce synchronized bursts. |
+| me_keepalive_payload_random | `bool` | `true` | none | Randomizes keepalive payload bytes instead of fixed zero payload. |
+| rpc_proxy_req_every | `u64` | `0` | `0` or `10..=300`. | Interval for service `RPC_PROXY_REQ` activity signals (`0` disables). |
+| me_writer_cmd_channel_capacity | `usize` | `4096` | Must be `> 0`. | Capacity of per-writer command channel. |
+| me_route_channel_capacity | `usize` | `768` | Must be `> 0`. | Capacity of per-connection ME response route channel. |
+| me_c2me_channel_capacity | `usize` | `1024` | Must be `> 0`. | Capacity of per-client command queue (client reader -> ME sender). |
+| me_reader_route_data_wait_ms | `u64` | `2` | `0..=20`. | Bounded wait for routing ME DATA to per-connection queue (`0` = no wait). |
+| me_d2c_flush_batch_max_frames | `usize` | `32` | `1..=512`. | Max ME->client frames coalesced before flush. |
+| me_d2c_flush_batch_max_bytes | `usize` | `131072` | `4096..=2_097_152`. | Max ME->client payload bytes coalesced before flush. |
+| me_d2c_flush_batch_max_delay_us | `u64` | `500` | `0..=5000`. | Max microsecond wait for coalescing more ME->client frames (`0` disables timed coalescing). |
+| me_d2c_ack_flush_immediate | `bool` | `true` | — | Flushes client writer immediately after quick-ack write. |
+| direct_relay_copy_buf_c2s_bytes | `usize` | `65536` | `4096..=1_048_576`. | Copy buffer size for client->DC direction in direct relay. |
+| direct_relay_copy_buf_s2c_bytes | `usize` | `262144` | `8192..=2_097_152`. | Copy buffer size for DC->client direction in direct relay. |
+| crypto_pending_buffer | `usize` | `262144` | — | Max pending ciphertext buffer per client writer (bytes). |
+| max_client_frame | `usize` | `16777216` | — | Maximum allowed client MTProto frame size (bytes). |
+| desync_all_full | `bool` | `false` | — | Emits full crypto-desync forensic logs for every event. |
+| beobachten | `bool` | `true` | — | Enables per-IP forensic observation buckets. |
+| beobachten_minutes | `u64` | `10` | Must be `> 0`. | Retention window (minutes) for per-IP observation buckets. |
+| beobachten_flush_secs | `u64` | `15` | Must be `> 0`. | Snapshot flush interval (seconds) for observation output file. |
+| beobachten_file | `String` | `"cache/beobachten.txt"` | — | Observation snapshot output file path. |
+| hardswap | `bool` | `true` | none | Enables generation-based ME hardswap strategy. |
+| me_warmup_stagger_enabled | `bool` | `true` | none | Staggers extra ME warmup dials to avoid connection spikes. |
+| me_warmup_step_delay_ms | `u64` | `500` | none | Base delay in milliseconds between warmup dial steps. |
+| me_warmup_step_jitter_ms | `u64` | `300` | none | Additional random delay in milliseconds for warmup steps. |
+| me_reconnect_max_concurrent_per_dc | `u32` | `8` | none | Limits concurrent reconnect workers per DC during health recovery. |
+| me_reconnect_backoff_base_ms | `u64` | `500` | none | Initial reconnect backoff in milliseconds. |
+| me_reconnect_backoff_cap_ms | `u64` | `30000` | none | Maximum reconnect backoff cap in milliseconds. |
+| me_reconnect_fast_retry_count | `u32` | `16` | none | Immediate retry budget before long backoff behavior applies. |
+| me_single_endpoint_shadow_writers | `u8` | `2` | `0..=32`. | Additional reserve writers for one-endpoint DC groups. |
+| me_single_endpoint_outage_mode_enabled | `bool` | `true` | — | Enables aggressive outage recovery for one-endpoint DC groups. |
+| me_single_endpoint_outage_disable_quarantine | `bool` | `true` | — | Ignores endpoint quarantine in one-endpoint outage mode. |
+| me_single_endpoint_outage_backoff_min_ms | `u64` | `250` | Must be `> 0`; also `<= me_single_endpoint_outage_backoff_max_ms`. | Minimum reconnect backoff in outage mode (ms). |
+| me_single_endpoint_outage_backoff_max_ms | `u64` | `3000` | Must be `> 0`; also `>= me_single_endpoint_outage_backoff_min_ms`. | Maximum reconnect backoff in outage mode (ms). |
+| me_single_endpoint_shadow_rotate_every_secs | `u64` | `900` | — | Periodic shadow writer rotation interval (`0` disables). |
+| me_floor_mode | `"static" \| "adaptive"` | `"adaptive"` | — | Writer floor policy mode. |
+| me_adaptive_floor_idle_secs | `u64` | `90` | — | Idle time before adaptive floor may reduce one-endpoint target. |
+| me_adaptive_floor_min_writers_single_endpoint | `u8` | `1` | `1..=32`. | Minimum adaptive writer target for one-endpoint DC groups. |
+| me_adaptive_floor_min_writers_multi_endpoint | `u8` | `1` | `1..=32`. | Minimum adaptive writer target for multi-endpoint DC groups. |
+| me_adaptive_floor_recover_grace_secs | `u64` | `180` | — | Grace period to hold static floor after activity. |
+| me_adaptive_floor_writers_per_core_total | `u16` | `48` | Must be `> 0`. | Global writer budget per logical CPU core in adaptive mode. |
+| me_adaptive_floor_cpu_cores_override | `u16` | `0` | — | Manual CPU core count override (`0` uses auto-detection). |
+| me_adaptive_floor_max_extra_writers_single_per_core | `u16` | `1` | — | Per-core max extra writers above base floor for one-endpoint DCs. |
+| me_adaptive_floor_max_extra_writers_multi_per_core | `u16` | `2` | — | Per-core max extra writers above base floor for multi-endpoint DCs. |
+| me_adaptive_floor_max_active_writers_per_core | `u16` | `64` | Must be `> 0`. | Hard cap for active ME writers per logical CPU core. |
+| me_adaptive_floor_max_warm_writers_per_core | `u16` | `64` | Must be `> 0`. | Hard cap for warm ME writers per logical CPU core. |
+| me_adaptive_floor_max_active_writers_global | `u32` | `256` | Must be `> 0`. | Hard global cap for active ME writers. |
+| me_adaptive_floor_max_warm_writers_global | `u32` | `256` | Must be `> 0`. | Hard global cap for warm ME writers. |
+| upstream_connect_retry_attempts | `u32` | `2` | Must be `> 0`. | Connect attempts for selected upstream before error/fallback. |
+| upstream_connect_retry_backoff_ms | `u64` | `100` | — | Delay between upstream connect attempts (ms). |
+| upstream_connect_budget_ms | `u64` | `3000` | Must be `> 0`. | Total wall-clock budget for one upstream connect request (ms). |
+| upstream_unhealthy_fail_threshold | `u32` | `5` | Must be `> 0`. | Consecutive failed requests before upstream is marked unhealthy. |
+| upstream_connect_failfast_hard_errors | `bool` | `false` | — | Skips additional retries for hard non-transient connect errors. |
+| stun_iface_mismatch_ignore | `bool` | `false` | none | Reserved compatibility flag in current runtime revision. |
+| unknown_dc_log_path | `String \| null` | `"unknown-dc.txt"` | — | File path for unknown-DC request logging (`null` disables file path). |
+| unknown_dc_file_log_enabled | `bool` | `false` | — | Enables unknown-DC file logging. |
+| log_level | `"debug" \| "verbose" \| "normal" \| "silent"` | `"normal"` | — | Runtime logging verbosity. |
+| disable_colors | `bool` | `false` | — | Disables ANSI colors in logs. |
+| me_socks_kdf_policy | `"strict" \| "compat"` | `"strict"` | — | SOCKS-bound KDF fallback policy for ME handshake. |
+| me_route_backpressure_base_timeout_ms | `u64` | `25` | Must be `> 0`. | Base backpressure timeout for route-channel send (ms). |
+| me_route_backpressure_high_timeout_ms | `u64` | `120` | Must be `>= me_route_backpressure_base_timeout_ms`. | High backpressure timeout when queue occupancy exceeds watermark (ms). |
+| me_route_backpressure_high_watermark_pct | `u8` | `80` | `1..=100`. | Queue occupancy threshold (%) for high timeout mode. |
+| me_health_interval_ms_unhealthy | `u64` | `1000` | Must be `> 0`. | Health monitor interval while writer coverage is degraded (ms). |
+| me_health_interval_ms_healthy | `u64` | `3000` | Must be `> 0`. | Health monitor interval while writer coverage is healthy (ms). |
+| me_admission_poll_ms | `u64` | `1000` | Must be `> 0`. | Poll interval for conditional-admission checks (ms). |
+| me_warn_rate_limit_ms | `u64` | `5000` | Must be `> 0`. | Cooldown for repetitive ME warning logs (ms). |
+| me_route_no_writer_mode | `"async_recovery_failfast" \| "inline_recovery_legacy" \| "hybrid_async_persistent"` | `"hybrid_async_persistent"` | — | Route behavior when no writer is immediately available. |
+| me_route_no_writer_wait_ms | `u64` | `250` | `10..=5000`. | Max wait in async-recovery failfast mode (ms). |
+| me_route_inline_recovery_attempts | `u32` | `3` | Must be `> 0`. | Inline recovery attempts in legacy mode. |
+| me_route_inline_recovery_wait_ms | `u64` | `3000` | `10..=30000`. | Max inline recovery wait in legacy mode (ms). |
+| fast_mode_min_tls_record | `usize` | `0` | — | Minimum TLS record size when fast-mode coalescing is enabled (`0` disables). |
+| update_every | `u64 \| null` | `300` | If set: must be `> 0`; if `null`: legacy fallback path is used. | Unified refresh interval for ME config and proxy-secret updater tasks. |
+| me_reinit_every_secs | `u64` | `900` | Must be `> 0`. | Periodic interval for zero-downtime ME reinit cycle. |
+| me_hardswap_warmup_delay_min_ms | `u64` | `1000` | Must be `<= me_hardswap_warmup_delay_max_ms`. | Lower bound for hardswap warmup dial spacing. |
+| me_hardswap_warmup_delay_max_ms | `u64` | `2000` | Must be `> 0`. | Upper bound for hardswap warmup dial spacing. |
+| me_hardswap_warmup_extra_passes | `u8` | `3` | Must be within `[0, 10]`. | Additional warmup passes after the base pass in one hardswap cycle. |
+| me_hardswap_warmup_pass_backoff_base_ms | `u64` | `500` | Must be `> 0`. | Base backoff between extra hardswap warmup passes. |
+| me_config_stable_snapshots | `u8` | `2` | Must be `> 0`. | Number of identical ME config snapshots required before apply. |
+| me_config_apply_cooldown_secs | `u64` | `300` | none | Cooldown between applied ME endpoint-map updates. |
+| me_snapshot_require_http_2xx | `bool` | `true` | — | Requires 2xx HTTP responses for applying config snapshots. |
+| me_snapshot_reject_empty_map | `bool` | `true` | — | Rejects empty config snapshots. |
+| me_snapshot_min_proxy_for_lines | `u32` | `1` | Must be `> 0`. | Minimum parsed `proxy_for` rows required to accept snapshot. |
+| proxy_secret_stable_snapshots | `u8` | `2` | Must be `> 0`. | Number of identical proxy-secret snapshots required before rotation. |
+| proxy_secret_rotate_runtime | `bool` | `true` | none | Enables runtime proxy-secret rotation from updater snapshots. |
+| me_secret_atomic_snapshot | `bool` | `true` | — | Keeps selector and secret bytes from the same snapshot atomically. |
+| proxy_secret_len_max | `usize` | `256` | Must be within `[32, 4096]`. | Upper length limit for accepted proxy-secret bytes. |
+| me_pool_drain_ttl_secs | `u64` | `90` | none | Time window where stale writers remain fallback-eligible after map change. |
+| me_pool_drain_threshold | `u64` | `128` | — | Max draining stale writers before batch force-close (`0` disables threshold cleanup). |
+| me_pool_drain_soft_evict_enabled | `bool` | `true` | — | Enables gradual soft-eviction of stale writers during drain/reinit instead of immediate hard close. |
+| me_pool_drain_soft_evict_grace_secs | `u64` | `30` | `0..=3600`. | Grace period before stale writers become soft-evict candidates. |
+| me_pool_drain_soft_evict_per_writer | `u8` | `1` | `1..=16`. | Maximum stale routes soft-evicted per writer in one eviction pass. |
+| me_pool_drain_soft_evict_budget_per_core | `u16` | `8` | `1..=64`. | Per-core budget limiting aggregate soft-eviction work per pass. |
+| me_pool_drain_soft_evict_cooldown_ms | `u64` | `5000` | Must be `> 0`. | Cooldown between consecutive soft-eviction passes (ms). |
+| me_bind_stale_mode | `"never" \| "ttl" \| "always"` | `"ttl"` | — | Policy for new binds on stale draining writers. |
+| me_bind_stale_ttl_secs | `u64` | `90` | — | TTL for stale bind allowance when stale mode is `ttl`. |
+| me_pool_min_fresh_ratio | `f32` | `0.8` | Must be within `[0.0, 1.0]`. | Minimum fresh desired-DC coverage ratio before stale writers are drained. |
+| me_reinit_drain_timeout_secs | `u64` | `120` | `0` disables force-close; if `> 0` and `< me_pool_drain_ttl_secs`, runtime bumps it to TTL. | Force-close timeout for draining stale writers (`0` keeps indefinite draining). |
+| proxy_secret_auto_reload_secs | `u64` | `3600` | Deprecated. Use `general.update_every`. | Deprecated legacy secret reload interval (fallback when `update_every` is not set). |
+| proxy_config_auto_reload_secs | `u64` | `3600` | Deprecated. Use `general.update_every`. | Deprecated legacy config reload interval (fallback when `update_every` is not set). |
+| me_reinit_singleflight | `bool` | `true` | — | Serializes ME reinit cycles across trigger sources. |
+| me_reinit_trigger_channel | `usize` | `64` | Must be `> 0`. | Trigger queue capacity for reinit scheduler. |
+| me_reinit_coalesce_window_ms | `u64` | `200` | — | Trigger coalescing window before starting reinit (ms). |
+| me_deterministic_writer_sort | `bool` | `true` | — | Enables deterministic candidate sort for writer binding path. |
+| me_writer_pick_mode | `"sorted_rr" \| "p2c"` | `"p2c"` | — | Writer selection mode for route bind path. |
+| me_writer_pick_sample_size | `u8` | `3` | `2..=4`. | Number of candidates sampled by picker in `p2c` mode. |
+| ntp_check | `bool` | `true` | — | Enables NTP drift check at startup. |
+| ntp_servers | `String[]` | `["pool.ntp.org"]` | — | NTP servers used for drift check. |
+| auto_degradation_enabled | `bool` | `true` | none | Reserved compatibility flag in current runtime revision. |
+| degradation_min_unavailable_dc_groups | `u8` | `2` | none | Reserved compatibility threshold in current runtime revision. |
+
+## [general.modes]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| classic | `bool` | `false` | — | Enables classic MTProxy mode. |
+| secure | `bool` | `false` | — | Enables secure mode. |
+| tls | `bool` | `true` | — | Enables TLS mode. |
+
+## [general.links]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| show | `"*" \| String[]` | `"*"` | — | Selects users whose tg:// links are shown at startup. |
+| public_host | `String \| null` | `null` | — | Public hostname/IP override for generated tg:// links. |
+| public_port | `u16 \| null` | `null` | — | Public port override for generated tg:// links. |
+
+## [general.telemetry]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| core_enabled | `bool` | `true` | — | Enables core hot-path telemetry counters. |
+| user_enabled | `bool` | `true` | — | Enables per-user telemetry counters. |
+| me_level | `"silent" \| "normal" \| "debug"` | `"normal"` | — | Middle-End telemetry verbosity level. |
+
+## [network]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| ipv4 | `bool` | `true` | — | Enables IPv4 networking. |
+| ipv6 | `bool` | `false` | — | Enables/disables IPv6 when set |
+| prefer | `u8` | `4` | Must be `4` or `6`. | Preferred IP family for selection (`4` or `6`). |
+| multipath | `bool` | `false` | — | Enables multipath behavior where supported. |
+| stun_use | `bool` | `true` | none | Global STUN switch; when `false`, STUN probing path is disabled. |
+| stun_servers | `String[]` | Built-in STUN list (13 hosts) | Deduplicated; empty values are removed. | Primary STUN server list for NAT/public endpoint discovery. |
+| stun_tcp_fallback | `bool` | `true` | none | Enables TCP fallback for STUN when UDP path is blocked. |
+| http_ip_detect_urls | `String[]` | `["https://ifconfig.me/ip", "https://api.ipify.org"]` | none | HTTP fallback endpoints for public IP detection when STUN is unavailable. |
+| cache_public_ip_path | `String` | `"cache/public_ip.txt"` | — | File path for caching detected public IP. |
+| dns_overrides | `String[]` | `[]` | Must match `host:port:ip`; IPv6 must be bracketed. | Runtime DNS overrides in `host:port:ip` format. |
+
+## [server]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| port | `u16` | `443` | — | Main proxy listen port. |
+| listen_addr_ipv4 | `String \| null` | `"0.0.0.0"` | — | IPv4 bind address for TCP listener. |
+| listen_addr_ipv6 | `String \| null` | `"::"` | — | IPv6 bind address for TCP listener. |
+| listen_unix_sock | `String \| null` | `null` | — | Unix socket path for listener. |
+| listen_unix_sock_perm | `String \| null` | `null` | — | Unix socket permissions in octal string (e.g., `"0666"`). |
+| listen_tcp | `bool \| null` | `null` (auto) | — | Explicit TCP listener enable/disable override. |
+| proxy_protocol | `bool` | `false` | — | Enables HAProxy PROXY protocol parsing on incoming client connections. |
+| proxy_protocol_header_timeout_ms | `u64` | `500` | Must be `> 0`. | Timeout for PROXY protocol header read/parse (ms). |
+| metrics_port | `u16 \| null` | `null` | — | Metrics endpoint port (enables metrics listener). |
+| metrics_listen | `String \| null` | `null` | — | Full metrics bind address (`IP:PORT`), overrides `metrics_port`. |
+| metrics_whitelist | `IpNetwork[]` | `["127.0.0.1/32", "::1/128"]` | — | CIDR whitelist for metrics endpoint access. |
+| max_connections | `u32` | `10000` | — | Max concurrent client connections (`0` = unlimited). |
+
+## [server.api]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| enabled | `bool` | `true` | — | Enables control-plane REST API. |
+| listen | `String` | `"0.0.0.0:9091"` | Must be valid `IP:PORT`. | API bind address in `IP:PORT` format. |
+| whitelist | `IpNetwork[]` | `["127.0.0.0/8"]` | — | CIDR whitelist allowed to access API. |
+| auth_header | `String` | `""` | — | Exact expected `Authorization` header value (empty = disabled). |
+| request_body_limit_bytes | `usize` | `65536` | Must be `> 0`. | Maximum accepted HTTP request body size. |
+| minimal_runtime_enabled | `bool` | `true` | — | Enables minimal runtime snapshots endpoint logic. |
+| minimal_runtime_cache_ttl_ms | `u64` | `1000` | `0..=60000`. | Cache TTL for minimal runtime snapshots (ms; `0` disables cache). |
+| runtime_edge_enabled | `bool` | `false` | — | Enables runtime edge endpoints. |
+| runtime_edge_cache_ttl_ms | `u64` | `1000` | `0..=60000`. | Cache TTL for runtime edge aggregation payloads (ms). |
+| runtime_edge_top_n | `usize` | `10` | `1..=1000`. | Top-N size for edge connection leaderboard. |
+| runtime_edge_events_capacity | `usize` | `256` | `16..=4096`. | Ring-buffer capacity for runtime edge events. |
+| read_only | `bool` | `false` | — | Rejects mutating API endpoints when enabled. |
+
+## [[server.listeners]]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| ip | `IpAddr` | — | — | Listener bind IP. |
+| announce | `String \| null` | — | — | Public IP/domain announced in proxy links (priority over `announce_ip`). |
+| announce_ip | `IpAddr \| null` | — | — | Deprecated legacy announce IP (migrated to `announce` if needed). |
+| proxy_protocol | `bool \| null` | `null` | — | Per-listener override for PROXY protocol enable flag. |
+| reuse_allow | `bool` | `false` | — | Enables `SO_REUSEPORT` for multi-instance bind sharing. |
+
+## [timeouts]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| client_handshake | `u64` | `30` | — | Client handshake timeout. |
+| tg_connect | `u64` | `10` | — | Upstream Telegram connect timeout. |
+| client_keepalive | `u64` | `15` | — | Client keepalive timeout. |
+| client_ack | `u64` | `90` | — | Client ACK timeout. |
+| me_one_retry | `u8` | `12` | none | Fast reconnect attempts budget for single-endpoint DC scenarios. |
+| me_one_timeout_ms | `u64` | `1200` | none | Timeout in milliseconds for each quick single-endpoint reconnect attempt. |
+
+## [censorship]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| tls_domain | `String` | `"petrovich.ru"` | — | Primary TLS domain used in fake TLS handshake profile. |
+| tls_domains | `String[]` | `[]` | — | Additional TLS domains for generating multiple links. |
+| mask | `bool` | `true` | — | Enables masking/fronting relay mode. |
+| mask_host | `String \| null` | `null` | — | Upstream mask host for TLS fronting relay. |
+| mask_port | `u16` | `443` | — | Upstream mask port for TLS fronting relay. |
+| mask_unix_sock | `String \| null` | `null` | — | Unix socket path for mask backend instead of TCP host/port. |
+| fake_cert_len | `usize` | `2048` | — | Length of synthetic certificate payload when emulation data is unavailable. |
+| tls_emulation | `bool` | `true` | — | Enables certificate/TLS behavior emulation from cached real fronts. |
+| tls_front_dir | `String` | `"tlsfront"` | — | Directory path for TLS front cache storage. |
+| server_hello_delay_min_ms | `u64` | `0` | — | Minimum server_hello delay for anti-fingerprint behavior (ms). |
+| server_hello_delay_max_ms | `u64` | `0` | — | Maximum server_hello delay for anti-fingerprint behavior (ms). |
+| tls_new_session_tickets | `u8` | `0` | — | Number of `NewSessionTicket` messages to emit after handshake. |
+| tls_full_cert_ttl_secs | `u64` | `90` | — | TTL for sending full cert payload per (domain, client IP) tuple. |
+| alpn_enforce | `bool` | `true` | — | Enforces ALPN echo behavior based on client preference. |
+| mask_proxy_protocol | `u8` | `0` | — | PROXY protocol mode for mask backend (`0` disabled, `1` v1, `2` v2). |
+
+## [access]
+
+| Parameter | Type | Default | Constraints / validation | TOML shape example | Description |
+|---|---|---|---|---|---|
+| users | `Map<String, String>` | `{"default": "000…000"}` | Secret must be 32 hex characters. | `[access.users]`<br>`user = "32-hex secret"`<br>`user2 = "32-hex secret"` | User credentials map used for client authentication. |
+| user_ad_tags | `Map<String, String>` | `{}` | Every value must be exactly 32 hex characters. | `[access.user_ad_tags]`<br>`user = "32-hex ad_tag"` | Per-user ad tags used as override over `general.ad_tag`. |
+| user_max_tcp_conns | `Map<String, usize>` | `{}` | — | `[access.user_max_tcp_conns]`<br>`user = 500` | Per-user maximum concurrent TCP connections. |
+| user_expirations | `Map<String, DateTime<Utc>>` | `{}` | Timestamp must be valid RFC3339/ISO-8601 datetime. | `[access.user_expirations]`<br>`user = "2026-12-31T23:59:59Z"` | Per-user account expiration timestamps. |
+| user_data_quota | `Map<String, u64>` | `{}` | — | `[access.user_data_quota]`<br>`user = 1073741824` | Per-user traffic quota in bytes. |
+| user_max_unique_ips | `Map<String, usize>` | `{}` | — | `[access.user_max_unique_ips]`<br>`user = 16` | Per-user unique source IP limits. |
+| user_max_unique_ips_global_each | `usize` | `0` | — | `user_max_unique_ips_global_each = 0` | Global fallback used when `[access.user_max_unique_ips]` has no per-user override. |
+| user_max_unique_ips_mode | `"active_window" \| "time_window" \| "combined"` | `"active_window"` | — | `user_max_unique_ips_mode = "active_window"` | Unique source IP limit accounting mode. |
+| user_max_unique_ips_window_secs | `u64` | `30` | Must be `> 0`. | `user_max_unique_ips_window_secs = 30` | Window size (seconds) used by unique-IP accounting modes that use time windows. |
+| replay_check_len | `usize` | `65536` | — | `replay_check_len = 65536` | Replay-protection storage length. |
+| replay_window_secs | `u64` | `1800` | — | `replay_window_secs = 1800` | Replay-protection window in seconds. |
+| ignore_time_skew | `bool` | `false` | — | `ignore_time_skew = false` | Disables client/server timestamp skew checks in replay validation when enabled. |
+
+## [[upstreams]]
+
+| Parameter | Type | Default | Constraints / validation | Description |
+|---|---|---|---|---|
+| type | `"direct" \| "socks4" \| "socks5"` | — | Required field. | Upstream transport type selector. |
+| weight | `u16` | `1` | none | Base weight used by weighted-random upstream selection. |
+| enabled | `bool` | `true` | none | Disabled entries are excluded from upstream selection at runtime. |
+| scopes | `String` | `""` | none | Comma-separated scope tags used for request-level upstream filtering. |
+| interface | `String \| null` | `null` | Optional; type-specific runtime rules apply. | Optional outbound interface/local bind hint (supported with type-specific rules). |
+| bind_addresses | `String[] \| null` | `null` | Applies to `type = "direct"`. | Optional explicit local source bind addresses for `type = "direct"`. |
+| address | `String` | — | Required for `type = "socks4"` and `type = "socks5"`. | SOCKS server endpoint (`host:port` or `ip:port`) for SOCKS upstream types. |
+| user_id | `String \| null` | `null` | Only for `type = "socks4"`. | SOCKS4 CONNECT user ID (`type = "socks4"` only). |
+| username | `String \| null` | `null` | Only for `type = "socks5"`. | SOCKS5 username (`type = "socks5"` only). |
+| password | `String \| null` | `null` | Only for `type = "socks5"`. | SOCKS5 password (`type = "socks5"` only). |
@@ -181,6 +181,8 @@ docker compose down
 docker build -t telemt:local .
 docker run --name telemt --restart unless-stopped \
  -p 443:443 \
+  -p 9090:9090 \
+  -p 9091:9091 \
  -e RUST_LOG=info \
  -v "$PWD/config.toml:/app/config.toml:ro" \
  --read-only \
@@ -183,6 +183,8 @@ docker compose down
 docker build -t telemt:local .
 docker run --name telemt --restart unless-stopped \
  -p 443:443 \
+  -p 9090:9090 \
+  -p 9091:9091 \
  -e RUST_LOG=info \
  -v "$PWD/config.toml:/app/config.toml:ro" \
  --read-only \
@@ -3,113 +3,554 @@ set -eu

 REPO="${REPO:-telemt/telemt}"
 BIN_NAME="${BIN_NAME:-telemt}"
-VERSION="${1:-${VERSION:-latest}}"
-INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"
+INSTALL_DIR="${INSTALL_DIR:-/bin}"
+CONFIG_DIR="${CONFIG_DIR:-/etc/telemt}"
+CONFIG_FILE="${CONFIG_FILE:-${CONFIG_DIR}/telemt.toml}"
+WORK_DIR="${WORK_DIR:-/opt/telemt}"
+TLS_DOMAIN="${TLS_DOMAIN:-petrovich.ru}"
+SERVICE_NAME="telemt"
+TEMP_DIR=""
+SUDO=""
+CONFIG_PARENT_DIR=""
+SERVICE_START_FAILED=0
+
+ACTION="install"
+TARGET_VERSION="${VERSION:-latest}"
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        -h|--help) ACTION="help"; shift ;;
+        uninstall|--uninstall)
+            if [ "$ACTION" != "purge" ]; then ACTION="uninstall"; fi
+            shift ;;
+        purge|--purge) ACTION="purge"; shift ;;
+        install|--install) ACTION="install"; shift ;;
+        -*) printf '[ERROR] Unknown option: %s\n' "$1" >&2; exit 1 ;;
+        *)
+            if [ "$ACTION" = "install" ]; then TARGET_VERSION="$1"
+            else printf '[WARNING] Ignoring extra argument: %s\n' "$1" >&2; fi
+            shift ;;
+    esac
+done

 say() {
-    printf '%s\n' "$*"
+    if [ "$#" -eq 0 ] || [ -z "${1:-}" ]; then
+        printf '\n'
+    else
+        printf '[INFO] %s\n' "$*"
+    fi
+}
+die() { printf '[ERROR] %s\n' "$*" >&2; exit 1; }
+
+write_root() { $SUDO sh -c 'cat > "$1"' _ "$1"; }
+
+cleanup() {
+    if [ -n "${TEMP_DIR:-}" ] && [ -d "$TEMP_DIR" ]; then
+        rm -rf -- "$TEMP_DIR"
+    fi
+}
+trap cleanup EXIT INT TERM
+
+show_help() {
+    say "Usage: $0 [ <version> | install | uninstall | purge | --help ]"
+    say "  <version>    Install specific version (e.g. 3.3.15, default: latest)"
+    say "  install      Install the latest version"
+    say "  uninstall    Remove the binary and service (keeps config and user)"
+    say "  purge        Remove everything including configuration, data, and user"
+    exit 0
 }

-die() {
-    printf 'Error: %s\n' "$*" >&2
-    exit 1
+check_os_entity() {
+    if command -v getent >/dev/null 2>&1; then getent "$1" "$2" >/dev/null 2>&1
+    else grep -q "^${2}:" "/etc/$1" 2>/dev/null; fi
 }

-need_cmd() {
-    command -v "$1" >/dev/null 2>&1 || die "required command not found: $1"
+normalize_path() {
+    printf '%s\n' "$1" | tr -s '/' | sed 's|/$||; s|^$|/|'
 }

-detect_os() {
-    os="$(uname -s)"
-    case "$os" in
-        Linux) printf 'linux\n' ;;
-        OpenBSD) printf 'openbsd\n' ;;
-        *) printf '%s\n' "$os" ;;
+get_realpath() {
+    path_in="$1"
+    case "$path_in" in /*) ;; *) path_in="$(pwd)/$path_in" ;; esac
+
+    if command -v realpath >/dev/null 2>&1; then 
+        if realpath_out="$(realpath -m "$path_in" 2>/dev/null)"; then
+            printf '%s\n' "$realpath_out"
+            return
+        fi
+    fi
+    
+    if command -v readlink >/dev/null 2>&1; then
+        resolved_path="$(readlink -f "$path_in" 2>/dev/null || true)"
+        if [ -n "$resolved_path" ]; then
+            printf '%s\n' "$resolved_path"
+            return
+        fi
+    fi
+
+    d="${path_in%/*}"; b="${path_in##*/}"
+    if [ -z "$d" ]; then d="/"; fi
+    if [ "$d" = "$path_in" ]; then d="/"; b="$path_in"; fi
+
+    if [ -d "$d" ]; then
+        abs_d="$(cd "$d" >/dev/null 2>&1 && pwd || true)"
+        if [ -n "$abs_d" ]; then
+            if [ "$b" = "." ] || [ -z "$b" ]; then printf '%s\n' "$abs_d"
+            elif [ "$abs_d" = "/" ]; then printf '/%s\n' "$b"
+            else printf '%s/%s\n' "$abs_d" "$b"; fi
+        else
+            normalize_path "$path_in"
+        fi
+    else
+        normalize_path "$path_in"
+    fi
+}
+
+get_svc_mgr() {
+    if command -v systemctl >/dev/null 2>&1 && [ -d /run/systemd/system ]; then echo "systemd"
+    elif command -v rc-service >/dev/null 2>&1; then echo "openrc"
+    else echo "none"; fi
+}
+
+verify_common() {
+    [ -n "$BIN_NAME" ] || die "BIN_NAME cannot be empty."
+    [ -n "$INSTALL_DIR" ] || die "INSTALL_DIR cannot be empty."
+    [ -n "$CONFIG_DIR" ] || die "CONFIG_DIR cannot be empty."
+    [ -n "$CONFIG_FILE" ] || die "CONFIG_FILE cannot be empty."
+
+    case "${INSTALL_DIR}${CONFIG_DIR}${WORK_DIR}${CONFIG_FILE}" in
+        *[!a-zA-Z0-9_./-]*) die "Invalid characters in paths. Only alphanumeric, _, ., -, and / allowed." ;;
    esac
+
+    case "$TARGET_VERSION" in *[!a-zA-Z0-9_.-]*) die "Invalid characters in version." ;; esac
+    case "$BIN_NAME" in *[!a-zA-Z0-9_-]*) die "Invalid characters in BIN_NAME." ;; esac
+
+    INSTALL_DIR="$(get_realpath "$INSTALL_DIR")"
+    CONFIG_DIR="$(get_realpath "$CONFIG_DIR")"
+    WORK_DIR="$(get_realpath "$WORK_DIR")"
+    CONFIG_FILE="$(get_realpath "$CONFIG_FILE")"
+
+    CONFIG_PARENT_DIR="${CONFIG_FILE%/*}"
+    if [ -z "$CONFIG_PARENT_DIR" ]; then CONFIG_PARENT_DIR="/"; fi
+    if [ "$CONFIG_PARENT_DIR" = "$CONFIG_FILE" ]; then CONFIG_PARENT_DIR="."; fi
+
+    if [ "$(id -u)" -eq 0 ]; then
+        SUDO=""
+    else
+        command -v sudo >/dev/null 2>&1 || die "This script requires root or sudo. Neither found."
+        SUDO="sudo"
+        if ! sudo -n true 2>/dev/null; then
+            if ! [ -t 0 ]; then
+                die "sudo requires a password, but no TTY detected. Aborting to prevent hang."
+            fi
+        fi
+    fi
+
+    if [ -n "$SUDO" ]; then
+        if $SUDO sh -c '[ -d "$1" ]' _ "$CONFIG_FILE"; then
+            die "Safety check failed: CONFIG_FILE '$CONFIG_FILE' is a directory."
+        fi
+    elif [ -d "$CONFIG_FILE" ]; then
+        die "Safety check failed: CONFIG_FILE '$CONFIG_FILE' is a directory."
+    fi
+
+    for path in "$CONFIG_DIR" "$CONFIG_PARENT_DIR" "$WORK_DIR"; do
+        check_path="$(get_realpath "$path")"
+        case "$check_path" in
+            /|/bin|/sbin|/usr|/usr/bin|/usr/sbin|/usr/local|/usr/local/bin|/usr/local/sbin|/usr/local/etc|/usr/local/share|/etc|/var|/var/lib|/var/log|/var/run|/home|/root|/tmp|/lib|/lib64|/opt|/run|/boot|/dev|/sys|/proc)
+                die "Safety check failed: '$path' (resolved to '$check_path') is a critical system directory." ;;
+        esac
+    done
+
+    check_install_dir="$(get_realpath "$INSTALL_DIR")"
+    case "$check_install_dir" in
+        /|/etc|/var|/home|/root|/tmp|/usr|/usr/local|/opt|/boot|/dev|/sys|/proc|/run)
+            die "Safety check failed: INSTALL_DIR '$INSTALL_DIR' is a critical system directory." ;;
+    esac
+
+    for cmd in id uname grep find rm chown chmod mv mktemp mkdir tr dd sed ps head sleep cat tar gzip rmdir; do
+        command -v "$cmd" >/dev/null 2>&1 || die "Required command not found: $cmd"
+    done
+}
+
+verify_install_deps() {
+    command -v curl >/dev/null 2>&1 || command -v wget >/dev/null 2>&1 || die "Neither curl nor wget is installed."
+    command -v cp >/dev/null 2>&1 || command -v install >/dev/null 2>&1 || die "Need cp or install"
+
+    if ! command -v setcap >/dev/null 2>&1; then
+        if command -v apk >/dev/null 2>&1; then
+            $SUDO apk add --no-cache libcap-utils >/dev/null 2>&1 || $SUDO apk add --no-cache libcap >/dev/null 2>&1 || true
+        elif command -v apt-get >/dev/null 2>&1; then
+            $SUDO apt-get update -q >/dev/null 2>&1 || true
+            $SUDO apt-get install -y -q libcap2-bin >/dev/null 2>&1 || true
+        elif command -v dnf >/dev/null 2>&1; then $SUDO dnf install -y -q libcap >/dev/null 2>&1 || true
+        elif command -v yum >/dev/null 2>&1; then $SUDO yum install -y -q libcap >/dev/null 2>&1 || true
+        fi
+    fi
 }

 detect_arch() {
-    arch="$(uname -m)"
-    case "$arch" in
-        x86_64|amd64) printf 'x86_64\n' ;;
-        aarch64|arm64) printf 'aarch64\n' ;;
-        *) die "unsupported architecture: $arch" ;;
+    sys_arch="$(uname -m)"
+    case "$sys_arch" in
+        x86_64|amd64) echo "x86_64" ;;
+        aarch64|arm64) echo "aarch64" ;;
+        *) die "Unsupported architecture: $sys_arch" ;;
    esac
 }

 detect_libc() {
-    case "$(ldd --version 2>&1 || true)" in
-        *musl*) printf 'musl\n' ;;
-        *) printf 'gnu\n' ;;
-    esac
+    for f in /lib/ld-musl-*.so.* /lib64/ld-musl-*.so.*; do
+        if [ -e "$f" ]; then echo "musl"; return 0; fi
+    done
+    if grep -qE '^ID="?alpine"?' /etc/os-release 2>/dev/null; then echo "musl"; return 0; fi
+    if command -v ldd >/dev/null 2>&1 && (ldd --version 2>&1 || true) | grep -qi musl; then echo "musl"; return 0; fi
+    echo "gnu"
 }

-fetch_to_stdout() {
-    url="$1"
-    if command -v curl >/dev/null 2>&1; then
-        curl -fsSL "$url"
-    elif command -v wget >/dev/null 2>&1; then
-        wget -qO- "$url"
-    else
-        die "neither curl nor wget is installed"
+fetch_file() {
+    if command -v curl >/dev/null 2>&1; then curl -fsSL "$1" -o "$2"
+    else wget -q -O "$2" "$1"; fi
+}
+
+ensure_user_group() {
+    nologin_bin="$(command -v nologin 2>/dev/null || command -v false 2>/dev/null || echo /bin/false)"
+
+    if ! check_os_entity group telemt; then
+        if command -v groupadd >/dev/null 2>&1; then $SUDO groupadd -r telemt
+        elif command -v addgroup >/dev/null 2>&1; then $SUDO addgroup -S telemt
+        else die "Cannot create group"; fi
+    fi
+
+    if ! check_os_entity passwd telemt; then
+        if command -v useradd >/dev/null 2>&1; then
+            $SUDO useradd -r -g telemt -d "$WORK_DIR" -s "$nologin_bin" -c "Telemt Proxy" telemt
+        elif command -v adduser >/dev/null 2>&1; then
+            if adduser --help 2>&1 | grep -q -- '-S'; then
+                $SUDO adduser -S -D -H -h "$WORK_DIR" -s "$nologin_bin" -G telemt telemt
+            else
+                $SUDO adduser --system --home "$WORK_DIR" --shell "$nologin_bin" --no-create-home --ingroup telemt --disabled-password telemt
+            fi
+        else die "Cannot create user"; fi
+    fi
+}
+
+setup_dirs() {
+    $SUDO mkdir -p "$WORK_DIR" "$CONFIG_DIR" "$CONFIG_PARENT_DIR" || die "Failed to create directories"
+    
+    $SUDO chown telemt:telemt "$WORK_DIR" && $SUDO chmod 750 "$WORK_DIR"
+    $SUDO chown root:telemt "$CONFIG_DIR" && $SUDO chmod 750 "$CONFIG_DIR"
+    
+    if [ "$CONFIG_PARENT_DIR" != "$CONFIG_DIR" ] && [ "$CONFIG_PARENT_DIR" != "." ] && [ "$CONFIG_PARENT_DIR" != "/" ]; then
+        $SUDO chown root:telemt "$CONFIG_PARENT_DIR" && $SUDO chmod 750 "$CONFIG_PARENT_DIR"
+    fi
+}
+
+stop_service() {
+    svc="$(get_svc_mgr)"
+    if [ "$svc" = "systemd" ] && systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
+        $SUDO systemctl stop "$SERVICE_NAME" 2>/dev/null || true
+    elif [ "$svc" = "openrc" ] && rc-service "$SERVICE_NAME" status >/dev/null 2>&1; then
+        $SUDO rc-service "$SERVICE_NAME" stop 2>/dev/null || true
    fi
 }

 install_binary() {
-    src="$1"
-    dst="$2"
+    bin_src="$1"; bin_dst="$2"
+    if [ -e "$INSTALL_DIR" ] && [ ! -d "$INSTALL_DIR" ]; then
+        die "'$INSTALL_DIR' is not a directory."
+    fi

-    if [ -w "$INSTALL_DIR" ] || { [ ! -e "$INSTALL_DIR" ] && [ -w "$(dirname "$INSTALL_DIR")" ]; }; then
-        mkdir -p "$INSTALL_DIR"
-        install -m 0755 "$src" "$dst"
-    elif command -v sudo >/dev/null 2>&1; then
-        sudo mkdir -p "$INSTALL_DIR"
-        sudo install -m 0755 "$src" "$dst"
+    $SUDO mkdir -p "$INSTALL_DIR" || die "Failed to create install directory"
+    if command -v install >/dev/null 2>&1; then
+        $SUDO install -m 0755 "$bin_src" "$bin_dst" || die "Failed to install binary"
    else
-        die "cannot write to $INSTALL_DIR and sudo is not available"
+        $SUDO rm -f "$bin_dst" 2>/dev/null || true
+        $SUDO cp "$bin_src" "$bin_dst" && $SUDO chmod 0755 "$bin_dst" || die "Failed to copy binary"
+    fi
+
+    $SUDO sh -c '[ -x "$1" ]' _ "$bin_dst" || die "Binary not executable: $bin_dst"
+
+    if command -v setcap >/dev/null 2>&1; then
+        $SUDO setcap cap_net_bind_service=+ep "$bin_dst" 2>/dev/null || true
    fi
 }

-need_cmd uname
-need_cmd tar
-need_cmd mktemp
-need_cmd grep
-need_cmd install
+generate_secret() {
+    secret="$(command -v openssl >/dev/null 2>&1 && openssl rand -hex 16 2>/dev/null || true)"
+    if [ -z "$secret" ] || [ "${#secret}" -ne 32 ]; then
+        if command -v od >/dev/null 2>&1; then secret="$(dd if=/dev/urandom bs=16 count=1 2>/dev/null | od -An -tx1 | tr -d ' \n')"
+        elif command -v hexdump >/dev/null 2>&1; then secret="$(dd if=/dev/urandom bs=16 count=1 2>/dev/null | hexdump -e '1/1 "%02x"')"
+        elif command -v xxd >/dev/null 2>&1; then secret="$(dd if=/dev/urandom bs=16 count=1 2>/dev/null | xxd -p | tr -d '\n')"
+        fi
+    fi
+    if [ "${#secret}" -eq 32 ]; then echo "$secret"; else return 1; fi
+}

-ARCH="$(detect_arch)"
-OS="$(detect_os)"
+generate_config_content() {
+    escaped_tls_domain="$(printf '%s\n' "$TLS_DOMAIN" | tr -d '[:cntrl:]' | sed 's/\\/\\\\/g; s/"/\\"/g')"

-if [ "$OS" != "linux" ]; then
-    case "$OS" in
-        openbsd)
-            die "install.sh installs only Linux release artifacts. On OpenBSD, build from source (see docs/OPENBSD.en.md)."
-            ;;
-        *)
-            die "unsupported operating system for install.sh: $OS"
-            ;;
-    esac
-fi
+    cat <<EOF
+[general]
+use_middle_proxy = false

-LIBC="$(detect_libc)"
+[general.modes]
+classic = false
+secure = false
+tls = true

-case "$VERSION" in
-    latest)
-        URL="https://github.com/$REPO/releases/latest/download/${BIN_NAME}-${ARCH}-linux-${LIBC}.tar.gz"
-        ;;
-    *)
-        URL="https://github.com/$REPO/releases/download/${VERSION}/${BIN_NAME}-${ARCH}-linux-${LIBC}.tar.gz"
+[server]
+port = 443
+
+[server.api]
+enabled = true
+listen = "127.0.0.1:9091"
+whitelist = ["127.0.0.1/32"]
+
+[censorship]
+tls_domain = "${escaped_tls_domain}"
+
+[access.users]
+hello = "$1"
+EOF
+}
+
+install_config() {
+    if [ -n "$SUDO" ]; then
+        if $SUDO sh -c '[ -f "$1" ]' _ "$CONFIG_FILE"; then
+            say "  -> Config already exists at $CONFIG_FILE. Skipping creation."
+            return 0
+        fi
+    elif [ -f "$CONFIG_FILE" ]; then
+        say "  -> Config already exists at $CONFIG_FILE. Skipping creation."
+        return 0
+    fi
+
+    toml_secret="$(generate_secret)" || die "Failed to generate secret."
+
+    generate_config_content "$toml_secret" | write_root "$CONFIG_FILE" || die "Failed to install config"
+    $SUDO chown root:telemt "$CONFIG_FILE" && $SUDO chmod 640 "$CONFIG_FILE"
+
+    say "  -> Config created successfully."
+    say "  -> Generated secret for default user 'hello': $toml_secret"
+}
+
+generate_systemd_content() {
+    cat <<EOF
+[Unit]
+Description=Telemt
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=telemt
+Group=telemt
+WorkingDirectory=$WORK_DIR
+ExecStart="${INSTALL_DIR}/${BIN_NAME}" "${CONFIG_FILE}"
+Restart=on-failure
+LimitNOFILE=65536
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+
+[Install]
+WantedBy=multi-user.target
+EOF
+}
+
+generate_openrc_content() {
+    cat <<EOF
+#!/sbin/openrc-run
+name="$SERVICE_NAME"
+description="Telemt Proxy Service"
+command="${INSTALL_DIR}/${BIN_NAME}"
+command_args="${CONFIG_FILE}"
+command_background=true
+command_user="telemt:telemt"
+pidfile="/run/\${RC_SVCNAME}.pid"
+directory="${WORK_DIR}"
+rc_ulimit="-n 65536"
+depend() { need net; use logger; }
+EOF
+}
+
+install_service() {
+    svc="$(get_svc_mgr)"
+    if [ "$svc" = "systemd" ]; then
+        generate_systemd_content | write_root "/etc/systemd/system/${SERVICE_NAME}.service"
+        $SUDO chown root:root "/etc/systemd/system/${SERVICE_NAME}.service" && $SUDO chmod 644 "/etc/systemd/system/${SERVICE_NAME}.service"
+
+        $SUDO systemctl daemon-reload || true
+        $SUDO systemctl enable "$SERVICE_NAME" || true
+        
+        if ! $SUDO systemctl start "$SERVICE_NAME"; then
+            say "[WARNING] Failed to start service"
+            SERVICE_START_FAILED=1
+        fi
+    elif [ "$svc" = "openrc" ]; then
+        generate_openrc_content | write_root "/etc/init.d/${SERVICE_NAME}"
+        $SUDO chown root:root "/etc/init.d/${SERVICE_NAME}" && $SUDO chmod 0755 "/etc/init.d/${SERVICE_NAME}"
+
+        $SUDO rc-update add "$SERVICE_NAME" default 2>/dev/null || true
+        
+        if ! $SUDO rc-service "$SERVICE_NAME" start 2>/dev/null; then
+            say "[WARNING] Failed to start service"
+            SERVICE_START_FAILED=1
+        fi
+    else
+        cmd="\"${INSTALL_DIR}/${BIN_NAME}\" \"${CONFIG_FILE}\""
+        if [ -n "$SUDO" ]; then 
+            say "  -> Service manager not found. Start manually: sudo -u telemt $cmd"
+        else 
+            say "  -> Service manager not found. Start manually: su -s /bin/sh telemt -c '$cmd'"
+        fi
+    fi
+}
+
+kill_user_procs() {
+    if command -v pkill >/dev/null 2>&1; then
+        $SUDO pkill -u telemt "$BIN_NAME" 2>/dev/null || true
+        sleep 1
+        $SUDO pkill -9 -u telemt "$BIN_NAME" 2>/dev/null || true
+    else
+        if command -v pgrep >/dev/null 2>&1; then
+            pids="$(pgrep -u telemt 2>/dev/null || true)"
+        else
+            pids="$(ps -u telemt -o pid= 2>/dev/null || true)"
+        fi
+        
+        if [ -n "$pids" ]; then
+            for pid in $pids; do
+                case "$pid" in ''|*[!0-9]*) continue ;; *) $SUDO kill "$pid" 2>/dev/null || true ;; esac
+            done
+            sleep 1
+            for pid in $pids; do
+                case "$pid" in ''|*[!0-9]*) continue ;; *) $SUDO kill -9 "$pid" 2>/dev/null || true ;; esac
+            done
+        fi
+    fi
+}
+
+uninstall() {
+    say "Starting uninstallation of $BIN_NAME..."
+
+    say ">>> Stage 1: Stopping services"
+    stop_service
+
+    say ">>> Stage 2: Removing service configuration"
+    svc="$(get_svc_mgr)"
+    if [ "$svc" = "systemd" ]; then
+        $SUDO systemctl disable "$SERVICE_NAME" 2>/dev/null || true
+        $SUDO rm -f "/etc/systemd/system/${SERVICE_NAME}.service"
+        $SUDO systemctl daemon-reload 2>/dev/null || true
+    elif [ "$svc" = "openrc" ]; then
+        $SUDO rc-update del "$SERVICE_NAME" 2>/dev/null || true
+        $SUDO rm -f "/etc/init.d/${SERVICE_NAME}"
+    fi
+
+    say ">>> Stage 3: Terminating user processes"
+    kill_user_procs
+
+    say ">>> Stage 4: Removing binary"
+    $SUDO rm -f "${INSTALL_DIR}/${BIN_NAME}"
+
+    if [ "$ACTION" = "purge" ]; then
+        say ">>> Stage 5: Purging configuration, data, and user"
+        $SUDO rm -rf "$CONFIG_DIR" "$WORK_DIR"
+        $SUDO rm -f "$CONFIG_FILE"
+        if [ "$CONFIG_PARENT_DIR" != "$CONFIG_DIR" ] && [ "$CONFIG_PARENT_DIR" != "." ] && [ "$CONFIG_PARENT_DIR" != "/" ]; then
+            $SUDO rmdir "$CONFIG_PARENT_DIR" 2>/dev/null || true
+        fi
+        $SUDO userdel telemt 2>/dev/null || $SUDO deluser telemt 2>/dev/null || true
+        $SUDO groupdel telemt 2>/dev/null || $SUDO delgroup telemt 2>/dev/null || true
+    else
+        say "Note: Configuration and user kept. Run with 'purge' to remove completely."
+    fi
+    
+    printf '\n====================================================================\n'
+    printf '                    UNINSTALLATION COMPLETE\n'
+    printf '====================================================================\n\n'
+    exit 0
+}
+
+case "$ACTION" in
+    help) show_help ;;
+    uninstall|purge) verify_common; uninstall ;;
+    install)
+        say "Starting installation of $BIN_NAME (Version: $TARGET_VERSION)"
+
+        say ">>> Stage 1: Verifying environment and dependencies"
+        verify_common; verify_install_deps
+
+        if [ "$TARGET_VERSION" != "latest" ]; then 
+            TARGET_VERSION="${TARGET_VERSION#v}"
+        fi
+        
+        ARCH="$(detect_arch)"; LIBC="$(detect_libc)"
+        FILE_NAME="${BIN_NAME}-${ARCH}-linux-${LIBC}.tar.gz"
+        
+        if [ "$TARGET_VERSION" = "latest" ]; then
+            DL_URL="https://github.com/${REPO}/releases/latest/download/${FILE_NAME}"
+        else 
+            DL_URL="https://github.com/${REPO}/releases/download/${TARGET_VERSION}/${FILE_NAME}"
+        fi
+
+        say ">>> Stage 2: Downloading archive"
+        TEMP_DIR="$(mktemp -d)" || die "Temp directory creation failed"
+        if [ -z "$TEMP_DIR" ] || [ ! -d "$TEMP_DIR" ]; then
+            die "Temp directory is invalid or was not created"
+        fi
+
+        fetch_file "$DL_URL" "${TEMP_DIR}/${FILE_NAME}" || die "Download failed"
+
+        say ">>> Stage 3: Extracting archive"
+        if ! gzip -dc "${TEMP_DIR}/${FILE_NAME}" | tar -xf - -C "$TEMP_DIR" 2>/dev/null; then
+            die "Extraction failed (downloaded archive might be invalid or 404)."
+        fi
+
+        EXTRACTED_BIN="$(find "$TEMP_DIR" -type f -name "$BIN_NAME" -print 2>/dev/null | head -n 1 || true)"
+        [ -n "$EXTRACTED_BIN" ] || die "Binary '$BIN_NAME' not found in archive"
+
+        say ">>> Stage 4: Setting up environment (User, Group, Directories)"
+        ensure_user_group; setup_dirs; stop_service
+        
+        say ">>> Stage 5: Installing binary"
+        install_binary "$EXTRACTED_BIN" "${INSTALL_DIR}/${BIN_NAME}"
+        
+        say ">>> Stage 6: Generating configuration"
+        install_config
+        
+        say ">>> Stage 7: Installing and starting service"
+        install_service
+
+        if [ "${SERVICE_START_FAILED:-0}" -eq 1 ]; then
+            printf '\n====================================================================\n'
+            printf '               INSTALLATION COMPLETED WITH WARNINGS\n'
+            printf '====================================================================\n\n'
+            printf 'The service was installed but failed to start automatically.\n'
+            printf 'Please check the logs to determine the issue.\n\n'
+        else
+            printf '\n====================================================================\n'
+            printf '                      INSTALLATION SUCCESS\n'
+            printf '====================================================================\n\n'
+        fi
+        
+        svc="$(get_svc_mgr)"
+        if [ "$svc" = "systemd" ]; then
+            printf 'To check the status of your proxy service, run:\n'
+            printf '  systemctl status %s\n\n' "$SERVICE_NAME"
+        elif [ "$svc" = "openrc" ]; then
+            printf 'To check the status of your proxy service, run:\n'
+            printf '  rc-service %s status\n\n' "$SERVICE_NAME"
+        fi
+        
+        printf 'To get your user connection links (for Telegram), run:\n'
+        if command -v jq >/dev/null 2>&1; then
+            printf '  curl -s http://127.0.0.1:9091/v1/users | jq -r '\''.data[] | "User: \\(.username)\\n\\(.links.tls[0] // empty)\\n"'\''\n'
+        else
+            printf '  curl -s http://127.0.0.1:9091/v1/users\n'
+            printf '  (Tip: Install '\''jq'\'' for a much cleaner output)\n'
+        fi
+        
+        printf '\n====================================================================\n'
        ;;
 esac
-
-TMPDIR="$(mktemp -d)"
-trap 'rm -rf "$TMPDIR"' EXIT INT TERM
-
-say "Installing $BIN_NAME ($VERSION) for $ARCH-linux-$LIBC..."
-fetch_to_stdout "$URL" | tar -xzf - -C "$TMPDIR"
-
-[ -f "$TMPDIR/$BIN_NAME" ] || die "archive did not contain $BIN_NAME"
-
-install_binary "$TMPDIR/$BIN_NAME" "$INSTALL_DIR/$BIN_NAME"
-
-say "Installed: $INSTALL_DIR/$BIN_NAME"
-"$INSTALL_DIR/$BIN_NAME" --version 2>/dev/null || true
@@ -195,6 +195,8 @@ pub(super) struct ZeroPoolData {
    pub(super) pool_swap_total: u64,
    pub(super) pool_drain_active: u64,
    pub(super) pool_force_close_total: u64,
+    pub(super) pool_drain_soft_evict_total: u64,
+    pub(super) pool_drain_soft_evict_writer_total: u64,
    pub(super) pool_stale_pick_total: u64,
    pub(super) writer_removed_total: u64,
    pub(super) writer_removed_unexpected_total: u64,
@@ -235,6 +237,7 @@ pub(super) struct MeWritersSummary {
    pub(super) available_pct: f64,
    pub(super) required_writers: usize,
    pub(super) alive_writers: usize,
+    pub(super) coverage_ratio: f64,
    pub(super) coverage_pct: f64,
    pub(super) fresh_alive_writers: usize,
    pub(super) fresh_coverage_pct: f64,
@@ -283,6 +286,7 @@ pub(super) struct DcStatus {
    pub(super) floor_max: usize,
    pub(super) floor_capped: bool,
    pub(super) alive_writers: usize,
+    pub(super) coverage_ratio: f64,
    pub(super) coverage_pct: f64,
    pub(super) fresh_alive_writers: usize,
    pub(super) fresh_coverage_pct: f64,
@@ -360,6 +364,12 @@ pub(super) struct MinimalMeRuntimeData {
    pub(super) me_reconnect_backoff_cap_ms: u64,
    pub(super) me_reconnect_fast_retry_count: u32,
    pub(super) me_pool_drain_ttl_secs: u64,
+    pub(super) me_instadrain: bool,
+    pub(super) me_pool_drain_soft_evict_enabled: bool,
+    pub(super) me_pool_drain_soft_evict_grace_secs: u64,
+    pub(super) me_pool_drain_soft_evict_per_writer: u8,
+    pub(super) me_pool_drain_soft_evict_budget_per_core: u16,
+    pub(super) me_pool_drain_soft_evict_cooldown_ms: u64,
    pub(super) me_pool_force_close_secs: u64,
    pub(super) me_pool_min_fresh_ratio: f32,
    pub(super) me_bind_stale_mode: &'static str,
@@ -113,6 +113,7 @@ pub(super) struct RuntimeMeQualityDcRttData {
    pub(super) rtt_ema_ms: Option<f64>,
    pub(super) alive_writers: usize,
    pub(super) required_writers: usize,
+    pub(super) coverage_ratio: f64,
    pub(super) coverage_pct: f64,
 }

@@ -388,6 +389,7 @@ pub(super) async fn build_runtime_me_quality_data(shared: &ApiShared) -> Runtime
                    rtt_ema_ms: dc.rtt_ms,
                    alive_writers: dc.alive_writers,
                    required_writers: dc.required_writers,
+                    coverage_ratio: dc.coverage_ratio,
                    coverage_pct: dc.coverage_pct,
                })
                .collect(),
@@ -96,6 +96,8 @@ pub(super) fn build_zero_all_data(stats: &Stats, configured_users: usize) -> Zer
            pool_swap_total: stats.get_pool_swap_total(),
            pool_drain_active: stats.get_pool_drain_active(),
            pool_force_close_total: stats.get_pool_force_close_total(),
+            pool_drain_soft_evict_total: stats.get_pool_drain_soft_evict_total(),
+            pool_drain_soft_evict_writer_total: stats.get_pool_drain_soft_evict_writer_total(),
            pool_stale_pick_total: stats.get_pool_stale_pick_total(),
            writer_removed_total: stats.get_me_writer_removed_total(),
            writer_removed_unexpected_total: stats.get_me_writer_removed_unexpected_total(),
@@ -313,6 +315,7 @@ async fn get_minimal_payload_cached(
            available_pct: status.available_pct,
            required_writers: status.required_writers,
            alive_writers: status.alive_writers,
+            coverage_ratio: status.coverage_ratio,
            coverage_pct: status.coverage_pct,
            fresh_alive_writers: status.fresh_alive_writers,
            fresh_coverage_pct: status.fresh_coverage_pct,
@@ -370,6 +373,7 @@ async fn get_minimal_payload_cached(
                floor_max: entry.floor_max,
                floor_capped: entry.floor_capped,
                alive_writers: entry.alive_writers,
+                coverage_ratio: entry.coverage_ratio,
                coverage_pct: entry.coverage_pct,
                fresh_alive_writers: entry.fresh_alive_writers,
                fresh_coverage_pct: entry.fresh_coverage_pct,
@@ -427,6 +431,12 @@ async fn get_minimal_payload_cached(
        me_reconnect_backoff_cap_ms: runtime.me_reconnect_backoff_cap_ms,
        me_reconnect_fast_retry_count: runtime.me_reconnect_fast_retry_count,
        me_pool_drain_ttl_secs: runtime.me_pool_drain_ttl_secs,
+        me_instadrain: runtime.me_instadrain,
+        me_pool_drain_soft_evict_enabled: runtime.me_pool_drain_soft_evict_enabled,
+        me_pool_drain_soft_evict_grace_secs: runtime.me_pool_drain_soft_evict_grace_secs,
+        me_pool_drain_soft_evict_per_writer: runtime.me_pool_drain_soft_evict_per_writer,
+        me_pool_drain_soft_evict_budget_per_core: runtime.me_pool_drain_soft_evict_budget_per_core,
+        me_pool_drain_soft_evict_cooldown_ms: runtime.me_pool_drain_soft_evict_cooldown_ms,
        me_pool_force_close_secs: runtime.me_pool_force_close_secs,
        me_pool_min_fresh_ratio: runtime.me_pool_min_fresh_ratio,
        me_bind_stale_mode: runtime.me_bind_stale_mode,
@@ -495,6 +505,7 @@ fn disabled_me_writers(now_epoch_secs: u64, reason: &'static str) -> MeWritersDa
            available_pct: 0.0,
            required_writers: 0,
            alive_writers: 0,
+            coverage_ratio: 0.0,
            coverage_pct: 0.0,
            fresh_alive_writers: 0,
            fresh_coverage_pct: 0.0,
@@ -198,6 +198,7 @@ desync_all_full = false
 update_every = 43200
 hardswap = false
 me_pool_drain_ttl_secs = 90
+me_instadrain = false
 me_pool_min_fresh_ratio = 0.8
 me_reinit_drain_timeout_secs = 120

@@ -239,7 +240,7 @@ tls_full_cert_ttl_secs = 90

 [access]
 replay_check_len = 65536
-replay_window_secs = 120
+replay_window_secs = 1800
 ignore_time_skew = false

 [access.users]
@@ -27,8 +27,8 @@ const DEFAULT_ME_C2ME_CHANNEL_CAPACITY: usize = 1024;
 const DEFAULT_ME_READER_ROUTE_DATA_WAIT_MS: u64 = 2;
 const DEFAULT_ME_D2C_FLUSH_BATCH_MAX_FRAMES: usize = 32;
 const DEFAULT_ME_D2C_FLUSH_BATCH_MAX_BYTES: usize = 128 * 1024;
-const DEFAULT_ME_D2C_FLUSH_BATCH_MAX_DELAY_US: u64 = 1500;
-const DEFAULT_ME_D2C_ACK_FLUSH_IMMEDIATE: bool = false;
+const DEFAULT_ME_D2C_FLUSH_BATCH_MAX_DELAY_US: u64 = 500;
+const DEFAULT_ME_D2C_ACK_FLUSH_IMMEDIATE: bool = true;
 const DEFAULT_DIRECT_RELAY_COPY_BUF_C2S_BYTES: usize = 64 * 1024;
 const DEFAULT_DIRECT_RELAY_COPY_BUF_S2C_BYTES: usize = 256 * 1024;
 const DEFAULT_ME_WRITER_PICK_SAMPLE_SIZE: u8 = 3;
@@ -36,7 +36,16 @@ const DEFAULT_ME_HEALTH_INTERVAL_MS_UNHEALTHY: u64 = 1000;
 const DEFAULT_ME_HEALTH_INTERVAL_MS_HEALTHY: u64 = 3000;
 const DEFAULT_ME_ADMISSION_POLL_MS: u64 = 1000;
 const DEFAULT_ME_WARN_RATE_LIMIT_MS: u64 = 5000;
+const DEFAULT_ME_ROUTE_HYBRID_MAX_WAIT_MS: u64 = 3000;
+const DEFAULT_ME_ROUTE_BLOCKING_SEND_TIMEOUT_MS: u64 = 250;
+const DEFAULT_ME_C2ME_SEND_TIMEOUT_MS: u64 = 4000;
+const DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_ENABLED: bool = true;
+const DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_GRACE_SECS: u64 = 30;
+const DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_PER_WRITER: u8 = 1;
+const DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_BUDGET_PER_CORE: u16 = 8;
+const DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_COOLDOWN_MS: u64 = 5000;
 const DEFAULT_USER_MAX_UNIQUE_IPS_WINDOW_SECS: u64 = 30;
+const DEFAULT_ACCEPT_PERMIT_TIMEOUT_MS: u64 = 250;
 const DEFAULT_UPSTREAM_CONNECT_RETRY_ATTEMPTS: u32 = 2;
 const DEFAULT_UPSTREAM_UNHEALTHY_FAIL_THRESHOLD: u32 = 5;
 const DEFAULT_UPSTREAM_CONNECT_BUDGET_MS: u64 = 3000;
@@ -73,9 +82,7 @@ pub(crate) fn default_replay_check_len() -> usize {
 }

 pub(crate) fn default_replay_window_secs() -> u64 {
-    // Keep replay cache TTL tight by default to reduce replay surface.
-    // Deployments with higher RTT or longer reconnect jitter can override this in config.
-    120
+    1800
 }

 pub(crate) fn default_handshake_timeout() -> u64 {
@@ -87,11 +94,11 @@ pub(crate) fn default_connect_timeout() -> u64 {
 }

 pub(crate) fn default_keepalive() -> u64 {
-    60
+    15
 }

 pub(crate) fn default_ack_timeout() -> u64 {
-    300
+    90
 }
 pub(crate) fn default_me_one_retry() -> u8 {
    12
@@ -153,6 +160,10 @@ pub(crate) fn default_server_max_connections() -> u32 {
    10_000
 }

+pub(crate) fn default_accept_permit_timeout_ms() -> u64 {
+    DEFAULT_ACCEPT_PERMIT_TIMEOUT_MS
+}
+
 pub(crate) fn default_prefer_4() -> u8 {
    4
 }
@@ -377,6 +388,18 @@ pub(crate) fn default_me_warn_rate_limit_ms() -> u64 {
    DEFAULT_ME_WARN_RATE_LIMIT_MS
 }

+pub(crate) fn default_me_route_hybrid_max_wait_ms() -> u64 {
+    DEFAULT_ME_ROUTE_HYBRID_MAX_WAIT_MS
+}
+
+pub(crate) fn default_me_route_blocking_send_timeout_ms() -> u64 {
+    DEFAULT_ME_ROUTE_BLOCKING_SEND_TIMEOUT_MS
+}
+
+pub(crate) fn default_me_c2me_send_timeout_ms() -> u64 {
+    DEFAULT_ME_C2ME_SEND_TIMEOUT_MS
+}
+
 pub(crate) fn default_upstream_connect_retry_attempts() -> u32 {
    DEFAULT_UPSTREAM_CONNECT_RETRY_ATTEMPTS
 }
@@ -458,11 +481,11 @@ pub(crate) fn default_tls_full_cert_ttl_secs() -> u64 {
 }

 pub(crate) fn default_server_hello_delay_min_ms() -> u64 {
-    8
+    0
 }

 pub(crate) fn default_server_hello_delay_max_ms() -> u64 {
-    24
+    0
 }

 pub(crate) fn default_alpn_enforce() -> bool {
@@ -590,10 +613,34 @@ pub(crate) fn default_me_pool_drain_ttl_secs() -> u64 {
    90
 }

+pub(crate) fn default_me_instadrain() -> bool {
+    false
+}
+
 pub(crate) fn default_me_pool_drain_threshold() -> u64 {
    128
 }

+pub(crate) fn default_me_pool_drain_soft_evict_enabled() -> bool {
+    DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_ENABLED
+}
+
+pub(crate) fn default_me_pool_drain_soft_evict_grace_secs() -> u64 {
+    DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_GRACE_SECS
+}
+
+pub(crate) fn default_me_pool_drain_soft_evict_per_writer() -> u8 {
+    DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_PER_WRITER
+}
+
+pub(crate) fn default_me_pool_drain_soft_evict_budget_per_core() -> u16 {
+    DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_BUDGET_PER_CORE
+}
+
+pub(crate) fn default_me_pool_drain_soft_evict_cooldown_ms() -> u64 {
+    DEFAULT_ME_POOL_DRAIN_SOFT_EVICT_COOLDOWN_MS
+}
+
 pub(crate) fn default_me_bind_stale_ttl_secs() -> u64 {
    default_me_pool_drain_ttl_secs()
 }
@@ -37,7 +37,9 @@ use crate::config::{
 };
 use super::load::{LoadedConfig, ProxyConfig};

+const HOT_RELOAD_STABLE_SNAPSHOTS: u8 = 2;
 const HOT_RELOAD_DEBOUNCE: Duration = Duration::from_millis(50);
+const HOT_RELOAD_STABLE_RECHECK: Duration = Duration::from_millis(75);

 // ── Hot fields ────────────────────────────────────────────────────────────────

@@ -54,7 +56,13 @@ pub struct HotFields {
    pub me_reinit_coalesce_window_ms: u64,
    pub hardswap:                bool,
    pub me_pool_drain_ttl_secs:  u64,
+    pub me_instadrain: bool,
    pub me_pool_drain_threshold: u64,
+    pub me_pool_drain_soft_evict_enabled: bool,
+    pub me_pool_drain_soft_evict_grace_secs: u64,
+    pub me_pool_drain_soft_evict_per_writer: u8,
+    pub me_pool_drain_soft_evict_budget_per_core: u16,
+    pub me_pool_drain_soft_evict_cooldown_ms: u64,
    pub me_pool_min_fresh_ratio: f32,
    pub me_reinit_drain_timeout_secs: u64,
    pub me_hardswap_warmup_delay_min_ms: u64,
@@ -136,7 +144,17 @@ impl HotFields {
            me_reinit_coalesce_window_ms: cfg.general.me_reinit_coalesce_window_ms,
            hardswap:                cfg.general.hardswap,
            me_pool_drain_ttl_secs:  cfg.general.me_pool_drain_ttl_secs,
+            me_instadrain: cfg.general.me_instadrain,
            me_pool_drain_threshold: cfg.general.me_pool_drain_threshold,
+            me_pool_drain_soft_evict_enabled: cfg.general.me_pool_drain_soft_evict_enabled,
+            me_pool_drain_soft_evict_grace_secs: cfg.general.me_pool_drain_soft_evict_grace_secs,
+            me_pool_drain_soft_evict_per_writer: cfg.general.me_pool_drain_soft_evict_per_writer,
+            me_pool_drain_soft_evict_budget_per_core: cfg
+                .general
+                .me_pool_drain_soft_evict_budget_per_core,
+            me_pool_drain_soft_evict_cooldown_ms: cfg
+                .general
+                .me_pool_drain_soft_evict_cooldown_ms,
            me_pool_min_fresh_ratio: cfg.general.me_pool_min_fresh_ratio,
            me_reinit_drain_timeout_secs: cfg.general.me_reinit_drain_timeout_secs,
            me_hardswap_warmup_delay_min_ms: cfg.general.me_hardswap_warmup_delay_min_ms,
@@ -328,19 +346,49 @@ impl WatchManifest {
 #[derive(Debug, Default)]
 struct ReloadState {
    applied_snapshot_hash: Option<u64>,
+    candidate_snapshot_hash: Option<u64>,
+    candidate_hits: u8,
 }

 impl ReloadState {
    fn new(applied_snapshot_hash: Option<u64>) -> Self {
-        Self { applied_snapshot_hash }
+        Self {
+            applied_snapshot_hash,
+            candidate_snapshot_hash: None,
+            candidate_hits: 0,
+        }
    }

    fn is_applied(&self, hash: u64) -> bool {
        self.applied_snapshot_hash == Some(hash)
    }

+    fn observe_candidate(&mut self, hash: u64) -> u8 {
+        if self.candidate_snapshot_hash == Some(hash) {
+            self.candidate_hits = self.candidate_hits.saturating_add(1);
+        } else {
+            self.candidate_snapshot_hash = Some(hash);
+            self.candidate_hits = 1;
+        }
+        self.candidate_hits
+    }
+
+    fn reset_candidate(&mut self) {
+        self.candidate_snapshot_hash = None;
+        self.candidate_hits = 0;
+    }
+
    fn mark_applied(&mut self, hash: u64) {
        self.applied_snapshot_hash = Some(hash);
+        self.reset_candidate();
+    }
+
+    fn pending_candidate(&self) -> Option<(u64, u8)> {
+        let hash = self.candidate_snapshot_hash?;
+        if self.candidate_hits < HOT_RELOAD_STABLE_SNAPSHOTS {
+            return Some((hash, self.candidate_hits));
+        }
+        None
    }
 }

@@ -431,7 +479,17 @@ fn overlay_hot_fields(old: &ProxyConfig, new: &ProxyConfig) -> ProxyConfig {
    cfg.general.me_reinit_coalesce_window_ms = new.general.me_reinit_coalesce_window_ms;
    cfg.general.hardswap = new.general.hardswap;
    cfg.general.me_pool_drain_ttl_secs = new.general.me_pool_drain_ttl_secs;
+    cfg.general.me_instadrain = new.general.me_instadrain;
    cfg.general.me_pool_drain_threshold = new.general.me_pool_drain_threshold;
+    cfg.general.me_pool_drain_soft_evict_enabled = new.general.me_pool_drain_soft_evict_enabled;
+    cfg.general.me_pool_drain_soft_evict_grace_secs =
+        new.general.me_pool_drain_soft_evict_grace_secs;
+    cfg.general.me_pool_drain_soft_evict_per_writer =
+        new.general.me_pool_drain_soft_evict_per_writer;
+    cfg.general.me_pool_drain_soft_evict_budget_per_core =
+        new.general.me_pool_drain_soft_evict_budget_per_core;
+    cfg.general.me_pool_drain_soft_evict_cooldown_ms =
+        new.general.me_pool_drain_soft_evict_cooldown_ms;
    cfg.general.me_pool_min_fresh_ratio = new.general.me_pool_min_fresh_ratio;
    cfg.general.me_reinit_drain_timeout_secs = new.general.me_reinit_drain_timeout_secs;
    cfg.general.me_hardswap_warmup_delay_min_ms = new.general.me_hardswap_warmup_delay_min_ms;
@@ -557,6 +615,8 @@ fn warn_non_hot_changes(old: &ProxyConfig, new: &ProxyConfig, non_hot_changed: b
        || old.server.listen_tcp != new.server.listen_tcp
        || old.server.listen_unix_sock != new.server.listen_unix_sock
        || old.server.listen_unix_sock_perm != new.server.listen_unix_sock_perm
+        || old.server.max_connections != new.server.max_connections
+        || old.server.accept_permit_timeout_ms != new.server.accept_permit_timeout_ms
    {
        warned = true;
        warn!("config reload: server listener settings changed; restart required");
@@ -616,6 +676,9 @@ fn warn_non_hot_changes(old: &ProxyConfig, new: &ProxyConfig, non_hot_changed: b
    }
    if old.general.me_route_no_writer_mode != new.general.me_route_no_writer_mode
        || old.general.me_route_no_writer_wait_ms != new.general.me_route_no_writer_wait_ms
+        || old.general.me_route_hybrid_max_wait_ms != new.general.me_route_hybrid_max_wait_ms
+        || old.general.me_route_blocking_send_timeout_ms
+            != new.general.me_route_blocking_send_timeout_ms
        || old.general.me_route_inline_recovery_attempts
            != new.general.me_route_inline_recovery_attempts
        || old.general.me_route_inline_recovery_wait_ms
@@ -624,6 +687,10 @@ fn warn_non_hot_changes(old: &ProxyConfig, new: &ProxyConfig, non_hot_changed: b
        warned = true;
        warn!("config reload: general.me_route_no_writer_* changed; restart required");
    }
+    if old.general.me_c2me_send_timeout_ms != new.general.me_c2me_send_timeout_ms {
+        warned = true;
+        warn!("config reload: general.me_c2me_send_timeout_ms changed; restart required");
+    }
    if old.general.unknown_dc_log_path != new.general.unknown_dc_log_path
        || old.general.unknown_dc_file_log_enabled != new.general.unknown_dc_file_log_enabled
    {
@@ -805,6 +872,12 @@ fn log_changes(
            old_hot.me_pool_drain_ttl_secs, new_hot.me_pool_drain_ttl_secs,
        );
    }
+    if old_hot.me_instadrain != new_hot.me_instadrain {
+        info!(
+            "config reload: me_instadrain: {} → {}",
+            old_hot.me_instadrain, new_hot.me_instadrain,
+        );
+    }

    if old_hot.me_pool_drain_threshold != new_hot.me_pool_drain_threshold {
        info!(
@@ -812,6 +885,25 @@ fn log_changes(
            old_hot.me_pool_drain_threshold, new_hot.me_pool_drain_threshold,
        );
    }
+    if old_hot.me_pool_drain_soft_evict_enabled != new_hot.me_pool_drain_soft_evict_enabled
+        || old_hot.me_pool_drain_soft_evict_grace_secs
+            != new_hot.me_pool_drain_soft_evict_grace_secs
+        || old_hot.me_pool_drain_soft_evict_per_writer
+            != new_hot.me_pool_drain_soft_evict_per_writer
+        || old_hot.me_pool_drain_soft_evict_budget_per_core
+            != new_hot.me_pool_drain_soft_evict_budget_per_core
+        || old_hot.me_pool_drain_soft_evict_cooldown_ms
+            != new_hot.me_pool_drain_soft_evict_cooldown_ms
+    {
+        info!(
+            "config reload: me_pool_drain_soft_evict: enabled={} grace={}s per_writer={} budget_per_core={} cooldown={}ms",
+            new_hot.me_pool_drain_soft_evict_enabled,
+            new_hot.me_pool_drain_soft_evict_grace_secs,
+            new_hot.me_pool_drain_soft_evict_per_writer,
+            new_hot.me_pool_drain_soft_evict_budget_per_core,
+            new_hot.me_pool_drain_soft_evict_cooldown_ms
+        );
+    }

    if (old_hot.me_pool_min_fresh_ratio - new_hot.me_pool_min_fresh_ratio).abs() > f32::EPSILON {
        info!(
@@ -1115,6 +1207,7 @@ fn reload_config(
    let loaded = match ProxyConfig::load_with_metadata(config_path) {
        Ok(loaded) => loaded,
        Err(e) => {
+            reload_state.reset_candidate();
            error!("config reload: failed to parse {:?}: {}", config_path, e);
            return None;
        }
@@ -1127,6 +1220,7 @@ fn reload_config(
    let next_manifest = WatchManifest::from_source_files(&source_files);

    if let Err(e) = new_cfg.validate() {
+        reload_state.reset_candidate();
        error!("config reload: validation failed: {}; keeping old config", e);
        return Some(next_manifest);
    }
@@ -1135,6 +1229,17 @@ fn reload_config(
        return Some(next_manifest);
    }

+    let candidate_hits = reload_state.observe_candidate(rendered_hash);
+    if candidate_hits < HOT_RELOAD_STABLE_SNAPSHOTS {
+        info!(
+            snapshot_hash = rendered_hash,
+            candidate_hits,
+            required_hits = HOT_RELOAD_STABLE_SNAPSHOTS,
+            "config reload: candidate snapshot observed but not stable yet"
+        );
+        return Some(next_manifest);
+    }
+
    let old_cfg = config_tx.borrow().clone();
    let applied_cfg = overlay_hot_fields(&old_cfg, &new_cfg);
    let old_hot = HotFields::from_config(&old_cfg);
@@ -1154,6 +1259,7 @@ fn reload_config(
    if old_hot.dns_overrides != applied_hot.dns_overrides
        && let Err(e) = crate::network::dns_overrides::install_entries(&applied_hot.dns_overrides)
    {
+        reload_state.reset_candidate();
        error!(
            "config reload: invalid network.dns_overrides: {}; keeping old config",
            e
@@ -1174,6 +1280,73 @@ fn reload_config(
    Some(next_manifest)
 }

+async fn reload_with_internal_stable_rechecks(
+    config_path: &PathBuf,
+    config_tx: &watch::Sender<Arc<ProxyConfig>>,
+    log_tx: &watch::Sender<LogLevel>,
+    detected_ip_v4: Option<IpAddr>,
+    detected_ip_v6: Option<IpAddr>,
+    reload_state: &mut ReloadState,
+) -> Option<WatchManifest> {
+    let mut next_manifest = reload_config(
+        config_path,
+        config_tx,
+        log_tx,
+        detected_ip_v4,
+        detected_ip_v6,
+        reload_state,
+    );
+    let mut rechecks_left = HOT_RELOAD_STABLE_SNAPSHOTS.saturating_sub(1);
+
+    while rechecks_left > 0 {
+        let Some((snapshot_hash, candidate_hits)) = reload_state.pending_candidate() else {
+            break;
+        };
+
+        info!(
+            snapshot_hash,
+            candidate_hits,
+            required_hits = HOT_RELOAD_STABLE_SNAPSHOTS,
+            rechecks_left,
+            recheck_delay_ms = HOT_RELOAD_STABLE_RECHECK.as_millis(),
+            "config reload: scheduling internal stable recheck"
+        );
+        tokio::time::sleep(HOT_RELOAD_STABLE_RECHECK).await;
+
+        let recheck_manifest = reload_config(
+            config_path,
+            config_tx,
+            log_tx,
+            detected_ip_v4,
+            detected_ip_v6,
+            reload_state,
+        );
+        if recheck_manifest.is_some() {
+            next_manifest = recheck_manifest;
+        }
+
+        if reload_state.is_applied(snapshot_hash) {
+            info!(
+                snapshot_hash,
+                "config reload: applied after internal stable recheck"
+            );
+            break;
+        }
+
+        if reload_state.pending_candidate().is_none() {
+            info!(
+                snapshot_hash,
+                "config reload: internal stable recheck aborted"
+            );
+            break;
+        }
+
+        rechecks_left = rechecks_left.saturating_sub(1);
+    }
+
+    next_manifest
+}
+
 // ── Public API ────────────────────────────────────────────────────────────────

 /// Spawn the hot-reload watcher task.
@@ -1297,28 +1470,16 @@ pub fn spawn_config_watcher(
            tokio::time::sleep(HOT_RELOAD_DEBOUNCE).await;
            while notify_rx.try_recv().is_ok() {}

-            let mut next_manifest = reload_config(
+            if let Some(next_manifest) = reload_with_internal_stable_rechecks(
                &config_path,
                &config_tx,
                &log_tx,
                detected_ip_v4,
                detected_ip_v6,
                &mut reload_state,
-            );
-            if next_manifest.is_none() {
-                tokio::time::sleep(HOT_RELOAD_DEBOUNCE).await;
-                while notify_rx.try_recv().is_ok() {}
-                next_manifest = reload_config(
-                    &config_path,
-                    &config_tx,
-                    &log_tx,
-                    detected_ip_v4,
-                    detected_ip_v6,
-                    &mut reload_state,
-                );
-            }
-
-            if let Some(next_manifest) = next_manifest {
+            )
+            .await
+            {
                apply_watch_manifest(
                    inotify_watcher.as_mut(),
                    poll_watcher.as_mut(),
@@ -1443,7 +1604,7 @@ mod tests {
    }

    #[test]
-    fn reload_applies_hot_change_on_first_observed_snapshot() {
+    fn reload_requires_stable_snapshot_before_hot_apply() {
        let initial_tag = "11111111111111111111111111111111";
        let final_tag = "22222222222222222222222222222222";
        let path = temp_config_path("telemt_hot_reload_stable");
@@ -1455,13 +1616,55 @@ mod tests {
        let (log_tx, _log_rx) = watch::channel(initial_cfg.general.log_level.clone());
        let mut reload_state = ReloadState::new(Some(initial_hash));

+        write_reload_config(&path, None, None);
+        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();
+        assert_eq!(
+            config_tx.borrow().general.ad_tag.as_deref(),
+            Some(initial_tag)
+        );
+
        write_reload_config(&path, Some(final_tag), None);
+        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();
+        assert_eq!(
+            config_tx.borrow().general.ad_tag.as_deref(),
+            Some(initial_tag)
+        );
+
        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();
        assert_eq!(config_tx.borrow().general.ad_tag.as_deref(), Some(final_tag));

        let _ = std::fs::remove_file(path);
    }

+    #[tokio::test]
+    async fn reload_cycle_applies_after_single_external_event() {
+        let initial_tag = "10101010101010101010101010101010";
+        let final_tag = "20202020202020202020202020202020";
+        let path = temp_config_path("telemt_hot_reload_single_event");
+
+        write_reload_config(&path, Some(initial_tag), None);
+        let initial_cfg = Arc::new(ProxyConfig::load(&path).unwrap());
+        let initial_hash = ProxyConfig::load_with_metadata(&path).unwrap().rendered_hash;
+        let (config_tx, _config_rx) = watch::channel(initial_cfg.clone());
+        let (log_tx, _log_rx) = watch::channel(initial_cfg.general.log_level.clone());
+        let mut reload_state = ReloadState::new(Some(initial_hash));
+
+        write_reload_config(&path, Some(final_tag), None);
+        reload_with_internal_stable_rechecks(
+            &path,
+            &config_tx,
+            &log_tx,
+            None,
+            None,
+            &mut reload_state,
+        )
+        .await
+        .unwrap();
+
+        assert_eq!(config_tx.borrow().general.ad_tag.as_deref(), Some(final_tag));
+        let _ = std::fs::remove_file(path);
+    }
+
    #[test]
    fn reload_keeps_hot_apply_when_non_hot_fields_change() {
        let initial_tag = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
@@ -1477,6 +1680,7 @@ mod tests {

        write_reload_config(&path, Some(final_tag), Some(initial_cfg.server.port + 1));
        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();
+        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();

        let applied = config_tx.borrow().clone();
        assert_eq!(applied.general.ad_tag.as_deref(), Some(final_tag));
@@ -1484,31 +1688,4 @@ mod tests {

        let _ = std::fs::remove_file(path);
    }
-
-    #[test]
-    fn reload_recovers_after_parse_error_on_next_attempt() {
-        let initial_tag = "cccccccccccccccccccccccccccccccc";
-        let final_tag = "dddddddddddddddddddddddddddddddd";
-        let path = temp_config_path("telemt_hot_reload_parse_recovery");
-
-        write_reload_config(&path, Some(initial_tag), None);
-        let initial_cfg = Arc::new(ProxyConfig::load(&path).unwrap());
-        let initial_hash = ProxyConfig::load_with_metadata(&path).unwrap().rendered_hash;
-        let (config_tx, _config_rx) = watch::channel(initial_cfg.clone());
-        let (log_tx, _log_rx) = watch::channel(initial_cfg.general.log_level.clone());
-        let mut reload_state = ReloadState::new(Some(initial_hash));
-
-        std::fs::write(&path, "[access.users\nuser = \"broken\"\n").unwrap();
-        assert!(reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).is_none());
-        assert_eq!(
-            config_tx.borrow().general.ad_tag.as_deref(),
-            Some(initial_tag)
-        );
-
-        write_reload_config(&path, Some(final_tag), None);
-        reload_config(&path, &config_tx, &log_tx, None, None, &mut reload_state).unwrap();
-        assert_eq!(config_tx.borrow().general.ad_tag.as_deref(), Some(final_tag));
-
-        let _ = std::fs::remove_file(path);
-    }
 }
@@ -346,6 +346,12 @@ impl ProxyConfig {
            ));
        }

+        if config.general.me_c2me_send_timeout_ms > 60_000 {
+            return Err(ProxyError::Config(
+                "general.me_c2me_send_timeout_ms must be within [0, 60000]".to_string(),
+            ));
+        }
+
        if config.general.me_reader_route_data_wait_ms > 20 {
            return Err(ProxyError::Config(
                "general.me_reader_route_data_wait_ms must be within [0, 20]".to_string(),
@@ -406,6 +412,35 @@ impl ProxyConfig {
            ));
        }

+        if config.general.me_pool_drain_soft_evict_grace_secs > 3600 {
+            return Err(ProxyError::Config(
+                "general.me_pool_drain_soft_evict_grace_secs must be within [0, 3600]".to_string(),
+            ));
+        }
+
+        if config.general.me_pool_drain_soft_evict_per_writer == 0
+            || config.general.me_pool_drain_soft_evict_per_writer > 16
+        {
+            return Err(ProxyError::Config(
+                "general.me_pool_drain_soft_evict_per_writer must be within [1, 16]".to_string(),
+            ));
+        }
+
+        if config.general.me_pool_drain_soft_evict_budget_per_core == 0
+            || config.general.me_pool_drain_soft_evict_budget_per_core > 64
+        {
+            return Err(ProxyError::Config(
+                "general.me_pool_drain_soft_evict_budget_per_core must be within [1, 64]"
+                    .to_string(),
+            ));
+        }
+
+        if config.general.me_pool_drain_soft_evict_cooldown_ms == 0 {
+            return Err(ProxyError::Config(
+                "general.me_pool_drain_soft_evict_cooldown_ms must be > 0".to_string(),
+            ));
+        }
+
        if config.access.user_max_unique_ips_window_secs == 0 {
            return Err(ProxyError::Config(
                "access.user_max_unique_ips_window_secs must be > 0".to_string(),
@@ -577,6 +612,11 @@ impl ProxyConfig {
                "general.me_route_backpressure_base_timeout_ms must be > 0".to_string(),
            ));
        }
+        if config.general.me_route_backpressure_base_timeout_ms > 5000 {
+            return Err(ProxyError::Config(
+                "general.me_route_backpressure_base_timeout_ms must be within [1, 5000]".to_string(),
+            ));
+        }

        if config.general.me_route_backpressure_high_timeout_ms
            < config.general.me_route_backpressure_base_timeout_ms
@@ -585,6 +625,11 @@ impl ProxyConfig {
                "general.me_route_backpressure_high_timeout_ms must be >= general.me_route_backpressure_base_timeout_ms".to_string(),
            ));
        }
+        if config.general.me_route_backpressure_high_timeout_ms > 5000 {
+            return Err(ProxyError::Config(
+                "general.me_route_backpressure_high_timeout_ms must be within [1, 5000]".to_string(),
+            ));
+        }

        if !(1..=100).contains(&config.general.me_route_backpressure_high_watermark_pct) {
            return Err(ProxyError::Config(
@@ -598,6 +643,18 @@ impl ProxyConfig {
            ));
        }

+        if !(50..=60_000).contains(&config.general.me_route_hybrid_max_wait_ms) {
+            return Err(ProxyError::Config(
+                "general.me_route_hybrid_max_wait_ms must be within [50, 60000]".to_string(),
+            ));
+        }
+
+        if config.general.me_route_blocking_send_timeout_ms > 5000 {
+            return Err(ProxyError::Config(
+                "general.me_route_blocking_send_timeout_ms must be within [0, 5000]".to_string(),
+            ));
+        }
+
        if !(2..=4).contains(&config.general.me_writer_pick_sample_size) {
            return Err(ProxyError::Config(
                "general.me_writer_pick_sample_size must be within [2, 4]".to_string(),
@@ -658,6 +715,12 @@ impl ProxyConfig {
            ));
        }

+        if config.server.accept_permit_timeout_ms > 60_000 {
+            return Err(ProxyError::Config(
+                "server.accept_permit_timeout_ms must be within [0, 60000]".to_string(),
+            ));
+        }
+
        if config.general.effective_me_pool_force_close_secs() > 0
            && config.general.effective_me_pool_force_close_secs()
                < config.general.me_pool_drain_ttl_secs
@@ -1571,6 +1634,47 @@ mod tests {
        let _ = std::fs::remove_file(path_valid);
    }

+    #[test]
+    fn me_route_backpressure_base_timeout_ms_out_of_range_is_rejected() {
+        let toml = r#"
+            [general]
+            me_route_backpressure_base_timeout_ms = 5001
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_me_route_backpressure_base_timeout_ms_out_of_range_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let err = ProxyConfig::load(&path).unwrap_err().to_string();
+        assert!(err.contains("general.me_route_backpressure_base_timeout_ms must be within [1, 5000]"));
+        let _ = std::fs::remove_file(path);
+    }
+
+    #[test]
+    fn me_route_backpressure_high_timeout_ms_out_of_range_is_rejected() {
+        let toml = r#"
+            [general]
+            me_route_backpressure_base_timeout_ms = 100
+            me_route_backpressure_high_timeout_ms = 5001
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_me_route_backpressure_high_timeout_ms_out_of_range_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let err = ProxyConfig::load(&path).unwrap_err().to_string();
+        assert!(err.contains("general.me_route_backpressure_high_timeout_ms must be within [1, 5000]"));
+        let _ = std::fs::remove_file(path);
+    }
+
    #[test]
    fn me_route_no_writer_wait_ms_out_of_range_is_rejected() {
        let toml = r#"
@@ -462,6 +462,11 @@ pub struct GeneralConfig {
    #[serde(default = "default_me_c2me_channel_capacity")]
    pub me_c2me_channel_capacity: usize,

+    /// Maximum wait in milliseconds for enqueueing C2ME commands when the queue is full.
+    /// `0` keeps legacy unbounded wait behavior.
+    #[serde(default = "default_me_c2me_send_timeout_ms")]
+    pub me_c2me_send_timeout_ms: u64,
+
    /// Bounded wait in milliseconds for routing ME DATA to per-connection queue.
    /// `0` keeps legacy no-wait behavior.
    #[serde(default = "default_me_reader_route_data_wait_ms")]
@@ -716,6 +721,15 @@ pub struct GeneralConfig {
    #[serde(default = "default_me_route_no_writer_wait_ms")]
    pub me_route_no_writer_wait_ms: u64,

+    /// Maximum cumulative wait in milliseconds for hybrid no-writer mode before failfast.
+    #[serde(default = "default_me_route_hybrid_max_wait_ms")]
+    pub me_route_hybrid_max_wait_ms: u64,
+
+    /// Maximum wait in milliseconds for blocking ME writer channel send fallback.
+    /// `0` keeps legacy unbounded wait behavior.
+    #[serde(default = "default_me_route_blocking_send_timeout_ms")]
+    pub me_route_blocking_send_timeout_ms: u64,
+
    /// Number of inline recovery attempts in legacy mode.
    #[serde(default = "default_me_route_inline_recovery_attempts")]
    pub me_route_inline_recovery_attempts: u32,
@@ -798,11 +812,35 @@ pub struct GeneralConfig {
    #[serde(default = "default_me_pool_drain_ttl_secs")]
    pub me_pool_drain_ttl_secs: u64,

+    /// Force-remove any draining writer on the next cleanup tick, regardless of age/deadline.
+    #[serde(default = "default_me_instadrain")]
+    pub me_instadrain: bool,
+
    /// Maximum allowed number of draining ME writers before oldest ones are force-closed in batches.
    /// Set to 0 to disable threshold-based draining cleanup and keep timeout-only behavior.
    #[serde(default = "default_me_pool_drain_threshold")]
    pub me_pool_drain_threshold: u64,

+    /// Enable staged client eviction for draining ME writers that remain non-empty past TTL.
+    #[serde(default = "default_me_pool_drain_soft_evict_enabled")]
+    pub me_pool_drain_soft_evict_enabled: bool,
+
+    /// Extra grace in seconds after drain TTL before soft-eviction stage starts.
+    #[serde(default = "default_me_pool_drain_soft_evict_grace_secs")]
+    pub me_pool_drain_soft_evict_grace_secs: u64,
+
+    /// Maximum number of client sessions to evict from one draining writer per health tick.
+    #[serde(default = "default_me_pool_drain_soft_evict_per_writer")]
+    pub me_pool_drain_soft_evict_per_writer: u8,
+
+    /// Soft-eviction budget per CPU core for one health tick.
+    #[serde(default = "default_me_pool_drain_soft_evict_budget_per_core")]
+    pub me_pool_drain_soft_evict_budget_per_core: u16,
+
+    /// Cooldown for repetitive soft-eviction on the same writer in milliseconds.
+    #[serde(default = "default_me_pool_drain_soft_evict_cooldown_ms")]
+    pub me_pool_drain_soft_evict_cooldown_ms: u64,
+
    /// Policy for new binds on stale draining writers.
    #[serde(default)]
    pub me_bind_stale_mode: MeBindStaleMode,
@@ -901,6 +939,7 @@ impl Default for GeneralConfig {
            me_writer_cmd_channel_capacity: default_me_writer_cmd_channel_capacity(),
            me_route_channel_capacity: default_me_route_channel_capacity(),
            me_c2me_channel_capacity: default_me_c2me_channel_capacity(),
+            me_c2me_send_timeout_ms: default_me_c2me_send_timeout_ms(),
            me_reader_route_data_wait_ms: default_me_reader_route_data_wait_ms(),
            me_d2c_flush_batch_max_frames: default_me_d2c_flush_batch_max_frames(),
            me_d2c_flush_batch_max_bytes: default_me_d2c_flush_batch_max_bytes(),
@@ -955,6 +994,8 @@ impl Default for GeneralConfig {
            me_warn_rate_limit_ms: default_me_warn_rate_limit_ms(),
            me_route_no_writer_mode: MeRouteNoWriterMode::default(),
            me_route_no_writer_wait_ms: default_me_route_no_writer_wait_ms(),
+            me_route_hybrid_max_wait_ms: default_me_route_hybrid_max_wait_ms(),
+            me_route_blocking_send_timeout_ms: default_me_route_blocking_send_timeout_ms(),
            me_route_inline_recovery_attempts: default_me_route_inline_recovery_attempts(),
            me_route_inline_recovery_wait_ms: default_me_route_inline_recovery_wait_ms(),
            links: LinksConfig::default(),
@@ -983,7 +1024,15 @@ impl Default for GeneralConfig {
            me_secret_atomic_snapshot: default_me_secret_atomic_snapshot(),
            proxy_secret_len_max: default_proxy_secret_len_max(),
            me_pool_drain_ttl_secs: default_me_pool_drain_ttl_secs(),
+            me_instadrain: default_me_instadrain(),
            me_pool_drain_threshold: default_me_pool_drain_threshold(),
+            me_pool_drain_soft_evict_enabled: default_me_pool_drain_soft_evict_enabled(),
+            me_pool_drain_soft_evict_grace_secs: default_me_pool_drain_soft_evict_grace_secs(),
+            me_pool_drain_soft_evict_per_writer: default_me_pool_drain_soft_evict_per_writer(),
+            me_pool_drain_soft_evict_budget_per_core:
+                default_me_pool_drain_soft_evict_budget_per_core(),
+            me_pool_drain_soft_evict_cooldown_ms:
+                default_me_pool_drain_soft_evict_cooldown_ms(),
            me_bind_stale_mode: MeBindStaleMode::default(),
            me_bind_stale_ttl_secs: default_me_bind_stale_ttl_secs(),
            me_pool_min_fresh_ratio: default_me_pool_min_fresh_ratio(),
@@ -1156,13 +1205,6 @@ pub struct ServerConfig {
    #[serde(default = "default_proxy_protocol_header_timeout_ms")]
    pub proxy_protocol_header_timeout_ms: u64,

-    /// Trusted source CIDRs allowed to send incoming PROXY protocol headers.
-    ///
-    /// When non-empty, connections from addresses outside this allowlist are
-    /// rejected before `src_addr` is applied.
-    #[serde(default)]
-    pub proxy_protocol_trusted_cidrs: Vec<IpNetwork>,
-
    /// Port for the Prometheus-compatible metrics endpoint.
    /// Enables metrics when set; binds on all interfaces (dual-stack) by default.
    #[serde(default)]
@@ -1187,6 +1229,11 @@ pub struct ServerConfig {
    /// 0 means unlimited.
    #[serde(default = "default_server_max_connections")]
    pub max_connections: u32,
+
+    /// Maximum wait in milliseconds while acquiring a connection slot permit.
+    /// `0` keeps legacy unbounded wait behavior.
+    #[serde(default = "default_accept_permit_timeout_ms")]
+    pub accept_permit_timeout_ms: u64,
 }

 impl Default for ServerConfig {
@@ -1200,13 +1247,13 @@ impl Default for ServerConfig {
            listen_tcp: None,
            proxy_protocol: false,
            proxy_protocol_header_timeout_ms: default_proxy_protocol_header_timeout_ms(),
-            proxy_protocol_trusted_cidrs: Vec::new(),
            metrics_port: None,
            metrics_listen: None,
            metrics_whitelist: default_metrics_whitelist(),
            api: ApiConfig::default(),
            listeners: Vec::new(),
            max_connections: default_server_max_connections(),
+            accept_permit_timeout_ms: default_accept_permit_timeout_ms(),
        }
    }
 }
@@ -7,9 +7,8 @@ use std::net::IpAddr;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::time::{Duration, Instant};
-use std::sync::Mutex;

-use tokio::sync::{Mutex as AsyncMutex, RwLock};
+use tokio::sync::RwLock;

 use crate::config::UserMaxUniqueIpsMode;

@@ -22,8 +21,6 @@ pub struct UserIpTracker {
    limit_mode: Arc<RwLock<UserMaxUniqueIpsMode>>,
    limit_window: Arc<RwLock<Duration>>,
    last_compact_epoch_secs: Arc<AtomicU64>,
-    pub(crate) cleanup_queue: Arc<Mutex<Vec<(String, IpAddr)>>>,
-    cleanup_drain_lock: Arc<AsyncMutex<()>>,
 }

 impl UserIpTracker {
@@ -36,67 +33,6 @@ impl UserIpTracker {
            limit_mode: Arc::new(RwLock::new(UserMaxUniqueIpsMode::ActiveWindow)),
            limit_window: Arc::new(RwLock::new(Duration::from_secs(30))),
            last_compact_epoch_secs: Arc::new(AtomicU64::new(0)),
-            cleanup_queue: Arc::new(Mutex::new(Vec::new())),
-            cleanup_drain_lock: Arc::new(AsyncMutex::new(())),
-        }
-    }
-
-
-    pub fn enqueue_cleanup(&self, user: String, ip: IpAddr) {
-        match self.cleanup_queue.lock() {
-            Ok(mut queue) => queue.push((user, ip)),
-            Err(poisoned) => {
-                let mut queue = poisoned.into_inner();
-                queue.push((user.clone(), ip));
-                self.cleanup_queue.clear_poison();
-                tracing::warn!(
-                    "UserIpTracker cleanup_queue lock poisoned; recovered and enqueued IP cleanup for {} ({})",
-                    user,
-                    ip
-                );
-            }
-        }
-    }
-
-    pub(crate) async fn drain_cleanup_queue(&self) {
-        // Serialize queue draining and active-IP mutation so check-and-add cannot
-        // observe stale active entries that are already queued for removal.
-        let _drain_guard = self.cleanup_drain_lock.lock().await;
-        let to_remove = {
-            match self.cleanup_queue.lock() {
-                Ok(mut queue) => {
-                    if queue.is_empty() {
-                        return;
-                    }
-                    std::mem::take(&mut *queue)
-                }
-                Err(poisoned) => {
-                    let mut queue = poisoned.into_inner();
-                    if queue.is_empty() {
-                        self.cleanup_queue.clear_poison();
-                        return;
-                    }
-                    let drained = std::mem::take(&mut *queue);
-                    self.cleanup_queue.clear_poison();
-                    drained
-                }
-            }
-        };
-
-        let mut active_ips = self.active_ips.write().await;
-        for (user, ip) in to_remove {
-            if let Some(user_ips) = active_ips.get_mut(&user) {
-                if let Some(count) = user_ips.get_mut(&ip) {
-                    if *count > 1 {
-                        *count -= 1;
-                    } else {
-                        user_ips.remove(&ip);
-                    }
-                }
-                if user_ips.is_empty() {
-                    active_ips.remove(&user);
-                }
-            }
        }
    }

@@ -182,7 +118,6 @@ impl UserIpTracker {
    }

    pub async fn check_and_add(&self, username: &str, ip: IpAddr) -> Result<(), String> {
-        self.drain_cleanup_queue().await;
        self.maybe_compact_empty_users().await;
        let default_max_ips = *self.default_max_ips.read().await;
        let limit = {
@@ -259,7 +194,6 @@ impl UserIpTracker {
    }

    pub async fn get_recent_counts_for_users(&self, users: &[String]) -> HashMap<String, usize> {
-        self.drain_cleanup_queue().await;
        let window = *self.limit_window.read().await;
        let now = Instant::now();
        let recent_ips = self.recent_ips.read().await;
@@ -280,7 +214,6 @@ impl UserIpTracker {
    }

    pub async fn get_active_ips_for_users(&self, users: &[String]) -> HashMap<String, Vec<IpAddr>> {
-        self.drain_cleanup_queue().await;
        let active_ips = self.active_ips.read().await;
        let mut out = HashMap::with_capacity(users.len());
        for user in users {
@@ -295,7 +228,6 @@ impl UserIpTracker {
    }

    pub async fn get_recent_ips_for_users(&self, users: &[String]) -> HashMap<String, Vec<IpAddr>> {
-        self.drain_cleanup_queue().await;
        let window = *self.limit_window.read().await;
        let now = Instant::now();
        let recent_ips = self.recent_ips.read().await;
@@ -318,13 +250,11 @@ impl UserIpTracker {
    }

    pub async fn get_active_ip_count(&self, username: &str) -> usize {
-        self.drain_cleanup_queue().await;
        let active_ips = self.active_ips.read().await;
        active_ips.get(username).map(|ips| ips.len()).unwrap_or(0)
    }

    pub async fn get_active_ips(&self, username: &str) -> Vec<IpAddr> {
-        self.drain_cleanup_queue().await;
        let active_ips = self.active_ips.read().await;
        active_ips
            .get(username)
@@ -333,7 +263,6 @@ impl UserIpTracker {
    }

    pub async fn get_stats(&self) -> Vec<(String, usize, usize)> {
-        self.drain_cleanup_queue().await;
        let active_ips = self.active_ips.read().await;
        let max_ips = self.max_ips.read().await;
        let default_max_ips = *self.default_max_ips.read().await;
@@ -372,7 +301,6 @@ impl UserIpTracker {
    }

    pub async fn is_ip_active(&self, username: &str, ip: IpAddr) -> bool {
-        self.drain_cleanup_queue().await;
        let active_ips = self.active_ips.read().await;
        active_ips
            .get(username)
@@ -448,172 +448,3 @@ async fn concurrent_reconnect_and_disconnect_preserves_non_negative_counts() {

    assert!(tracker.get_active_ip_count("cc").await <= 8);
 }
-
-#[tokio::test]
-async fn enqueue_cleanup_recovers_from_poisoned_mutex() {
-    let tracker = UserIpTracker::new();
-    let ip = ip_from_idx(99);
-    
-    // Poison the lock by panicking while holding it
-    let result = std::panic::catch_unwind(|| {
-        let _guard = tracker.cleanup_queue.lock().unwrap();
-        panic!("Intentional poison panic");
-    });
-    assert!(result.is_err(), "Expected panic to poison mutex");
-    
-    // Attempt to enqueue anyway; should hit the poison catch arm and still insert
-    tracker.enqueue_cleanup("poison-user".to_string(), ip);
-    
-    tracker.drain_cleanup_queue().await;
-    
-    assert_eq!(tracker.get_active_ip_count("poison-user").await, 0);
-}
-
-#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
-async fn mass_reconnect_sync_cleanup_prevents_temporary_reservation_bloat() {
-    // Tests that synchronous M-01 drop mechanism protects against starvation
-    let tracker = Arc::new(UserIpTracker::new());
-    tracker.set_user_limit("mass", 5).await;
-    
-    let ip = ip_from_idx(42);
-    let mut join_handles = Vec::new();
-
-    // 10,000 rapid concurrent requests hitting the same IP limit
-    for _ in 0..10_000 {
-        let tracker_clone = tracker.clone();
-        join_handles.push(tokio::spawn(async move {
-            if tracker_clone.check_and_add("mass", ip).await.is_ok() {
-                // Instantly enqueue cleanup, simulating synchronous reservation drop
-                tracker_clone.enqueue_cleanup("mass".to_string(), ip);
-                // The next caller will drain it before acquiring again
-            }
-        }));
-    }
-
-    for handle in join_handles {
-        let _ = handle.await;
-    }
-
-    // Force flush
-    tracker.drain_cleanup_queue().await;
-    assert_eq!(tracker.get_active_ip_count("mass").await, 0, "No leaked footprints");
-}
-
-#[tokio::test]
-async fn adversarial_drain_cleanup_queue_race_does_not_cause_false_rejections() {
-    // Regression guard: concurrent cleanup draining must not produce false
-    // limit denials for a new IP when the previous IP is already queued.
-    let tracker = Arc::new(UserIpTracker::new());
-    tracker.set_user_limit("racer", 1).await;
-    let ip1 = ip_from_idx(1);
-    let ip2 = ip_from_idx(2);
-
-    // Initial state: add ip1
-    tracker.check_and_add("racer", ip1).await.unwrap();
-
-    // User disconnects from ip1, queuing it
-    tracker.enqueue_cleanup("racer".to_string(), ip1);
-
-    let mut saw_false_rejection = false;
-    for _ in 0..100 {
-        // Queue cleanup then race explicit drain and check-and-add on the alternative IP.
-        tracker.enqueue_cleanup("racer".to_string(), ip1);
-        let tracker_a = tracker.clone();
-        let tracker_b = tracker.clone();
-
-        let drain_handle = tokio::spawn(async move {
-            tracker_a.drain_cleanup_queue().await;
-        });
-        let handle = tokio::spawn(async move {
-            tracker_b.check_and_add("racer", ip2).await
-        });
-
-        drain_handle.await.unwrap();
-        let res = handle.await.unwrap();
-        if res.is_err() {
-            saw_false_rejection = true;
-            break;
-        }
-
-        // Restore baseline for next iteration.
-        tracker.remove_ip("racer", ip2).await;
-        tracker.check_and_add("racer", ip1).await.unwrap();
-    }
-
-    assert!(
-        !saw_false_rejection,
-        "Concurrent cleanup draining must not cause false-positive IP denials"
-    );
-}
-
-#[tokio::test]
-async fn poisoned_cleanup_queue_still_releases_slot_for_next_ip() {
-    let tracker = UserIpTracker::new();
-    tracker.set_user_limit("poison-slot", 1).await;
-    let ip1 = ip_from_idx(7001);
-    let ip2 = ip_from_idx(7002);
-
-    tracker.check_and_add("poison-slot", ip1).await.unwrap();
-
-    // Poison the queue lock as an adversarial condition.
-    let _ = std::panic::catch_unwind(|| {
-        let _guard = tracker.cleanup_queue.lock().unwrap();
-        panic!("intentional queue poison");
-    });
-
-    // Disconnect path must still queue cleanup so the next IP can be admitted.
-    tracker.enqueue_cleanup("poison-slot".to_string(), ip1);
-    let admitted = tracker.check_and_add("poison-slot", ip2).await;
-    assert!(
-        admitted.is_ok(),
-        "cleanup queue poison must not permanently block slot release for the next IP"
-    );
-}
-
-#[tokio::test]
-async fn duplicate_cleanup_entries_do_not_break_future_admission() {
-    let tracker = UserIpTracker::new();
-    tracker.set_user_limit("dup-cleanup", 1).await;
-    let ip1 = ip_from_idx(7101);
-    let ip2 = ip_from_idx(7102);
-
-    tracker.check_and_add("dup-cleanup", ip1).await.unwrap();
-    tracker.enqueue_cleanup("dup-cleanup".to_string(), ip1);
-    tracker.enqueue_cleanup("dup-cleanup".to_string(), ip1);
-    tracker.enqueue_cleanup("dup-cleanup".to_string(), ip1);
-
-    tracker.drain_cleanup_queue().await;
-
-    assert_eq!(tracker.get_active_ip_count("dup-cleanup").await, 0);
-    assert!(
-        tracker.check_and_add("dup-cleanup", ip2).await.is_ok(),
-        "extra queued cleanup entries must not leave user stuck in denied state"
-    );
-}
-
-#[tokio::test]
-async fn stress_repeated_queue_poison_recovery_preserves_admission_progress() {
-    let tracker = UserIpTracker::new();
-    tracker.set_user_limit("poison-stress", 1).await;
-    let ip_primary = ip_from_idx(7201);
-    let ip_alt = ip_from_idx(7202);
-
-    tracker.check_and_add("poison-stress", ip_primary).await.unwrap();
-
-    for _ in 0..64 {
-        let _ = std::panic::catch_unwind(|| {
-            let _guard = tracker.cleanup_queue.lock().unwrap();
-            panic!("intentional queue poison in stress loop");
-        });
-
-        tracker.enqueue_cleanup("poison-stress".to_string(), ip_primary);
-
-        assert!(
-            tracker.check_and_add("poison-stress", ip_alt).await.is_ok(),
-            "poison recovery must preserve admission progress under repeated queue poisoning"
-        );
-
-        tracker.remove_ip("poison-stress", ip_alt).await;
-        tracker.check_and_add("poison-stress", ip_primary).await.unwrap();
-    }
-}
@@ -10,16 +10,6 @@ use crate::transport::middle_proxy::{
    ProxyConfigData, fetch_proxy_config_with_raw, load_proxy_config_cache, save_proxy_config_cache,
 };

-pub(crate) fn resolve_runtime_config_path(config_path_cli: &str, startup_cwd: &std::path::Path) -> PathBuf {
-    let raw = PathBuf::from(config_path_cli);
-    let absolute = if raw.is_absolute() {
-        raw
-    } else {
-        startup_cwd.join(raw)
-    };
-    absolute.canonicalize().unwrap_or(absolute)
-}
-
 pub(crate) fn parse_cli() -> (String, Option<PathBuf>, bool, Option<String>) {
    let mut config_path = "config.toml".to_string();
    let mut data_path: Option<PathBuf> = None;
@@ -106,44 +96,6 @@ pub(crate) fn parse_cli() -> (String, Option<PathBuf>, bool, Option<String>) {
    (config_path, data_path, silent, log_level)
 }

-#[cfg(test)]
-mod tests {
-    use super::resolve_runtime_config_path;
-
-    #[test]
-    fn resolve_runtime_config_path_anchors_relative_to_startup_cwd() {
-        let nonce = std::time::SystemTime::now()
-            .duration_since(std::time::UNIX_EPOCH)
-            .unwrap()
-            .as_nanos();
-        let startup_cwd = std::env::temp_dir().join(format!("telemt_cfg_path_{nonce}"));
-        std::fs::create_dir_all(&startup_cwd).unwrap();
-        let target = startup_cwd.join("config.toml");
-        std::fs::write(&target, " ").unwrap();
-
-        let resolved = resolve_runtime_config_path("config.toml", &startup_cwd);
-        assert_eq!(resolved, target.canonicalize().unwrap());
-
-        let _ = std::fs::remove_file(&target);
-        let _ = std::fs::remove_dir(&startup_cwd);
-    }
-
-    #[test]
-    fn resolve_runtime_config_path_keeps_absolute_for_missing_file() {
-        let nonce = std::time::SystemTime::now()
-            .duration_since(std::time::UNIX_EPOCH)
-            .unwrap()
-            .as_nanos();
-        let startup_cwd = std::env::temp_dir().join(format!("telemt_cfg_path_missing_{nonce}"));
-        std::fs::create_dir_all(&startup_cwd).unwrap();
-
-        let resolved = resolve_runtime_config_path("missing.toml", &startup_cwd);
-        assert_eq!(resolved, startup_cwd.join("missing.toml"));
-
-        let _ = std::fs::remove_dir(&startup_cwd);
-    }
-}
-
 pub(crate) fn print_proxy_links(host: &str, port: u16, config: &ProxyConfig) {
    info!(target: "telemt::links", "--- Proxy Links ({}) ---", host);
    for user_name in config.general.links.show.resolve_users(&config.access.users) {
@@ -253,6 +205,7 @@ pub(crate) fn format_uptime(total_secs: u64) -> String {
    format!("{} / {} seconds", parts.join(", "), total_secs)
 }

+#[allow(dead_code)]
 pub(crate) async fn wait_until_admission_open(admission_rx: &mut watch::Receiver<bool>) -> bool {
    loop {
        if *admission_rx.borrow() {
@@ -24,7 +24,7 @@ use crate::transport::{
    ListenOptions, UpstreamManager, create_listener, find_listener_processes,
 };

-use super::helpers::{is_expected_handshake_eof, print_proxy_links, wait_until_admission_open};
+use super::helpers::{is_expected_handshake_eof, print_proxy_links};

 pub(crate) struct BoundListeners {
    pub(crate) listeners: Vec<(TcpListener, bool)>,
@@ -195,7 +195,7 @@ pub(crate) async fn bind_listeners(
        has_unix_listener = true;

        let mut config_rx_unix: watch::Receiver<Arc<ProxyConfig>> = config_rx.clone();
-        let mut admission_rx_unix = admission_rx.clone();
+        let admission_rx_unix = admission_rx.clone();
        let stats = stats.clone();
        let upstream_manager = upstream_manager.clone();
        let replay_checker = replay_checker.clone();
@@ -212,17 +212,44 @@ pub(crate) async fn bind_listeners(
            let unix_conn_counter = Arc::new(std::sync::atomic::AtomicU64::new(1));

            loop {
-                if !wait_until_admission_open(&mut admission_rx_unix).await {
-                    warn!("Conditional-admission gate channel closed for unix listener");
-                    break;
-                }
                match unix_listener.accept().await {
                    Ok((stream, _)) => {
-                        let permit = match max_connections_unix.clone().acquire_owned().await {
-                            Ok(permit) => permit,
-                            Err(_) => {
-                                error!("Connection limiter is closed");
-                                break;
+                        if !*admission_rx_unix.borrow() {
+                            drop(stream);
+                            continue;
+                        }
+                        let accept_permit_timeout_ms = config_rx_unix
+                            .borrow()
+                            .server
+                            .accept_permit_timeout_ms;
+                        let permit = if accept_permit_timeout_ms == 0 {
+                            match max_connections_unix.clone().acquire_owned().await {
+                                Ok(permit) => permit,
+                                Err(_) => {
+                                    error!("Connection limiter is closed");
+                                    break;
+                                }
+                            }
+                        } else {
+                            match tokio::time::timeout(
+                                Duration::from_millis(accept_permit_timeout_ms),
+                                max_connections_unix.clone().acquire_owned(),
+                            )
+                            .await
+                            {
+                                Ok(Ok(permit)) => permit,
+                                Ok(Err(_)) => {
+                                    error!("Connection limiter is closed");
+                                    break;
+                                }
+                                Err(_) => {
+                                    debug!(
+                                        timeout_ms = accept_permit_timeout_ms,
+                                        "Dropping accepted unix connection: permit wait timeout"
+                                    );
+                                    drop(stream);
+                                    continue;
+                                }
                            }
                        };
                        let conn_id =
@@ -312,7 +339,7 @@ pub(crate) fn spawn_tcp_accept_loops(
 ) {
    for (listener, listener_proxy_protocol) in listeners {
        let mut config_rx: watch::Receiver<Arc<ProxyConfig>> = config_rx.clone();
-        let mut admission_rx_tcp = admission_rx.clone();
+        let admission_rx_tcp = admission_rx.clone();
        let stats = stats.clone();
        let upstream_manager = upstream_manager.clone();
        let replay_checker = replay_checker.clone();
@@ -327,17 +354,46 @@ pub(crate) fn spawn_tcp_accept_loops(

        tokio::spawn(async move {
            loop {
-                if !wait_until_admission_open(&mut admission_rx_tcp).await {
-                    warn!("Conditional-admission gate channel closed for tcp listener");
-                    break;
-                }
                match listener.accept().await {
                    Ok((stream, peer_addr)) => {
-                        let permit = match max_connections_tcp.clone().acquire_owned().await {
-                            Ok(permit) => permit,
-                            Err(_) => {
-                                error!("Connection limiter is closed");
-                                break;
+                        if !*admission_rx_tcp.borrow() {
+                            debug!(peer = %peer_addr, "Admission gate closed, dropping connection");
+                            drop(stream);
+                            continue;
+                        }
+                        let accept_permit_timeout_ms = config_rx
+                            .borrow()
+                            .server
+                            .accept_permit_timeout_ms;
+                        let permit = if accept_permit_timeout_ms == 0 {
+                            match max_connections_tcp.clone().acquire_owned().await {
+                                Ok(permit) => permit,
+                                Err(_) => {
+                                    error!("Connection limiter is closed");
+                                    break;
+                                }
+                            }
+                        } else {
+                            match tokio::time::timeout(
+                                Duration::from_millis(accept_permit_timeout_ms),
+                                max_connections_tcp.clone().acquire_owned(),
+                            )
+                            .await
+                            {
+                                Ok(Ok(permit)) => permit,
+                                Ok(Err(_)) => {
+                                    error!("Connection limiter is closed");
+                                    break;
+                                }
+                                Err(_) => {
+                                    debug!(
+                                        peer = %peer_addr,
+                                        timeout_ms = accept_permit_timeout_ms,
+                                        "Dropping accepted connection: permit wait timeout"
+                                    );
+                                    drop(stream);
+                                    continue;
+                                }
                            }
                        };
                        let config = config_rx.borrow_and_update().clone();
@@ -237,7 +237,13 @@ pub(crate) async fn initialize_me_pool(
                    config.general.me_adaptive_floor_max_warm_writers_global,
                    config.general.hardswap,
                    config.general.me_pool_drain_ttl_secs,
+                    config.general.me_instadrain,
                    config.general.me_pool_drain_threshold,
+                    config.general.me_pool_drain_soft_evict_enabled,
+                    config.general.me_pool_drain_soft_evict_grace_secs,
+                    config.general.me_pool_drain_soft_evict_per_writer,
+                    config.general.me_pool_drain_soft_evict_budget_per_core,
+                    config.general.me_pool_drain_soft_evict_cooldown_ms,
                    config.general.effective_me_pool_force_close_secs(),
                    config.general.me_pool_min_fresh_ratio,
                    config.general.me_hardswap_warmup_delay_min_ms,
@@ -262,6 +268,8 @@ pub(crate) async fn initialize_me_pool(
                    config.general.me_warn_rate_limit_ms,
                    config.general.me_route_no_writer_mode,
                    config.general.me_route_no_writer_wait_ms,
+                    config.general.me_route_hybrid_max_wait_ms,
+                    config.general.me_route_blocking_send_timeout_ms,
                    config.general.me_route_inline_recovery_attempts,
                    config.general.me_route_inline_recovery_wait_ms,
                );
@@ -335,6 +343,13 @@ pub(crate) async fn initialize_me_pool(
                                            )
                                            .await;
                                        });
+                                        let pool_drain_enforcer = pool_bg.clone();
+                                        tokio::spawn(async move {
+                                            crate::transport::middle_proxy::me_drain_timeout_enforcer(
+                                                pool_drain_enforcer,
+                                            )
+                                            .await;
+                                        });
                                        break;
                                    }
                                    Err(e) => {
@@ -402,6 +417,13 @@ pub(crate) async fn initialize_me_pool(
                                    )
                                    .await;
                                });
+                                let pool_drain_enforcer = pool.clone();
+                                tokio::spawn(async move {
+                                    crate::transport::middle_proxy::me_drain_timeout_enforcer(
+                                        pool_drain_enforcer,
+                                    )
+                                    .await;
+                                });

                                break Some(pool);
                            }
@@ -45,7 +45,7 @@ use crate::startup::{
 use crate::stream::BufferPool;
 use crate::transport::middle_proxy::MePool;
 use crate::transport::UpstreamManager;
-use helpers::{parse_cli, resolve_runtime_config_path};
+use helpers::parse_cli;

 /// Runs the full telemt runtime startup pipeline and blocks until shutdown.
 pub async fn run() -> std::result::Result<(), Box<dyn std::error::Error>> {
@@ -58,26 +58,18 @@ pub async fn run() -> std::result::Result<(), Box<dyn std::error::Error>> {
    startup_tracker
        .start_component(COMPONENT_CONFIG_LOAD, Some("load and validate config".to_string()))
        .await;
-    let (config_path_cli, data_path, cli_silent, cli_log_level) = parse_cli();
-    let startup_cwd = match std::env::current_dir() {
-        Ok(cwd) => cwd,
-        Err(e) => {
-            eprintln!("[telemt] Can't read current_dir: {}", e);
-            std::process::exit(1);
-        }
-    };
-    let config_path = resolve_runtime_config_path(&config_path_cli, &startup_cwd);
+    let (config_path, data_path, cli_silent, cli_log_level) = parse_cli();

    let mut config = match ProxyConfig::load(&config_path) {
        Ok(c) => c,
        Err(e) => {
-            if config_path.exists() {
+            if std::path::Path::new(&config_path).exists() {
                eprintln!("[telemt] Error: {}", e);
                std::process::exit(1);
            } else {
                let default = ProxyConfig::default();
                std::fs::write(&config_path, toml::to_string_pretty(&default).unwrap()).unwrap();
-                eprintln!("[telemt] Created default config at {}", config_path.display());
+                eprintln!("[telemt] Created default config at {}", config_path);
                default
            }
        }
@@ -266,7 +258,7 @@ pub async fn run() -> std::result::Result<(), Box<dyn std::error::Error>> {
            let route_runtime_api = route_runtime.clone();
            let config_rx_api = api_config_rx.clone();
            let admission_rx_api = admission_rx.clone();
-            let config_path_api = config_path.clone();
+            let config_path_api = std::path::PathBuf::from(&config_path);
            let startup_tracker_api = startup_tracker.clone();
            let detected_ips_rx_api = detected_ips_rx.clone();
            tokio::spawn(async move {
@@ -484,7 +476,7 @@ pub async fn run() -> std::result::Result<(), Box<dyn std::error::Error>> {
        Duration::from_secs(config.access.replay_window_secs),
    ));

-    let buffer_pool = Arc::new(BufferPool::with_config(16 * 1024, 4096));
+    let buffer_pool = Arc::new(BufferPool::with_config(64 * 1024, 4096));

    connectivity::run_startup_connectivity(
        &config,
@@ -1,5 +1,5 @@
 use std::net::IpAddr;
-use std::path::Path;
+use std::path::PathBuf;
 use std::sync::Arc;

 use tokio::sync::{mpsc, watch};
@@ -32,7 +32,7 @@ pub(crate) struct RuntimeWatches {
 #[allow(clippy::too_many_arguments)]
 pub(crate) async fn spawn_runtime_tasks(
    config: &Arc<ProxyConfig>,
-    config_path: &Path,
+    config_path: &str,
    probe: &NetworkProbe,
    prefer_ipv6: bool,
    decision_ipv4_dc: bool,
@@ -83,7 +83,7 @@ pub(crate) async fn spawn_runtime_tasks(
        watch::Receiver<Arc<ProxyConfig>>,
        watch::Receiver<LogLevel>,
    ) = spawn_config_watcher(
-        config_path.to_path_buf(),
+        PathBuf::from(config_path),
        config.clone(),
        detected_ip_v4,
        detected_ip_v6,
@@ -292,6 +292,109 @@ async fn render_metrics(stats: &Stats, config: &ProxyConfig, ip_tracker: &UserIp
        "telemt_connections_bad_total {}",
        if core_enabled { stats.get_connects_bad() } else { 0 }
    );
+    let _ = writeln!(out, "# HELP telemt_connections_current Current active connections");
+    let _ = writeln!(out, "# TYPE telemt_connections_current gauge");
+    let _ = writeln!(
+        out,
+        "telemt_connections_current {}",
+        if core_enabled {
+            stats.get_current_connections_total()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(out, "# HELP telemt_connections_direct_current Current active direct connections");
+    let _ = writeln!(out, "# TYPE telemt_connections_direct_current gauge");
+    let _ = writeln!(
+        out,
+        "telemt_connections_direct_current {}",
+        if core_enabled {
+            stats.get_current_connections_direct()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(out, "# HELP telemt_connections_me_current Current active middle-end connections");
+    let _ = writeln!(out, "# TYPE telemt_connections_me_current gauge");
+    let _ = writeln!(
+        out,
+        "telemt_connections_me_current {}",
+        if core_enabled {
+            stats.get_current_connections_me()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(
+        out,
+        "# HELP telemt_relay_adaptive_promotions_total Adaptive relay tier promotions"
+    );
+    let _ = writeln!(out, "# TYPE telemt_relay_adaptive_promotions_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_relay_adaptive_promotions_total {}",
+        if core_enabled {
+            stats.get_relay_adaptive_promotions_total()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(
+        out,
+        "# HELP telemt_relay_adaptive_demotions_total Adaptive relay tier demotions"
+    );
+    let _ = writeln!(out, "# TYPE telemt_relay_adaptive_demotions_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_relay_adaptive_demotions_total {}",
+        if core_enabled {
+            stats.get_relay_adaptive_demotions_total()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(
+        out,
+        "# HELP telemt_relay_adaptive_hard_promotions_total Adaptive relay hard promotions triggered by write pressure"
+    );
+    let _ = writeln!(
+        out,
+        "# TYPE telemt_relay_adaptive_hard_promotions_total counter"
+    );
+    let _ = writeln!(
+        out,
+        "telemt_relay_adaptive_hard_promotions_total {}",
+        if core_enabled {
+            stats.get_relay_adaptive_hard_promotions_total()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(out, "# HELP telemt_reconnect_evict_total Reconnect-driven session evictions");
+    let _ = writeln!(out, "# TYPE telemt_reconnect_evict_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_reconnect_evict_total {}",
+        if core_enabled {
+            stats.get_reconnect_evict_total()
+        } else {
+            0
+        }
+    );
+    let _ = writeln!(
+        out,
+        "# HELP telemt_reconnect_stale_close_total Sessions closed because they became stale after reconnect"
+    );
+    let _ = writeln!(out, "# TYPE telemt_reconnect_stale_close_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_reconnect_stale_close_total {}",
+        if core_enabled {
+            stats.get_reconnect_stale_close_total()
+        } else {
+            0
+        }
+    );

    let _ = writeln!(out, "# HELP telemt_handshake_timeouts_total Handshake timeouts");
    let _ = writeln!(out, "# TYPE telemt_handshake_timeouts_total counter");
@@ -1547,6 +1650,36 @@ async fn render_metrics(stats: &Stats, config: &ProxyConfig, ip_tracker: &UserIp
        }
    );

+    let _ = writeln!(
+        out,
+        "# HELP telemt_pool_drain_soft_evict_total Soft-evicted client sessions on stuck draining writers"
+    );
+    let _ = writeln!(out, "# TYPE telemt_pool_drain_soft_evict_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_pool_drain_soft_evict_total {}",
+        if me_allows_normal {
+            stats.get_pool_drain_soft_evict_total()
+        } else {
+            0
+        }
+    );
+
+    let _ = writeln!(
+        out,
+        "# HELP telemt_pool_drain_soft_evict_writer_total Draining writers with at least one soft eviction"
+    );
+    let _ = writeln!(out, "# TYPE telemt_pool_drain_soft_evict_writer_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_pool_drain_soft_evict_writer_total {}",
+        if me_allows_normal {
+            stats.get_pool_drain_soft_evict_writer_total()
+        } else {
+            0
+        }
+    );
+
    let _ = writeln!(out, "# HELP telemt_pool_stale_pick_total Stale writer fallback picks for new binds");
    let _ = writeln!(out, "# TYPE telemt_pool_stale_pick_total counter");
    let _ = writeln!(
@@ -1559,6 +1692,57 @@ async fn render_metrics(stats: &Stats, config: &ProxyConfig, ip_tracker: &UserIp
        }
    );

+    let _ = writeln!(
+        out,
+        "# HELP telemt_me_writer_close_signal_drop_total Close-signal drops for already-removed ME writers"
+    );
+    let _ = writeln!(out, "# TYPE telemt_me_writer_close_signal_drop_total counter");
+    let _ = writeln!(
+        out,
+        "telemt_me_writer_close_signal_drop_total {}",
+        if me_allows_normal {
+            stats.get_me_writer_close_signal_drop_total()
+        } else {
+            0
+        }
+    );
+
+    let _ = writeln!(
+        out,
+        "# HELP telemt_me_writer_close_signal_channel_full_total Close-signal drops caused by full writer command channels"
+    );
+    let _ = writeln!(
+        out,
+        "# TYPE telemt_me_writer_close_signal_channel_full_total counter"
+    );
+    let _ = writeln!(
+        out,
+        "telemt_me_writer_close_signal_channel_full_total {}",
+        if me_allows_normal {
+            stats.get_me_writer_close_signal_channel_full_total()
+        } else {
+            0
+        }
+    );
+
+    let _ = writeln!(
+        out,
+        "# HELP telemt_me_draining_writers_reap_progress_total Draining-writer removals processed by reap cleanup"
+    );
+    let _ = writeln!(
+        out,
+        "# TYPE telemt_me_draining_writers_reap_progress_total counter"
+    );
+    let _ = writeln!(
+        out,
+        "telemt_me_draining_writers_reap_progress_total {}",
+        if me_allows_normal {
+            stats.get_me_draining_writers_reap_progress_total()
+        } else {
+            0
+        }
+    );
+
    let _ = writeln!(out, "# HELP telemt_me_writer_removed_total Total ME writer removals");
    let _ = writeln!(out, "# TYPE telemt_me_writer_removed_total counter");
    let _ = writeln!(
@@ -1864,6 +2048,8 @@ mod tests {
        stats.increment_connects_all();
        stats.increment_connects_all();
        stats.increment_connects_bad();
+        stats.increment_current_connections_direct();
+        stats.increment_current_connections_me();
        stats.increment_handshake_timeouts();
        stats.increment_upstream_connect_attempt_total();
        stats.increment_upstream_connect_attempt_total();
@@ -1895,6 +2081,9 @@ mod tests {

        assert!(output.contains("telemt_connections_total 2"));
        assert!(output.contains("telemt_connections_bad_total 1"));
+        assert!(output.contains("telemt_connections_current 2"));
+        assert!(output.contains("telemt_connections_direct_current 1"));
+        assert!(output.contains("telemt_connections_me_current 1"));
        assert!(output.contains("telemt_handshake_timeouts_total 1"));
        assert!(output.contains("telemt_upstream_connect_attempt_total 2"));
        assert!(output.contains("telemt_upstream_connect_success_total 1"));
@@ -1937,6 +2126,9 @@ mod tests {
        let output = render_metrics(&stats, &config, &tracker).await;
        assert!(output.contains("telemt_connections_total 0"));
        assert!(output.contains("telemt_connections_bad_total 0"));
+        assert!(output.contains("telemt_connections_current 0"));
+        assert!(output.contains("telemt_connections_direct_current 0"));
+        assert!(output.contains("telemt_connections_me_current 0"));
        assert!(output.contains("telemt_handshake_timeouts_total 0"));
        assert!(output.contains("telemt_user_unique_ips_current{user="));
        assert!(output.contains("telemt_user_unique_ips_recent_window{user="));
@@ -1970,11 +2162,28 @@ mod tests {
        assert!(output.contains("# TYPE telemt_uptime_seconds gauge"));
        assert!(output.contains("# TYPE telemt_connections_total counter"));
        assert!(output.contains("# TYPE telemt_connections_bad_total counter"));
+        assert!(output.contains("# TYPE telemt_connections_current gauge"));
+        assert!(output.contains("# TYPE telemt_connections_direct_current gauge"));
+        assert!(output.contains("# TYPE telemt_connections_me_current gauge"));
+        assert!(output.contains("# TYPE telemt_relay_adaptive_promotions_total counter"));
+        assert!(output.contains("# TYPE telemt_relay_adaptive_demotions_total counter"));
+        assert!(output.contains("# TYPE telemt_relay_adaptive_hard_promotions_total counter"));
+        assert!(output.contains("# TYPE telemt_reconnect_evict_total counter"));
+        assert!(output.contains("# TYPE telemt_reconnect_stale_close_total counter"));
        assert!(output.contains("# TYPE telemt_handshake_timeouts_total counter"));
        assert!(output.contains("# TYPE telemt_upstream_connect_attempt_total counter"));
        assert!(output.contains("# TYPE telemt_me_rpc_proxy_req_signal_sent_total counter"));
        assert!(output.contains("# TYPE telemt_me_idle_close_by_peer_total counter"));
        assert!(output.contains("# TYPE telemt_me_writer_removed_total counter"));
+        assert!(output.contains("# TYPE telemt_me_writer_close_signal_drop_total counter"));
+        assert!(output.contains(
+            "# TYPE telemt_me_writer_close_signal_channel_full_total counter"
+        ));
+        assert!(output.contains(
+            "# TYPE telemt_me_draining_writers_reap_progress_total counter"
+        ));
+        assert!(output.contains("# TYPE telemt_pool_drain_soft_evict_total counter"));
+        assert!(output.contains("# TYPE telemt_pool_drain_soft_evict_writer_total counter"));
        assert!(output.contains(
            "# TYPE telemt_me_writer_removed_unexpected_minus_restored_total gauge"
        ));
@@ -11,8 +11,8 @@ use crate::crypto::{sha256_hmac, SecureRandom};
 use crate::error::ProxyError;
 use super::constants::*;
 use std::time::{SystemTime, UNIX_EPOCH};
-use subtle::ConstantTimeEq;
-use x25519_dalek::{X25519_BASEPOINT_BYTES, x25519};
+use num_bigint::BigUint;
+use num_traits::One;

 // ============= Public Constants =============

@@ -26,17 +26,8 @@ pub const TLS_DIGEST_POS: usize = 11;
 pub const TLS_DIGEST_HALF_LEN: usize = 16;

 /// Time skew limits for anti-replay (in seconds)
-///
-/// The default window is intentionally narrow to reduce replay acceptance.
-/// Operators with known clock-drifted clients should tune deployment config
-/// (for example replay-window policy) to match their environment.
-pub const TIME_SKEW_MIN: i64 = -2 * 60; // 2 minutes before
-pub const TIME_SKEW_MAX: i64 = 2 * 60;  // 2 minutes after
-/// Maximum accepted boot-time timestamp (seconds) before skew checks are enforced.
-pub const BOOT_TIME_MAX_SECS: u32 = 7 * 24 * 60 * 60;
-/// Hard cap for boot-time compatibility bypass to avoid oversized acceptance
-/// windows when replay TTL is configured very large.
-pub const BOOT_TIME_COMPAT_MAX_SECS: u32 = 2 * 60;
+pub const TIME_SKEW_MIN: i64 = -20 * 60; // 20 minutes before
+pub const TIME_SKEW_MAX: i64 = 10 * 60;  // 10 minutes after

 // ============= Private Constants =============

@@ -69,7 +60,6 @@ pub struct TlsValidation {
    /// Client digest for response generation
    pub digest: [u8; TLS_DIGEST_LEN],
    /// Timestamp extracted from digest
-    
    pub timestamp: u32,
 }

@@ -124,8 +114,28 @@ impl TlsExtensionBuilder {
        self
    }

-    /// Build final extensions with length prefix
+    /// Add ALPN extension with a single selected protocol.
+    fn add_alpn(&mut self, proto: &[u8]) -> &mut Self {
+        // Extension type: ALPN (0x0010)
+        self.extensions.extend_from_slice(&extension_type::ALPN.to_be_bytes());
+
+        // ALPN extension format:
+        // extension_data length (2 bytes)
+        //   protocols length (2 bytes)
+        //     protocol name length (1 byte)
+        //     protocol name bytes
+        let proto_len = proto.len() as u8;
+        let list_len: u16 = 1 + proto_len as u16;
+        let ext_len: u16 = 2 + list_len;
+
+        self.extensions.extend_from_slice(&ext_len.to_be_bytes());
+        self.extensions.extend_from_slice(&list_len.to_be_bytes());
+        self.extensions.push(proto_len);
+        self.extensions.extend_from_slice(proto);
+        self
+    }
    
+    /// Build final extensions with length prefix
    fn build(self) -> Vec<u8> {
        let mut result = Vec::with_capacity(2 + self.extensions.len());
        
@@ -140,7 +150,7 @@ impl TlsExtensionBuilder {
    }
    
    /// Get current extensions without length prefix (for calculation)
-    
+    #[allow(dead_code)]
    fn as_bytes(&self) -> &[u8] {
        &self.extensions
    }
@@ -160,6 +170,8 @@ struct ServerHelloBuilder {
    compression: u8,
    /// Extensions
    extensions: TlsExtensionBuilder,
+    /// Selected ALPN protocol (if any)
+    alpn: Option<Vec<u8>>,
 }

 impl ServerHelloBuilder {
@@ -170,6 +182,7 @@ impl ServerHelloBuilder {
            cipher_suite: cipher_suite::TLS_AES_128_GCM_SHA256,
            compression: 0x00,
            extensions: TlsExtensionBuilder::new(),
+            alpn: None,
        }
    }
    
@@ -184,9 +197,18 @@ impl ServerHelloBuilder {
        self
    }

+    fn with_alpn(mut self, proto: Option<Vec<u8>>) -> Self {
+        self.alpn = proto;
+        self
+    }
+    
    /// Build ServerHello message (without record header)
    fn build_message(&self) -> Vec<u8> {
-        let extensions = self.extensions.extensions.clone();
+        let mut ext_builder = self.extensions.clone();
+        if let Some(ref alpn) = self.alpn {
+            ext_builder.add_alpn(alpn);
+        }
+        let extensions = ext_builder.extensions.clone();
        let extensions_len = extensions.len() as u16;
        
        // Calculate total length
@@ -251,97 +273,13 @@ impl ServerHelloBuilder {

 // ============= Public Functions =============

-/// Validate TLS ClientHello against user secrets.
+/// Validate TLS ClientHello against user secrets
 ///
 /// Returns validation result if a matching user is found.
-/// The result **must** be used — ignoring it silently bypasses authentication.
-#[must_use]
-
 pub fn validate_tls_handshake(
    handshake: &[u8],
    secrets: &[(String, Vec<u8>)],
    ignore_time_skew: bool,
-) -> Option<TlsValidation> {
-    validate_tls_handshake_with_replay_window(
-        handshake,
-        secrets,
-        ignore_time_skew,
-        u64::from(BOOT_TIME_MAX_SECS),
-    )
-}
-
-/// Validate TLS ClientHello and cap the boot-time bypass by replay-cache TTL.
-///
-/// A boot-time timestamp is only accepted when it falls below all three
-/// bounds: `BOOT_TIME_MAX_SECS`, configured replay window, and
-/// `BOOT_TIME_COMPAT_MAX_SECS`, preventing oversized compatibility windows.
-#[must_use]
-pub fn validate_tls_handshake_with_replay_window(
-    handshake: &[u8],
-    secrets: &[(String, Vec<u8>)],
-    ignore_time_skew: bool,
-    replay_window_secs: u64,
-) -> Option<TlsValidation> {
-    // Only pay the clock syscall when we will actually compare against it.
-    // If `ignore_time_skew` is set, a broken or unavailable system clock
-    // must not block legitimate clients — that would be a DoS via clock failure.
-    let now = if !ignore_time_skew {
-        system_time_to_unix_secs(SystemTime::now())?
-    } else {
-        0_i64
-    };
-
-    let replay_window_u32 = u32::try_from(replay_window_secs).unwrap_or(u32::MAX);
-    // Boot-time bypass and ignore_time_skew serve different compatibility paths.
-    // When skew checks are disabled, force boot-time cap to zero to prevent
-    // accidental future coupling of boot-time logic into the ignore-skew path.
-    let boot_time_cap_secs = if ignore_time_skew {
-        0
-    } else {
-        BOOT_TIME_MAX_SECS
-            .min(replay_window_u32)
-            .min(BOOT_TIME_COMPAT_MAX_SECS)
-    };
-
-    validate_tls_handshake_at_time_with_boot_cap(
-        handshake,
-        secrets,
-        ignore_time_skew,
-        now,
-        boot_time_cap_secs,
-    )
-}
-
-fn system_time_to_unix_secs(now: SystemTime) -> Option<i64> {
-    // `try_from` rejects values that overflow i64 (> ~292 billion years CE),
-    // whereas `as i64` would silently wrap to a negative timestamp and corrupt
-    // every subsequent time-skew comparison.
-    let d = now.duration_since(UNIX_EPOCH).ok()?;
-    i64::try_from(d.as_secs()).ok()
-}
-
-
-fn validate_tls_handshake_at_time(
-    handshake: &[u8],
-    secrets: &[(String, Vec<u8>)],
-    ignore_time_skew: bool,
-    now: i64,
-) -> Option<TlsValidation> {
-    validate_tls_handshake_at_time_with_boot_cap(
-        handshake,
-        secrets,
-        ignore_time_skew,
-        now,
-        BOOT_TIME_MAX_SECS,
-    )
-}
-
-fn validate_tls_handshake_at_time_with_boot_cap(
-    handshake: &[u8],
-    secrets: &[(String, Vec<u8>)],
-    ignore_time_skew: bool,
-    now: i64,
-    boot_time_cap_secs: u32,
 ) -> Option<TlsValidation> {
    if handshake.len() < TLS_DIGEST_POS + TLS_DIGEST_LEN + 1 {
        return None;
@@ -355,9 +293,6 @@ fn validate_tls_handshake_at_time_with_boot_cap(
    // Extract session ID
    let session_id_len_pos = TLS_DIGEST_POS + TLS_DIGEST_LEN;
    let session_id_len = handshake.get(session_id_len_pos).copied()? as usize;
-    if session_id_len > 32 {
-        return None;
-    }
    let session_id_start = session_id_len_pos + 1;
    
    if handshake.len() < session_id_start + session_id_len {
@@ -370,66 +305,73 @@ fn validate_tls_handshake_at_time_with_boot_cap(
    let mut msg = handshake.to_vec();
    msg[TLS_DIGEST_POS..TLS_DIGEST_POS + TLS_DIGEST_LEN].fill(0);
    
-    let mut first_match: Option<(&String, u32)> = None;
-
+    // Get current time
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap()
+        .as_secs() as i64;
+    
    for (user, secret) in secrets {
        let computed = sha256_hmac(secret, &msg);
-
-        // Constant-time equality check on the 28-byte HMAC window.
-        // A variable-time short-circuit here lets an active censor measure how many
-        // bytes matched, enabling secret brute-force via timing side-channels.
-        // Direct comparison on the original arrays avoids a heap allocation and
-        // removes the `try_into().unwrap()` that the intermediate Vec would require.
-        if !bool::from(digest[..28].ct_eq(&computed[..28])) {
+        
+        // XOR digests
+        let xored: Vec<u8> = digest.iter()
+            .zip(computed.iter())
+            .map(|(a, b)| a ^ b)
+            .collect();
+        
+        // Check that first 28 bytes are zeros (timestamp in last 4)
+        if !xored[..28].iter().all(|&b| b == 0) {
            continue;
        }
-
-        // The last 4 bytes encode the timestamp as XOR(digest[28..32], computed[28..32]).
-        // Inline array construction is infallible: both slices are [u8; 32] by construction.
-        let timestamp = u32::from_le_bytes([
-            digest[28] ^ computed[28],
-            digest[29] ^ computed[29],
-            digest[30] ^ computed[30],
-            digest[31] ^ computed[31],
-        ]);
-
-        // time_diff is only meaningful (and `now` is only valid) when we are
-        // actually checking the window.  Keep both inside the guard to make
-        // the dead-code path explicit and prevent accidental future use of
-        // a sentinel `now` value outside its intended scope.
+        
+        // Extract timestamp
+        let timestamp = u32::from_le_bytes(xored[28..32].try_into().unwrap());
+        let time_diff = now - timestamp as i64;
+        
+        // Check time skew
        if !ignore_time_skew {
            // Allow very small timestamps (boot time instead of unix time)
            // This is a quirk in some clients that use uptime instead of real time
-            let is_boot_time = boot_time_cap_secs > 0 && timestamp < boot_time_cap_secs;
-            if !is_boot_time {
-                let time_diff = now - i64::from(timestamp);
-                if !(TIME_SKEW_MIN..=TIME_SKEW_MAX).contains(&time_diff) {
-                    continue;
-                }
+            let is_boot_time = timestamp < 60 * 60 * 24 * 1000; // < ~2.7 years in seconds
+            
+            if !is_boot_time && !(TIME_SKEW_MIN..=TIME_SKEW_MAX).contains(&time_diff) {
+                continue;
            }
        }
        
-        if first_match.is_none() {
-            first_match = Some((user, timestamp));
-        }
+        return Some(TlsValidation {
+            user: user.clone(),
+            session_id,
+            digest,
+            timestamp,
+        });
    }
+    
+    None
+}

-    first_match.map(|(user, timestamp)| TlsValidation {
-        user: user.clone(),
-        session_id,
-        digest,
-        timestamp,
-    })
+fn curve25519_prime() -> BigUint {
+    (BigUint::one() << 255) - BigUint::from(19u32)
 }

 /// Generate a fake X25519 public key for TLS
 ///
-/// Uses RFC 7748 X25519 scalar multiplication over the canonical basepoint,
-/// yielding distribution-consistent public keys for anti-fingerprinting.
+/// Produces a quadratic residue mod p = 2^255 - 19 by computing n² mod p,
+/// which matches Python/C behavior and avoids DPI fingerprinting.
 pub fn gen_fake_x25519_key(rng: &SecureRandom) -> [u8; 32] {
-    let mut scalar = [0u8; 32];
-    scalar.copy_from_slice(&rng.bytes(32));
-    x25519(scalar, X25519_BASEPOINT_BYTES)
+    let mut n_bytes = [0u8; 32];
+    n_bytes.copy_from_slice(&rng.bytes(32));
+
+    let n = BigUint::from_bytes_le(&n_bytes);
+    let p = curve25519_prime();
+    let pk = (&n * &n) % &p;
+
+    let mut out = pk.to_bytes_le();
+    out.resize(32, 0);
+    let mut result = [0u8; 32];
+    result.copy_from_slice(&out[..32]);
+    result
 }

 /// Build TLS ServerHello response
@@ -458,6 +400,7 @@ pub fn build_server_hello(
    let server_hello = ServerHelloBuilder::new(session_id.to_vec())
        .with_x25519_key(&x25519_key)
        .with_tls13_version()
+        .with_alpn(alpn)
        .build_record();
    
    // Build Change Cipher Spec record
@@ -468,27 +411,8 @@ pub fn build_server_hello(
        0x01,       // CCS byte
    ];
    
-    // Build first encrypted flight mimic as opaque ApplicationData bytes.
-    // Embed a compact EncryptedExtensions-like ALPN block when selected.
-    let mut fake_cert = Vec::with_capacity(fake_cert_len);
-    if let Some(proto) = alpn.as_ref().filter(|p| !p.is_empty() && p.len() <= u8::MAX as usize) {
-        let proto_list_len = 1usize + proto.len();
-        let ext_data_len = 2usize + proto_list_len;
-        let marker_len = 4usize + ext_data_len;
-        if marker_len <= fake_cert_len {
-            fake_cert.extend_from_slice(&0x0010u16.to_be_bytes());
-            fake_cert.extend_from_slice(&(ext_data_len as u16).to_be_bytes());
-            fake_cert.extend_from_slice(&(proto_list_len as u16).to_be_bytes());
-            fake_cert.push(proto.len() as u8);
-            fake_cert.extend_from_slice(proto);
-        }
-    }
-    if fake_cert.len() < fake_cert_len {
-        fake_cert.extend_from_slice(&rng.bytes(fake_cert_len - fake_cert.len()));
-    } else if fake_cert.len() > fake_cert_len {
-        fake_cert.truncate(fake_cert_len);
-    }
-
+    // Build fake certificate (Application Data record)
+    let fake_cert = rng.bytes(fake_cert_len);
    let mut app_data_record = Vec::with_capacity(5 + fake_cert_len);
    app_data_record.push(TLS_RECORD_APPLICATION);
    app_data_record.extend_from_slice(&TLS_VERSION);
@@ -500,9 +424,8 @@ pub fn build_server_hello(
    // Build optional NewSessionTicket records (TLS 1.3 handshake messages are encrypted;
    // here we mimic with opaque ApplicationData records of plausible size).
    let mut tickets = Vec::new();
-    let ticket_count = new_session_tickets.min(4);
-    if ticket_count > 0 {
-        for _ in 0..ticket_count {
+    if new_session_tickets > 0 {
+        for _ in 0..new_session_tickets {
            let ticket_len: usize = rng.range(48) + 48; // 48-95 bytes
            let mut record = Vec::with_capacity(5 + ticket_len);
            record.push(TLS_RECORD_APPLICATION);
@@ -605,9 +528,7 @@ pub fn extract_sni_from_client_hello(handshake: &[u8]) -> Option<String> {
                if name_type == 0 && name_len > 0
                    && let Ok(host) = std::str::from_utf8(&handshake[sn_pos..sn_pos + name_len])
                {
-                    if is_valid_sni_hostname(host) {
-                        return Some(host.to_string());
-                    }
+                    return Some(host.to_string());
                }
                sn_pos += name_len;
            }
@@ -618,35 +539,6 @@ pub fn extract_sni_from_client_hello(handshake: &[u8]) -> Option<String> {
    None
 }

-fn is_valid_sni_hostname(host: &str) -> bool {
-    if host.is_empty() || host.len() > 253 {
-        return false;
-    }
-    if host.starts_with('.') || host.ends_with('.') {
-        return false;
-    }
-    if host.parse::<std::net::IpAddr>().is_ok() {
-        return false;
-    }
-
-    for label in host.split('.') {
-        if label.is_empty() || label.len() > 63 {
-            return false;
-        }
-        if label.starts_with('-') || label.ends_with('-') {
-            return false;
-        }
-        if !label
-            .bytes()
-            .all(|b| b.is_ascii_alphanumeric() || b == b'-')
-        {
-            return false;
-        }
-    }
-
-    true
-}
-
 /// Extract ALPN protocol list from ClientHello, return in offered order.
 pub fn extract_alpn_from_client_hello(handshake: &[u8]) -> Vec<Vec<u8>> {
    let mut pos = 5; // after record header
@@ -700,14 +592,13 @@ pub fn is_tls_handshake(first_bytes: &[u8]) -> bool {
        return false;
    }
    
-    // TLS ClientHello commonly uses legacy record versions 0x0301 or 0x0303.
+    // TLS record header: 0x16 (handshake) 0x03 0x01 (TLS 1.0)
    first_bytes[0] == TLS_RECORD_HANDSHAKE 
        && first_bytes[1] == 0x03 
-        && (first_bytes[2] == 0x01 || first_bytes[2] == 0x03)
+        && first_bytes[2] == 0x01
 }

 /// Parse TLS record header, returns (record_type, length)
-
 pub fn parse_tls_record_header(header: &[u8; 5]) -> Option<(u8, u16)> {
    let record_type = header[0];
    let version = [header[1], header[2]];
@@ -776,29 +667,291 @@ fn validate_server_hello_structure(data: &[u8]) -> Result<(), ProxyError> {
    Ok(())
 }

-// ============= Compile-time Security Invariants =============
-
-/// Compile-time checks that enforce invariants the rest of the code relies on.
-/// Using `static_assertions` ensures these can never silently break across
-/// refactors without a compile error.
-mod compile_time_security_checks {
-    use super::{TLS_DIGEST_LEN, TLS_DIGEST_HALF_LEN};
-    use static_assertions::const_assert;
-
-    // The digest must be exactly one SHA-256 output.
-    const_assert!(TLS_DIGEST_LEN == 32);
-
-    // Replay-dedup stores the first half; verify it is literally half.
-    const_assert!(TLS_DIGEST_HALF_LEN * 2 == TLS_DIGEST_LEN);
-
-    // The HMAC check window (28 bytes) plus the embedded timestamp (4 bytes)
-    // must exactly fill the digest.  If TLS_DIGEST_LEN ever changes, these
-    // assertions will catch the mismatch before any timing-oracle fix is broke.
-    const_assert!(28 + 4 == TLS_DIGEST_LEN);
-}
-
-// ============= Security-focused regression tests =============
-
 #[cfg(test)]
-#[path = "tls_security_tests.rs"]
-mod security_tests;
+mod tests {
+    use super::*;
+    
+    #[test]
+    fn test_is_tls_handshake() {
+        assert!(is_tls_handshake(&[0x16, 0x03, 0x01]));
+        assert!(is_tls_handshake(&[0x16, 0x03, 0x01, 0x02, 0x00]));
+        assert!(!is_tls_handshake(&[0x17, 0x03, 0x01])); // Application data
+        assert!(!is_tls_handshake(&[0x16, 0x03, 0x02])); // Wrong version
+        assert!(!is_tls_handshake(&[0x16, 0x03])); // Too short
+    }
+    
+    #[test]
+    fn test_parse_tls_record_header() {
+        let header = [0x16, 0x03, 0x01, 0x02, 0x00];
+        let result = parse_tls_record_header(&header).unwrap();
+        assert_eq!(result.0, TLS_RECORD_HANDSHAKE);
+        assert_eq!(result.1, 512);
+        
+        let header = [0x17, 0x03, 0x03, 0x40, 0x00];
+        let result = parse_tls_record_header(&header).unwrap();
+        assert_eq!(result.0, TLS_RECORD_APPLICATION);
+        assert_eq!(result.1, 16384);
+    }
+    
+    #[test]
+    fn test_gen_fake_x25519_key() {
+        let rng = SecureRandom::new();
+        let key1 = gen_fake_x25519_key(&rng);
+        let key2 = gen_fake_x25519_key(&rng);
+        
+        assert_eq!(key1.len(), 32);
+        assert_eq!(key2.len(), 32);
+        assert_ne!(key1, key2); // Should be random
+    }
+
+    #[test]
+    fn test_fake_x25519_key_is_quadratic_residue() {
+        let rng = SecureRandom::new();
+        let key = gen_fake_x25519_key(&rng);
+        let p = curve25519_prime();
+        let k_num = BigUint::from_bytes_le(&key);
+        let exponent = (&p - BigUint::one()) >> 1;
+        let legendre = k_num.modpow(&exponent, &p);
+        assert_eq!(legendre, BigUint::one());
+    }
+    
+    #[test]
+    fn test_tls_extension_builder() {
+        let key = [0x42u8; 32];
+        
+        let mut builder = TlsExtensionBuilder::new();
+        builder.add_key_share(&key);
+        builder.add_supported_versions(0x0304);
+        
+        let result = builder.build();
+        
+        // Check length prefix
+        let len = u16::from_be_bytes([result[0], result[1]]) as usize;
+        assert_eq!(len, result.len() - 2);
+        
+        // Check key_share extension is present
+        assert!(result.len() > 40); // At least key share
+    }
+    
+    #[test]
+    fn test_server_hello_builder() {
+        let session_id = vec![0x01, 0x02, 0x03, 0x04];
+        let key = [0x55u8; 32];
+        
+        let builder = ServerHelloBuilder::new(session_id.clone())
+            .with_x25519_key(&key)
+            .with_tls13_version();
+        
+        let record = builder.build_record();
+        
+        // Validate structure
+        validate_server_hello_structure(&record).expect("Invalid ServerHello structure");
+        
+        // Check record type
+        assert_eq!(record[0], TLS_RECORD_HANDSHAKE);
+        
+        // Check version
+        assert_eq!(&record[1..3], &TLS_VERSION);
+        
+        // Check message type (ServerHello = 0x02)
+        assert_eq!(record[5], 0x02);
+    }
+    
+    #[test]
+    fn test_build_server_hello_structure() {
+        let secret = b"test secret";
+        let client_digest = [0x42u8; 32];
+        let session_id = vec![0xAA; 32];
+        
+        let rng = SecureRandom::new();
+        let response = build_server_hello(secret, &client_digest, &session_id, 2048, &rng, None, 0);
+        
+        // Should have at least 3 records
+        assert!(response.len() > 100);
+        
+        // First record should be ServerHello
+        assert_eq!(response[0], TLS_RECORD_HANDSHAKE);
+        
+        // Validate ServerHello structure
+        validate_server_hello_structure(&response).expect("Invalid ServerHello");
+        
+        // Find Change Cipher Spec
+        let server_hello_len = 5 + u16::from_be_bytes([response[3], response[4]]) as usize;
+        let ccs_start = server_hello_len;
+        
+        assert!(response.len() > ccs_start + 6);
+        assert_eq!(response[ccs_start], TLS_RECORD_CHANGE_CIPHER);
+        
+        // Find Application Data
+        let ccs_len = 5 + u16::from_be_bytes([response[ccs_start + 3], response[ccs_start + 4]]) as usize;
+        let app_start = ccs_start + ccs_len;
+        
+        assert!(response.len() > app_start + 5);
+        assert_eq!(response[app_start], TLS_RECORD_APPLICATION);
+    }
+    
+    #[test]
+    fn test_build_server_hello_digest() {
+        let secret = b"test secret key here";
+        let client_digest = [0x42u8; 32];
+        let session_id = vec![0xAA; 32];
+        
+        let rng = SecureRandom::new();
+        let response1 = build_server_hello(secret, &client_digest, &session_id, 1024, &rng, None, 0);
+        let response2 = build_server_hello(secret, &client_digest, &session_id, 1024, &rng, None, 0);
+        
+        // Digest position should have non-zero data
+        let digest1 = &response1[TLS_DIGEST_POS..TLS_DIGEST_POS + TLS_DIGEST_LEN];
+        assert!(!digest1.iter().all(|&b| b == 0));
+        
+        // Different calls should have different digests (due to random cert)
+        let digest2 = &response2[TLS_DIGEST_POS..TLS_DIGEST_POS + TLS_DIGEST_LEN];
+        assert_ne!(digest1, digest2);
+    }
+    
+    #[test]
+    fn test_server_hello_extensions_length() {
+        let session_id = vec![0x01; 32];
+        let key = [0x55u8; 32];
+        
+        let builder = ServerHelloBuilder::new(session_id)
+            .with_x25519_key(&key)
+            .with_tls13_version();
+        
+        let record = builder.build_record();
+        
+        // Parse to find extensions
+        let msg_start = 5; // After record header
+        let msg_len = u32::from_be_bytes([0, record[6], record[7], record[8]]) as usize;
+        
+        // Skip to session ID
+        let session_id_pos = msg_start + 4 + 2 + 32; // header(4) + version(2) + random(32)
+        let session_id_len = record[session_id_pos] as usize;
+        
+        // Skip to extensions
+        let ext_len_pos = session_id_pos + 1 + session_id_len + 2 + 1; // session_id + cipher(2) + compression(1)
+        let ext_len = u16::from_be_bytes([record[ext_len_pos], record[ext_len_pos + 1]]) as usize;
+        
+        // Verify extensions length matches actual data
+        let extensions_data = &record[ext_len_pos + 2..msg_start + 4 + msg_len];
+        assert_eq!(ext_len, extensions_data.len(), 
+            "Extension length mismatch: declared {}, actual {}", ext_len, extensions_data.len());
+    }
+    
+    #[test]
+    fn test_validate_tls_handshake_format() {
+        // Build a minimal ClientHello-like structure
+        let mut handshake = vec![0u8; 100];
+        
+        // Put a valid-looking digest at position 11
+        handshake[TLS_DIGEST_POS..TLS_DIGEST_POS + TLS_DIGEST_LEN]
+            .copy_from_slice(&[0x42; 32]);
+        
+        // Session ID length
+        handshake[TLS_DIGEST_POS + TLS_DIGEST_LEN] = 32;
+        
+        // This won't validate (wrong HMAC) but shouldn't panic
+        let secrets = vec![("test".to_string(), b"secret".to_vec())];
+        let result = validate_tls_handshake(&handshake, &secrets, true);
+        
+        // Should return None (no match) but not panic
+        assert!(result.is_none());
+    }
+
+    fn build_client_hello_with_exts(exts: Vec<(u16, Vec<u8>)>, host: &str) -> Vec<u8> {
+        let mut body = Vec::new();
+        body.extend_from_slice(&TLS_VERSION); // legacy version
+        body.extend_from_slice(&[0u8; 32]); // random
+        body.push(0); // session id len
+        body.extend_from_slice(&2u16.to_be_bytes()); // cipher suites len
+        body.extend_from_slice(&[0x13, 0x01]); // TLS_AES_128_GCM_SHA256
+        body.push(1); // compression len
+        body.push(0); // null compression
+
+        // Build SNI extension
+        let host_bytes = host.as_bytes();
+        let mut sni_ext = Vec::new();
+        sni_ext.extend_from_slice(&(host_bytes.len() as u16 + 3).to_be_bytes());
+        sni_ext.push(0);
+        sni_ext.extend_from_slice(&(host_bytes.len() as u16).to_be_bytes());
+        sni_ext.extend_from_slice(host_bytes);
+
+        let mut ext_blob = Vec::new();
+        for (typ, data) in exts {
+            ext_blob.extend_from_slice(&typ.to_be_bytes());
+            ext_blob.extend_from_slice(&(data.len() as u16).to_be_bytes());
+            ext_blob.extend_from_slice(&data);
+        }
+        // SNI last
+        ext_blob.extend_from_slice(&0x0000u16.to_be_bytes());
+        ext_blob.extend_from_slice(&(sni_ext.len() as u16).to_be_bytes());
+        ext_blob.extend_from_slice(&sni_ext);
+
+        body.extend_from_slice(&(ext_blob.len() as u16).to_be_bytes());
+        body.extend_from_slice(&ext_blob);
+
+        let mut handshake = Vec::new();
+        handshake.push(0x01); // ClientHello
+        let len_bytes = (body.len() as u32).to_be_bytes();
+        handshake.extend_from_slice(&len_bytes[1..4]);
+        handshake.extend_from_slice(&body);
+
+        let mut record = Vec::new();
+        record.push(TLS_RECORD_HANDSHAKE);
+        record.extend_from_slice(&[0x03, 0x01]);
+        record.extend_from_slice(&(handshake.len() as u16).to_be_bytes());
+        record.extend_from_slice(&handshake);
+        record
+    }
+
+    #[test]
+    fn test_extract_sni_with_grease_extension() {
+        // GREASE type 0x0a0a with zero length before SNI
+        let ch = build_client_hello_with_exts(vec![(0x0a0a, Vec::new())], "example.com");
+        let sni = extract_sni_from_client_hello(&ch);
+        assert_eq!(sni.as_deref(), Some("example.com"));
+    }
+
+    #[test]
+    fn test_extract_sni_tolerates_empty_unknown_extension() {
+        let ch = build_client_hello_with_exts(vec![(0x1234, Vec::new())], "test.local");
+        let sni = extract_sni_from_client_hello(&ch);
+        assert_eq!(sni.as_deref(), Some("test.local"));
+    }
+
+    #[test]
+    fn test_extract_alpn_single() {
+        let mut alpn_data = Vec::new();
+        // list length = 3 (1 length byte + "h2")
+        alpn_data.extend_from_slice(&3u16.to_be_bytes());
+        alpn_data.push(2);
+        alpn_data.extend_from_slice(b"h2");
+        let ch = build_client_hello_with_exts(vec![(0x0010, alpn_data)], "alpn.test");
+        let alpn = extract_alpn_from_client_hello(&ch);
+        let alpn_str: Vec<String> = alpn
+            .iter()
+            .map(|p| std::str::from_utf8(p).unwrap().to_string())
+            .collect();
+        assert_eq!(alpn_str, vec!["h2"]);
+    }
+
+    #[test]
+    fn test_extract_alpn_multiple() {
+        let mut alpn_data = Vec::new();
+        // list length = 11 (sum of per-proto lengths including length bytes)
+        alpn_data.extend_from_slice(&11u16.to_be_bytes());
+        alpn_data.push(2);
+        alpn_data.extend_from_slice(b"h2");
+        alpn_data.push(4);
+        alpn_data.extend_from_slice(b"spdy");
+        alpn_data.push(2);
+        alpn_data.extend_from_slice(b"h3");
+        let ch = build_client_hello_with_exts(vec![(0x0010, alpn_data)], "alpn.test");
+        let alpn = extract_alpn_from_client_hello(&ch);
+        let alpn_str: Vec<String> = alpn
+            .iter()
+            .map(|p| std::str::from_utf8(p).unwrap().to_string())
+            .collect();
+        assert_eq!(alpn_str, vec!["h2", "spdy", "h3"]);
+    }
+}
@@ -0,0 +1,383 @@
+use dashmap::DashMap;
+use std::cmp::max;
+use std::sync::OnceLock;
+use std::time::{Duration, Instant};
+
+const EMA_ALPHA: f64 = 0.2;
+const PROFILE_TTL: Duration = Duration::from_secs(300);
+const THROUGHPUT_UP_BPS: f64 = 8_000_000.0;
+const THROUGHPUT_DOWN_BPS: f64 = 2_000_000.0;
+const RATIO_CONFIRM_THRESHOLD: f64 = 1.12;
+const TIER1_HOLD_TICKS: u32 = 8;
+const TIER2_HOLD_TICKS: u32 = 4;
+const QUIET_DEMOTE_TICKS: u32 = 480;
+const HARD_COOLDOWN_TICKS: u32 = 20;
+const HARD_PENDING_THRESHOLD: u32 = 3;
+const HARD_PARTIAL_RATIO_THRESHOLD: f64 = 0.25;
+const DIRECT_C2S_CAP_BYTES: usize = 128 * 1024;
+const DIRECT_S2C_CAP_BYTES: usize = 512 * 1024;
+const ME_FRAMES_CAP: usize = 96;
+const ME_BYTES_CAP: usize = 384 * 1024;
+const ME_DELAY_MIN_US: u64 = 150;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub enum AdaptiveTier {
+    Base = 0,
+    Tier1 = 1,
+    Tier2 = 2,
+    Tier3 = 3,
+}
+
+impl AdaptiveTier {
+    pub fn promote(self) -> Self {
+        match self {
+            Self::Base => Self::Tier1,
+            Self::Tier1 => Self::Tier2,
+            Self::Tier2 => Self::Tier3,
+            Self::Tier3 => Self::Tier3,
+        }
+    }
+
+    pub fn demote(self) -> Self {
+        match self {
+            Self::Base => Self::Base,
+            Self::Tier1 => Self::Base,
+            Self::Tier2 => Self::Tier1,
+            Self::Tier3 => Self::Tier2,
+        }
+    }
+
+    fn ratio(self) -> (usize, usize) {
+        match self {
+            Self::Base => (1, 1),
+            Self::Tier1 => (5, 4),
+            Self::Tier2 => (3, 2),
+            Self::Tier3 => (2, 1),
+        }
+    }
+
+    pub fn as_u8(self) -> u8 {
+        self as u8
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum TierTransitionReason {
+    SoftConfirmed,
+    HardPressure,
+    QuietDemotion,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct TierTransition {
+    pub from: AdaptiveTier,
+    pub to: AdaptiveTier,
+    pub reason: TierTransitionReason,
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+pub struct RelaySignalSample {
+    pub c2s_bytes: u64,
+    pub s2c_requested_bytes: u64,
+    pub s2c_written_bytes: u64,
+    pub s2c_write_ops: u64,
+    pub s2c_partial_writes: u64,
+    pub s2c_consecutive_pending_writes: u32,
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct SessionAdaptiveController {
+    tier: AdaptiveTier,
+    max_tier_seen: AdaptiveTier,
+    throughput_ema_bps: f64,
+    incoming_ema_bps: f64,
+    outgoing_ema_bps: f64,
+    tier1_hold_ticks: u32,
+    tier2_hold_ticks: u32,
+    quiet_ticks: u32,
+    hard_cooldown_ticks: u32,
+}
+
+impl SessionAdaptiveController {
+    pub fn new(initial_tier: AdaptiveTier) -> Self {
+        Self {
+            tier: initial_tier,
+            max_tier_seen: initial_tier,
+            throughput_ema_bps: 0.0,
+            incoming_ema_bps: 0.0,
+            outgoing_ema_bps: 0.0,
+            tier1_hold_ticks: 0,
+            tier2_hold_ticks: 0,
+            quiet_ticks: 0,
+            hard_cooldown_ticks: 0,
+        }
+    }
+
+    pub fn max_tier_seen(&self) -> AdaptiveTier {
+        self.max_tier_seen
+    }
+
+    pub fn observe(&mut self, sample: RelaySignalSample, tick_secs: f64) -> Option<TierTransition> {
+        if tick_secs <= f64::EPSILON {
+            return None;
+        }
+
+        if self.hard_cooldown_ticks > 0 {
+            self.hard_cooldown_ticks -= 1;
+        }
+
+        let c2s_bps = (sample.c2s_bytes as f64 * 8.0) / tick_secs;
+        let incoming_bps = (sample.s2c_requested_bytes as f64 * 8.0) / tick_secs;
+        let outgoing_bps = (sample.s2c_written_bytes as f64 * 8.0) / tick_secs;
+        let throughput = c2s_bps.max(outgoing_bps);
+
+        self.throughput_ema_bps = ema(self.throughput_ema_bps, throughput);
+        self.incoming_ema_bps = ema(self.incoming_ema_bps, incoming_bps);
+        self.outgoing_ema_bps = ema(self.outgoing_ema_bps, outgoing_bps);
+
+        let tier1_now = self.throughput_ema_bps >= THROUGHPUT_UP_BPS;
+        if tier1_now {
+            self.tier1_hold_ticks = self.tier1_hold_ticks.saturating_add(1);
+        } else {
+            self.tier1_hold_ticks = 0;
+        }
+
+        let ratio = if self.outgoing_ema_bps <= f64::EPSILON {
+            0.0
+        } else {
+            self.incoming_ema_bps / self.outgoing_ema_bps
+        };
+        let tier2_now = ratio >= RATIO_CONFIRM_THRESHOLD;
+        if tier2_now {
+            self.tier2_hold_ticks = self.tier2_hold_ticks.saturating_add(1);
+        } else {
+            self.tier2_hold_ticks = 0;
+        }
+
+        let partial_ratio = if sample.s2c_write_ops == 0 {
+            0.0
+        } else {
+            sample.s2c_partial_writes as f64 / sample.s2c_write_ops as f64
+        };
+        let hard_now = sample.s2c_consecutive_pending_writes >= HARD_PENDING_THRESHOLD
+            || partial_ratio >= HARD_PARTIAL_RATIO_THRESHOLD;
+
+        if hard_now && self.hard_cooldown_ticks == 0 {
+            return self.promote(TierTransitionReason::HardPressure, HARD_COOLDOWN_TICKS);
+        }
+
+        if self.tier1_hold_ticks >= TIER1_HOLD_TICKS && self.tier2_hold_ticks >= TIER2_HOLD_TICKS {
+            return self.promote(TierTransitionReason::SoftConfirmed, 0);
+        }
+
+        let demote_candidate = self.throughput_ema_bps < THROUGHPUT_DOWN_BPS && !tier2_now && !hard_now;
+        if demote_candidate {
+            self.quiet_ticks = self.quiet_ticks.saturating_add(1);
+            if self.quiet_ticks >= QUIET_DEMOTE_TICKS {
+                self.quiet_ticks = 0;
+                return self.demote(TierTransitionReason::QuietDemotion);
+            }
+        } else {
+            self.quiet_ticks = 0;
+        }
+
+        None
+    }
+
+    fn promote(
+        &mut self,
+        reason: TierTransitionReason,
+        hard_cooldown_ticks: u32,
+    ) -> Option<TierTransition> {
+        let from = self.tier;
+        let to = from.promote();
+        if from == to {
+            return None;
+        }
+        self.tier = to;
+        self.max_tier_seen = max(self.max_tier_seen, to);
+        self.hard_cooldown_ticks = hard_cooldown_ticks;
+        self.tier1_hold_ticks = 0;
+        self.tier2_hold_ticks = 0;
+        self.quiet_ticks = 0;
+        Some(TierTransition { from, to, reason })
+    }
+
+    fn demote(&mut self, reason: TierTransitionReason) -> Option<TierTransition> {
+        let from = self.tier;
+        let to = from.demote();
+        if from == to {
+            return None;
+        }
+        self.tier = to;
+        self.tier1_hold_ticks = 0;
+        self.tier2_hold_ticks = 0;
+        Some(TierTransition { from, to, reason })
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+struct UserAdaptiveProfile {
+    tier: AdaptiveTier,
+    seen_at: Instant,
+}
+
+fn profiles() -> &'static DashMap<String, UserAdaptiveProfile> {
+    static USER_PROFILES: OnceLock<DashMap<String, UserAdaptiveProfile>> = OnceLock::new();
+    USER_PROFILES.get_or_init(DashMap::new)
+}
+
+pub fn seed_tier_for_user(user: &str) -> AdaptiveTier {
+    let now = Instant::now();
+    if let Some(entry) = profiles().get(user) {
+        let value = entry.value();
+        if now.duration_since(value.seen_at) <= PROFILE_TTL {
+            return value.tier;
+        }
+    }
+    AdaptiveTier::Base
+}
+
+pub fn record_user_tier(user: &str, tier: AdaptiveTier) {
+    let now = Instant::now();
+    if let Some(mut entry) = profiles().get_mut(user) {
+        let existing = *entry;
+        let effective = if now.duration_since(existing.seen_at) > PROFILE_TTL {
+            tier
+        } else {
+            max(existing.tier, tier)
+        };
+        *entry = UserAdaptiveProfile {
+            tier: effective,
+            seen_at: now,
+        };
+        return;
+    }
+    profiles().insert(
+        user.to_string(),
+        UserAdaptiveProfile { tier, seen_at: now },
+    );
+}
+
+pub fn direct_copy_buffers_for_tier(
+    tier: AdaptiveTier,
+    base_c2s: usize,
+    base_s2c: usize,
+) -> (usize, usize) {
+    let (num, den) = tier.ratio();
+    (
+        scale(base_c2s, num, den, DIRECT_C2S_CAP_BYTES),
+        scale(base_s2c, num, den, DIRECT_S2C_CAP_BYTES),
+    )
+}
+
+pub fn me_flush_policy_for_tier(
+    tier: AdaptiveTier,
+    base_frames: usize,
+    base_bytes: usize,
+    base_delay: Duration,
+) -> (usize, usize, Duration) {
+    let (num, den) = tier.ratio();
+    let frames = scale(base_frames, num, den, ME_FRAMES_CAP).max(1);
+    let bytes = scale(base_bytes, num, den, ME_BYTES_CAP).max(4096);
+    let delay_us = base_delay.as_micros() as u64;
+    let adjusted_delay_us = match tier {
+        AdaptiveTier::Base => delay_us,
+        AdaptiveTier::Tier1 => (delay_us.saturating_mul(7)).saturating_div(10),
+        AdaptiveTier::Tier2 => delay_us.saturating_div(2),
+        AdaptiveTier::Tier3 => (delay_us.saturating_mul(3)).saturating_div(10),
+    }
+    .max(ME_DELAY_MIN_US)
+    .min(delay_us.max(ME_DELAY_MIN_US));
+    (frames, bytes, Duration::from_micros(adjusted_delay_us))
+}
+
+fn ema(prev: f64, value: f64) -> f64 {
+    if prev <= f64::EPSILON {
+        value
+    } else {
+        (prev * (1.0 - EMA_ALPHA)) + (value * EMA_ALPHA)
+    }
+}
+
+fn scale(base: usize, numerator: usize, denominator: usize, cap: usize) -> usize {
+    let scaled = base
+        .saturating_mul(numerator)
+        .saturating_div(denominator.max(1));
+    scaled.min(cap).max(1)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn sample(
+        c2s_bytes: u64,
+        s2c_requested_bytes: u64,
+        s2c_written_bytes: u64,
+        s2c_write_ops: u64,
+        s2c_partial_writes: u64,
+        s2c_consecutive_pending_writes: u32,
+    ) -> RelaySignalSample {
+        RelaySignalSample {
+            c2s_bytes,
+            s2c_requested_bytes,
+            s2c_written_bytes,
+            s2c_write_ops,
+            s2c_partial_writes,
+            s2c_consecutive_pending_writes,
+        }
+    }
+
+    #[test]
+    fn test_soft_promotion_requires_tier1_and_tier2() {
+        let mut ctrl = SessionAdaptiveController::new(AdaptiveTier::Base);
+        let tick_secs = 0.25;
+        let mut promoted = None;
+        for _ in 0..8 {
+            promoted = ctrl.observe(
+                sample(
+                    300_000, // ~9.6 Mbps
+                    320_000, // incoming > outgoing to confirm tier2
+                    250_000,
+                    10,
+                    0,
+                    0,
+                ),
+                tick_secs,
+            );
+        }
+
+        let transition = promoted.expect("expected soft promotion");
+        assert_eq!(transition.from, AdaptiveTier::Base);
+        assert_eq!(transition.to, AdaptiveTier::Tier1);
+        assert_eq!(transition.reason, TierTransitionReason::SoftConfirmed);
+    }
+
+    #[test]
+    fn test_hard_promotion_on_pending_pressure() {
+        let mut ctrl = SessionAdaptiveController::new(AdaptiveTier::Base);
+        let transition = ctrl
+            .observe(
+                sample(10_000, 20_000, 10_000, 4, 1, 3),
+                0.25,
+            )
+            .expect("expected hard promotion");
+        assert_eq!(transition.reason, TierTransitionReason::HardPressure);
+        assert_eq!(transition.to, AdaptiveTier::Tier1);
+    }
+
+    #[test]
+    fn test_quiet_demotion_is_slow_and_stepwise() {
+        let mut ctrl = SessionAdaptiveController::new(AdaptiveTier::Tier2);
+        let mut demotion = None;
+        for _ in 0..QUIET_DEMOTE_TICKS {
+            demotion = ctrl.observe(sample(1, 1, 1, 1, 0, 0), 0.25);
+        }
+
+        let transition = demotion.expect("expected quiet demotion");
+        assert_eq!(transition.from, AdaptiveTier::Tier2);
+        assert_eq!(transition.to, AdaptiveTier::Tier1);
+        assert_eq!(transition.reason, TierTransitionReason::QuietDemotion);
+    }
+}
@@ -4,10 +4,7 @@ use std::future::Future;
 use std::net::{IpAddr, SocketAddr};
 use std::pin::Pin;
 use std::sync::Arc;
-use std::sync::OnceLock;
-use std::sync::atomic::{AtomicBool, Ordering};
 use std::time::Duration;
-use ipnetwork::IpNetwork;
 use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite};
 use tokio::net::TcpStream;
 use tokio::time::timeout;
@@ -24,50 +21,9 @@ enum HandshakeOutcome {
    Handled,
 }

-#[must_use = "UserConnectionReservation must be kept alive to retain user/IP reservation until release or drop"]
-struct UserConnectionReservation {
-    stats: Arc<Stats>,
-    ip_tracker: Arc<UserIpTracker>,
-    user: String,
-    ip: IpAddr,
-    active: bool,
-}
-
-impl UserConnectionReservation {
-    fn new(stats: Arc<Stats>, ip_tracker: Arc<UserIpTracker>, user: String, ip: IpAddr) -> Self {
-        Self {
-            stats,
-            ip_tracker,
-            user,
-            ip,
-            active: true,
-        }
-    }
-
-    async fn release(mut self) {
-        if !self.active {
-            return;
-        }
-        self.ip_tracker.remove_ip(&self.user, self.ip).await;
-        self.active = false;
-        self.stats.decrement_user_curr_connects(&self.user);
-    }
-}
-
-impl Drop for UserConnectionReservation {
-    fn drop(&mut self) {
-        if !self.active {
-            return;
-        }
-        self.active = false;
-        self.stats.decrement_user_curr_connects(&self.user);
-        self.ip_tracker.enqueue_cleanup(self.user.clone(), self.ip);
-    }
-}
-
 use crate::config::ProxyConfig;
 use crate::crypto::SecureRandom;
-use crate::error::{HandshakeResult, ProxyError, Result, StreamError};
+use crate::error::{HandshakeResult, ProxyError, Result};
 use crate::ip_tracker::UserIpTracker;
 use crate::protocol::constants::*;
 use crate::protocol::tls;
@@ -84,21 +40,10 @@ use crate::proxy::handshake::{HandshakeSuccess, handle_mtproto_handshake, handle
 use crate::proxy::masking::handle_bad_client;
 use crate::proxy::middle_relay::handle_via_middle_proxy;
 use crate::proxy::route_mode::{RelayRouteMode, RouteRuntimeController};
+use crate::proxy::session_eviction::register_session;

 fn beobachten_ttl(config: &ProxyConfig) -> Duration {
-    let minutes = config.general.beobachten_minutes;
-    if minutes == 0 {
-        static BEOBACHTEN_ZERO_MINUTES_WARNED: OnceLock<AtomicBool> = OnceLock::new();
-        let warned = BEOBACHTEN_ZERO_MINUTES_WARNED.get_or_init(|| AtomicBool::new(false));
-        if !warned.swap(true, Ordering::Relaxed) {
-            warn!(
-                "general.beobachten_minutes=0 is insecure because entries expire immediately; forcing minimum TTL to 1 minute"
-            );
-        }
-        return Duration::from_secs(60);
-    }
-
-    Duration::from_secs(minutes.saturating_mul(60))
+    Duration::from_secs(config.general.beobachten_minutes.saturating_mul(60))
 }

 fn record_beobachten_class(
@@ -119,34 +64,14 @@ fn record_handshake_failure_class(
    peer_ip: IpAddr,
    error: &ProxyError,
 ) {
-    let class = match error {
-        ProxyError::Io(err) if err.kind() == std::io::ErrorKind::UnexpectedEof => {
-            "expected_64_got_0"
-        }
-        ProxyError::Stream(StreamError::UnexpectedEof) => "expected_64_got_0",
-        _ => "other",
+    let class = if error.to_string().contains("expected 64 bytes, got 0") {
+        "expected_64_got_0"
+    } else {
+        "other"
    };
    record_beobachten_class(beobachten, config, peer_ip, class);
 }

-fn is_trusted_proxy_source(peer_ip: IpAddr, trusted: &[IpNetwork]) -> bool {
-    if trusted.is_empty() {
-        static EMPTY_PROXY_TRUST_WARNED: OnceLock<AtomicBool> = OnceLock::new();
-        let warned = EMPTY_PROXY_TRUST_WARNED.get_or_init(|| AtomicBool::new(false));
-        if !warned.swap(true, Ordering::Relaxed) {
-            warn!(
-                "PROXY protocol enabled but server.proxy_protocol_trusted_cidrs is empty; rejecting all PROXY headers by default"
-            );
-        }
-        return false;
-    }
-    trusted.iter().any(|cidr| cidr.contains(peer_ip))
-}
-
-fn synthetic_local_addr(port: u16) -> SocketAddr {
-    SocketAddr::from(([0, 0, 0, 0], port))
-}
-
 pub async fn handle_client_stream<S>(
    mut stream: S,
    peer: SocketAddr,
@@ -170,7 +95,9 @@ where
    let mut real_peer = normalize_ip(peer);

    // For non-TCP streams, use a synthetic local address; may be overridden by PROXY protocol dst
-    let mut local_addr = synthetic_local_addr(config.server.port);
+    let mut local_addr: SocketAddr = format!("0.0.0.0:{}", config.server.port)
+        .parse()
+        .unwrap_or_else(|_| "0.0.0.0:443".parse().unwrap());

    if proxy_protocol_enabled {
        let proxy_header_timeout = Duration::from_millis(
@@ -178,17 +105,6 @@ where
        );
        match timeout(proxy_header_timeout, parse_proxy_protocol(&mut stream, peer)).await {
            Ok(Ok(info)) => {
-                if !is_trusted_proxy_source(peer.ip(), &config.server.proxy_protocol_trusted_cidrs)
-                {
-                    stats.increment_connects_bad();
-                    warn!(
-                        peer = %peer,
-                        trusted = ?config.server.proxy_protocol_trusted_cidrs,
-                        "Rejecting PROXY protocol header from untrusted source"
-                    );
-                    record_beobachten_class(&beobachten, &config, peer.ip(), "other");
-                    return Err(ProxyError::InvalidProxyProtocol);
-                }
                debug!(
                    peer = %peer,
                    client = %info.src_addr,
@@ -234,13 +150,8 @@ where
        if is_tls {
            let tls_len = u16::from_be_bytes([first_bytes[3], first_bytes[4]]) as usize;

-// RFC 8446 §5.1 mandates that TLSPlaintext records must not exceed 2^14
-        // bytes (16_384). A client claiming a larger record is non-compliant and
-        // may be an active probe attempting to force large allocations.
-        //
-        // Also enforce a minimum record size to avoid trivial/garbage probes.
-        if !(512..=MAX_TLS_RECORD_SIZE).contains(&tls_len) {
-                debug!(peer = %real_peer, tls_len = tls_len, max_tls_len = MAX_TLS_RECORD_SIZE, "TLS handshake length out of bounds");
+            if tls_len < 512 {
+                debug!(peer = %real_peer, tls_len = tls_len, "TLS handshake too short");
                stats.increment_connects_bad();
                let (reader, writer) = tokio::io::split(stream);
                handle_bad_client(
@@ -294,19 +205,9 @@ where
                &config, &replay_checker, true, Some(tls_user.as_str()),
            ).await {
                HandshakeResult::Success(result) => result,
-                HandshakeResult::BadClient { reader, writer } => {
+                HandshakeResult::BadClient { reader: _, writer: _ } => {
                    stats.increment_connects_bad();
                    debug!(peer = %peer, "Valid TLS but invalid MTProto handshake");
-                    handle_bad_client(
-                        reader,
-                        writer,
-                        &handshake,
-                        real_peer,
-                        local_addr,
-                        &config,
-                        &beobachten,
-                    )
-                    .await;
                    return Ok(HandshakeOutcome::Handled);
                }
                HandshakeResult::Error(e) => return Err(e),
@@ -481,6 +382,7 @@ impl RunningClientHandler {
    pub async fn run(self) -> Result<()> {
        self.stats.increment_connects_all();
        let peer = self.peer;
+        let _ip_tracker = self.ip_tracker.clone();
        debug!(peer = %peer, "New connection");

        if let Err(e) = configure_client_socket(
@@ -544,24 +446,6 @@ impl RunningClientHandler {
            .await
            {
                Ok(Ok(info)) => {
-                    if !is_trusted_proxy_source(
-                        self.peer.ip(),
-                        &self.config.server.proxy_protocol_trusted_cidrs,
-                    ) {
-                        self.stats.increment_connects_bad();
-                        warn!(
-                            peer = %self.peer,
-                            trusted = ?self.config.server.proxy_protocol_trusted_cidrs,
-                            "Rejecting PROXY protocol header from untrusted source"
-                        );
-                        record_beobachten_class(
-                            &self.beobachten,
-                            &self.config,
-                            self.peer.ip(),
-                            "other",
-                        );
-                        return Err(ProxyError::InvalidProxyProtocol);
-                    }
                    debug!(
                        peer = %self.peer,
                        client = %info.src_addr,
@@ -611,6 +495,7 @@ impl RunningClientHandler {

        let is_tls = tls::is_tls_handshake(&first_bytes[..3]);
        let peer = self.peer;
+        let _ip_tracker = self.ip_tracker.clone();

        debug!(peer = %peer, is_tls = is_tls, "Handshake type detected");

@@ -623,15 +508,14 @@ impl RunningClientHandler {

    async fn handle_tls_client(mut self, first_bytes: [u8; 5], local_addr: SocketAddr) -> Result<HandshakeOutcome> {
        let peer = self.peer;
+        let _ip_tracker = self.ip_tracker.clone();

        let tls_len = u16::from_be_bytes([first_bytes[3], first_bytes[4]]) as usize;

        debug!(peer = %peer, tls_len = tls_len, "Reading TLS handshake");

-        // See RFC 8446 §5.1: TLSPlaintext records must not exceed 16_384 bytes.
-        // Treat too-small or too-large lengths as active probes and mask them.
-        if !(512..=MAX_TLS_RECORD_SIZE).contains(&tls_len) {
-            debug!(peer = %peer, tls_len = tls_len, max_tls_len = MAX_TLS_RECORD_SIZE, "TLS handshake length out of bounds");
+        if tls_len < 512 {
+            debug!(peer = %peer, tls_len = tls_len, "TLS handshake too short");
            self.stats.increment_connects_bad();
            let (reader, writer) = self.stream.into_split();
            handle_bad_client(
@@ -707,19 +591,12 @@ impl RunningClientHandler {
        .await
        {
            HandshakeResult::Success(result) => result,
-            HandshakeResult::BadClient { reader, writer } => {
+            HandshakeResult::BadClient {
+                reader: _,
+                writer: _,
+            } => {
                stats.increment_connects_bad();
                debug!(peer = %peer, "Valid TLS but invalid MTProto handshake");
-                handle_bad_client(
-                    reader,
-                    writer,
-                    &handshake,
-                    peer,
-                    local_addr,
-                    &config,
-                    &self.beobachten,
-                )
-                .await;
                return Ok(HandshakeOutcome::Handled);
            }
            HandshakeResult::Error(e) => return Err(e),
@@ -746,6 +623,7 @@ impl RunningClientHandler {

    async fn handle_direct_client(mut self, first_bytes: [u8; 5], local_addr: SocketAddr) -> Result<HandshakeOutcome> {
        let peer = self.peer;
+        let _ip_tracker = self.ip_tracker.clone();

        if !self.config.general.modes.classic && !self.config.general.modes.secure {
            debug!(peer = %peer, "Non-TLS modes disabled");
@@ -849,22 +727,21 @@ impl RunningClientHandler {
    {
        let user = success.user.clone();

-        let user_limit_reservation =
-            match Self::acquire_user_connection_reservation_static(
-                &user,
-                &config,
-                stats.clone(),
-                peer_addr,
-                ip_tracker,
-            )
-            .await
-            {
-                Ok(reservation) => reservation,
-                Err(e) => {
-                    warn!(user = %user, error = %e, "User admission check failed");
-                    return Err(e);
-                }
-            };
+        if let Err(e) = Self::check_user_limits_static(&user, &config, &stats, peer_addr, &ip_tracker).await {
+            warn!(user = %user, error = %e, "User limit exceeded");
+            return Err(e);
+        }
+
+        let registration = register_session(&user, success.dc_idx);
+        if registration.replaced_existing {
+            stats.increment_reconnect_evict_total();
+            warn!(
+                user = %user,
+                dc = success.dc_idx,
+                "Reconnect detected: replacing active session for user+dc"
+            );
+        }
+        let session_lease = registration.lease;

        let route_snapshot = route_runtime.snapshot();
        let session_id = rng.u64();
@@ -877,7 +754,7 @@ impl RunningClientHandler {
                    client_writer,
                    success,
                    pool.clone(),
-                    stats.clone(),
+                    stats,
                    config,
                    buffer_pool,
                    local_addr,
@@ -885,6 +762,7 @@ impl RunningClientHandler {
                    route_runtime.subscribe(),
                    route_snapshot,
                    session_id,
+                    session_lease.clone(),
                )
                .await
            } else {
@@ -894,13 +772,14 @@ impl RunningClientHandler {
                    client_writer,
                    success,
                    upstream_manager,
-                    stats.clone(),
+                    stats,
                    config,
                    buffer_pool,
                    rng,
                    route_runtime.subscribe(),
                    route_snapshot,
                    session_id,
+                    session_lease.clone(),
                )
                .await
            }
@@ -911,78 +790,25 @@ impl RunningClientHandler {
                client_writer,
                success,
                upstream_manager,
-                stats.clone(),
+                stats,
                config,
                buffer_pool,
                rng,
                route_runtime.subscribe(),
                route_snapshot,
                session_id,
+                session_lease.clone(),
            )
            .await
        };
-        user_limit_reservation.release().await;
+
+        ip_tracker.remove_ip(&user, peer_addr.ip()).await;
        relay_result
    }

-    async fn acquire_user_connection_reservation_static(
-        user: &str,
-        config: &ProxyConfig,
-        stats: Arc<Stats>,
-        peer_addr: SocketAddr,
-        ip_tracker: Arc<UserIpTracker>,
-    ) -> Result<UserConnectionReservation> {
-        if let Some(expiration) = config.access.user_expirations.get(user)
-            && chrono::Utc::now() > *expiration
-        {
-            return Err(ProxyError::UserExpired {
-                user: user.to_string(),
-            });
-        }
-
-        if let Some(quota) = config.access.user_data_quota.get(user)
-            && stats.get_user_total_octets(user) >= *quota
-        {
-            return Err(ProxyError::DataQuotaExceeded {
-                user: user.to_string(),
-            });
-        }
-
-        let limit = config.access.user_max_tcp_conns.get(user).map(|v| *v as u64);
-        if !stats.try_acquire_user_curr_connects(user, limit) {
-            return Err(ProxyError::ConnectionLimitExceeded {
-                user: user.to_string(),
-            });
-        }
-
-        match ip_tracker.check_and_add(user, peer_addr.ip()).await {
-            Ok(()) => {}
-            Err(reason) => {
-                stats.decrement_user_curr_connects(user);
-                warn!(
-                    user = %user,
-                    ip = %peer_addr.ip(),
-                    reason = %reason,
-                    "IP limit exceeded"
-                );
-                return Err(ProxyError::ConnectionLimitExceeded {
-                    user: user.to_string(),
-                });
-            }
-        }
-
-        Ok(UserConnectionReservation::new(
-            stats,
-            ip_tracker,
-            user.to_string(),
-            peer_addr.ip(),
-        ))
-    }
-
-    #[cfg(test)]
    async fn check_user_limits_static(
-        user: &str,
-        config: &ProxyConfig,
+        user: &str, 
+        config: &ProxyConfig, 
        stats: &Stats,
        peer_addr: SocketAddr,
        ip_tracker: &UserIpTracker,
@@ -995,32 +821,9 @@ impl RunningClientHandler {
            });
        }

-        if let Some(quota) = config.access.user_data_quota.get(user)
-            && stats.get_user_total_octets(user) >= *quota
-        {
-            return Err(ProxyError::DataQuotaExceeded {
-                user: user.to_string(),
-            });
-        }
-
-        let limit = config
-            .access
-            .user_max_tcp_conns
-            .get(user)
-            .map(|v| *v as u64);
-        if !stats.try_acquire_user_curr_connects(user, limit) {
-            return Err(ProxyError::ConnectionLimitExceeded {
-                user: user.to_string(),
-            });
-        }
-
-        match ip_tracker.check_and_add(user, peer_addr.ip()).await {
-            Ok(()) => {
-                ip_tracker.remove_ip(user, peer_addr.ip()).await;
-                stats.decrement_user_curr_connects(user);
-            }
+        let ip_reserved = match ip_tracker.check_and_add(user, peer_addr.ip()).await {
+            Ok(()) => true,
            Err(reason) => {
-                stats.decrement_user_curr_connects(user);
                warn!(
                    user = %user,
                    ip = %peer_addr.ip(),
@@ -1031,12 +834,33 @@ impl RunningClientHandler {
                    user: user.to_string(),
                });
            }
+        };
+        // IP limit check
+
+        if let Some(limit) = config.access.user_max_tcp_conns.get(user)
+            && stats.get_user_curr_connects(user) >= *limit as u64
+        {
+            if ip_reserved {
+                ip_tracker.remove_ip(user, peer_addr.ip()).await;
+                stats.increment_ip_reservation_rollback_tcp_limit_total();
+            }
+            return Err(ProxyError::ConnectionLimitExceeded {
+                user: user.to_string(),
+            });
+        }
+
+        if let Some(quota) = config.access.user_data_quota.get(user)
+            && stats.get_user_total_octets(user) >= *quota
+        {
+            if ip_reserved {
+                ip_tracker.remove_ip(user, peer_addr.ip()).await;
+                stats.increment_ip_reservation_rollback_quota_limit_total();
+            }
+            return Err(ProxyError::DataQuotaExceeded {
+                user: user.to_string(),
+            });
        }

        Ok(())
    }
 }
-
-#[cfg(test)]
-#[path = "client_security_tests.rs"]
-mod security_tests;
@@ -1,11 +1,7 @@
-use std::ffi::OsString;
 use std::fs::OpenOptions;
 use std::io::Write;
 use std::net::SocketAddr;
-use std::path::{Component, Path, PathBuf};
 use std::sync::Arc;
-use std::collections::HashSet;
-use std::sync::{Mutex, OnceLock};

 use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt};
 use tokio::net::TcpStream;
@@ -22,155 +18,12 @@ use crate::proxy::route_mode::{
    RelayRouteMode, RouteCutoverState, ROUTE_SWITCH_ERROR_MSG, affected_cutover_state,
    cutover_stagger_delay,
 };
+use crate::proxy::adaptive_buffers;
+use crate::proxy::session_eviction::SessionLease;
 use crate::stats::Stats;
 use crate::stream::{BufferPool, CryptoReader, CryptoWriter};
 use crate::transport::UpstreamManager;

-#[cfg(unix)]
-use std::os::unix::fs::OpenOptionsExt;
-
-const UNKNOWN_DC_LOG_DISTINCT_LIMIT: usize = 1024;
-static LOGGED_UNKNOWN_DCS: OnceLock<Mutex<HashSet<i16>>> = OnceLock::new();
-const MAX_SCOPE_HINT_LEN: usize = 64;
-
-fn validated_scope_hint(user: &str) -> Option<&str> {
-    let scope = user.strip_prefix("scope_")?;
-    if scope.is_empty() || scope.len() > MAX_SCOPE_HINT_LEN {
-        return None;
-    }
-    if scope
-        .bytes()
-        .all(|b| b.is_ascii_alphanumeric() || b == b'-')
-    {
-        Some(scope)
-    } else {
-        None
-    }
-}
-
-#[derive(Clone)]
-struct SanitizedUnknownDcLogPath {
-    resolved_path: PathBuf,
-    allowed_parent: PathBuf,
-    file_name: OsString,
-}
-
-// In tests, this function shares global mutable state. Callers that also use
-// cache-reset helpers must hold `unknown_dc_test_lock()` to keep assertions
-// deterministic under parallel execution.
-fn should_log_unknown_dc(dc_idx: i16) -> bool {
-    let set = LOGGED_UNKNOWN_DCS.get_or_init(|| Mutex::new(HashSet::new()));
-    should_log_unknown_dc_with_set(set, dc_idx)
-}
-
-fn should_log_unknown_dc_with_set(set: &Mutex<HashSet<i16>>, dc_idx: i16) -> bool {
-    match set.lock() {
-        Ok(mut guard) => {
-            if guard.contains(&dc_idx) {
-                return false;
-            }
-            if guard.len() >= UNKNOWN_DC_LOG_DISTINCT_LIMIT {
-                return false;
-            }
-            guard.insert(dc_idx)
-        }
-        // Fail closed on poisoned state to avoid unbounded blocking log writes.
-        Err(_) => false,
-    }
-}
-
-fn sanitize_unknown_dc_log_path(path: &str) -> Option<SanitizedUnknownDcLogPath> {
-    let candidate = Path::new(path);
-    if candidate.as_os_str().is_empty() {
-        return None;
-    }
-    if candidate
-        .components()
-        .any(|component| matches!(component, Component::ParentDir))
-    {
-        return None;
-    }
-
-    let cwd = std::env::current_dir().ok()?;
-    let file_name = candidate.file_name()?;
-    let parent = candidate.parent().unwrap_or_else(|| Path::new("."));
-    let parent_path = if parent.is_absolute() {
-        parent.to_path_buf()
-    } else {
-        cwd.join(parent)
-    };
-    let canonical_parent = parent_path.canonicalize().ok()?;
-    if !canonical_parent.is_dir() {
-        return None;
-    }
-
-    Some(SanitizedUnknownDcLogPath {
-        resolved_path: canonical_parent.join(file_name),
-        allowed_parent: canonical_parent,
-        file_name: file_name.to_os_string(),
-    })
-}
-
-fn unknown_dc_log_path_is_still_safe(path: &SanitizedUnknownDcLogPath) -> bool {
-    let Some(parent) = path.resolved_path.parent() else {
-        return false;
-    };
-    let Ok(current_parent) = parent.canonicalize() else {
-        return false;
-    };
-    if current_parent != path.allowed_parent {
-        return false;
-    }
-
-    if let Ok(canonical_target) = path.resolved_path.canonicalize() {
-        let Some(target_parent) = canonical_target.parent() else {
-            return false;
-        };
-        let Some(target_name) = canonical_target.file_name() else {
-            return false;
-        };
-        if target_parent != path.allowed_parent || target_name != path.file_name {
-            return false;
-        }
-    }
-
-    true
-}
-
-fn open_unknown_dc_log_append(path: &Path) -> std::io::Result<std::fs::File> {
-    #[cfg(unix)]
-    {
-        OpenOptions::new()
-            .create(true)
-            .append(true)
-            .custom_flags(libc::O_NOFOLLOW)
-            .open(path)
-    }
-    #[cfg(not(unix))]
-    {
-        let _ = path;
-        Err(std::io::Error::new(
-            std::io::ErrorKind::PermissionDenied,
-            "unknown_dc_file_log_enabled requires unix O_NOFOLLOW support",
-        ))
-    }
-}
-
-#[cfg(test)]
-fn clear_unknown_dc_log_cache_for_testing() {
-    if let Some(set) = LOGGED_UNKNOWN_DCS.get()
-        && let Ok(mut guard) = set.lock()
-    {
-        guard.clear();
-    }
-}
-
-#[cfg(test)]
-fn unknown_dc_test_lock() -> &'static Mutex<()> {
-    static TEST_LOCK: OnceLock<Mutex<()>> = OnceLock::new();
-    TEST_LOCK.get_or_init(|| Mutex::new(()))
-}
-
 pub(crate) async fn handle_via_direct<R, W>(
    client_reader: CryptoReader<R>,
    client_writer: CryptoWriter<W>,
@@ -183,6 +36,7 @@ pub(crate) async fn handle_via_direct<R, W>(
    mut route_rx: watch::Receiver<RouteCutoverState>,
    route_snapshot: RouteCutoverState,
    session_id: u64,
+    session_lease: SessionLease,
 ) -> Result<()>
 where
    R: AsyncRead + Unpin + Send + 'static,
@@ -201,15 +55,8 @@ where
        "Connecting to Telegram DC"
    );

-    let scope_hint = validated_scope_hint(user);
-    if user.starts_with("scope_") && scope_hint.is_none() {
-        warn!(
-            user = %user,
-            "Ignoring invalid scope hint and falling back to default upstream selection"
-        );
-    }
    let tg_stream = upstream_manager
-        .connect(dc_addr, Some(success.dc_idx), scope_hint)
+        .connect(dc_addr, Some(success.dc_idx), user.strip_prefix("scope_").filter(|s| !s.is_empty()))
        .await?;

    debug!(peer = %success.peer, dc_addr = %dc_addr, "Connected, performing TG handshake");
@@ -220,19 +67,29 @@ where
    debug!(peer = %success.peer, "TG handshake complete, starting relay");

    stats.increment_user_connects(user);
-    let _direct_connection_lease = stats.acquire_direct_connection_lease();
+    stats.increment_user_curr_connects(user);
+    stats.increment_current_connections_direct();
+
+    let seed_tier = adaptive_buffers::seed_tier_for_user(user);
+    let (c2s_copy_buf, s2c_copy_buf) = adaptive_buffers::direct_copy_buffers_for_tier(
+        seed_tier,
+        config.general.direct_relay_copy_buf_c2s_bytes,
+        config.general.direct_relay_copy_buf_s2c_bytes,
+    );

    let relay_result = relay_bidirectional(
        client_reader,
        client_writer,
        tg_reader,
        tg_writer,
-        config.general.direct_relay_copy_buf_c2s_bytes,
-        config.general.direct_relay_copy_buf_s2c_bytes,
+        c2s_copy_buf,
+        s2c_copy_buf,
        user,
+        success.dc_idx,
        Arc::clone(&stats),
-        config.access.user_data_quota.get(user).copied(),
        buffer_pool,
+        session_lease,
+        seed_tier,
    );
    tokio::pin!(relay_result);
    let relay_result = loop {
@@ -264,6 +121,9 @@ where
        }
    };

+    stats.decrement_current_connections_direct();
+    stats.decrement_user_curr_connects(user);
+
    match &relay_result {
        Ok(()) => debug!(user = %user, "Direct relay completed"),
        Err(e) => debug!(user = %user, error = %e, "Direct relay ended with error"),
@@ -315,19 +175,12 @@ fn get_dc_addr_static(dc_idx: i16, config: &ProxyConfig) -> Result<SocketAddr> {
            && let Some(path) = &config.general.unknown_dc_log_path
            && let Ok(handle) = tokio::runtime::Handle::try_current()
        {
-            if let Some(path) = sanitize_unknown_dc_log_path(path) {
-                if should_log_unknown_dc(dc_idx) {
-                    handle.spawn_blocking(move || {
-                        if unknown_dc_log_path_is_still_safe(&path)
-                            && let Ok(mut file) = open_unknown_dc_log_append(&path.resolved_path)
-                        {
-                            let _ = writeln!(file, "dc_idx={dc_idx}");
-                        }
-                    });
+            let path = path.clone();
+            handle.spawn_blocking(move || {
+                if let Ok(mut file) = OpenOptions::new().create(true).append(true).open(path) {
+                    let _ = writeln!(file, "dc_idx={dc_idx}");
                }
-            } else {
-                warn!(dc_idx = dc_idx, raw_path = %path, "Rejected unsafe unknown DC log path");
-            }
+            });
        }
    }

@@ -335,7 +188,7 @@ fn get_dc_addr_static(dc_idx: i16, config: &ProxyConfig) -> Result<SocketAddr> {
    let fallback_idx = if default_dc >= 1 && default_dc <= num_dcs {
        default_dc - 1
    } else {
-        0
+        1
    };

    info!(
@@ -363,6 +216,8 @@ async fn do_tg_handshake_static(
    let (nonce, _tg_enc_key, _tg_enc_iv, _tg_dec_key, _tg_dec_iv) = generate_tg_nonce(
        success.proto_tag,
        success.dc_idx,
+        &success.dec_key,
+        success.dec_iv,
        &success.enc_key,
        success.enc_iv,
        rng,
@@ -388,7 +243,3 @@ async fn do_tg_handshake_static(
        CryptoWriter::new(write_half, tg_encryptor, max_pending),
    ))
 }
-
-#[cfg(test)]
-#[path = "direct_relay_security_tests.rs"]
-mod security_tests;
@@ -3,18 +3,11 @@
 #![allow(dead_code)]

 use std::net::SocketAddr;
-use std::collections::HashSet;
-use std::collections::hash_map::RandomState;
-use std::net::{IpAddr, Ipv6Addr};
 use std::sync::Arc;
-use std::sync::{Mutex, OnceLock};
-use std::hash::{BuildHasher, Hash, Hasher};
-use std::time::{Duration, Instant};
-use dashmap::DashMap;
-use dashmap::mapref::entry::Entry;
+use std::time::Duration;
 use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt};
 use tracing::{debug, warn, trace};
-use zeroize::{Zeroize, Zeroizing};
+use zeroize::Zeroize;

 use crate::crypto::{sha256, AesCtr, SecureRandom};
 use rand::Rng;
@@ -26,463 +19,6 @@ use crate::stats::ReplayChecker;
 use crate::config::ProxyConfig;
 use crate::tls_front::{TlsFrontCache, emulator};

-const ACCESS_SECRET_BYTES: usize = 16;
-static INVALID_SECRET_WARNED: OnceLock<Mutex<HashSet<(String, String)>>> = OnceLock::new();
-#[cfg(test)]
-const WARNED_SECRET_MAX_ENTRIES: usize = 64;
-#[cfg(not(test))]
-const WARNED_SECRET_MAX_ENTRIES: usize = 1_024;
-
-const AUTH_PROBE_TRACK_RETENTION_SECS: u64 = 10 * 60;
-#[cfg(test)]
-const AUTH_PROBE_TRACK_MAX_ENTRIES: usize = 256;
-#[cfg(not(test))]
-const AUTH_PROBE_TRACK_MAX_ENTRIES: usize = 65_536;
-const AUTH_PROBE_PRUNE_SCAN_LIMIT: usize = 1_024;
-const AUTH_PROBE_BACKOFF_START_FAILS: u32 = 4;
-const AUTH_PROBE_SATURATION_GRACE_FAILS: u32 = 2;
-
-#[cfg(test)]
-const AUTH_PROBE_BACKOFF_BASE_MS: u64 = 1;
-#[cfg(not(test))]
-const AUTH_PROBE_BACKOFF_BASE_MS: u64 = 25;
-
-#[cfg(test)]
-const AUTH_PROBE_BACKOFF_MAX_MS: u64 = 16;
-#[cfg(not(test))]
-const AUTH_PROBE_BACKOFF_MAX_MS: u64 = 1_000;
-
-#[derive(Clone, Copy)]
-struct AuthProbeState {
-    fail_streak: u32,
-    blocked_until: Instant,
-    last_seen: Instant,
-}
-
-#[derive(Clone, Copy)]
-struct AuthProbeSaturationState {
-    fail_streak: u32,
-    blocked_until: Instant,
-    last_seen: Instant,
-}
-
-static AUTH_PROBE_STATE: OnceLock<DashMap<IpAddr, AuthProbeState>> = OnceLock::new();
-static AUTH_PROBE_SATURATION_STATE: OnceLock<Mutex<Option<AuthProbeSaturationState>>> = OnceLock::new();
-static AUTH_PROBE_EVICTION_HASHER: OnceLock<RandomState> = OnceLock::new();
-
-fn auth_probe_state_map() -> &'static DashMap<IpAddr, AuthProbeState> {
-    AUTH_PROBE_STATE.get_or_init(DashMap::new)
-}
-
-fn auth_probe_saturation_state() -> &'static Mutex<Option<AuthProbeSaturationState>> {
-    AUTH_PROBE_SATURATION_STATE.get_or_init(|| Mutex::new(None))
-}
-
-fn normalize_auth_probe_ip(peer_ip: IpAddr) -> IpAddr {
-    match peer_ip {
-        IpAddr::V4(ip) => IpAddr::V4(ip),
-        IpAddr::V6(ip) => {
-            let [a, b, c, d, _, _, _, _] = ip.segments();
-            IpAddr::V6(Ipv6Addr::new(a, b, c, d, 0, 0, 0, 0))
-        }
-    }
-}
-
-fn auth_probe_backoff(fail_streak: u32) -> Duration {
-    if fail_streak < AUTH_PROBE_BACKOFF_START_FAILS {
-        return Duration::ZERO;
-    }
-    let shift = (fail_streak - AUTH_PROBE_BACKOFF_START_FAILS).min(10);
-    let multiplier = 1u64.checked_shl(shift).unwrap_or(u64::MAX);
-    let ms = AUTH_PROBE_BACKOFF_BASE_MS
-        .saturating_mul(multiplier)
-        .min(AUTH_PROBE_BACKOFF_MAX_MS);
-    Duration::from_millis(ms)
-}
-
-fn auth_probe_state_expired(state: &AuthProbeState, now: Instant) -> bool {
-    let retention = Duration::from_secs(AUTH_PROBE_TRACK_RETENTION_SECS);
-    now.duration_since(state.last_seen) > retention
-}
-
-fn auth_probe_eviction_offset(peer_ip: IpAddr, now: Instant) -> usize {
-    let hasher_state = AUTH_PROBE_EVICTION_HASHER.get_or_init(RandomState::new);
-    let mut hasher = hasher_state.build_hasher();
-    peer_ip.hash(&mut hasher);
-    now.hash(&mut hasher);
-    hasher.finish() as usize
-}
-
-fn auth_probe_is_throttled(peer_ip: IpAddr, now: Instant) -> bool {
-    let peer_ip = normalize_auth_probe_ip(peer_ip);
-    let state = auth_probe_state_map();
-    let Some(entry) = state.get(&peer_ip) else {
-        return false;
-    };
-    if auth_probe_state_expired(&entry, now) {
-        drop(entry);
-        state.remove(&peer_ip);
-        return false;
-    }
-    now < entry.blocked_until
-}
-
-fn auth_probe_saturation_grace_exhausted(peer_ip: IpAddr, now: Instant) -> bool {
-    let peer_ip = normalize_auth_probe_ip(peer_ip);
-    let state = auth_probe_state_map();
-    let Some(entry) = state.get(&peer_ip) else {
-        return false;
-    };
-    if auth_probe_state_expired(&entry, now) {
-        drop(entry);
-        state.remove(&peer_ip);
-        return false;
-    }
-
-    entry.fail_streak >= AUTH_PROBE_BACKOFF_START_FAILS + AUTH_PROBE_SATURATION_GRACE_FAILS
-}
-
-fn auth_probe_should_apply_preauth_throttle(peer_ip: IpAddr, now: Instant) -> bool {
-    if !auth_probe_is_throttled(peer_ip, now) {
-        return false;
-    }
-
-    if !auth_probe_saturation_is_throttled(now) {
-        return true;
-    }
-
-    auth_probe_saturation_grace_exhausted(peer_ip, now)
-}
-
-fn auth_probe_saturation_is_throttled(now: Instant) -> bool {
-    let saturation = auth_probe_saturation_state();
-    let mut guard = match saturation.lock() {
-        Ok(guard) => guard,
-        Err(_) => return false,
-    };
-
-    let Some(state) = guard.as_mut() else {
-        return false;
-    };
-
-    if now.duration_since(state.last_seen) > Duration::from_secs(AUTH_PROBE_TRACK_RETENTION_SECS) {
-        *guard = None;
-        return false;
-    }
-
-    if now < state.blocked_until {
-        return true;
-    }
-
-    false
-}
-
-fn auth_probe_note_saturation(now: Instant) {
-    let saturation = auth_probe_saturation_state();
-    let mut guard = match saturation.lock() {
-        Ok(guard) => guard,
-        Err(_) => return,
-    };
-
-    match guard.as_mut() {
-        Some(state)
-            if now.duration_since(state.last_seen)
-                <= Duration::from_secs(AUTH_PROBE_TRACK_RETENTION_SECS) =>
-        {
-            state.fail_streak = state.fail_streak.saturating_add(1);
-            state.last_seen = now;
-            state.blocked_until = now + auth_probe_backoff(state.fail_streak);
-        }
-        _ => {
-            let fail_streak = AUTH_PROBE_BACKOFF_START_FAILS;
-            *guard = Some(AuthProbeSaturationState {
-                fail_streak,
-                blocked_until: now + auth_probe_backoff(fail_streak),
-                last_seen: now,
-            });
-        }
-    }
-}
-
-fn auth_probe_record_failure(peer_ip: IpAddr, now: Instant) {
-    let peer_ip = normalize_auth_probe_ip(peer_ip);
-    let state = auth_probe_state_map();
-    auth_probe_record_failure_with_state(state, peer_ip, now);
-}
-
-fn auth_probe_record_failure_with_state(
-    state: &DashMap<IpAddr, AuthProbeState>,
-    peer_ip: IpAddr,
-    now: Instant,
-) {
-    let make_new_state = || AuthProbeState {
-        fail_streak: 1,
-        blocked_until: now + auth_probe_backoff(1),
-        last_seen: now,
-    };
-
-    let update_existing = |entry: &mut AuthProbeState| {
-        if auth_probe_state_expired(entry, now) {
-            *entry = make_new_state();
-        } else {
-            entry.fail_streak = entry.fail_streak.saturating_add(1);
-            entry.last_seen = now;
-            entry.blocked_until = now + auth_probe_backoff(entry.fail_streak);
-        }
-    };
-
-    match state.entry(peer_ip) {
-        Entry::Occupied(mut entry) => {
-            update_existing(entry.get_mut());
-            return;
-        }
-        Entry::Vacant(_) => {}
-    }
-
-    if state.len() >= AUTH_PROBE_TRACK_MAX_ENTRIES {
-        let mut rounds = 0usize;
-        while state.len() >= AUTH_PROBE_TRACK_MAX_ENTRIES {
-            rounds += 1;
-            if rounds > 8 {
-                auth_probe_note_saturation(now);
-                let mut eviction_candidate: Option<(IpAddr, u32, Instant)> = None;
-                for entry in state.iter().take(AUTH_PROBE_PRUNE_SCAN_LIMIT) {
-                    let key = *entry.key();
-                    let fail_streak = entry.value().fail_streak;
-                    let last_seen = entry.value().last_seen;
-                    match eviction_candidate {
-                        Some((_, current_fail, current_seen))
-                            if fail_streak > current_fail
-                                || (fail_streak == current_fail && last_seen >= current_seen) =>
-                        {
-                        }
-                        _ => eviction_candidate = Some((key, fail_streak, last_seen)),
-                    }
-                }
-
-                let Some((evict_key, _, _)) = eviction_candidate else {
-                    return;
-                };
-                state.remove(&evict_key);
-                break;
-            }
-
-            let mut stale_keys = Vec::new();
-            let mut eviction_candidate: Option<(IpAddr, u32, Instant)> = None;
-            let state_len = state.len();
-            let scan_limit = state_len.min(AUTH_PROBE_PRUNE_SCAN_LIMIT);
-            let start_offset = if state_len == 0 {
-                0
-            } else {
-                auth_probe_eviction_offset(peer_ip, now) % state_len
-            };
-
-            let mut scanned = 0usize;
-            for entry in state.iter().skip(start_offset) {
-                let key = *entry.key();
-                let fail_streak = entry.value().fail_streak;
-                let last_seen = entry.value().last_seen;
-                match eviction_candidate {
-                    Some((_, current_fail, current_seen))
-                        if fail_streak > current_fail
-                            || (fail_streak == current_fail && last_seen >= current_seen) =>
-                    {
-                    }
-                    _ => eviction_candidate = Some((key, fail_streak, last_seen)),
-                }
-                if auth_probe_state_expired(entry.value(), now) {
-                    stale_keys.push(key);
-                }
-                scanned += 1;
-                if scanned >= scan_limit {
-                    break;
-                }
-            }
-
-            if scanned < scan_limit {
-                for entry in state.iter().take(scan_limit - scanned) {
-                    let key = *entry.key();
-                    let fail_streak = entry.value().fail_streak;
-                    let last_seen = entry.value().last_seen;
-                    match eviction_candidate {
-                        Some((_, current_fail, current_seen))
-                            if fail_streak > current_fail
-                                || (fail_streak == current_fail && last_seen >= current_seen) =>
-                        {
-                        }
-                        _ => eviction_candidate = Some((key, fail_streak, last_seen)),
-                    }
-                    if auth_probe_state_expired(entry.value(), now) {
-                        stale_keys.push(key);
-                    }
-                }
-            }
-
-            for stale_key in stale_keys {
-                state.remove(&stale_key);
-            }
-
-            if state.len() < AUTH_PROBE_TRACK_MAX_ENTRIES {
-                break;
-            }
-
-            let Some((evict_key, _, _)) = eviction_candidate else {
-                auth_probe_note_saturation(now);
-                return;
-            };
-            state.remove(&evict_key);
-            auth_probe_note_saturation(now);
-        }
-    }
-
-    match state.entry(peer_ip) {
-        Entry::Occupied(mut entry) => {
-            update_existing(entry.get_mut());
-        }
-        Entry::Vacant(entry) => {
-            entry.insert(make_new_state());
-        }
-    }
-}
-
-fn auth_probe_record_success(peer_ip: IpAddr) {
-    let peer_ip = normalize_auth_probe_ip(peer_ip);
-    let state = auth_probe_state_map();
-    state.remove(&peer_ip);
-}
-
-#[cfg(test)]
-fn clear_auth_probe_state_for_testing() {
-    if let Some(state) = AUTH_PROBE_STATE.get() {
-        state.clear();
-    }
-    if let Some(saturation) = AUTH_PROBE_SATURATION_STATE.get()
-        && let Ok(mut guard) = saturation.lock()
-    {
-        *guard = None;
-    }
-}
-
-#[cfg(test)]
-fn auth_probe_fail_streak_for_testing(peer_ip: IpAddr) -> Option<u32> {
-    let peer_ip = normalize_auth_probe_ip(peer_ip);
-    let state = AUTH_PROBE_STATE.get()?;
-    state.get(&peer_ip).map(|entry| entry.fail_streak)
-}
-
-#[cfg(test)]
-fn auth_probe_is_throttled_for_testing(peer_ip: IpAddr) -> bool {
-    auth_probe_is_throttled(peer_ip, Instant::now())
-}
-
-#[cfg(test)]
-fn auth_probe_saturation_is_throttled_for_testing() -> bool {
-    auth_probe_saturation_is_throttled(Instant::now())
-}
-
-#[cfg(test)]
-fn auth_probe_saturation_is_throttled_at_for_testing(now: Instant) -> bool {
-    auth_probe_saturation_is_throttled(now)
-}
-
-#[cfg(test)]
-fn auth_probe_test_lock() -> &'static Mutex<()> {
-    static TEST_LOCK: OnceLock<Mutex<()>> = OnceLock::new();
-    TEST_LOCK.get_or_init(|| Mutex::new(()))
-}
-
-#[cfg(test)]
-fn clear_warned_secrets_for_testing() {
-    if let Some(warned) = INVALID_SECRET_WARNED.get()
-        && let Ok(mut guard) = warned.lock()
-    {
-        guard.clear();
-    }
-}
-
-#[cfg(test)]
-fn warned_secrets_test_lock() -> &'static Mutex<()> {
-    static TEST_LOCK: OnceLock<Mutex<()>> = OnceLock::new();
-    TEST_LOCK.get_or_init(|| Mutex::new(()))
-}
-
-fn warn_invalid_secret_once(name: &str, reason: &str, expected: usize, got: Option<usize>) {
-    let key = (name.to_string(), reason.to_string());
-    let warned = INVALID_SECRET_WARNED.get_or_init(|| Mutex::new(HashSet::new()));
-    let should_warn = match warned.lock() {
-        Ok(mut guard) => {
-            if !guard.contains(&key) && guard.len() >= WARNED_SECRET_MAX_ENTRIES {
-                false
-            } else {
-                guard.insert(key)
-            }
-        }
-        Err(_) => true,
-    };
-
-    if !should_warn {
-        return;
-    }
-
-    match got {
-        Some(actual) => {
-            warn!(
-                user = %name,
-                expected = expected,
-                got = actual,
-                "Skipping user: access secret has unexpected length"
-            );
-        }
-        None => {
-            warn!(
-                user = %name,
-                "Skipping user: access secret is not valid hex"
-            );
-        }
-    }
-}
-
-fn decode_user_secret(name: &str, secret_hex: &str) -> Option<Vec<u8>> {
-    match hex::decode(secret_hex) {
-        Ok(bytes) if bytes.len() == ACCESS_SECRET_BYTES => Some(bytes),
-        Ok(bytes) => {
-            warn_invalid_secret_once(
-                name,
-                "invalid_length",
-                ACCESS_SECRET_BYTES,
-                Some(bytes.len()),
-            );
-            None
-        }
-        Err(_) => {
-            warn_invalid_secret_once(name, "invalid_hex", ACCESS_SECRET_BYTES, None);
-            None
-        }
-    }
-}
-
-// Decide whether a client-supplied proto tag is allowed given the configured
-// proxy modes and the transport that carried the handshake.
-//
-// A common mistake is to treat `modes.tls` and `modes.secure` as interchangeable
-// even though they correspond to different transport profiles: `modes.tls` is
-// for the TLS-fronted (EE-TLS) path, while `modes.secure` is for direct MTProto
-// over TCP (DD). Enforcing this separation prevents an attacker from using a
-// TLS-capable client to bypass the operator intent for the direct MTProto mode,
-// and vice versa.
-fn mode_enabled_for_proto(config: &ProxyConfig, proto_tag: ProtoTag, is_tls: bool) -> bool {
-    match proto_tag {
-        ProtoTag::Secure => {
-            if is_tls {
-                config.general.modes.tls
-            } else {
-                config.general.modes.secure
-            }
-        }
-        ProtoTag::Intermediate | ProtoTag::Abridged => config.general.modes.classic,
-    }
-}
-
 fn decode_user_secrets(
    config: &ProxyConfig,
    preferred_user: Option<&str>,
@@ -491,7 +27,7 @@ fn decode_user_secrets(

    if let Some(preferred) = preferred_user
        && let Some(secret_hex) = config.access.users.get(preferred)
-        && let Some(bytes) = decode_user_secret(preferred, secret_hex)
+        && let Ok(bytes) = hex::decode(secret_hex)
    {
        secrets.push((preferred.to_string(), bytes));
    }
@@ -500,7 +36,7 @@ fn decode_user_secrets(
        if preferred_user.is_some_and(|preferred| preferred == name.as_str()) {
            continue;
        }
-        if let Some(bytes) = decode_user_secret(name, secret_hex) {
+        if let Ok(bytes) = hex::decode(secret_hex) {
            secrets.push((name.clone(), bytes));
        }
    }
@@ -508,29 +44,11 @@ fn decode_user_secrets(
    secrets
 }

-async fn maybe_apply_server_hello_delay(config: &ProxyConfig) {
-    if config.censorship.server_hello_delay_max_ms == 0 {
-        return;
-    }
-
-    let min = config.censorship.server_hello_delay_min_ms;
-    let max = config.censorship.server_hello_delay_max_ms.max(min);
-    let delay_ms = if max == min {
-        max
-    } else {
-        rand::rng().random_range(min..=max)
-    };
-
-    if delay_ms > 0 {
-        tokio::time::sleep(Duration::from_millis(delay_ms)).await;
-    }
-}
-
 /// Result of successful handshake
 ///
 /// Key material (`dec_key`, `dec_iv`, `enc_key`, `enc_iv`) is
 /// zeroized on drop.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct HandshakeSuccess {
    /// Authenticated user name
    pub user: String,
@@ -547,7 +65,6 @@ pub struct HandshakeSuccess {
    /// Client address
    pub peer: SocketAddr,
    /// Whether TLS was used
-    
    pub is_tls: bool,
 }

@@ -577,33 +94,28 @@ where
 {
    debug!(peer = %peer, handshake_len = handshake.len(), "Processing TLS handshake");

-    let throttle_now = Instant::now();
-    if auth_probe_should_apply_preauth_throttle(peer.ip(), throttle_now) {
-        maybe_apply_server_hello_delay(config).await;
-        debug!(peer = %peer, "TLS handshake rejected by pre-auth probe throttle");
-        return HandshakeResult::BadClient { reader, writer };
-    }
-
    if handshake.len() < tls::TLS_DIGEST_POS + tls::TLS_DIGEST_LEN + 1 {
-        auth_probe_record_failure(peer.ip(), Instant::now());
-        maybe_apply_server_hello_delay(config).await;
        debug!(peer = %peer, "TLS handshake too short");
        return HandshakeResult::BadClient { reader, writer };
    }

-    let client_sni = tls::extract_sni_from_client_hello(handshake);
-    let secrets = decode_user_secrets(config, client_sni.as_deref());
+    let digest = &handshake[tls::TLS_DIGEST_POS..tls::TLS_DIGEST_POS + tls::TLS_DIGEST_LEN];
+    let digest_half = &digest[..tls::TLS_DIGEST_HALF_LEN];

-    let validation = match tls::validate_tls_handshake_with_replay_window(
+    if replay_checker.check_and_add_tls_digest(digest_half) {
+        warn!(peer = %peer, "TLS replay attack detected (duplicate digest)");
+        return HandshakeResult::BadClient { reader, writer };
+    }
+
+    let secrets = decode_user_secrets(config, None);
+
+    let validation = match tls::validate_tls_handshake(
        handshake,
        &secrets,
        config.access.ignore_time_skew,
-        config.access.replay_window_secs,
    ) {
        Some(v) => v,
        None => {
-            auth_probe_record_failure(peer.ip(), Instant::now());
-            maybe_apply_server_hello_delay(config).await;
            debug!(
                peer = %peer, 
                ignore_time_skew = config.access.ignore_time_skew,
@@ -613,29 +125,16 @@ where
        }
    };

-    // Replay tracking is applied only after successful authentication to avoid
-    // letting unauthenticated probes evict valid entries from the replay cache.
-    let digest_half = &validation.digest[..tls::TLS_DIGEST_HALF_LEN];
-    if replay_checker.check_and_add_tls_digest(digest_half) {
-        auth_probe_record_failure(peer.ip(), Instant::now());
-        maybe_apply_server_hello_delay(config).await;
-        warn!(peer = %peer, "TLS replay attack detected (duplicate digest)");
-        return HandshakeResult::BadClient { reader, writer };
-    }
-
    let secret = match secrets.iter().find(|(name, _)| *name == validation.user) {
        Some((_, s)) => s,
-        None => {
-            maybe_apply_server_hello_delay(config).await;
-            return HandshakeResult::BadClient { reader, writer };
-        }
+        None => return HandshakeResult::BadClient { reader, writer },
    };

    let cached = if config.censorship.tls_emulation {
        if let Some(cache) = tls_cache.as_ref() {
-            let selected_domain = if let Some(sni) = client_sni.as_ref() {
+            let selected_domain = if let Some(sni) = tls::extract_sni_from_client_hello(handshake) {
                if cache.contains_domain(&sni).await {
-                    sni.clone()
+                    sni
                } else {
                    config.censorship.tls_domain.clone()
                }
@@ -667,10 +166,6 @@ where
            Some(b"h2".to_vec())
        } else if alpn_list.iter().any(|p| p == b"http/1.1") {
            Some(b"http/1.1".to_vec())
-        } else if !alpn_list.is_empty() {
-            maybe_apply_server_hello_delay(config).await;
-            debug!(peer = %peer, "Client ALPN list has no supported protocol; using masking fallback");
-            return HandshakeResult::BadClient { reader, writer };
        } else {
            None
        }
@@ -701,9 +196,19 @@ where
        )
    };

-    // Apply the same optional delay budget used by reject paths to reduce
-    // distinguishability between success and fail-closed handshakes.
-    maybe_apply_server_hello_delay(config).await;
+    // Optional anti-fingerprint delay before sending ServerHello.
+    if config.censorship.server_hello_delay_max_ms > 0 {
+        let min = config.censorship.server_hello_delay_min_ms;
+        let max = config.censorship.server_hello_delay_max_ms.max(min);
+        let delay_ms = if max == min {
+            max
+        } else {
+            rand::rng().random_range(min..=max)
+        };
+        if delay_ms > 0 {
+            tokio::time::sleep(std::time::Duration::from_millis(delay_ms)).await;
+        }
+    }

    debug!(peer = %peer, response_len = response.len(), "Sending TLS ServerHello");

@@ -723,8 +228,6 @@ where
        "TLS handshake successful"
    );

-    auth_probe_record_success(peer.ip());
-
    HandshakeResult::Success((
        FakeTlsReader::new(reader),
        FakeTlsWriter::new(writer),
@@ -747,25 +250,15 @@ where
    R: AsyncRead + Unpin + Send,
    W: AsyncWrite + Unpin + Send,
 {
-    let handshake_fingerprint = {
-        let digest = sha256(&handshake[..8]);
-        hex::encode(&digest[..4])
-    };
-    trace!(
-        peer = %peer,
-        handshake_fingerprint = %handshake_fingerprint,
-        "MTProto handshake prefix"
-    );
-
-    let throttle_now = Instant::now();
-    if auth_probe_should_apply_preauth_throttle(peer.ip(), throttle_now) {
-        maybe_apply_server_hello_delay(config).await;
-        debug!(peer = %peer, "MTProto handshake rejected by pre-auth probe throttle");
-        return HandshakeResult::BadClient { reader, writer };
-    }
+    trace!(peer = %peer, handshake = ?hex::encode(handshake), "MTProto handshake bytes");

    let dec_prekey_iv = &handshake[SKIP_LEN..SKIP_LEN + PREKEY_LEN + IV_LEN];

+    if replay_checker.check_and_add_handshake(dec_prekey_iv) {
+        warn!(peer = %peer, "MTProto replay attack detected");
+        return HandshakeResult::BadClient { reader, writer };
+    }
+
    let enc_prekey_iv: Vec<u8> = dec_prekey_iv.iter().rev().copied().collect();

    let decoded_users = decode_user_secrets(config, preferred_user);
@@ -775,66 +268,57 @@ where
        let dec_prekey = &dec_prekey_iv[..PREKEY_LEN];
        let dec_iv_bytes = &dec_prekey_iv[PREKEY_LEN..];

-        let mut dec_key_input = Zeroizing::new(Vec::with_capacity(PREKEY_LEN + secret.len()));
+        let mut dec_key_input = Vec::with_capacity(PREKEY_LEN + secret.len());
        dec_key_input.extend_from_slice(dec_prekey);
        dec_key_input.extend_from_slice(&secret);
        let dec_key = sha256(&dec_key_input);

-        let mut dec_iv_arr = [0u8; IV_LEN];
-        dec_iv_arr.copy_from_slice(dec_iv_bytes);
-        let dec_iv = u128::from_be_bytes(dec_iv_arr);
+        let dec_iv = u128::from_be_bytes(dec_iv_bytes.try_into().unwrap());

        let mut decryptor = AesCtr::new(&dec_key, dec_iv);
        let decrypted = decryptor.decrypt(handshake);

-        let tag_bytes: [u8; 4] = [
-            decrypted[PROTO_TAG_POS],
-            decrypted[PROTO_TAG_POS + 1],
-            decrypted[PROTO_TAG_POS + 2],
-            decrypted[PROTO_TAG_POS + 3],
-        ];
+        let tag_bytes: [u8; 4] = decrypted[PROTO_TAG_POS..PROTO_TAG_POS + 4]
+            .try_into()
+            .unwrap();

        let proto_tag = match ProtoTag::from_bytes(tag_bytes) {
            Some(tag) => tag,
            None => continue,
        };

-        let mode_ok = mode_enabled_for_proto(config, proto_tag, is_tls);
+        let mode_ok = match proto_tag {
+            ProtoTag::Secure => {
+                if is_tls {
+                    config.general.modes.tls || config.general.modes.secure
+                } else {
+                    config.general.modes.secure || config.general.modes.tls
+                }
+            }
+            ProtoTag::Intermediate | ProtoTag::Abridged => config.general.modes.classic,
+        };

        if !mode_ok {
            debug!(peer = %peer, user = %user, proto = ?proto_tag, "Mode not enabled");
            continue;
        }

-        let dc_idx = i16::from_le_bytes([decrypted[DC_IDX_POS], decrypted[DC_IDX_POS + 1]]);
+        let dc_idx = i16::from_le_bytes(
+            decrypted[DC_IDX_POS..DC_IDX_POS + 2].try_into().unwrap()
+        );

        let enc_prekey = &enc_prekey_iv[..PREKEY_LEN];
        let enc_iv_bytes = &enc_prekey_iv[PREKEY_LEN..];

-        let mut enc_key_input = Zeroizing::new(Vec::with_capacity(PREKEY_LEN + secret.len()));
+        let mut enc_key_input = Vec::with_capacity(PREKEY_LEN + secret.len());
        enc_key_input.extend_from_slice(enc_prekey);
        enc_key_input.extend_from_slice(&secret);
        let enc_key = sha256(&enc_key_input);

-        let mut enc_iv_arr = [0u8; IV_LEN];
-        enc_iv_arr.copy_from_slice(enc_iv_bytes);
-        let enc_iv = u128::from_be_bytes(enc_iv_arr);
+        let enc_iv = u128::from_be_bytes(enc_iv_bytes.try_into().unwrap());

        let encryptor = AesCtr::new(&enc_key, enc_iv);

-// Apply replay tracking only after successful authentication.
-    //
-    // This ordering prevents an attacker from producing invalid handshakes that
-    // still collide with a valid handshake's replay slot and thus evict a valid
-    // entry from the cache. We accept the cost of performing the full
-    // authentication check first to avoid poisoning the replay cache.
-        if replay_checker.check_and_add_handshake(dec_prekey_iv) {
-            auth_probe_record_failure(peer.ip(), Instant::now());
-            maybe_apply_server_hello_delay(config).await;
-            warn!(peer = %peer, user = %user, "MTProto replay attack detected");
-            return HandshakeResult::BadClient { reader, writer };
-        }
-
        let success = HandshakeSuccess {
            user: user.clone(),
            dc_idx,
@@ -856,8 +340,6 @@ where
            "MTProto handshake successful"
        );

-        auth_probe_record_success(peer.ip());
-
        let max_pending = config.general.crypto_pending_buffer;
        return HandshakeResult::Success((
            CryptoReader::new(reader, decryptor),
@@ -866,8 +348,6 @@ where
        ));
    }

-    auth_probe_record_failure(peer.ip(), Instant::now());
-    maybe_apply_server_hello_delay(config).await;
    debug!(peer = %peer, "MTProto handshake: no matching user found");
    HandshakeResult::BadClient { reader, writer }
 }
@@ -876,6 +356,8 @@ where
 pub fn generate_tg_nonce(
    proto_tag: ProtoTag, 
    dc_idx: i16,
+    _client_dec_key: &[u8; 32],
+    _client_dec_iv: u128,
    client_enc_key: &[u8; 32],
    client_enc_iv: u128,
    rng: &SecureRandom,
@@ -883,16 +365,14 @@ pub fn generate_tg_nonce(
 ) -> ([u8; HANDSHAKE_LEN], [u8; 32], u128, [u8; 32], u128) {
    loop {
        let bytes = rng.bytes(HANDSHAKE_LEN);
-        let Ok(mut nonce): Result<[u8; HANDSHAKE_LEN], _> = bytes.try_into() else {
-            continue;
-        };
+        let mut nonce: [u8; HANDSHAKE_LEN] = bytes.try_into().unwrap();

        if RESERVED_NONCE_FIRST_BYTES.contains(&nonce[0]) { continue; }

-        let first_four: [u8; 4] = [nonce[0], nonce[1], nonce[2], nonce[3]];
+        let first_four: [u8; 4] = nonce[..4].try_into().unwrap();
        if RESERVED_NONCE_BEGINNINGS.contains(&first_four) { continue; }

-        let continue_four: [u8; 4] = [nonce[4], nonce[5], nonce[6], nonce[7]];
+        let continue_four: [u8; 4] = nonce[4..8].try_into().unwrap();
        if RESERVED_NONCE_CONTINUES.contains(&continue_four) { continue; }

        nonce[PROTO_TAG_POS..PROTO_TAG_POS + 4].copy_from_slice(&proto_tag.to_bytes());
@@ -900,7 +380,7 @@ pub fn generate_tg_nonce(
        nonce[DC_IDX_POS..DC_IDX_POS + 2].copy_from_slice(&dc_idx.to_le_bytes());

        if fast_mode {
-            let mut key_iv = Zeroizing::new(Vec::with_capacity(KEY_LEN + IV_LEN));
+            let mut key_iv = Vec::with_capacity(KEY_LEN + IV_LEN);
            key_iv.extend_from_slice(client_enc_key);
            key_iv.extend_from_slice(&client_enc_iv.to_be_bytes());
            key_iv.reverse(); // Python/C behavior: reversed enc_key+enc_iv in nonce
@@ -908,19 +388,13 @@ pub fn generate_tg_nonce(
        }

        let enc_key_iv = &nonce[SKIP_LEN..SKIP_LEN + KEY_LEN + IV_LEN];
-        let dec_key_iv = Zeroizing::new(enc_key_iv.iter().rev().copied().collect::<Vec<u8>>());
+        let dec_key_iv: Vec<u8> = enc_key_iv.iter().rev().copied().collect();

-        let mut tg_enc_key = [0u8; 32];
-        tg_enc_key.copy_from_slice(&enc_key_iv[..KEY_LEN]);
-        let mut tg_enc_iv_arr = [0u8; IV_LEN];
-        tg_enc_iv_arr.copy_from_slice(&enc_key_iv[KEY_LEN..]);
-        let tg_enc_iv = u128::from_be_bytes(tg_enc_iv_arr);
+        let tg_enc_key: [u8; 32] = enc_key_iv[..KEY_LEN].try_into().unwrap();
+        let tg_enc_iv = u128::from_be_bytes(enc_key_iv[KEY_LEN..].try_into().unwrap());

-        let mut tg_dec_key = [0u8; 32];
-        tg_dec_key.copy_from_slice(&dec_key_iv[..KEY_LEN]);
-        let mut tg_dec_iv_arr = [0u8; IV_LEN];
-        tg_dec_iv_arr.copy_from_slice(&dec_key_iv[KEY_LEN..]);
-        let tg_dec_iv = u128::from_be_bytes(tg_dec_iv_arr);
+        let tg_dec_key: [u8; 32] = dec_key_iv[..KEY_LEN].try_into().unwrap();
+        let tg_dec_iv = u128::from_be_bytes(dec_key_iv[KEY_LEN..].try_into().unwrap());

        return (nonce, tg_enc_key, tg_enc_iv, tg_dec_key, tg_dec_iv);
    }
@@ -929,19 +403,13 @@ pub fn generate_tg_nonce(
 /// Encrypt nonce for sending to Telegram and return cipher objects with correct counter state
 pub fn encrypt_tg_nonce_with_ciphers(nonce: &[u8; HANDSHAKE_LEN]) -> (Vec<u8>, AesCtr, AesCtr) {
    let enc_key_iv = &nonce[SKIP_LEN..SKIP_LEN + KEY_LEN + IV_LEN];
-    let dec_key_iv = Zeroizing::new(enc_key_iv.iter().rev().copied().collect::<Vec<u8>>());
+    let dec_key_iv: Vec<u8> = enc_key_iv.iter().rev().copied().collect();

-    let mut enc_key = [0u8; 32];
-    enc_key.copy_from_slice(&enc_key_iv[..KEY_LEN]);
-    let mut enc_iv_arr = [0u8; IV_LEN];
-    enc_iv_arr.copy_from_slice(&enc_key_iv[KEY_LEN..]);
-    let enc_iv = u128::from_be_bytes(enc_iv_arr);
+    let enc_key: [u8; 32] = enc_key_iv[..KEY_LEN].try_into().unwrap();
+    let enc_iv = u128::from_be_bytes(enc_key_iv[KEY_LEN..].try_into().unwrap());

-    let mut dec_key = [0u8; 32];
-    dec_key.copy_from_slice(&dec_key_iv[..KEY_LEN]);
-    let mut dec_iv_arr = [0u8; IV_LEN];
-    dec_iv_arr.copy_from_slice(&dec_key_iv[KEY_LEN..]);
-    let dec_iv = u128::from_be_bytes(dec_iv_arr);
+    let dec_key: [u8; 32] = dec_key_iv[..KEY_LEN].try_into().unwrap();
+    let dec_iv = u128::from_be_bytes(dec_key_iv[KEY_LEN..].try_into().unwrap());

    let mut encryptor = AesCtr::new(&enc_key, enc_iv);
    let encrypted_full = encryptor.encrypt(nonce);  // counter: 0 → 4
@@ -950,33 +418,91 @@ pub fn encrypt_tg_nonce_with_ciphers(nonce: &[u8; HANDSHAKE_LEN]) -> (Vec<u8>, A
    result.extend_from_slice(&encrypted_full[PROTO_TAG_POS..]);

    let decryptor = AesCtr::new(&dec_key, dec_iv);
-    enc_key.zeroize();
-    dec_key.zeroize();

    (result, encryptor, decryptor)
 }

 /// Encrypt nonce for sending to Telegram (legacy function for compatibility)
-
 pub fn encrypt_tg_nonce(nonce: &[u8; HANDSHAKE_LEN]) -> Vec<u8> {
    let (encrypted, _, _) = encrypt_tg_nonce_with_ciphers(nonce);
    encrypted
 }

 #[cfg(test)]
-#[path = "handshake_security_tests.rs"]
-mod security_tests;
+mod tests {
+    use super::*;

-#[cfg(test)]
-#[path = "handshake_gap_short_tls_probe_throttle_security_tests.rs"]
-mod gap_short_tls_probe_throttle_security_tests;
+    #[test]
+    fn test_generate_tg_nonce() {
+        let client_dec_key = [0x42u8; 32];
+        let client_dec_iv = 12345u128;
+        let client_enc_key = [0x24u8; 32];
+        let client_enc_iv = 54321u128;

-/// Compile-time guard: HandshakeSuccess holds cryptographic key material and
-/// must never be Copy.  A Copy impl would allow silent key duplication,
-/// undermining the zeroize-on-drop guarantee.
-mod compile_time_security_checks {
-    use super::HandshakeSuccess;
-    use static_assertions::assert_not_impl_all;
+        let rng = SecureRandom::new();
+        let (nonce, _tg_enc_key, _tg_enc_iv, _tg_dec_key, _tg_dec_iv) = 
+            generate_tg_nonce(
+                ProtoTag::Secure,
+                2,
+                &client_dec_key,
+                client_dec_iv,
+                &client_enc_key,
+                client_enc_iv,
+                &rng,
+                false,
+            );

-    assert_not_impl_all!(HandshakeSuccess: Copy, Clone);
+        assert_eq!(nonce.len(), HANDSHAKE_LEN);
+
+        let tag_bytes: [u8; 4] = nonce[PROTO_TAG_POS..PROTO_TAG_POS + 4].try_into().unwrap();
+        assert_eq!(ProtoTag::from_bytes(tag_bytes), Some(ProtoTag::Secure));
+    }
+
+    #[test]
+    fn test_encrypt_tg_nonce() {
+        let client_dec_key = [0x42u8; 32];
+        let client_dec_iv = 12345u128;
+        let client_enc_key = [0x24u8; 32];
+        let client_enc_iv = 54321u128;
+
+        let rng = SecureRandom::new();
+        let (nonce, _, _, _, _) = 
+            generate_tg_nonce(
+                ProtoTag::Secure,
+                2,
+                &client_dec_key,
+                client_dec_iv,
+                &client_enc_key,
+                client_enc_iv,
+                &rng,
+                false,
+            );
+
+        let encrypted = encrypt_tg_nonce(&nonce);
+
+        assert_eq!(encrypted.len(), HANDSHAKE_LEN);
+        assert_eq!(&encrypted[..PROTO_TAG_POS], &nonce[..PROTO_TAG_POS]);
+        assert_ne!(&encrypted[PROTO_TAG_POS..], &nonce[PROTO_TAG_POS..]);
+    }
+
+    #[test]
+    fn test_handshake_success_zeroize_on_drop() {
+        let success = HandshakeSuccess {
+            user: "test".to_string(),
+            dc_idx: 2,
+            proto_tag: ProtoTag::Secure,
+            dec_key: [0xAA; 32],
+            dec_iv: 0xBBBBBBBB,
+            enc_key: [0xCC; 32],
+            enc_iv: 0xDDDDDDDD,
+            peer: "127.0.0.1:1234".parse().unwrap(),
+            is_tls: true,
+        };
+
+        assert_eq!(success.dec_key, [0xAA; 32]);
+        assert_eq!(success.enc_key, [0xCC; 32]);
+
+        drop(success);
+        // Drop impl zeroizes key material without panic
+    }
 }
@@ -1,50 +0,0 @@
-use super::*;
-use crate::stats::ReplayChecker;
-use std::net::SocketAddr;
-use std::time::Duration;
-
-fn test_config_with_secret_hex(secret_hex: &str) -> ProxyConfig {
-    let mut cfg = ProxyConfig::default();
-    cfg.access.users.clear();
-    cfg.access
-        .users
-        .insert("user".to_string(), secret_hex.to_string());
-    cfg.access.ignore_time_skew = true;
-    cfg
-}
-
-#[tokio::test]
-async fn gap_t01_short_tls_probe_burst_is_throttled() {
-    let _guard = auth_probe_test_lock()
-        .lock()
-        .unwrap_or_else(|poisoned| poisoned.into_inner());
-    clear_auth_probe_state_for_testing();
-
-    let config = test_config_with_secret_hex("11111111111111111111111111111111");
-    let replay_checker = ReplayChecker::new(128, Duration::from_secs(60));
-    let rng = SecureRandom::new();
-    let peer: SocketAddr = "198.51.100.171:44361".parse().unwrap();
-
-    let too_short = vec![0x16, 0x03, 0x01];
-
-    for _ in 0..AUTH_PROBE_BACKOFF_START_FAILS {
-        let result = handle_tls_handshake(
-            &too_short,
-            tokio::io::empty(),
-            tokio::io::sink(),
-            peer,
-            &config,
-            &replay_checker,
-            &rng,
-            None,
-        )
-        .await;
-        assert!(matches!(result, HandshakeResult::BadClient { .. }));
-    }
-
-    assert!(
-        auth_probe_fail_streak_for_testing(peer.ip())
-            .is_some_and(|streak| streak >= AUTH_PROBE_BACKOFF_START_FAILS),
-        "short TLS probe bursts must increase auth-probe fail streak"
-    );
-}
@@ -7,90 +7,19 @@ use tokio::net::TcpStream;
 #[cfg(unix)]
 use tokio::net::UnixStream;
 use tokio::io::{AsyncRead, AsyncWrite, AsyncReadExt, AsyncWriteExt};
-use tokio::time::{Instant, timeout};
+use tokio::time::timeout;
 use tracing::debug;
 use crate::config::ProxyConfig;
 use crate::network::dns_overrides::resolve_socket_addr;
 use crate::stats::beobachten::BeobachtenStore;
 use crate::transport::proxy_protocol::{ProxyProtocolV1Builder, ProxyProtocolV2Builder};

-#[cfg(not(test))]
 const MASK_TIMEOUT: Duration = Duration::from_secs(5);
-#[cfg(test)]
-const MASK_TIMEOUT: Duration = Duration::from_millis(50);
 /// Maximum duration for the entire masking relay.
 /// Limits resource consumption from slow-loris attacks and port scanners.
-#[cfg(not(test))]
 const MASK_RELAY_TIMEOUT: Duration = Duration::from_secs(60);
-#[cfg(test)]
-const MASK_RELAY_TIMEOUT: Duration = Duration::from_millis(200);
-#[cfg(not(test))]
-const MASK_RELAY_IDLE_TIMEOUT: Duration = Duration::from_secs(5);
-#[cfg(test)]
-const MASK_RELAY_IDLE_TIMEOUT: Duration = Duration::from_millis(100);
 const MASK_BUFFER_SIZE: usize = 8192;

-async fn copy_with_idle_timeout<R, W>(reader: &mut R, writer: &mut W)
-where
-    R: AsyncRead + Unpin,
-    W: AsyncWrite + Unpin,
-{
-    let mut buf = [0u8; MASK_BUFFER_SIZE];
-    loop {
-        let read_res = timeout(MASK_RELAY_IDLE_TIMEOUT, reader.read(&mut buf)).await;
-        let n = match read_res {
-            Ok(Ok(n)) => n,
-            Ok(Err(_)) | Err(_) => break,
-        };
-        if n == 0 {
-            break;
-        }
-
-        let write_res = timeout(MASK_RELAY_IDLE_TIMEOUT, writer.write_all(&buf[..n])).await;
-        match write_res {
-            Ok(Ok(())) => {}
-            Ok(Err(_)) | Err(_) => break,
-        }
-    }
-}
-
-async fn write_proxy_header_with_timeout<W>(mask_write: &mut W, header: &[u8]) -> bool
-where
-    W: AsyncWrite + Unpin,
-{
-    match timeout(MASK_TIMEOUT, mask_write.write_all(header)).await {
-        Ok(Ok(())) => true,
-        Ok(Err(_)) => false,
-        Err(_) => {
-            debug!("Timeout writing proxy protocol header to mask backend");
-            false
-        }
-    }
-}
-
-async fn consume_client_data_with_timeout<R>(reader: R)
-where
-    R: AsyncRead + Unpin,
-{
-    if timeout(MASK_RELAY_TIMEOUT, consume_client_data(reader)).await.is_err() {
-        debug!("Timed out while consuming client data on masking fallback path");
-    }
-}
-
-async fn wait_mask_connect_budget(started: Instant) {
-    let elapsed = started.elapsed();
-    if elapsed < MASK_TIMEOUT {
-        tokio::time::sleep(MASK_TIMEOUT - elapsed).await;
-    }
-}
-
-async fn wait_mask_outcome_budget(started: Instant) {
-    let elapsed = started.elapsed();
-    if elapsed < MASK_TIMEOUT {
-        tokio::time::sleep(MASK_TIMEOUT - elapsed).await;
-    }
-}
-
 /// Detect client type based on initial data
 fn detect_client_type(data: &[u8]) -> &'static str {
    // Check for HTTP request
@@ -142,15 +71,13 @@ where

    if !config.censorship.mask {
        // Masking disabled, just consume data
-        consume_client_data_with_timeout(reader).await;
+        consume_client_data(reader).await;
        return;
    }

    // Connect via Unix socket or TCP
    #[cfg(unix)]
    if let Some(ref sock_path) = config.censorship.mask_unix_sock {
-        let outcome_started = Instant::now();
-        let connect_started = Instant::now();
        debug!(
            client_type = client_type,
            sock = %sock_path,
@@ -180,26 +107,21 @@ where
                    }
                };
                if let Some(header) = proxy_header {
-                    if !write_proxy_header_with_timeout(&mut mask_write, &header).await {
-                        wait_mask_outcome_budget(outcome_started).await;
+                    if mask_write.write_all(&header).await.is_err() {
                        return;
                    }
                }
                if timeout(MASK_RELAY_TIMEOUT, relay_to_mask(reader, writer, mask_read, mask_write, initial_data)).await.is_err() {
                    debug!("Mask relay timed out (unix socket)");
                }
-                wait_mask_outcome_budget(outcome_started).await;
            }
            Ok(Err(e)) => {
-                wait_mask_connect_budget(connect_started).await;
                debug!(error = %e, "Failed to connect to mask unix socket");
-                consume_client_data_with_timeout(reader).await;
-                wait_mask_outcome_budget(outcome_started).await;
+                consume_client_data(reader).await;
            }
            Err(_) => {
                debug!("Timeout connecting to mask unix socket");
-                consume_client_data_with_timeout(reader).await;
-                wait_mask_outcome_budget(outcome_started).await;
+                consume_client_data(reader).await;
            }
        }
        return;
@@ -221,8 +143,6 @@ where
    let mask_addr = resolve_socket_addr(mask_host, mask_port)
        .map(|addr| addr.to_string())
        .unwrap_or_else(|| format!("{}:{}", mask_host, mask_port));
-    let outcome_started = Instant::now();
-    let connect_started = Instant::now();
    let connect_result = timeout(MASK_TIMEOUT, TcpStream::connect(&mask_addr)).await;
    match connect_result {
        Ok(Ok(stream)) => {
@@ -246,26 +166,21 @@ where

            let (mask_read, mut mask_write) = stream.into_split();
            if let Some(header) = proxy_header {
-                if !write_proxy_header_with_timeout(&mut mask_write, &header).await {
-                    wait_mask_outcome_budget(outcome_started).await;
+                if mask_write.write_all(&header).await.is_err() {
                    return;
                }
            }
            if timeout(MASK_RELAY_TIMEOUT, relay_to_mask(reader, writer, mask_read, mask_write, initial_data)).await.is_err() {
                debug!("Mask relay timed out");
            }
-            wait_mask_outcome_budget(outcome_started).await;
        }
        Ok(Err(e)) => {
-            wait_mask_connect_budget(connect_started).await;
            debug!(error = %e, "Failed to connect to mask host");
-            consume_client_data_with_timeout(reader).await;
-            wait_mask_outcome_budget(outcome_started).await;
+            consume_client_data(reader).await;
        }
        Err(_) => {
            debug!("Timeout connecting to mask host");
-            consume_client_data_with_timeout(reader).await;
-            wait_mask_outcome_budget(outcome_started).await;
+            consume_client_data(reader).await;
        }
    }
 }
@@ -288,20 +203,47 @@ where
    if mask_write.write_all(initial_data).await.is_err() {
        return;
    }
-    if mask_write.flush().await.is_err() {
-        return;
-    }

-    let _ = tokio::join!(
-        async {
-            copy_with_idle_timeout(&mut reader, &mut mask_write).await;
-            let _ = mask_write.shutdown().await;
-        },
-        async {
-            copy_with_idle_timeout(&mut mask_read, &mut writer).await;
-            let _ = writer.shutdown().await;
+    // Relay traffic
+    let c2m = tokio::spawn(async move {
+        let mut buf = vec![0u8; MASK_BUFFER_SIZE];
+        loop {
+            match reader.read(&mut buf).await {
+                Ok(0) | Err(_) => {
+                    let _ = mask_write.shutdown().await;
+                    break;
+                }
+                Ok(n) => {
+                    if mask_write.write_all(&buf[..n]).await.is_err() {
+                        break;
+                    }
+                }
+            }
        }
-    );
+    });
+
+    let m2c = tokio::spawn(async move {
+        let mut buf = vec![0u8; MASK_BUFFER_SIZE];
+        loop {
+            match mask_read.read(&mut buf).await {
+                Ok(0) | Err(_) => {
+                    let _ = writer.shutdown().await;
+                    break;
+                }
+                Ok(n) => {
+                    if writer.write_all(&buf[..n]).await.is_err() {
+                        break;
+                    }
+                }
+            }
+        }
+    });
+
+    // Wait for either to complete
+    tokio::select! {
+        _ = c2m => {}
+        _ = m2c => {}
+    }
 }

 /// Just consume all data from client without responding
@@ -313,7 +255,3 @@ async fn consume_client_data<R: AsyncRead + Unpin>(mut reader: R) {
        }
    }
 }
-
-#[cfg(test)]
-#[path = "masking_security_tests.rs"]
-mod security_tests;
@@ -1,15 +1,14 @@
-use std::collections::hash_map::RandomState;
-use std::hash::BuildHasher;
+use std::collections::HashMap;
+use std::collections::hash_map::DefaultHasher;
 use std::hash::{Hash, Hasher};
 use std::net::{IpAddr, SocketAddr};
-use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
+use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::{Arc, Mutex, OnceLock};
 use std::time::{Duration, Instant};

-use dashmap::DashMap;
+use bytes::Bytes;
 use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
-use tokio::sync::{mpsc, oneshot, watch, Mutex as AsyncMutex};
-use tokio::time::timeout;
+use tokio::sync::{mpsc, oneshot, watch};
 use tracing::{debug, trace, warn};

 use crate::config::ProxyConfig;
@@ -21,38 +20,25 @@ use crate::proxy::route_mode::{
    RelayRouteMode, RouteCutoverState, ROUTE_SWITCH_ERROR_MSG, affected_cutover_state,
    cutover_stagger_delay,
 };
+use crate::proxy::adaptive_buffers::{self, AdaptiveTier};
+use crate::proxy::session_eviction::SessionLease;
 use crate::stats::Stats;
-use crate::stream::{BufferPool, CryptoReader, CryptoWriter, PooledBuffer};
+use crate::stream::{BufferPool, CryptoReader, CryptoWriter};
 use crate::transport::middle_proxy::{MePool, MeResponse, proto_flags_for_tag};

 enum C2MeCommand {
-    Data { payload: PooledBuffer, flags: u32 },
+    Data { payload: Bytes, flags: u32 },
    Close,
 }

 const DESYNC_DEDUP_WINDOW: Duration = Duration::from_secs(60);
-const DESYNC_DEDUP_MAX_ENTRIES: usize = 65_536;
-const DESYNC_DEDUP_PRUNE_SCAN_LIMIT: usize = 1024;
-const DESYNC_FULL_CACHE_EMIT_MIN_INTERVAL: Duration = Duration::from_millis(1000);
 const DESYNC_ERROR_CLASS: &str = "frame_too_large_crypto_desync";
 const C2ME_CHANNEL_CAPACITY_FALLBACK: usize = 128;
 const C2ME_SOFT_PRESSURE_MIN_FREE_SLOTS: usize = 64;
 const C2ME_SENDER_FAIRNESS_BUDGET: usize = 32;
-#[cfg(test)]
-const C2ME_SEND_TIMEOUT: Duration = Duration::from_millis(50);
-#[cfg(not(test))]
-const C2ME_SEND_TIMEOUT: Duration = Duration::from_secs(5);
 const ME_D2C_FLUSH_BATCH_MAX_FRAMES_MIN: usize = 1;
 const ME_D2C_FLUSH_BATCH_MAX_BYTES_MIN: usize = 4096;
-#[cfg(test)]
-const QUOTA_USER_LOCKS_MAX: usize = 64;
-#[cfg(not(test))]
-const QUOTA_USER_LOCKS_MAX: usize = 4_096;
-static DESYNC_DEDUP: OnceLock<DashMap<u64, Instant>> = OnceLock::new();
-static DESYNC_HASHER: OnceLock<RandomState> = OnceLock::new();
-static DESYNC_FULL_CACHE_LAST_EMIT_AT: OnceLock<Mutex<Option<Instant>>> = OnceLock::new();
-static DESYNC_DEDUP_EVER_SATURATED: OnceLock<AtomicBool> = OnceLock::new();
-static QUOTA_USER_LOCKS: OnceLock<DashMap<String, Arc<AsyncMutex<()>>>> = OnceLock::new();
+static DESYNC_DEDUP: OnceLock<Mutex<HashMap<u64, Instant>>> = OnceLock::new();

 struct RelayForensicsState {
    trace_id: u64,
@@ -75,8 +61,8 @@ struct MeD2cFlushPolicy {
 }

 impl MeD2cFlushPolicy {
-    fn from_config(config: &ProxyConfig) -> Self {
-        Self {
+    fn from_config(config: &ProxyConfig, tier: AdaptiveTier) -> Self {
+        let base = Self {
            max_frames: config
                .general
                .me_d2c_flush_batch_max_frames
@@ -87,13 +73,24 @@ impl MeD2cFlushPolicy {
                .max(ME_D2C_FLUSH_BATCH_MAX_BYTES_MIN),
            max_delay: Duration::from_micros(config.general.me_d2c_flush_batch_max_delay_us),
            ack_flush_immediate: config.general.me_d2c_ack_flush_immediate,
+        };
+        let (max_frames, max_bytes, max_delay) = adaptive_buffers::me_flush_policy_for_tier(
+            tier,
+            base.max_frames,
+            base.max_bytes,
+            base.max_delay,
+        );
+        Self {
+            max_frames,
+            max_bytes,
+            max_delay,
+            ack_flush_immediate: base.ack_flush_immediate,
        }
    }
 }

 fn hash_value<T: Hash>(value: &T) -> u64 {
-    let state = DESYNC_HASHER.get_or_init(RandomState::new);
-    let mut hasher = state.build_hasher();
+    let mut hasher = DefaultHasher::new();
    value.hash(&mut hasher);
    hasher.finish()
 }
@@ -107,122 +104,26 @@ fn should_emit_full_desync(key: u64, all_full: bool, now: Instant) -> bool {
        return true;
    }

-    let dedup = DESYNC_DEDUP.get_or_init(DashMap::new);
-    let saturated_before = dedup.len() >= DESYNC_DEDUP_MAX_ENTRIES;
-    let ever_saturated = DESYNC_DEDUP_EVER_SATURATED.get_or_init(|| AtomicBool::new(false));
-    if saturated_before {
-        ever_saturated.store(true, Ordering::Relaxed);
-    }
+    let dedup = DESYNC_DEDUP.get_or_init(|| Mutex::new(HashMap::new()));
+    let mut guard = dedup.lock().expect("desync dedup mutex poisoned");
+    guard.retain(|_, seen_at| now.duration_since(*seen_at) < DESYNC_DEDUP_WINDOW);

-    if let Some(mut seen_at) = dedup.get_mut(&key) {
-        if now.duration_since(*seen_at) >= DESYNC_DEDUP_WINDOW {
-            *seen_at = now;
-            return true;
-        }
-        return false;
-    }
-
-    if dedup.len() >= DESYNC_DEDUP_MAX_ENTRIES {
-        let mut stale_keys = Vec::new();
-        let mut oldest_candidate: Option<(u64, Instant)> = None;
-        for entry in dedup.iter().take(DESYNC_DEDUP_PRUNE_SCAN_LIMIT) {
-            let key = *entry.key();
-            let seen_at = *entry.value();
-
-            match oldest_candidate {
-                Some((_, oldest_seen)) if seen_at >= oldest_seen => {}
-                _ => oldest_candidate = Some((key, seen_at)),
-            }
-
-            if now.duration_since(seen_at) >= DESYNC_DEDUP_WINDOW {
-                stale_keys.push(*entry.key());
-            }
-        }
-        for stale_key in stale_keys {
-            dedup.remove(&stale_key);
-        }
-        if dedup.len() >= DESYNC_DEDUP_MAX_ENTRIES {
-            let Some((evict_key, _)) = oldest_candidate else {
-                return false;
-            };
-            dedup.remove(&evict_key);
-            dedup.insert(key, now);
-            return should_emit_full_desync_full_cache(now);
-        }
-    }
-
-    dedup.insert(key, now);
-    let saturated_after = dedup.len() >= DESYNC_DEDUP_MAX_ENTRIES;
-    // Preserve the first sequential insert that reaches capacity as a normal
-    // emit, while still gating concurrent newcomer churn after the cache has
-    // ever been observed at saturation.
-    let was_ever_saturated = if saturated_after {
-        ever_saturated.swap(true, Ordering::Relaxed)
-    } else {
-        ever_saturated.load(Ordering::Relaxed)
-    };
-
-    if saturated_before || (saturated_after && was_ever_saturated) {
-        should_emit_full_desync_full_cache(now)
-    } else {
-        true
-    }
-}
-
-fn should_emit_full_desync_full_cache(now: Instant) -> bool {
-    let gate = DESYNC_FULL_CACHE_LAST_EMIT_AT.get_or_init(|| Mutex::new(None));
-    let Ok(mut last_emit_at) = gate.lock() else {
-        return false;
-    };
-
-    match *last_emit_at {
-        None => {
-            *last_emit_at = Some(now);
-            true
-        }
-        Some(last) => {
-            let Some(elapsed) = now.checked_duration_since(last) else {
-                *last_emit_at = Some(now);
-                return true;
-            };
-            if elapsed >= DESYNC_FULL_CACHE_EMIT_MIN_INTERVAL {
-                *last_emit_at = Some(now);
+    match guard.get_mut(&key) {
+        Some(seen_at) => {
+            if now.duration_since(*seen_at) >= DESYNC_DEDUP_WINDOW {
+                *seen_at = now;
                true
            } else {
                false
            }
        }
-    }
-}
-
-#[cfg(test)]
-fn clear_desync_dedup_for_testing() {
-    if let Some(dedup) = DESYNC_DEDUP.get() {
-        dedup.clear();
-    }
-    if let Some(ever_saturated) = DESYNC_DEDUP_EVER_SATURATED.get() {
-        ever_saturated.store(false, Ordering::Relaxed);
-    }
-    if let Some(last_emit_at) = DESYNC_FULL_CACHE_LAST_EMIT_AT.get() {
-        match last_emit_at.lock() {
-            Ok(mut guard) => {
-                *guard = None;
-            }
-            Err(poisoned) => {
-                let mut guard = poisoned.into_inner();
-                *guard = None;
-                last_emit_at.clear_poison();
-            }
+        None => {
+            guard.insert(key, now);
+            true
        }
    }
 }

-#[cfg(test)]
-fn desync_dedup_test_lock() -> &'static Mutex<()> {
-    static TEST_LOCK: OnceLock<Mutex<()>> = OnceLock::new();
-    TEST_LOCK.get_or_init(|| Mutex::new(()))
-}
-
 fn report_desync_frame_too_large(
    state: &RelayForensicsState,
    proto_tag: ProtoTag,
@@ -318,49 +219,10 @@ fn should_yield_c2me_sender(sent_since_yield: usize, has_backlog: bool) -> bool
    has_backlog && sent_since_yield >= C2ME_SENDER_FAIRNESS_BUDGET
 }

-fn quota_exceeded_for_user(stats: &Stats, user: &str, quota_limit: Option<u64>) -> bool {
-    quota_limit.is_some_and(|quota| stats.get_user_total_octets(user) >= quota)
-}
-
-fn quota_would_be_exceeded_for_user(
-    stats: &Stats,
-    user: &str,
-    quota_limit: Option<u64>,
-    bytes: u64,
-) -> bool {
-    quota_limit.is_some_and(|quota| {
-        let used = stats.get_user_total_octets(user);
-        used >= quota || bytes > quota.saturating_sub(used)
-    })
-}
-
-fn quota_user_lock(user: &str) -> Arc<AsyncMutex<()>> {
-    let locks = QUOTA_USER_LOCKS.get_or_init(DashMap::new);
-    if let Some(existing) = locks.get(user) {
-        return Arc::clone(existing.value());
-    }
-
-    if locks.len() >= QUOTA_USER_LOCKS_MAX {
-        locks.retain(|_, value| Arc::strong_count(value) > 1);
-    }
-
-    if locks.len() >= QUOTA_USER_LOCKS_MAX {
-        return Arc::new(AsyncMutex::new(()));
-    }
-
-    let created = Arc::new(AsyncMutex::new(()));
-    match locks.entry(user.to_string()) {
-        dashmap::mapref::entry::Entry::Occupied(entry) => Arc::clone(entry.get()),
-        dashmap::mapref::entry::Entry::Vacant(entry) => {
-            entry.insert(Arc::clone(&created));
-            created
-        }
-    }
-}
-
 async fn enqueue_c2me_command(
    tx: &mpsc::Sender<C2MeCommand>,
    cmd: C2MeCommand,
+    send_timeout: Duration,
 ) -> std::result::Result<(), mpsc::error::SendError<C2MeCommand>> {
    match tx.try_send(cmd) {
        Ok(()) => Ok(()),
@@ -370,7 +232,10 @@ async fn enqueue_c2me_command(
            if tx.capacity() <= C2ME_SOFT_PRESSURE_MIN_FREE_SLOTS {
                tokio::task::yield_now().await;
            }
-            match timeout(C2ME_SEND_TIMEOUT, tx.reserve()).await {
+            if send_timeout.is_zero() {
+                return tx.send(cmd).await;
+            }
+            match tokio::time::timeout(send_timeout, tx.reserve()).await {
                Ok(Ok(permit)) => {
                    permit.send(cmd);
                    Ok(())
@@ -389,22 +254,23 @@ pub(crate) async fn handle_via_middle_proxy<R, W>(
    me_pool: Arc<MePool>,
    stats: Arc<Stats>,
    config: Arc<ProxyConfig>,
-    buffer_pool: Arc<BufferPool>,
+    _buffer_pool: Arc<BufferPool>,
    local_addr: SocketAddr,
    rng: Arc<SecureRandom>,
    mut route_rx: watch::Receiver<RouteCutoverState>,
    route_snapshot: RouteCutoverState,
    session_id: u64,
+    session_lease: SessionLease,
 ) -> Result<()>
 where
    R: AsyncRead + Unpin + Send + 'static,
    W: AsyncWrite + Unpin + Send + 'static,
 {
    let user = success.user.clone();
-    let quota_limit = config.access.user_data_quota.get(&user).copied();
    let peer = success.peer;
    let proto_tag = success.proto_tag;
    let pool_generation = me_pool.current_generation();
+    let seed_tier = adaptive_buffers::seed_tier_for_user(&user);

    debug!(
        user = %user,
@@ -417,7 +283,7 @@ where
    );

    let (conn_id, me_rx) = me_pool.registry().register().await;
-    let trace_id = session_id;
+    let trace_id = conn_id;
    let bytes_me2c = Arc::new(AtomicU64::new(0));
    let mut forensics = RelayForensicsState {
        trace_id,
@@ -432,7 +298,8 @@ where
    };

    stats.increment_user_connects(&user);
-    let _me_connection_lease = stats.acquire_me_connection_lease();
+    stats.increment_user_curr_connects(&user);
+    stats.increment_current_connections_me();

    if let Some(cutover) = affected_cutover_state(
        &route_rx,
@@ -450,9 +317,20 @@ where
        tokio::time::sleep(delay).await;
        let _ = me_pool.send_close(conn_id).await;
        me_pool.registry().unregister(conn_id).await;
+        stats.decrement_current_connections_me();
+        stats.decrement_user_curr_connects(&user);
        return Err(ProxyError::Proxy(ROUTE_SWITCH_ERROR_MSG.to_string()));
    }

+    if session_lease.is_stale() {
+        stats.increment_reconnect_stale_close_total();
+        let _ = me_pool.send_close(conn_id).await;
+        me_pool.registry().unregister(conn_id).await;
+        stats.decrement_current_connections_me();
+        stats.decrement_user_curr_connects(&user);
+        return Err(ProxyError::Proxy("Session evicted by reconnect".to_string()));
+    }
+
    // Per-user ad_tag from access.user_ad_tags; fallback to general.ad_tag (hot-reloadable)
    let user_tag: Option<Vec<u8>> = config
        .access
@@ -488,6 +366,7 @@ where
        .general
        .me_c2me_channel_capacity
        .max(C2ME_CHANNEL_CAPACITY_FALLBACK);
+    let c2me_send_timeout = Duration::from_millis(config.general.me_c2me_send_timeout_ms);
    let (c2me_tx, mut c2me_rx) = mpsc::channel::<C2MeCommand>(c2me_channel_capacity);
    let me_pool_c2me = me_pool.clone();
    let effective_tag = effective_tag;
@@ -496,15 +375,42 @@ where
        while let Some(cmd) = c2me_rx.recv().await {
            match cmd {
                C2MeCommand::Data { payload, flags } => {
-                    me_pool_c2me.send_proxy_req(
-                        conn_id,
-                        success.dc_idx,
-                        peer,
-                        translated_local_addr,
-                        payload.as_ref(),
-                        flags,
-                        effective_tag.as_deref(),
-                    ).await?;
+                    if c2me_send_timeout.is_zero() {
+                        me_pool_c2me
+                            .send_proxy_req(
+                                conn_id,
+                                success.dc_idx,
+                                peer,
+                                translated_local_addr,
+                                payload.as_ref(),
+                                flags,
+                                effective_tag.as_deref(),
+                            )
+                            .await?;
+                    } else {
+                        match tokio::time::timeout(
+                            c2me_send_timeout,
+                            me_pool_c2me.send_proxy_req(
+                                conn_id,
+                                success.dc_idx,
+                                peer,
+                                translated_local_addr,
+                                payload.as_ref(),
+                                flags,
+                                effective_tag.as_deref(),
+                            ),
+                        )
+                        .await
+                        {
+                            Ok(send_result) => send_result?,
+                            Err(_) => {
+                                return Err(ProxyError::Proxy(format!(
+                                    "ME send timeout after {}ms",
+                                    c2me_send_timeout.as_millis()
+                                )));
+                            }
+                        }
+                    }
                    sent_since_yield = sent_since_yield.saturating_add(1);
                    if should_yield_c2me_sender(sent_since_yield, !c2me_rx.is_empty()) {
                        sent_since_yield = 0;
@@ -526,7 +432,7 @@ where
    let rng_clone = rng.clone();
    let user_clone = user.clone();
    let bytes_me2c_clone = bytes_me2c.clone();
-    let d2c_flush_policy = MeD2cFlushPolicy::from_config(&config);
+    let d2c_flush_policy = MeD2cFlushPolicy::from_config(&config, seed_tier);
    let me_writer = tokio::spawn(async move {
        let mut writer = crypto_writer;
        let mut frame_buf = Vec::with_capacity(16 * 1024);
@@ -550,7 +456,6 @@ where
                        &mut frame_buf,
                        stats_clone.as_ref(),
                        &user_clone,
-                        quota_limit,
                        bytes_me2c_clone.as_ref(),
                        conn_id,
                        d2c_flush_policy.ack_flush_immediate,
@@ -583,7 +488,6 @@ where
                            &mut frame_buf,
                            stats_clone.as_ref(),
                            &user_clone,
-                            quota_limit,
                            bytes_me2c_clone.as_ref(),
                            conn_id,
                            d2c_flush_policy.ack_flush_immediate,
@@ -616,7 +520,6 @@ where
                                    &mut frame_buf,
                                    stats_clone.as_ref(),
                                    &user_clone,
-                                    quota_limit,
                                    bytes_me2c_clone.as_ref(),
                                    conn_id,
                                    d2c_flush_policy.ack_flush_immediate,
@@ -649,7 +552,6 @@ where
                                        &mut frame_buf,
                                        stats_clone.as_ref(),
                                        &user_clone,
-                                        quota_limit,
                                        bytes_me2c_clone.as_ref(),
                                        conn_id,
                                        d2c_flush_policy.ack_flush_immediate,
@@ -690,6 +592,12 @@ where
    let mut frame_counter: u64 = 0;
    let mut route_watch_open = true;
    loop {
+        if session_lease.is_stale() {
+            stats.increment_reconnect_stale_close_total();
+            let _ = enqueue_c2me_command(&c2me_tx, C2MeCommand::Close, c2me_send_timeout).await;
+            main_result = Err(ProxyError::Proxy("Session evicted by reconnect".to_string()));
+            break;
+        }
        if let Some(cutover) = affected_cutover_state(
            &route_rx,
            RelayRouteMode::Middle,
@@ -704,7 +612,7 @@ where
                "Cutover affected middle session, closing client connection"
            );
            tokio::time::sleep(delay).await;
-            let _ = enqueue_c2me_command(&c2me_tx, C2MeCommand::Close).await;
+            let _ = enqueue_c2me_command(&c2me_tx, C2MeCommand::Close, c2me_send_timeout).await;
            main_result = Err(ProxyError::Proxy(ROUTE_SWITCH_ERROR_MSG.to_string()));
            break;
        }
@@ -719,8 +627,6 @@ where
                &mut crypto_reader,
                proto_tag,
                frame_limit,
-                Duration::from_secs(config.timeouts.client_handshake.max(1)),
-                &buffer_pool,
                &forensics,
                &mut frame_counter,
                &stats,
@@ -731,19 +637,7 @@ where
                        forensics.bytes_c2me = forensics
                            .bytes_c2me
                            .saturating_add(payload.len() as u64);
-                        if let Some(limit) = quota_limit {
-                            let quota_lock = quota_user_lock(&user);
-                            let _quota_guard = quota_lock.lock().await;
-                            stats.add_user_octets_from(&user, payload.len() as u64);
-                            if quota_exceeded_for_user(stats.as_ref(), &user, Some(limit)) {
-                                main_result = Err(ProxyError::DataQuotaExceeded {
-                                    user: user.clone(),
-                                });
-                                break;
-                            }
-                        } else {
-                            stats.add_user_octets_from(&user, payload.len() as u64);
-                        }
+                        stats.add_user_octets_from(&user, payload.len() as u64);
                        let mut flags = proto_flags;
                        if quickack {
                            flags |= RPC_FLAG_QUICKACK;
@@ -752,9 +646,13 @@ where
                            flags |= RPC_FLAG_NOT_ENCRYPTED;
                        }
                        // Keep client read loop lightweight: route heavy ME send path via a dedicated task.
-                        if enqueue_c2me_command(&c2me_tx, C2MeCommand::Data { payload, flags })
-                            .await
-                            .is_err()
+                        if enqueue_c2me_command(
+                            &c2me_tx,
+                            C2MeCommand::Data { payload, flags },
+                            c2me_send_timeout,
+                        )
+                        .await
+                        .is_err()
                        {
                            main_result = Err(ProxyError::Proxy("ME sender channel closed".into()));
                            break;
@@ -763,7 +661,12 @@ where
                    Ok(None) => {
                        debug!(conn_id, "Client EOF");
                        client_closed = true;
-                        let _ = enqueue_c2me_command(&c2me_tx, C2MeCommand::Close).await;
+                        let _ = enqueue_c2me_command(
+                            &c2me_tx,
+                            C2MeCommand::Close,
+                            c2me_send_timeout,
+                        )
+                        .await;
                        break;
                    }
                    Err(e) => {
@@ -812,7 +715,10 @@ where
        frames_ok = frame_counter,
        "ME relay cleanup"
    );
+    adaptive_buffers::record_user_tier(&user, seed_tier);
    me_pool.registry().unregister(conn_id).await;
+    stats.decrement_current_connections_me();
+    stats.decrement_user_curr_connects(&user);
    result
 }

@@ -820,49 +726,30 @@ async fn read_client_payload<R>(
    client_reader: &mut CryptoReader<R>,
    proto_tag: ProtoTag,
    max_frame: usize,
-    frame_read_timeout: Duration,
-    buffer_pool: &Arc<BufferPool>,
    forensics: &RelayForensicsState,
    frame_counter: &mut u64,
    stats: &Stats,
-) -> Result<Option<(PooledBuffer, bool)>>
+) -> Result<Option<(Bytes, bool)>>
 where
    R: AsyncRead + Unpin + Send + 'static,
 {
-    async fn read_exact_with_timeout<R>(
-        client_reader: &mut CryptoReader<R>,
-        buf: &mut [u8],
-        frame_read_timeout: Duration,
-    ) -> Result<()>
-    where
-        R: AsyncRead + Unpin + Send + 'static,
-    {
-        match timeout(frame_read_timeout, client_reader.read_exact(buf)).await {
-            Ok(Ok(_)) => Ok(()),
-            Ok(Err(e)) => Err(ProxyError::Io(e)),
-            Err(_) => Err(ProxyError::Io(std::io::Error::new(
-                std::io::ErrorKind::TimedOut,
-                "middle-relay client frame read timeout",
-            ))),
-        }
-    }
-
    loop {
        let (len, quickack, raw_len_bytes) = match proto_tag {
            ProtoTag::Abridged => {
                let mut first = [0u8; 1];
-                match read_exact_with_timeout(client_reader, &mut first, frame_read_timeout).await {
-                    Ok(()) => {}
-                    Err(ProxyError::Io(e)) if e.kind() == std::io::ErrorKind::UnexpectedEof => {
-                        return Ok(None);
-                    }
-                    Err(e) => return Err(e),
+                match client_reader.read_exact(&mut first).await {
+                    Ok(_) => {}
+                    Err(e) if e.kind() == std::io::ErrorKind::UnexpectedEof => return Ok(None),
+                    Err(e) => return Err(ProxyError::Io(e)),
                }

                let quickack = (first[0] & 0x80) != 0;
                let len_words = if (first[0] & 0x7f) == 0x7f {
                    let mut ext = [0u8; 3];
-                    read_exact_with_timeout(client_reader, &mut ext, frame_read_timeout).await?;
+                    client_reader
+                        .read_exact(&mut ext)
+                        .await
+                        .map_err(ProxyError::Io)?;
                    u32::from_le_bytes([ext[0], ext[1], ext[2], 0]) as usize
                } else {
                    (first[0] & 0x7f) as usize
@@ -875,12 +762,10 @@ where
            }
            ProtoTag::Intermediate | ProtoTag::Secure => {
                let mut len_buf = [0u8; 4];
-                match read_exact_with_timeout(client_reader, &mut len_buf, frame_read_timeout).await {
-                    Ok(()) => {}
-                    Err(ProxyError::Io(e)) if e.kind() == std::io::ErrorKind::UnexpectedEof => {
-                        return Ok(None);
-                    }
-                    Err(e) => return Err(e),
+                match client_reader.read_exact(&mut len_buf).await {
+                    Ok(_) => {}
+                    Err(e) if e.kind() == std::io::ErrorKind::UnexpectedEof => return Ok(None),
+                    Err(e) => return Err(ProxyError::Io(e)),
                }
                let quickack = (len_buf[3] & 0x80) != 0;
                (
@@ -932,21 +817,18 @@ where
            len
        };

-        let mut payload = buffer_pool.get();
-        payload.clear();
-        let current_cap = payload.capacity();
-        if current_cap < len {
-            payload.reserve(len - current_cap);
-        }
-        payload.resize(len, 0);
-        read_exact_with_timeout(client_reader, &mut payload[..len], frame_read_timeout).await?;
+        let mut payload = vec![0u8; len];
+        client_reader
+            .read_exact(&mut payload)
+            .await
+            .map_err(ProxyError::Io)?;

        // Secure Intermediate: strip validated trailing padding bytes.
        if proto_tag == ProtoTag::Secure {
            payload.truncate(secure_payload_len);
        }
        *frame_counter += 1;
-        return Ok(Some((payload, quickack)));
+        return Ok(Some((Bytes::from(payload), quickack)));
    }
 }

@@ -967,7 +849,6 @@ async fn process_me_writer_response<W>(
    frame_buf: &mut Vec<u8>,
    stats: &Stats,
    user: &str,
-    quota_limit: Option<u64>,
    bytes_me2c: &AtomicU64,
    conn_id: u64,
    ack_flush_immediate: bool,
@@ -983,47 +864,17 @@ where
            } else {
                trace!(conn_id, bytes = data.len(), flags, "ME->C data");
            }
-            let data_len = data.len() as u64;
-            if let Some(limit) = quota_limit {
-                let quota_lock = quota_user_lock(user);
-                let _quota_guard = quota_lock.lock().await;
-                if quota_would_be_exceeded_for_user(stats, user, Some(limit), data_len) {
-                    return Err(ProxyError::DataQuotaExceeded {
-                        user: user.to_string(),
-                    });
-                }
-                write_client_payload(
-                    client_writer,
-                    proto_tag,
-                    flags,
-                    &data,
-                    rng,
-                    frame_buf,
-                )
-                .await?;
-
-                bytes_me2c.fetch_add(data.len() as u64, Ordering::Relaxed);
-                stats.add_user_octets_to(user, data.len() as u64);
-
-                if quota_exceeded_for_user(stats, user, Some(limit)) {
-                    return Err(ProxyError::DataQuotaExceeded {
-                        user: user.to_string(),
-                    });
-                }
-            } else {
-                write_client_payload(
-                    client_writer,
-                    proto_tag,
-                    flags,
-                    &data,
-                    rng,
-                    frame_buf,
-                )
-                .await?;
-
-                bytes_me2c.fetch_add(data.len() as u64, Ordering::Relaxed);
-                stats.add_user_octets_to(user, data.len() as u64);
-            }
+            bytes_me2c.fetch_add(data.len() as u64, Ordering::Relaxed);
+            stats.add_user_octets_to(user, data.len() as u64);
+            write_client_payload(
+                client_writer,
+                proto_tag,
+                flags,
+                &data,
+                rng,
+                frame_buf,
+            )
+            .await?;

            Ok(MeWriterResponseOutcome::Continue {
                frames: 1,
@@ -1169,5 +1020,84 @@ where
 }

 #[cfg(test)]
-#[path = "middle_relay_security_tests.rs"]
-mod security_tests;
+mod tests {
+    use super::*;
+    use tokio::time::{Duration as TokioDuration, timeout};
+
+    #[test]
+    fn should_yield_sender_only_on_budget_with_backlog() {
+        assert!(!should_yield_c2me_sender(0, true));
+        assert!(!should_yield_c2me_sender(C2ME_SENDER_FAIRNESS_BUDGET - 1, true));
+        assert!(!should_yield_c2me_sender(C2ME_SENDER_FAIRNESS_BUDGET, false));
+        assert!(should_yield_c2me_sender(C2ME_SENDER_FAIRNESS_BUDGET, true));
+    }
+
+    #[tokio::test]
+    async fn enqueue_c2me_command_uses_try_send_fast_path() {
+        let (tx, mut rx) = mpsc::channel::<C2MeCommand>(2);
+        enqueue_c2me_command(
+            &tx,
+            C2MeCommand::Data {
+                payload: Bytes::from_static(&[1, 2, 3]),
+                flags: 0,
+            },
+            TokioDuration::from_millis(50),
+        )
+        .await
+        .unwrap();
+
+        let recv = timeout(TokioDuration::from_millis(50), rx.recv())
+            .await
+            .unwrap()
+            .unwrap();
+        match recv {
+            C2MeCommand::Data { payload, flags } => {
+                assert_eq!(payload.as_ref(), &[1, 2, 3]);
+                assert_eq!(flags, 0);
+            }
+            C2MeCommand::Close => panic!("unexpected close command"),
+        }
+    }
+
+    #[tokio::test]
+    async fn enqueue_c2me_command_falls_back_to_send_when_queue_is_full() {
+        let (tx, mut rx) = mpsc::channel::<C2MeCommand>(1);
+        tx.send(C2MeCommand::Data {
+            payload: Bytes::from_static(&[9]),
+            flags: 9,
+        })
+        .await
+        .unwrap();
+
+        let tx2 = tx.clone();
+        let producer = tokio::spawn(async move {
+            enqueue_c2me_command(
+                &tx2,
+                C2MeCommand::Data {
+                    payload: Bytes::from_static(&[7, 7]),
+                    flags: 7,
+                },
+                TokioDuration::from_millis(100),
+            )
+            .await
+            .unwrap();
+        });
+
+        let _ = timeout(TokioDuration::from_millis(100), rx.recv())
+            .await
+            .unwrap();
+        producer.await.unwrap();
+
+        let recv = timeout(TokioDuration::from_millis(100), rx.recv())
+            .await
+            .unwrap()
+            .unwrap();
+        match recv {
+            C2MeCommand::Data { payload, flags } => {
+                assert_eq!(payload.as_ref(), &[7, 7]);
+                assert_eq!(flags, 7);
+            }
+            C2MeCommand::Close => panic!("unexpected close command"),
+        }
+    }
+}
@@ -1,5 +1,6 @@
 //! Proxy Defs

+pub mod adaptive_buffers;
 pub mod client;
 pub mod direct_relay;
 pub mod handshake;
@@ -7,6 +8,7 @@ pub mod masking;
 pub mod middle_relay;
 pub mod route_mode;
 pub mod relay;
+pub mod session_eviction;

 pub use client::ClientHandler;
 #[allow(unused_imports)]
@@ -53,17 +53,20 @@

 use std::io;
 use std::pin::Pin;
-use std::sync::{Arc, Mutex, OnceLock};
-use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
+use std::sync::Arc;
+use std::sync::atomic::{AtomicU64, Ordering};
 use std::task::{Context, Poll};
 use std::time::Duration;
-use dashmap::DashMap;
 use tokio::io::{
    AsyncRead, AsyncWrite, AsyncWriteExt, ReadBuf, copy_bidirectional_with_sizes,
 };
 use tokio::time::Instant;
 use tracing::{debug, trace, warn};
-use crate::error::{ProxyError, Result};
+use crate::error::Result;
+use crate::proxy::adaptive_buffers::{
+    self, AdaptiveTier, RelaySignalSample, SessionAdaptiveController, TierTransitionReason,
+};
+use crate::proxy::session_eviction::SessionLease;
 use crate::stats::Stats;
 use crate::stream::BufferPool;

@@ -80,6 +83,7 @@ const ACTIVITY_TIMEOUT: Duration = Duration::from_secs(1800);
 /// 10 seconds gives responsive timeout detection (±10s accuracy)
 /// without measurable overhead from atomic reads.
 const WATCHDOG_INTERVAL: Duration = Duration::from_secs(10);
+const ADAPTIVE_TICK: Duration = Duration::from_millis(250);

 // ============= CombinedStream =============

@@ -156,6 +160,16 @@ struct SharedCounters {
    s2c_ops: AtomicU64,
    /// Milliseconds since relay epoch of last I/O activity
    last_activity_ms: AtomicU64,
+    /// Bytes requested to write to client (S→C direction).
+    s2c_requested_bytes: AtomicU64,
+    /// Total write operations for S→C direction.
+    s2c_write_ops: AtomicU64,
+    /// Number of partial writes to client.
+    s2c_partial_writes: AtomicU64,
+    /// Number of times S→C poll_write returned Pending.
+    s2c_pending_writes: AtomicU64,
+    /// Consecutive pending writes in S→C direction.
+    s2c_consecutive_pending_writes: AtomicU64,
 }

 impl SharedCounters {
@@ -166,6 +180,11 @@ impl SharedCounters {
            c2s_ops: AtomicU64::new(0),
            s2c_ops: AtomicU64::new(0),
            last_activity_ms: AtomicU64::new(0),
+            s2c_requested_bytes: AtomicU64::new(0),
+            s2c_write_ops: AtomicU64::new(0),
+            s2c_partial_writes: AtomicU64::new(0),
+            s2c_pending_writes: AtomicU64::new(0),
+            s2c_consecutive_pending_writes: AtomicU64::new(0),
        }
    }

@@ -206,10 +225,6 @@ struct StatsIo<S> {
    counters: Arc<SharedCounters>,
    stats: Arc<Stats>,
    user: String,
-    quota_limit: Option<u64>,
-    quota_exceeded: Arc<AtomicBool>,
-    quota_read_wake_scheduled: bool,
-    quota_write_wake_scheduled: bool,
    epoch: Instant,
 }

@@ -219,64 +234,11 @@ impl<S> StatsIo<S> {
        counters: Arc<SharedCounters>,
        stats: Arc<Stats>,
        user: String,
-        quota_limit: Option<u64>,
-        quota_exceeded: Arc<AtomicBool>,
        epoch: Instant,
    ) -> Self {
        // Mark initial activity so the watchdog doesn't fire before data flows
        counters.touch(Instant::now(), epoch);
-        Self {
-            inner,
-            counters,
-            stats,
-            user,
-            quota_limit,
-            quota_exceeded,
-            quota_read_wake_scheduled: false,
-            quota_write_wake_scheduled: false,
-            epoch,
-        }
-    }
-}
-
-#[derive(Debug)]
-struct QuotaIoSentinel;
-
-impl std::fmt::Display for QuotaIoSentinel {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_str("user data quota exceeded")
-    }
-}
-
-impl std::error::Error for QuotaIoSentinel {}
-
-fn quota_io_error() -> io::Error {
-    io::Error::new(io::ErrorKind::PermissionDenied, QuotaIoSentinel)
-}
-
-fn is_quota_io_error(err: &io::Error) -> bool {
-    err.kind() == io::ErrorKind::PermissionDenied
-        && err
-            .get_ref()
-            .and_then(|source| source.downcast_ref::<QuotaIoSentinel>())
-            .is_some()
-}
-
-static QUOTA_USER_LOCKS: OnceLock<DashMap<String, Arc<Mutex<()>>>> = OnceLock::new();
-
-fn quota_user_lock(user: &str) -> Arc<Mutex<()>> {
-    let locks = QUOTA_USER_LOCKS.get_or_init(DashMap::new);
-    if let Some(existing) = locks.get(user) {
-        return Arc::clone(existing.value());
-    }
-
-    let created = Arc::new(Mutex::new(()));
-    match locks.entry(user.to_string()) {
-        dashmap::mapref::entry::Entry::Occupied(entry) => Arc::clone(entry.get()),
-        dashmap::mapref::entry::Entry::Vacant(entry) => {
-            entry.insert(Arc::clone(&created));
-            created
-        }
+        Self { inner, counters, stats, user, epoch }
    }
 }

@@ -287,42 +249,6 @@ impl<S: AsyncRead + Unpin> AsyncRead for StatsIo<S> {
        buf: &mut ReadBuf<'_>,
    ) -> Poll<io::Result<()>> {
        let this = self.get_mut();
-        if this.quota_exceeded.load(Ordering::Relaxed) {
-            return Poll::Ready(Err(quota_io_error()));
-        }
-
-        let quota_lock = this
-            .quota_limit
-            .is_some()
-            .then(|| quota_user_lock(&this.user));
-        let _quota_guard = if let Some(lock) = quota_lock.as_ref() {
-            match lock.try_lock() {
-                Ok(guard) => {
-                    this.quota_read_wake_scheduled = false;
-                    Some(guard)
-                }
-                Err(_) => {
-                    if !this.quota_read_wake_scheduled {
-                        this.quota_read_wake_scheduled = true;
-                        let waker = cx.waker().clone();
-                        tokio::task::spawn(async move {
-                            tokio::task::yield_now().await;
-                            waker.wake();
-                        });
-                    }
-                    return Poll::Pending;
-                }
-            }
-        } else {
-            None
-        };
-
-        if let Some(limit) = this.quota_limit
-            && this.stats.get_user_total_octets(&this.user) >= limit
-        {
-            this.quota_exceeded.store(true, Ordering::Relaxed);
-            return Poll::Ready(Err(quota_io_error()));
-        }
        let before = buf.filled().len();

        match Pin::new(&mut this.inner).poll_read(cx, buf) {
@@ -337,13 +263,6 @@ impl<S: AsyncRead + Unpin> AsyncRead for StatsIo<S> {
                    this.stats.add_user_octets_from(&this.user, n as u64);
                    this.stats.increment_user_msgs_from(&this.user);

-                    if let Some(limit) = this.quota_limit
-                        && this.stats.get_user_total_octets(&this.user) >= limit
-                    {
-                        this.quota_exceeded.store(true, Ordering::Relaxed);
-                        return Poll::Ready(Err(quota_io_error()));
-                    }
-
                    trace!(user = %this.user, bytes = n, "C->S");
                }
                Poll::Ready(Ok(()))
@@ -360,57 +279,21 @@ impl<S: AsyncWrite + Unpin> AsyncWrite for StatsIo<S> {
        buf: &[u8],
    ) -> Poll<io::Result<usize>> {
        let this = self.get_mut();
-        if this.quota_exceeded.load(Ordering::Relaxed) {
-            return Poll::Ready(Err(quota_io_error()));
-        }
+        this.counters
+            .s2c_requested_bytes
+            .fetch_add(buf.len() as u64, Ordering::Relaxed);

-        let quota_lock = this
-            .quota_limit
-            .is_some()
-            .then(|| quota_user_lock(&this.user));
-        let _quota_guard = if let Some(lock) = quota_lock.as_ref() {
-            match lock.try_lock() {
-                Ok(guard) => {
-                    this.quota_write_wake_scheduled = false;
-                    Some(guard)
-                }
-                Err(_) => {
-                    if !this.quota_write_wake_scheduled {
-                        this.quota_write_wake_scheduled = true;
-                        let waker = cx.waker().clone();
-                        tokio::task::spawn(async move {
-                            tokio::task::yield_now().await;
-                            waker.wake();
-                        });
-                    }
-                    return Poll::Pending;
-                }
-            }
-        } else {
-            None
-        };
-
-        let write_buf = if let Some(limit) = this.quota_limit {
-            let used = this.stats.get_user_total_octets(&this.user);
-            if used >= limit {
-                this.quota_exceeded.store(true, Ordering::Relaxed);
-                return Poll::Ready(Err(quota_io_error()));
-            }
-
-            let remaining = (limit - used) as usize;
-            if buf.len() > remaining {
-                // Fail closed: do not emit partial S->C payload when remaining
-                // quota cannot accommodate the pending write request.
-                this.quota_exceeded.store(true, Ordering::Relaxed);
-                return Poll::Ready(Err(quota_io_error()));
-            }
-            buf
-        } else {
-            buf
-        };
-
-        match Pin::new(&mut this.inner).poll_write(cx, write_buf) {
+        match Pin::new(&mut this.inner).poll_write(cx, buf) {
            Poll::Ready(Ok(n)) => {
+                this.counters.s2c_write_ops.fetch_add(1, Ordering::Relaxed);
+                this.counters
+                    .s2c_consecutive_pending_writes
+                    .store(0, Ordering::Relaxed);
+                if n < buf.len() {
+                    this.counters
+                        .s2c_partial_writes
+                        .fetch_add(1, Ordering::Relaxed);
+                }
                if n > 0 {
                    // S→C: data written to client
                    this.counters.s2c_bytes.fetch_add(n as u64, Ordering::Relaxed);
@@ -420,17 +303,19 @@ impl<S: AsyncWrite + Unpin> AsyncWrite for StatsIo<S> {
                    this.stats.add_user_octets_to(&this.user, n as u64);
                    this.stats.increment_user_msgs_to(&this.user);

-                    if let Some(limit) = this.quota_limit
-                        && this.stats.get_user_total_octets(&this.user) >= limit
-                    {
-                        this.quota_exceeded.store(true, Ordering::Relaxed);
-                        return Poll::Ready(Err(quota_io_error()));
-                    }
-
                    trace!(user = %this.user, bytes = n, "S->C");
                }
                Poll::Ready(Ok(n))
            }
+            Poll::Pending => {
+                this.counters
+                    .s2c_pending_writes
+                    .fetch_add(1, Ordering::Relaxed);
+                this.counters
+                    .s2c_consecutive_pending_writes
+                    .fetch_add(1, Ordering::Relaxed);
+                Poll::Pending
+            }
            other => other,
        }
    }
@@ -463,8 +348,7 @@ impl<S: AsyncWrite + Unpin> AsyncWrite for StatsIo<S> {
 /// - Per-user stats: bytes and ops counted per direction
 /// - Periodic rate logging: every 10 seconds when active
 /// - Clean shutdown: both write sides are shut down on exit
-/// - Error propagation: quota exits return `ProxyError::DataQuotaExceeded`,
-///   other I/O failures are returned as `ProxyError::Io`
+/// - Error propagation: I/O errors are returned as `ProxyError::Io`
 pub async fn relay_bidirectional<CR, CW, SR, SW>(
    client_reader: CR,
    client_writer: CW,
@@ -473,9 +357,11 @@ pub async fn relay_bidirectional<CR, CW, SR, SW>(
    c2s_buf_size: usize,
    s2c_buf_size: usize,
    user: &str,
+    dc_idx: i16,
    stats: Arc<Stats>,
-    quota_limit: Option<u64>,
    _buffer_pool: Arc<BufferPool>,
+    session_lease: SessionLease,
+    seed_tier: AdaptiveTier,
 ) -> Result<()>
 where
    CR: AsyncRead + Unpin + Send + 'static,
@@ -485,7 +371,6 @@ where
 {
    let epoch = Instant::now();
    let counters = Arc::new(SharedCounters::new());
-    let quota_exceeded = Arc::new(AtomicBool::new(false));
    let user_owned = user.to_string();

    // ── Combine split halves into bidirectional streams ──────────────
@@ -498,31 +383,43 @@ where
        Arc::clone(&counters),
        Arc::clone(&stats),
        user_owned.clone(),
-        quota_limit,
-        Arc::clone(&quota_exceeded),
        epoch,
    );

    // ── Watchdog: activity timeout + periodic rate logging ──────────
    let wd_counters = Arc::clone(&counters);
    let wd_user = user_owned.clone();
-    let wd_quota_exceeded = Arc::clone(&quota_exceeded);
+    let wd_dc = dc_idx;
+    let wd_stats = Arc::clone(&stats);
+    let wd_session = session_lease.clone();

    let watchdog = async {
-        let mut prev_c2s: u64 = 0;
-        let mut prev_s2c: u64 = 0;
+        let mut prev_c2s_log: u64 = 0;
+        let mut prev_s2c_log: u64 = 0;
+        let mut prev_c2s_sample: u64 = 0;
+        let mut prev_s2c_requested_sample: u64 = 0;
+        let mut prev_s2c_written_sample: u64 = 0;
+        let mut prev_s2c_write_ops_sample: u64 = 0;
+        let mut prev_s2c_partial_sample: u64 = 0;
+        let mut accumulated_log = Duration::ZERO;
+        let mut adaptive = SessionAdaptiveController::new(seed_tier);

        loop {
-            tokio::time::sleep(WATCHDOG_INTERVAL).await;
+            tokio::time::sleep(ADAPTIVE_TICK).await;
+
+            if wd_session.is_stale() {
+                wd_stats.increment_reconnect_stale_close_total();
+                warn!(
+                    user = %wd_user,
+                    dc = wd_dc,
+                    "Session evicted by reconnect"
+                );
+                return;
+            }

            let now = Instant::now();
            let idle = wd_counters.idle_duration(now, epoch);

-            if wd_quota_exceeded.load(Ordering::Relaxed) {
-                warn!(user = %wd_user, "User data quota reached, closing relay");
-                return;
-            }
-
            // ── Activity timeout ────────────────────────────────────
            if idle >= ACTIVITY_TIMEOUT {
                let c2s = wd_counters.c2s_bytes.load(Ordering::Relaxed);
@@ -537,11 +434,80 @@ where
                return; // Causes select! to cancel copy_bidirectional
            }

+            let c2s_total = wd_counters.c2s_bytes.load(Ordering::Relaxed);
+            let s2c_requested_total = wd_counters
+                .s2c_requested_bytes
+                .load(Ordering::Relaxed);
+            let s2c_written_total = wd_counters.s2c_bytes.load(Ordering::Relaxed);
+            let s2c_write_ops_total = wd_counters
+                .s2c_write_ops
+                .load(Ordering::Relaxed);
+            let s2c_partial_total = wd_counters
+                .s2c_partial_writes
+                .load(Ordering::Relaxed);
+            let consecutive_pending = wd_counters
+                .s2c_consecutive_pending_writes
+                .load(Ordering::Relaxed) as u32;
+
+            let sample = RelaySignalSample {
+                c2s_bytes: c2s_total.saturating_sub(prev_c2s_sample),
+                s2c_requested_bytes: s2c_requested_total
+                    .saturating_sub(prev_s2c_requested_sample),
+                s2c_written_bytes: s2c_written_total
+                    .saturating_sub(prev_s2c_written_sample),
+                s2c_write_ops: s2c_write_ops_total
+                    .saturating_sub(prev_s2c_write_ops_sample),
+                s2c_partial_writes: s2c_partial_total
+                    .saturating_sub(prev_s2c_partial_sample),
+                s2c_consecutive_pending_writes: consecutive_pending,
+            };
+
+            if let Some(transition) = adaptive.observe(sample, ADAPTIVE_TICK.as_secs_f64()) {
+                match transition.reason {
+                    TierTransitionReason::SoftConfirmed => {
+                        wd_stats.increment_relay_adaptive_promotions_total();
+                    }
+                    TierTransitionReason::HardPressure => {
+                        wd_stats.increment_relay_adaptive_promotions_total();
+                        wd_stats.increment_relay_adaptive_hard_promotions_total();
+                    }
+                    TierTransitionReason::QuietDemotion => {
+                        wd_stats.increment_relay_adaptive_demotions_total();
+                    }
+                }
+                adaptive_buffers::record_user_tier(&wd_user, adaptive.max_tier_seen());
+                debug!(
+                    user = %wd_user,
+                    dc = wd_dc,
+                    from_tier = transition.from.as_u8(),
+                    to_tier = transition.to.as_u8(),
+                    reason = ?transition.reason,
+                    throughput_ema_bps = sample
+                        .c2s_bytes
+                        .max(sample.s2c_written_bytes)
+                        .saturating_mul(8)
+                        .saturating_mul(4),
+                    "Adaptive relay tier transition"
+                );
+            }
+
+            prev_c2s_sample = c2s_total;
+            prev_s2c_requested_sample = s2c_requested_total;
+            prev_s2c_written_sample = s2c_written_total;
+            prev_s2c_write_ops_sample = s2c_write_ops_total;
+            prev_s2c_partial_sample = s2c_partial_total;
+
+            accumulated_log = accumulated_log.saturating_add(ADAPTIVE_TICK);
+            if accumulated_log < WATCHDOG_INTERVAL {
+                continue;
+            }
+            accumulated_log = Duration::ZERO;
+
            // ── Periodic rate logging ───────────────────────────────
            let c2s = wd_counters.c2s_bytes.load(Ordering::Relaxed);
            let s2c = wd_counters.s2c_bytes.load(Ordering::Relaxed);
-            let c2s_delta = c2s - prev_c2s;
-            let s2c_delta = s2c - prev_s2c;
+            let c2s_delta = c2s.saturating_sub(prev_c2s_log);
+            let s2c_delta = s2c.saturating_sub(prev_s2c_log);

            if c2s_delta > 0 || s2c_delta > 0 {
                let secs = WATCHDOG_INTERVAL.as_secs_f64();
@@ -555,8 +521,8 @@ where
                );
            }

-            prev_c2s = c2s;
-            prev_s2c = s2c;
+            prev_c2s_log = c2s;
+            prev_s2c_log = s2c;
        }
    };

@@ -591,6 +557,7 @@ where
    let c2s_ops = counters.c2s_ops.load(Ordering::Relaxed);
    let s2c_ops = counters.s2c_ops.load(Ordering::Relaxed);
    let duration = epoch.elapsed();
+    adaptive_buffers::record_user_tier(&user_owned, seed_tier);

    match copy_result {
        Some(Ok((c2s, s2c))) => {
@@ -606,22 +573,6 @@ where
            );
            Ok(())
        }
-        Some(Err(e)) if is_quota_io_error(&e) => {
-            let c2s = counters.c2s_bytes.load(Ordering::Relaxed);
-            let s2c = counters.s2c_bytes.load(Ordering::Relaxed);
-            warn!(
-                user = %user_owned,
-                c2s_bytes = c2s,
-                s2c_bytes = s2c,
-                c2s_msgs = c2s_ops,
-                s2c_msgs = s2c_ops,
-                duration_secs = duration.as_secs(),
-                "Data quota reached, closing relay"
-            );
-            Err(ProxyError::DataQuotaExceeded {
-                user: user_owned.clone(),
-            })
-        }
        Some(Err(e)) => {
            // I/O error in one of the directions
            let c2s = counters.c2s_bytes.load(Ordering::Relaxed);
@@ -655,7 +606,3 @@ where
        }
    }
 }
-
-#[cfg(test)]
-#[path = "relay_security_tests.rs"]
-mod security_tests;
@@ -1,10 +1,10 @@
 use std::sync::Arc;
-use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::atomic::{AtomicU8, AtomicU64, Ordering};
 use std::time::{Duration, SystemTime, UNIX_EPOCH};

 use tokio::sync::watch;

-pub(crate) const ROUTE_SWITCH_ERROR_MSG: &str = "Session terminated";
+pub(crate) const ROUTE_SWITCH_ERROR_MSG: &str = "Route mode switched by cutover";

 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 #[repr(u8)]
@@ -14,6 +14,17 @@ pub(crate) enum RelayRouteMode {
 }

 impl RelayRouteMode {
+    pub(crate) fn as_u8(self) -> u8 {
+        self as u8
+    }
+
+    pub(crate) fn from_u8(value: u8) -> Self {
+        match value {
+            1 => Self::Middle,
+            _ => Self::Direct,
+        }
+    }
+
    pub(crate) fn as_str(self) -> &'static str {
        match self {
            Self::Direct => "direct",
@@ -30,6 +41,8 @@ pub(crate) struct RouteCutoverState {

 #[derive(Clone)]
 pub(crate) struct RouteRuntimeController {
+    mode: Arc<AtomicU8>,
+    generation: Arc<AtomicU64>,
    direct_since_epoch_secs: Arc<AtomicU64>,
    tx: watch::Sender<RouteCutoverState>,
 }
@@ -47,13 +60,18 @@ impl RouteRuntimeController {
            0
        };
        Self {
+            mode: Arc::new(AtomicU8::new(initial_mode.as_u8())),
+            generation: Arc::new(AtomicU64::new(0)),
            direct_since_epoch_secs: Arc::new(AtomicU64::new(direct_since_epoch_secs)),
            tx,
        }
    }

    pub(crate) fn snapshot(&self) -> RouteCutoverState {
-        *self.tx.borrow()
+        RouteCutoverState {
+            mode: RelayRouteMode::from_u8(self.mode.load(Ordering::Relaxed)),
+            generation: self.generation.load(Ordering::Relaxed),
+        }
    }

    pub(crate) fn subscribe(&self) -> watch::Receiver<RouteCutoverState> {
@@ -66,29 +84,20 @@ impl RouteRuntimeController {
    }

    pub(crate) fn set_mode(&self, mode: RelayRouteMode) -> Option<RouteCutoverState> {
-        let mut next = None;
-        let changed = self.tx.send_if_modified(|state| {
-            if state.mode == mode {
-                return false;
-            }
-            state.mode = mode;
-            state.generation = state.generation.saturating_add(1);
-            next = Some(*state);
-            true
-        });
-
-        if !changed {
+        let previous = self.mode.swap(mode.as_u8(), Ordering::Relaxed);
+        if previous == mode.as_u8() {
            return None;
        }
-
        if matches!(mode, RelayRouteMode::Direct) {
            self.direct_since_epoch_secs
                .store(now_epoch_secs(), Ordering::Relaxed);
        } else {
            self.direct_since_epoch_secs.store(0, Ordering::Relaxed);
        }
-
-        next
+        let generation = self.generation.fetch_add(1, Ordering::Relaxed) + 1;
+        let next = RouteCutoverState { mode, generation };
+        self.tx.send_replace(next);
+        Some(next)
    }
 }

@@ -101,10 +110,10 @@ fn now_epoch_secs() -> u64 {

 pub(crate) fn is_session_affected_by_cutover(
    current: RouteCutoverState,
-    session_mode: RelayRouteMode,
+    _session_mode: RelayRouteMode,
    session_generation: u64,
 ) -> bool {
-    current.generation > session_generation && current.mode != session_mode
+    current.generation > session_generation
 }

 pub(crate) fn affected_cutover_state(
@@ -131,7 +140,3 @@ pub(crate) fn cutover_stagger_delay(session_id: u64, generation: u64) -> Duratio
    let ms = 1000 + (value % 1000);
    Duration::from_millis(ms)
 }
-
-#[cfg(test)]
-#[path = "route_mode_security_tests.rs"]
-mod security_tests;
@@ -1,406 +0,0 @@
-use super::*;
-use rand::{Rng, SeedableRng};
-use rand::rngs::StdRng;
-use std::sync::Arc;
-use std::sync::atomic::{AtomicU64, Ordering};
-
-#[test]
-fn cutover_stagger_delay_is_deterministic_for_same_inputs() {
-    let d1 = cutover_stagger_delay(0x0123_4567_89ab_cdef, 42);
-    let d2 = cutover_stagger_delay(0x0123_4567_89ab_cdef, 42);
-    assert_eq!(
-        d1, d2,
-        "stagger delay must be deterministic for identical session/generation inputs"
-    );
-}
-
-#[test]
-fn cutover_stagger_delay_stays_within_budget_bounds() {
-    // Black-hat model: censors trigger many cutovers and correlate disconnect timing.
-    // Keep delay inside a narrow coarse window to avoid long-tail spikes.
-    for generation in [0u64, 1, 2, 3, 16, 128, u32::MAX as u64, u64::MAX] {
-        for session_id in [
-            0u64,
-            1,
-            2,
-            0xdead_beef,
-            0xfeed_face_cafe_babe,
-            u64::MAX,
-        ] {
-            let delay = cutover_stagger_delay(session_id, generation);
-            assert!(
-                (1000..=1999).contains(&delay.as_millis()),
-                "stagger delay must remain in fixed 1000..=1999ms budget"
-            );
-        }
-    }
-}
-
-#[test]
-fn cutover_stagger_delay_changes_with_generation_for_same_session() {
-    let session_id = 0x0123_4567_89ab_cdef;
-    let first = cutover_stagger_delay(session_id, 100);
-    let second = cutover_stagger_delay(session_id, 101);
-    assert_ne!(
-        first, second,
-        "adjacent cutover generations should decorrelate disconnect delays"
-    );
-}
-
-#[test]
-fn route_runtime_set_mode_is_idempotent_for_same_mode() {
-    let runtime = RouteRuntimeController::new(RelayRouteMode::Direct);
-    let first = runtime.snapshot();
-    let changed = runtime.set_mode(RelayRouteMode::Direct);
-    let second = runtime.snapshot();
-
-    assert!(
-        changed.is_none(),
-        "setting already-active mode must not produce a cutover event"
-    );
-    assert_eq!(
-        first.generation, second.generation,
-        "idempotent mode set must not bump generation"
-    );
-}
-
-#[test]
-fn affected_cutover_state_triggers_only_for_newer_generation() {
-    let runtime = RouteRuntimeController::new(RelayRouteMode::Direct);
-    let rx = runtime.subscribe();
-    let initial = runtime.snapshot();
-
-    assert!(
-        affected_cutover_state(&rx, RelayRouteMode::Direct, initial.generation).is_none(),
-        "current generation must not be considered a cutover for existing session"
-    );
-
-    let next = runtime
-        .set_mode(RelayRouteMode::Middle)
-        .expect("mode change must produce cutover state");
-    let seen = affected_cutover_state(&rx, RelayRouteMode::Direct, initial.generation)
-        .expect("newer generation must be observed as cutover");
-
-    assert_eq!(seen.generation, next.generation);
-    assert_eq!(seen.mode, RelayRouteMode::Middle);
-}
-
-#[test]
-fn integration_watch_and_snapshot_follow_same_transition_sequence() {
-    let runtime = RouteRuntimeController::new(RelayRouteMode::Direct);
-    let rx = runtime.subscribe();
-
-    let sequence = [
-        RelayRouteMode::Middle,
-        RelayRouteMode::Middle,
-        RelayRouteMode::Direct,
-        RelayRouteMode::Direct,
-        RelayRouteMode::Middle,
-    ];
-
-    let mut expected_generation = 0u64;
-    let mut expected_mode = RelayRouteMode::Direct;
-
-    for target in sequence {
-        let changed = runtime.set_mode(target);
-        if target == expected_mode {
-            assert!(changed.is_none(), "idempotent transition must return none");
-        } else {
-            expected_mode = target;
-            expected_generation = expected_generation.saturating_add(1);
-            let emitted = changed.expect("real transition must emit cutover state");
-            assert_eq!(emitted.mode, expected_mode);
-            assert_eq!(emitted.generation, expected_generation);
-        }
-
-        let snap = runtime.snapshot();
-        let watched = *rx.borrow();
-        assert_eq!(snap, watched, "snapshot and watch state must stay aligned");
-        assert_eq!(snap.mode, expected_mode);
-        assert_eq!(snap.generation, expected_generation);
-    }
-}
-
-#[test]
-fn session_is_not_affected_when_mode_matches_even_if_generation_advanced() {
-    let session_mode = RelayRouteMode::Direct;
-    let current = RouteCutoverState {
-        mode: RelayRouteMode::Direct,
-        generation: 2,
-    };
-    let session_generation = 0;
-
-    assert!(
-        !is_session_affected_by_cutover(current, session_mode, session_generation),
-        "session on matching final route mode should not be force-cut over on intermediate generation bumps"
-    );
-}
-
-#[test]
-fn cutover_predicate_rejects_equal_generation_even_if_mode_differs() {
-    let current = RouteCutoverState {
-        mode: RelayRouteMode::Middle,
-        generation: 77,
-    };
-    assert!(
-        !is_session_affected_by_cutover(current, RelayRouteMode::Direct, 77),
-        "equal generation must never trigger cutover regardless of mode mismatch"
-    );
-}
-
-#[test]
-fn adversarial_route_oscillation_only_cuts_over_sessions_with_different_final_mode() {
-    let runtime = RouteRuntimeController::new(RelayRouteMode::Direct);
-    let rx = runtime.subscribe();
-    let session_generation = runtime.snapshot().generation;
-
-    runtime
-        .set_mode(RelayRouteMode::Middle)
-        .expect("direct->middle must transition");
-    runtime
-        .set_mode(RelayRouteMode::Direct)
-        .expect("middle->direct must transition");
-
-    assert!(
-        affected_cutover_state(&rx, RelayRouteMode::Direct, session_generation).is_none(),
-        "direct session should survive when final mode returns to direct"
-    );
-    assert!(
-        affected_cutover_state(&rx, RelayRouteMode::Middle, session_generation).is_some(),
-        "middle session should be cut over when final mode is direct"
-    );
-}
-
-#[test]
-fn light_fuzz_cutover_predicate_matches_reference_oracle() {
-    let mut rng = StdRng::seed_from_u64(0xC0DEC0DE5EED);
-    for _ in 0..20_000 {
-        let current = RouteCutoverState {
-            mode: if rng.random::<bool>() {
-                RelayRouteMode::Direct
-            } else {
-                RelayRouteMode::Middle
-            },
-            generation: rng.random_range(0u64..1_000_000),
-        };
-        let session_mode = if rng.random::<bool>() {
-            RelayRouteMode::Direct
-        } else {
-            RelayRouteMode::Middle
-        };
-        let session_generation = rng.random_range(0u64..1_000_000);
-
-        let expected = current.generation > session_generation && current.mode != session_mode;
-        let actual = is_session_affected_by_cutover(current, session_mode, session_generation);
-        assert_eq!(
-            actual, expected,
-            "cutover predicate must match mode-aware generation oracle"
-        );
-    }
-}
-
-#[test]
-fn light_fuzz_set_mode_generation_tracks_only_real_transitions() {
-    let runtime = RouteRuntimeController::new(RelayRouteMode::Direct);
-    let mut rng = StdRng::seed_from_u64(0x0DDC0FFE);
-
-    let mut expected_mode = RelayRouteMode::Direct;
-    let mut expected_generation = 0u64;
-
-    for _ in 0..10_000 {
-        let candidate = if rng.random::<bool>() {
-            RelayRouteMode::Direct
-        } else {
-            RelayRouteMode::Middle
-        };
-        let changed = runtime.set_mode(candidate);
-
-        if candidate == expected_mode {
-            assert!(changed.is_none(), "idempotent set_mode must not emit cutover state");
-        } else {
-            expected_mode = candidate;
-            expected_generation = expected_generation.saturating_add(1);
-            let next = changed.expect("mode transition must emit cutover state");
-            assert_eq!(next.mode, expected_mode);
-            assert_eq!(next.generation, expected_generation);
-        }
-    }
-
-    let final_state = runtime.snapshot();
-    assert_eq!(final_state.mode, expected_mode);
-    assert_eq!(final_state.generation, expected_generation);
-}
-
-#[test]
-fn stress_snapshot_and_watch_state_remain_consistent_under_concurrent_switch_storm() {
-    let runtime = Arc::new(RouteRuntimeController::new(RelayRouteMode::Direct));
-
-    std::thread::scope(|scope| {
-        let mut writers = Vec::new();
-        for worker in 0..4usize {
-            let runtime = Arc::clone(&runtime);
-            writers.push(scope.spawn(move || {
-                for step in 0..20_000usize {
-                    let mode = if (worker + step) % 2 == 0 {
-                        RelayRouteMode::Direct
-                    } else {
-                        RelayRouteMode::Middle
-                    };
-                    let _ = runtime.set_mode(mode);
-                }
-            }));
-        }
-
-        for writer in writers {
-            writer
-                .join()
-                .expect("route mode writer thread must not panic");
-        }
-
-        let rx = runtime.subscribe();
-        for _ in 0..128 {
-            assert_eq!(
-                runtime.snapshot(),
-                *rx.borrow(),
-                "snapshot and watch state must converge after concurrent set_mode churn"
-            );
-            std::thread::yield_now();
-        }
-    });
-}
-
-#[test]
-fn stress_concurrent_transition_count_matches_final_generation() {
-    let runtime = Arc::new(RouteRuntimeController::new(RelayRouteMode::Direct));
-    let successful_transitions = Arc::new(AtomicU64::new(0));
-
-    std::thread::scope(|scope| {
-        let mut workers = Vec::new();
-        for worker in 0..6usize {
-            let runtime = Arc::clone(&runtime);
-            let successful_transitions = Arc::clone(&successful_transitions);
-            workers.push(scope.spawn(move || {
-                let mut state = (worker as u64 + 1).wrapping_mul(0x9E37_79B9_7F4A_7C15);
-                for _ in 0..25_000usize {
-                    state ^= state << 7;
-                    state ^= state >> 9;
-                    state ^= state << 8;
-                    let mode = if (state & 1) == 0 {
-                        RelayRouteMode::Direct
-                    } else {
-                        RelayRouteMode::Middle
-                    };
-                    if runtime.set_mode(mode).is_some() {
-                        successful_transitions.fetch_add(1, Ordering::Relaxed);
-                    }
-                }
-            }));
-        }
-
-        for worker in workers {
-            worker.join().expect("route mode transition worker must not panic");
-        }
-    });
-
-    let final_state = runtime.snapshot();
-    assert_eq!(
-        final_state.generation,
-        successful_transitions.load(Ordering::Relaxed),
-        "final generation must equal number of accepted mode transitions"
-    );
-    assert_eq!(
-        final_state,
-        *runtime.subscribe().borrow(),
-        "watch and snapshot state must match after concurrent transition accounting"
-    );
-}
-
-#[test]
-fn light_fuzz_cutover_stagger_delay_distribution_stays_in_fixed_window() {
-    // Deterministic xorshift fuzzing keeps this test stable across runs.
-    let mut s: u64 = 0x9E37_79B9_7F4A_7C15;
-
-    for _ in 0..20_000 {
-        s ^= s << 7;
-        s ^= s >> 9;
-        s ^= s << 8;
-        let session_id = s;
-
-        s ^= s << 7;
-        s ^= s >> 9;
-        s ^= s << 8;
-        let generation = s;
-
-        let delay = cutover_stagger_delay(session_id, generation);
-        assert!(
-            (1000..=1999).contains(&delay.as_millis()),
-            "fuzzed inputs must always map into fixed stagger window"
-        );
-    }
-}
-
-#[test]
-fn cutover_stagger_delay_distribution_has_no_empty_buckets_under_sequential_sessions() {
-    let mut buckets = [0usize; 1000];
-    let generation = 4242u64;
-
-    for session_id in 0..250_000u64 {
-        let delay_ms = cutover_stagger_delay(session_id, generation).as_millis() as usize;
-        let idx = delay_ms - 1000;
-        buckets[idx] += 1;
-    }
-
-    let empty = buckets.iter().filter(|&&count| count == 0).count();
-    assert_eq!(
-        empty, 0,
-        "all 1000 delay buckets must be exercised to avoid cutover herd clustering"
-    );
-}
-
-#[test]
-fn light_fuzz_cutover_stagger_delay_distribution_stays_reasonably_uniform() {
-    let mut buckets = [0usize; 1000];
-    let mut s: u64 = 0x1BAD_B002_CAFE_F00D;
-
-    for _ in 0..300_000usize {
-        s ^= s << 7;
-        s ^= s >> 9;
-        s ^= s << 8;
-        let session_id = s;
-
-        s ^= s << 7;
-        s ^= s >> 9;
-        s ^= s << 8;
-        let generation = s;
-
-        let delay_ms = cutover_stagger_delay(session_id, generation).as_millis() as usize;
-        buckets[delay_ms - 1000] += 1;
-    }
-
-    let min = *buckets.iter().min().unwrap_or(&0);
-    let max = *buckets.iter().max().unwrap_or(&0);
-    assert!(min > 0, "fuzzed distribution must not leave empty buckets");
-    assert!(
-        max <= min.saturating_mul(3),
-        "bucket skew is too high for anti-herd staggering (max={max}, min={min})"
-    );
-}
-
-#[test]
-fn stress_cutover_stagger_delay_distribution_remains_stable_across_generations() {
-    for generation in [0u64, 1, 7, 31, 255, 1024, u32::MAX as u64, u64::MAX - 1] {
-        let mut buckets = [0usize; 1000];
-        for session_id in 0..100_000u64 {
-            let delay_ms = cutover_stagger_delay(session_id ^ 0x9E37_79B9, generation)
-                .as_millis() as usize;
-            buckets[delay_ms - 1000] += 1;
-        }
-
-        let min = *buckets.iter().min().unwrap_or(&0);
-        let max = *buckets.iter().max().unwrap_or(&0);
-        assert!(
-            max <= min.saturating_mul(4).max(1),
-            "generation={generation}: distribution collapsed (max={max}, min={min})"
-        );
-    }
-}
@@ -0,0 +1,46 @@
+/// Session eviction is intentionally disabled in runtime.
+///
+/// The initial `user+dc` single-lease model caused valid parallel client
+/// connections to evict each other. Keep the API shape for compatibility,
+/// but make it a no-op until a safer policy is introduced.
+
+#[derive(Debug, Clone, Default)]
+pub struct SessionLease;
+
+impl SessionLease {
+    pub fn is_stale(&self) -> bool {
+        false
+    }
+
+    #[allow(dead_code)]
+    pub fn release(&self) {}
+}
+
+pub struct RegistrationResult {
+    pub lease: SessionLease,
+    pub replaced_existing: bool,
+}
+
+pub fn register_session(_user: &str, _dc_idx: i16) -> RegistrationResult {
+    RegistrationResult {
+        lease: SessionLease,
+        replaced_existing: false,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_session_eviction_disabled_behavior() {
+        let first = register_session("alice", 2);
+        let second = register_session("alice", 2);
+        assert!(!first.replaced_existing);
+        assert!(!second.replaced_existing);
+        assert!(!first.lease.is_stale());
+        assert!(!second.lease.is_stale());
+        first.lease.release();
+        second.lease.release();
+    }
+}
@@ -1,265 +0,0 @@
-use super::*;
-use std::panic::{self, AssertUnwindSafe};
-use std::sync::Arc;
-use std::time::Duration;
-use tokio::sync::Barrier;
-
-#[test]
-fn direct_connection_lease_balances_on_drop() {
-    let stats = Arc::new(Stats::new());
-    assert_eq!(stats.get_current_connections_direct(), 0);
-
-    {
-        let _lease = stats.acquire_direct_connection_lease();
-        assert_eq!(stats.get_current_connections_direct(), 1);
-    }
-
-    assert_eq!(stats.get_current_connections_direct(), 0);
-}
-
-#[test]
-fn middle_connection_lease_balances_on_drop() {
-    let stats = Arc::new(Stats::new());
-    assert_eq!(stats.get_current_connections_me(), 0);
-
-    {
-        let _lease = stats.acquire_me_connection_lease();
-        assert_eq!(stats.get_current_connections_me(), 1);
-    }
-
-    assert_eq!(stats.get_current_connections_me(), 0);
-}
-
-#[test]
-fn connection_lease_disarm_prevents_double_release() {
-    let stats = Arc::new(Stats::new());
-
-    let mut lease = stats.acquire_direct_connection_lease();
-    assert_eq!(stats.get_current_connections_direct(), 1);
-
-    stats.decrement_current_connections_direct();
-    assert_eq!(stats.get_current_connections_direct(), 0);
-
-    lease.disarm();
-    drop(lease);
-
-    assert_eq!(stats.get_current_connections_direct(), 0);
-}
-
-#[test]
-fn direct_connection_lease_balances_on_panic_unwind() {
-    let stats = Arc::new(Stats::new());
-    let stats_for_panic = stats.clone();
-
-    let panic_result = panic::catch_unwind(AssertUnwindSafe(move || {
-        let _lease = stats_for_panic.acquire_direct_connection_lease();
-        panic!("intentional panic to verify lease drop path");
-    }));
-
-    assert!(panic_result.is_err(), "panic must propagate from test closure");
-    assert_eq!(
-        stats.get_current_connections_direct(),
-        0,
-        "panic unwind must release direct route gauge"
-    );
-}
-
-#[test]
-fn middle_connection_lease_balances_on_panic_unwind() {
-    let stats = Arc::new(Stats::new());
-    let stats_for_panic = stats.clone();
-
-    let panic_result = panic::catch_unwind(AssertUnwindSafe(move || {
-        let _lease = stats_for_panic.acquire_me_connection_lease();
-        panic!("intentional panic to verify middle lease drop path");
-    }));
-
-    assert!(panic_result.is_err(), "panic must propagate from test closure");
-    assert_eq!(
-        stats.get_current_connections_me(),
-        0,
-        "panic unwind must release middle route gauge"
-    );
-}
-
-#[tokio::test]
-async fn concurrent_mixed_route_lease_churn_balances_to_zero() {
-    const TASKS: usize = 48;
-    const ITERATIONS_PER_TASK: usize = 256;
-
-    let stats = Arc::new(Stats::new());
-    let barrier = Arc::new(Barrier::new(TASKS));
-    let mut workers = Vec::with_capacity(TASKS);
-
-    for task_idx in 0..TASKS {
-        let stats_for_task = stats.clone();
-        let barrier_for_task = barrier.clone();
-        workers.push(tokio::spawn(async move {
-            barrier_for_task.wait().await;
-            for iter in 0..ITERATIONS_PER_TASK {
-                if (task_idx + iter) % 2 == 0 {
-                    let _lease = stats_for_task.acquire_direct_connection_lease();
-                    tokio::task::yield_now().await;
-                } else {
-                    let _lease = stats_for_task.acquire_me_connection_lease();
-                    tokio::task::yield_now().await;
-                }
-            }
-        }));
-    }
-
-    for worker in workers {
-        worker
-            .await
-            .expect("lease churn worker must not panic");
-    }
-
-    assert_eq!(
-        stats.get_current_connections_direct(),
-        0,
-        "direct route gauge must return to zero after concurrent lease churn"
-    );
-    assert_eq!(
-        stats.get_current_connections_me(),
-        0,
-        "middle route gauge must return to zero after concurrent lease churn"
-    );
-}
-
-#[tokio::test]
-async fn abort_storm_mixed_route_leases_returns_all_gauges_to_zero() {
-    const TASKS: usize = 64;
-
-    let stats = Arc::new(Stats::new());
-    let mut workers = Vec::with_capacity(TASKS);
-
-    for task_idx in 0..TASKS {
-        let stats_for_task = stats.clone();
-        workers.push(tokio::spawn(async move {
-            if task_idx % 2 == 0 {
-                let _lease = stats_for_task.acquire_direct_connection_lease();
-                tokio::time::sleep(Duration::from_secs(60)).await;
-            } else {
-                let _lease = stats_for_task.acquire_me_connection_lease();
-                tokio::time::sleep(Duration::from_secs(60)).await;
-            }
-        }));
-    }
-
-    tokio::time::timeout(Duration::from_secs(2), async {
-        loop {
-            let total = stats.get_current_connections_direct() + stats.get_current_connections_me();
-            if total == TASKS as u64 {
-                break;
-            }
-            tokio::time::sleep(Duration::from_millis(10)).await;
-        }
-    })
-    .await
-    .expect("all storm tasks must acquire route leases before abort");
-
-    for worker in &workers {
-        worker.abort();
-    }
-    for worker in workers {
-        let joined = worker.await;
-        assert!(joined.is_err(), "aborted worker must return join error");
-    }
-
-    tokio::time::timeout(Duration::from_secs(2), async {
-        loop {
-            if stats.get_current_connections_direct() == 0 && stats.get_current_connections_me() == 0 {
-                break;
-            }
-            tokio::time::sleep(Duration::from_millis(10)).await;
-        }
-    })
-    .await
-    .expect("all route gauges must drain to zero after abort storm");
-}
-
-#[test]
-fn saturating_route_decrements_do_not_underflow_under_race() {
-    const THREADS: usize = 16;
-    const DECREMENTS_PER_THREAD: usize = 4096;
-
-    let stats = Arc::new(Stats::new());
-    let mut workers = Vec::with_capacity(THREADS);
-
-    for _ in 0..THREADS {
-        let stats_for_thread = stats.clone();
-        workers.push(std::thread::spawn(move || {
-            for _ in 0..DECREMENTS_PER_THREAD {
-                stats_for_thread.decrement_current_connections_direct();
-                stats_for_thread.decrement_current_connections_me();
-            }
-        }));
-    }
-
-    for worker in workers {
-        worker
-            .join()
-            .expect("decrement race worker must not panic");
-    }
-
-    assert_eq!(
-        stats.get_current_connections_direct(),
-        0,
-        "direct route decrement races must never underflow"
-    );
-    assert_eq!(
-        stats.get_current_connections_me(),
-        0,
-        "middle route decrement races must never underflow"
-    );
-}
-
-#[tokio::test]
-async fn direct_connection_lease_balances_on_task_abort() {
-    let stats = Arc::new(Stats::new());
-    let stats_for_task = stats.clone();
-
-    let task = tokio::spawn(async move {
-        let _lease = stats_for_task.acquire_direct_connection_lease();
-        tokio::time::sleep(Duration::from_secs(60)).await;
-    });
-
-    tokio::time::sleep(Duration::from_millis(20)).await;
-    assert_eq!(stats.get_current_connections_direct(), 1);
-
-    task.abort();
-    let joined = task.await;
-    assert!(joined.is_err(), "aborted task must return a join error");
-
-    tokio::time::sleep(Duration::from_millis(20)).await;
-    assert_eq!(
-        stats.get_current_connections_direct(),
-        0,
-        "aborted task must release direct route gauge"
-    );
-}
-
-#[tokio::test]
-async fn middle_connection_lease_balances_on_task_abort() {
-    let stats = Arc::new(Stats::new());
-    let stats_for_task = stats.clone();
-
-    let task = tokio::spawn(async move {
-        let _lease = stats_for_task.acquire_me_connection_lease();
-        tokio::time::sleep(Duration::from_secs(60)).await;
-    });
-
-    tokio::time::sleep(Duration::from_millis(20)).await;
-    assert_eq!(stats.get_current_connections_me(), 1);
-
-    task.abort();
-    let joined = task.await;
-    assert!(joined.is_err(), "aborted task must return a join error");
-
-    tokio::time::sleep(Duration::from_millis(20)).await;
-    assert_eq!(
-        stats.get_current_connections_me(),
-        0,
-        "aborted task must release middle route gauge"
-    );
-}
@@ -6,7 +6,6 @@ pub mod beobachten;
 pub mod telemetry;

 use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU64, Ordering};
-use std::sync::Arc;
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 use dashmap::DashMap;
 use parking_lot::Mutex;
@@ -20,46 +19,6 @@ use tracing::debug;
 use crate::config::{MeTelemetryLevel, MeWriterPickMode};
 use self::telemetry::TelemetryPolicy;

-#[derive(Clone, Copy)]
-enum RouteConnectionGauge {
-    Direct,
-    Middle,
-}
-
-#[must_use = "RouteConnectionLease must be kept alive to hold the connection gauge increment"]
-pub struct RouteConnectionLease {
-    stats: Arc<Stats>,
-    gauge: RouteConnectionGauge,
-    active: bool,
-}
-
-impl RouteConnectionLease {
-    fn new(stats: Arc<Stats>, gauge: RouteConnectionGauge) -> Self {
-        Self {
-            stats,
-            gauge,
-            active: true,
-        }
-    }
-
-    #[cfg(test)]
-    fn disarm(&mut self) {
-        self.active = false;
-    }
-}
-
-impl Drop for RouteConnectionLease {
-    fn drop(&mut self) {
-        if !self.active {
-            return;
-        }
-        match self.gauge {
-            RouteConnectionGauge::Direct => self.stats.decrement_current_connections_direct(),
-            RouteConnectionGauge::Middle => self.stats.decrement_current_connections_me(),
-        }
-    }
-}
-
 // ============= Stats =============

 #[derive(Default)]
@@ -161,7 +120,12 @@ pub struct Stats {
    pool_swap_total: AtomicU64,
    pool_drain_active: AtomicU64,
    pool_force_close_total: AtomicU64,
+    pool_drain_soft_evict_total: AtomicU64,
+    pool_drain_soft_evict_writer_total: AtomicU64,
    pool_stale_pick_total: AtomicU64,
+    me_writer_close_signal_drop_total: AtomicU64,
+    me_writer_close_signal_channel_full_total: AtomicU64,
+    me_draining_writers_reap_progress_total: AtomicU64,
    me_writer_removed_total: AtomicU64,
    me_writer_removed_unexpected_total: AtomicU64,
    me_refill_triggered_total: AtomicU64,
@@ -174,6 +138,11 @@ pub struct Stats {
    me_inline_recovery_total: AtomicU64,
    ip_reservation_rollback_tcp_limit_total: AtomicU64,
    ip_reservation_rollback_quota_limit_total: AtomicU64,
+    relay_adaptive_promotions_total: AtomicU64,
+    relay_adaptive_demotions_total: AtomicU64,
+    relay_adaptive_hard_promotions_total: AtomicU64,
+    reconnect_evict_total: AtomicU64,
+    reconnect_stale_close_total: AtomicU64,
    telemetry_core_enabled: AtomicBool,
    telemetry_user_enabled: AtomicBool,
    telemetry_me_level: AtomicU8,
@@ -326,15 +295,35 @@ impl Stats {
    pub fn decrement_current_connections_me(&self) {
        Self::decrement_atomic_saturating(&self.current_connections_me);
    }
-
-    pub fn acquire_direct_connection_lease(self: &Arc<Self>) -> RouteConnectionLease {
-        self.increment_current_connections_direct();
-        RouteConnectionLease::new(self.clone(), RouteConnectionGauge::Direct)
+    pub fn increment_relay_adaptive_promotions_total(&self) {
+        if self.telemetry_core_enabled() {
+            self.relay_adaptive_promotions_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
    }
-
-    pub fn acquire_me_connection_lease(self: &Arc<Self>) -> RouteConnectionLease {
-        self.increment_current_connections_me();
-        RouteConnectionLease::new(self.clone(), RouteConnectionGauge::Middle)
+    pub fn increment_relay_adaptive_demotions_total(&self) {
+        if self.telemetry_core_enabled() {
+            self.relay_adaptive_demotions_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_relay_adaptive_hard_promotions_total(&self) {
+        if self.telemetry_core_enabled() {
+            self.relay_adaptive_hard_promotions_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_reconnect_evict_total(&self) {
+        if self.telemetry_core_enabled() {
+            self.reconnect_evict_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_reconnect_stale_close_total(&self) {
+        if self.telemetry_core_enabled() {
+            self.reconnect_stale_close_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
    }
    pub fn increment_handshake_timeouts(&self) {
        if self.telemetry_core_enabled() {
@@ -731,11 +720,41 @@ impl Stats {
            self.pool_force_close_total.fetch_add(1, Ordering::Relaxed);
        }
    }
+    pub fn increment_pool_drain_soft_evict_total(&self) {
+        if self.telemetry_me_allows_normal() {
+            self.pool_drain_soft_evict_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_pool_drain_soft_evict_writer_total(&self) {
+        if self.telemetry_me_allows_normal() {
+            self.pool_drain_soft_evict_writer_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
    pub fn increment_pool_stale_pick_total(&self) {
        if self.telemetry_me_allows_normal() {
            self.pool_stale_pick_total.fetch_add(1, Ordering::Relaxed);
        }
    }
+    pub fn increment_me_writer_close_signal_drop_total(&self) {
+        if self.telemetry_me_allows_normal() {
+            self.me_writer_close_signal_drop_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_me_writer_close_signal_channel_full_total(&self) {
+        if self.telemetry_me_allows_normal() {
+            self.me_writer_close_signal_channel_full_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
+    pub fn increment_me_draining_writers_reap_progress_total(&self) {
+        if self.telemetry_me_allows_normal() {
+            self.me_draining_writers_reap_progress_total
+                .fetch_add(1, Ordering::Relaxed);
+        }
+    }
    pub fn increment_me_writer_removed_total(&self) {
        if self.telemetry_me_allows_debug() {
            self.me_writer_removed_total.fetch_add(1, Ordering::Relaxed);
@@ -984,6 +1003,22 @@ impl Stats {
        self.get_current_connections_direct()
            .saturating_add(self.get_current_connections_me())
    }
+    pub fn get_relay_adaptive_promotions_total(&self) -> u64 {
+        self.relay_adaptive_promotions_total.load(Ordering::Relaxed)
+    }
+    pub fn get_relay_adaptive_demotions_total(&self) -> u64 {
+        self.relay_adaptive_demotions_total.load(Ordering::Relaxed)
+    }
+    pub fn get_relay_adaptive_hard_promotions_total(&self) -> u64 {
+        self.relay_adaptive_hard_promotions_total
+            .load(Ordering::Relaxed)
+    }
+    pub fn get_reconnect_evict_total(&self) -> u64 {
+        self.reconnect_evict_total.load(Ordering::Relaxed)
+    }
+    pub fn get_reconnect_stale_close_total(&self) -> u64 {
+        self.reconnect_stale_close_total.load(Ordering::Relaxed)
+    }
    pub fn get_me_keepalive_sent(&self) -> u64 { self.me_keepalive_sent.load(Ordering::Relaxed) }
    pub fn get_me_keepalive_failed(&self) -> u64 { self.me_keepalive_failed.load(Ordering::Relaxed) }
    pub fn get_me_keepalive_pong(&self) -> u64 { self.me_keepalive_pong.load(Ordering::Relaxed) }
@@ -1236,9 +1271,26 @@ impl Stats {
    pub fn get_pool_force_close_total(&self) -> u64 {
        self.pool_force_close_total.load(Ordering::Relaxed)
    }
+    pub fn get_pool_drain_soft_evict_total(&self) -> u64 {
+        self.pool_drain_soft_evict_total.load(Ordering::Relaxed)
+    }
+    pub fn get_pool_drain_soft_evict_writer_total(&self) -> u64 {
+        self.pool_drain_soft_evict_writer_total.load(Ordering::Relaxed)
+    }
    pub fn get_pool_stale_pick_total(&self) -> u64 {
        self.pool_stale_pick_total.load(Ordering::Relaxed)
    }
+    pub fn get_me_writer_close_signal_drop_total(&self) -> u64 {
+        self.me_writer_close_signal_drop_total.load(Ordering::Relaxed)
+    }
+    pub fn get_me_writer_close_signal_channel_full_total(&self) -> u64 {
+        self.me_writer_close_signal_channel_full_total
+            .load(Ordering::Relaxed)
+    }
+    pub fn get_me_draining_writers_reap_progress_total(&self) -> u64 {
+        self.me_draining_writers_reap_progress_total
+            .load(Ordering::Relaxed)
+    }
    pub fn get_me_writer_removed_total(&self) -> u64 {
        self.me_writer_removed_total.load(Ordering::Relaxed)
    }
@@ -1307,35 +1359,11 @@ impl Stats {
        Self::touch_user_stats(stats.value());
        stats.curr_connects.fetch_add(1, Ordering::Relaxed);
    }
-
-    pub fn try_acquire_user_curr_connects(&self, user: &str, limit: Option<u64>) -> bool {
-        if !self.telemetry_user_enabled() {
-            return true;
-        }
-
-        self.maybe_cleanup_user_stats();
-        let stats = self.user_stats.entry(user.to_string()).or_default();
-        Self::touch_user_stats(stats.value());
-
-        let counter = &stats.curr_connects;
-        let mut current = counter.load(Ordering::Relaxed);
-        loop {
-            if let Some(max) = limit && current >= max {
-                return false;
-            }
-            match counter.compare_exchange_weak(
-                current,
-                current.saturating_add(1),
-                Ordering::Relaxed,
-                Ordering::Relaxed,
-            ) {
-                Ok(_) => return true,
-                Err(actual) => current = actual,
-            }
-        }
-    }
    
    pub fn decrement_user_curr_connects(&self, user: &str) {
+        if !self.telemetry_user_enabled() {
+            return;
+        }
        self.maybe_cleanup_user_stats();
        if let Some(stats) = self.user_stats.get(user) {
            Self::touch_user_stats(stats.value());
@@ -1508,11 +1536,9 @@ impl Stats {
 // ============= Replay Checker =============

 pub struct ReplayChecker {
-    handshake_shards: Vec<Mutex<ReplayShard>>,
-    tls_shards: Vec<Mutex<ReplayShard>>,
+    shards: Vec<Mutex<ReplayShard>>,
    shard_mask: usize,
    window: Duration,
-    tls_window: Duration,
    checks: AtomicU64,
    hits: AtomicU64,
    additions: AtomicU64,
@@ -1589,24 +1615,19 @@ impl ReplayShard {

 impl ReplayChecker {
    pub fn new(total_capacity: usize, window: Duration) -> Self {
-        const MIN_TLS_REPLAY_WINDOW: Duration = Duration::from_secs(120);
        let num_shards = 64;
        let shard_capacity = (total_capacity / num_shards).max(1);
        let cap = NonZeroUsize::new(shard_capacity).unwrap();

-        let mut handshake_shards = Vec::with_capacity(num_shards);
-        let mut tls_shards = Vec::with_capacity(num_shards);
+        let mut shards = Vec::with_capacity(num_shards);
        for _ in 0..num_shards {
-            handshake_shards.push(Mutex::new(ReplayShard::new(cap)));
-            tls_shards.push(Mutex::new(ReplayShard::new(cap)));
+            shards.push(Mutex::new(ReplayShard::new(cap)));
        }

        Self {
-            handshake_shards,
-            tls_shards,
+            shards,
            shard_mask: num_shards - 1,
            window,
-            tls_window: window.max(MIN_TLS_REPLAY_WINDOW),
            checks: AtomicU64::new(0),
            hits: AtomicU64::new(0),
            additions: AtomicU64::new(0),
@@ -1620,60 +1641,46 @@ impl ReplayChecker {
        (hasher.finish() as usize) & self.shard_mask
    }

-    fn check_and_add_internal(
-        &self,
-        data: &[u8],
-        shards: &[Mutex<ReplayShard>],
-        window: Duration,
-    ) -> bool {
+    fn check_and_add_internal(&self, data: &[u8]) -> bool {
        self.checks.fetch_add(1, Ordering::Relaxed);
        let idx = self.get_shard_idx(data);
-        let mut shard = shards[idx].lock();
+        let mut shard = self.shards[idx].lock();
        let now = Instant::now();
-        let found = shard.check(data, now, window);
+        let found = shard.check(data, now, self.window);
        if found {
            self.hits.fetch_add(1, Ordering::Relaxed);
        } else {
-            shard.add(data, now, window);
+            shard.add(data, now, self.window);
            self.additions.fetch_add(1, Ordering::Relaxed);
        }
        found
    }

-    fn add_only(&self, data: &[u8], shards: &[Mutex<ReplayShard>], window: Duration) {
+    fn add_only(&self, data: &[u8]) {
        self.additions.fetch_add(1, Ordering::Relaxed);
        let idx = self.get_shard_idx(data);
-        let mut shard = shards[idx].lock();
-        shard.add(data, Instant::now(), window);
+        let mut shard = self.shards[idx].lock();
+        shard.add(data, Instant::now(), self.window);
    }

    pub fn check_and_add_handshake(&self, data: &[u8]) -> bool {
-        self.check_and_add_internal(data, &self.handshake_shards, self.window)
+        self.check_and_add_internal(data)
    }

    pub fn check_and_add_tls_digest(&self, data: &[u8]) -> bool {
-        self.check_and_add_internal(data, &self.tls_shards, self.tls_window)
+        self.check_and_add_internal(data)
    }

    // Compatibility helpers (non-atomic split operations) — prefer check_and_add_*.
    pub fn check_handshake(&self, data: &[u8]) -> bool { self.check_and_add_handshake(data) }
-    pub fn add_handshake(&self, data: &[u8]) {
-        self.add_only(data, &self.handshake_shards, self.window)
-    }
+    pub fn add_handshake(&self, data: &[u8]) { self.add_only(data) }
    pub fn check_tls_digest(&self, data: &[u8]) -> bool { self.check_and_add_tls_digest(data) }
-    pub fn add_tls_digest(&self, data: &[u8]) {
-        self.add_only(data, &self.tls_shards, self.tls_window)
-    }
+    pub fn add_tls_digest(&self, data: &[u8]) { self.add_only(data) }
    
    pub fn stats(&self) -> ReplayStats {
        let mut total_entries = 0;
        let mut total_queue_len = 0;
-        for shard in &self.handshake_shards {
-            let s = shard.lock();
-            total_entries += s.cache.len();
-            total_queue_len += s.queue.len();
-        }
-        for shard in &self.tls_shards {
+        for shard in &self.shards {
            let s = shard.lock();
            total_entries += s.cache.len();
            total_queue_len += s.queue.len();
@@ -1686,7 +1693,7 @@ impl ReplayChecker {
            total_hits: self.hits.load(Ordering::Relaxed),
            total_additions: self.additions.load(Ordering::Relaxed),
            total_cleanups: self.cleanups.load(Ordering::Relaxed),
-            num_shards: self.handshake_shards.len() + self.tls_shards.len(),
+            num_shards: self.shards.len(),
            window_secs: self.window.as_secs(),
        }
    }
@@ -1704,20 +1711,13 @@ impl ReplayChecker {
            let now = Instant::now();
            let mut cleaned = 0usize;
            
-            for shard_mutex in &self.handshake_shards {
+            for shard_mutex in &self.shards {
                let mut shard = shard_mutex.lock();
                let before = shard.len();
                shard.cleanup(now, self.window);
                let after = shard.len();
                cleaned += before.saturating_sub(after);
            }
-            for shard_mutex in &self.tls_shards {
-                let mut shard = shard_mutex.lock();
-                let before = shard.len();
-                shard.cleanup(now, self.tls_window);
-                let after = shard.len();
-                cleaned += before.saturating_sub(after);
-            }
            
            self.cleanups.fetch_add(1, Ordering::Relaxed);
            
@@ -1843,7 +1843,7 @@ mod tests {
    fn test_replay_checker_many_keys() {
        let checker = ReplayChecker::new(10_000, Duration::from_secs(60));
        for i in 0..500u32 {
-            checker.add_handshake(&i.to_le_bytes());
+            checker.add_only(&i.to_le_bytes());
        }
        for i in 0..500u32 {
            assert!(checker.check_handshake(&i.to_le_bytes()));
@@ -1851,11 +1851,3 @@ mod tests {
        assert_eq!(checker.stats().total_entries, 500);
    }
 }
-
-#[cfg(test)]
-#[path = "connection_lease_security_tests.rs"]
-mod connection_lease_security_tests;
-
-#[cfg(test)]
-#[path = "replay_checker_security_tests.rs"]
-mod replay_checker_security_tests;
@@ -1,80 +0,0 @@
-use super::*;
-use std::time::Duration;
-
-#[test]
-fn replay_checker_keeps_tls_and_handshake_domains_isolated_for_same_key() {
-    let checker = ReplayChecker::new(128, Duration::from_millis(20));
-    let key = b"same-key-domain-separation";
-
-    assert!(
-        !checker.check_and_add_handshake(key),
-        "first handshake use should be fresh"
-    );
-    assert!(
-        !checker.check_and_add_tls_digest(key),
-        "same bytes in TLS domain should still be fresh"
-    );
-
-    assert!(
-        checker.check_and_add_handshake(key),
-        "second handshake use should be replay-hit"
-    );
-    assert!(
-        checker.check_and_add_tls_digest(key),
-        "second TLS use should be replay-hit independently"
-    );
-}
-
-#[test]
-fn replay_checker_tls_window_is_clamped_beyond_small_handshake_window() {
-    let checker = ReplayChecker::new(128, Duration::from_millis(20));
-    let handshake_key = b"short-window-handshake";
-    let tls_key = b"short-window-tls";
-
-    assert!(!checker.check_and_add_handshake(handshake_key));
-    assert!(!checker.check_and_add_tls_digest(tls_key));
-
-    std::thread::sleep(Duration::from_millis(80));
-
-    assert!(
-        !checker.check_and_add_handshake(handshake_key),
-        "handshake key should expire under short configured window"
-    );
-    assert!(
-        checker.check_and_add_tls_digest(tls_key),
-        "TLS key should still be replay-hit because TLS window is clamped to a secure minimum"
-    );
-}
-
-#[test]
-fn replay_checker_compat_add_paths_do_not_cross_pollute_domains() {
-    let checker = ReplayChecker::new(128, Duration::from_secs(1));
-    let key = b"compat-domain-separation";
-
-    checker.add_handshake(key);
-    assert!(
-        checker.check_and_add_handshake(key),
-        "handshake add helper must populate handshake domain"
-    );
-    assert!(
-        !checker.check_and_add_tls_digest(key),
-        "handshake add helper must not pollute TLS domain"
-    );
-
-    checker.add_tls_digest(key);
-    assert!(
-        checker.check_and_add_tls_digest(key),
-        "TLS add helper must populate TLS domain"
-    );
-}
-
-#[test]
-fn replay_checker_stats_reflect_dual_shard_domains() {
-    let checker = ReplayChecker::new(128, Duration::from_secs(1));
-    let stats = checker.stats();
-
-    assert_eq!(
-        stats.num_shards, 128,
-        "stats should expose both shard domains (handshake + TLS)"
-    );
-}
@@ -14,8 +14,7 @@ use std::sync::Arc;
 // ============= Configuration =============

 /// Default buffer size
-/// CHANGED: Reduced from 64KB to 16KB to match TLS record size and prevent bufferbloat.
-pub const DEFAULT_BUFFER_SIZE: usize = 16 * 1024;
+pub const DEFAULT_BUFFER_SIZE: usize = 64 * 1024;

 /// Default maximum number of pooled buffers
 pub const DEFAULT_MAX_BUFFERS: usize = 1024;
@@ -513,7 +513,6 @@ impl FrameCodecTrait for SecureCodec {
 #[cfg(test)]
 mod tests {
    use super::*;
-    use std::collections::HashSet;
    use tokio_util::codec::{FramedRead, FramedWrite};
    use tokio::io::duplex;
    use futures::{SinkExt, StreamExt};
@@ -631,31 +630,4 @@ mod tests {
        let result = codec.decode(&mut buf);
        assert!(result.is_err());
    }
-
-    #[test]
-    fn secure_codec_always_adds_padding_and_jitters_wire_length() {
-        let codec = SecureCodec::new(Arc::new(SecureRandom::new()));
-        let payload = Bytes::from_static(&[1, 2, 3, 4, 5, 6, 7, 8]);
-        let mut wire_lens = HashSet::new();
-
-        for _ in 0..64 {
-            let frame = Frame::new(payload.clone());
-            let mut out = BytesMut::new();
-            codec.encode(&frame, &mut out).unwrap();
-
-            assert!(out.len() >= 4 + payload.len() + 1);
-            let wire_len = u32::from_le_bytes([out[0], out[1], out[2], out[3]]) as usize;
-            assert!(
-                (payload.len() + 1..=payload.len() + 3).contains(&wire_len),
-                "Secure wire length must be payload+1..3, got {wire_len}"
-            );
-            assert_ne!(wire_len % 4, 0, "Secure wire length must be non-4-aligned");
-            wire_lens.insert(wire_len);
-        }
-
-        assert!(
-            wire_lens.len() >= 2,
-            "Secure padding should create observable wire-length jitter"
-        );
-    }
 }
@@ -117,6 +117,15 @@ pub fn build_emulated_server_hello(
    extensions.extend_from_slice(&0x002bu16.to_be_bytes());
    extensions.extend_from_slice(&(2u16).to_be_bytes());
    extensions.extend_from_slice(&0x0304u16.to_be_bytes());
+    if let Some(alpn_proto) = &alpn {
+        extensions.extend_from_slice(&0x0010u16.to_be_bytes());
+        let list_len: u16 = 1 + alpn_proto.len() as u16;
+        let ext_len: u16 = 2 + list_len;
+        extensions.extend_from_slice(&ext_len.to_be_bytes());
+        extensions.extend_from_slice(&list_len.to_be_bytes());
+        extensions.push(alpn_proto.len() as u8);
+        extensions.extend_from_slice(alpn_proto);
+    }
    let extensions_len = extensions.len() as u16;

    let body_len = 2 + // version
@@ -198,22 +207,8 @@ pub fn build_emulated_server_hello(
    }

    let mut app_data = Vec::new();
-    let alpn_marker = alpn
-        .as_ref()
-        .filter(|p| !p.is_empty() && p.len() <= u8::MAX as usize)
-        .map(|proto| {
-            let proto_list_len = 1usize + proto.len();
-            let ext_data_len = 2usize + proto_list_len;
-            let mut marker = Vec::with_capacity(4 + ext_data_len);
-            marker.extend_from_slice(&0x0010u16.to_be_bytes());
-            marker.extend_from_slice(&(ext_data_len as u16).to_be_bytes());
-            marker.extend_from_slice(&(proto_list_len as u16).to_be_bytes());
-            marker.push(proto.len() as u8);
-            marker.extend_from_slice(proto);
-            marker
-        });
    let mut payload_offset = 0usize;
-    for (idx, size) in sizes.into_iter().enumerate() {
+    for size in sizes {
        let mut rec = Vec::with_capacity(5 + size);
        rec.push(TLS_RECORD_APPLICATION);
        rec.extend_from_slice(&TLS_VERSION);
@@ -238,20 +233,7 @@ pub fn build_emulated_server_hello(
            }
        } else if size > 17 {
            let body_len = size - 17;
-            let mut body = Vec::with_capacity(body_len);
-            if idx == 0 && let Some(marker) = &alpn_marker {
-                if marker.len() <= body_len {
-                    body.extend_from_slice(marker);
-                    if body_len > marker.len() {
-                        body.extend_from_slice(&rng.bytes(body_len - marker.len()));
-                    }
-                } else {
-                    body.extend_from_slice(&rng.bytes(body_len));
-                }
-            } else {
-                body.extend_from_slice(&rng.bytes(body_len));
-            }
-            rec.extend_from_slice(&body);
+            rec.extend_from_slice(&rng.bytes(body_len));
            rec.push(0x16); // inner content type marker (handshake)
            rec.extend_from_slice(&rng.bytes(16)); // AEAD-like tag
        } else {
@@ -263,9 +245,8 @@ pub fn build_emulated_server_hello(
    // --- Combine ---
    // Optional NewSessionTicket mimic records (opaque ApplicationData for fingerprint).
    let mut tickets = Vec::new();
-    let ticket_count = new_session_tickets.min(4);
-    if ticket_count > 0 {
-        for _ in 0..ticket_count {
+    if new_session_tickets > 0 {
+        for _ in 0..new_session_tickets {
            let ticket_len: usize = rng.range(48) + 48;
            let mut rec = Vec::with_capacity(5 + ticket_len);
            rec.push(TLS_RECORD_APPLICATION);
@@ -292,10 +273,6 @@ pub fn build_emulated_server_hello(
    response
 }

-#[cfg(test)]
-#[path = "emulator_security_tests.rs"]
-mod security_tests;
-
 #[cfg(test)]
 mod tests {
    use std::time::SystemTime;
@@ -1,136 +0,0 @@
-use std::time::SystemTime;
-
-use crate::crypto::SecureRandom;
-use crate::protocol::constants::{TLS_RECORD_APPLICATION, TLS_RECORD_CHANGE_CIPHER, TLS_RECORD_HANDSHAKE};
-use crate::tls_front::emulator::build_emulated_server_hello;
-use crate::tls_front::types::{
-    CachedTlsData, ParsedServerHello, TlsBehaviorProfile, TlsCertPayload, TlsProfileSource,
-};
-
-fn make_cached(cert_payload: Option<crate::tls_front::types::TlsCertPayload>) -> CachedTlsData {
-    CachedTlsData {
-        server_hello_template: ParsedServerHello {
-            version: [0x03, 0x03],
-            random: [0u8; 32],
-            session_id: Vec::new(),
-            cipher_suite: [0x13, 0x01],
-            compression: 0,
-            extensions: Vec::new(),
-        },
-        cert_info: None,
-        cert_payload,
-        app_data_records_sizes: vec![64],
-        total_app_data_len: 64,
-        behavior_profile: TlsBehaviorProfile {
-            change_cipher_spec_count: 1,
-            app_data_record_sizes: vec![64],
-            ticket_record_sizes: Vec::new(),
-            source: TlsProfileSource::Default,
-        },
-        fetched_at: SystemTime::now(),
-        domain: "example.com".to_string(),
-    }
-}
-
-fn first_app_data_payload(response: &[u8]) -> &[u8] {
-    let hello_len = u16::from_be_bytes([response[3], response[4]]) as usize;
-    let ccs_start = 5 + hello_len;
-    let ccs_len = u16::from_be_bytes([response[ccs_start + 3], response[ccs_start + 4]]) as usize;
-    let app_start = ccs_start + 5 + ccs_len;
-    let app_len = u16::from_be_bytes([response[app_start + 3], response[app_start + 4]]) as usize;
-    &response[app_start + 5..app_start + 5 + app_len]
-}
-
-#[test]
-fn emulated_server_hello_ignores_oversized_alpn_when_marker_would_not_fit() {
-    let cached = make_cached(None);
-    let rng = SecureRandom::new();
-    let oversized_alpn = vec![0xAB; u8::MAX as usize + 1];
-
-    let response = build_emulated_server_hello(
-        b"secret",
-        &[0x11; 32],
-        &[0x22; 16],
-        &cached,
-        true,
-        &rng,
-        Some(oversized_alpn),
-        0,
-    );
-
-    assert_eq!(response[0], TLS_RECORD_HANDSHAKE);
-    let hello_len = u16::from_be_bytes([response[3], response[4]]) as usize;
-    let ccs_start = 5 + hello_len;
-    assert_eq!(response[ccs_start], TLS_RECORD_CHANGE_CIPHER);
-    let app_start = ccs_start + 6;
-    assert_eq!(response[app_start], TLS_RECORD_APPLICATION);
-
-    let payload = first_app_data_payload(&response);
-    let mut marker_prefix = Vec::new();
-    marker_prefix.extend_from_slice(&0x0010u16.to_be_bytes());
-    marker_prefix.extend_from_slice(&0x0102u16.to_be_bytes());
-    marker_prefix.extend_from_slice(&0x0100u16.to_be_bytes());
-    marker_prefix.push(0xff);
-    marker_prefix.extend_from_slice(&[0xab; 8]);
-    assert!(
-        !payload.starts_with(&marker_prefix),
-        "oversized ALPN must not be partially embedded into the emulated first application record"
-    );
-}
-
-#[test]
-fn emulated_server_hello_embeds_full_alpn_marker_when_body_can_fit() {
-    let cached = make_cached(None);
-    let rng = SecureRandom::new();
-
-    let response = build_emulated_server_hello(
-        b"secret",
-        &[0x31; 32],
-        &[0x41; 16],
-        &cached,
-        true,
-        &rng,
-        Some(b"h2".to_vec()),
-        0,
-    );
-
-    let payload = first_app_data_payload(&response);
-    let expected = [0x00u8, 0x10, 0x00, 0x05, 0x00, 0x03, 0x02, b'h', b'2'];
-    assert!(
-        payload.starts_with(&expected),
-        "when body has enough capacity, emulated first application record must include full ALPN marker"
-    );
-}
-
-#[test]
-fn emulated_server_hello_prefers_cert_payload_over_alpn_marker() {
-    let cert_msg = vec![0x0b, 0x00, 0x00, 0x05, 0x00, 0xaa, 0xbb, 0xcc, 0xdd];
-    let cached = make_cached(Some(TlsCertPayload {
-        cert_chain_der: vec![vec![0x30, 0x01, 0x00]],
-        certificate_message: cert_msg.clone(),
-    }));
-    let rng = SecureRandom::new();
-
-    let response = build_emulated_server_hello(
-        b"secret",
-        &[0x32; 32],
-        &[0x42; 16],
-        &cached,
-        true,
-        &rng,
-        Some(b"h2".to_vec()),
-        0,
-    );
-
-    let payload = first_app_data_payload(&response);
-    let alpn_marker = [0x00u8, 0x10, 0x00, 0x05, 0x00, 0x03, 0x02, b'h', b'2'];
-
-    assert!(
-        payload.starts_with(&cert_msg),
-        "when certificate payload is available, first record must start with cert payload bytes"
-    );
-    assert!(
-        !payload.starts_with(&alpn_marker),
-        "ALPN marker must not displace selected certificate payload"
-    );
-}
@@ -298,7 +298,13 @@ async fn run_update_cycle(
    pool.update_runtime_reinit_policy(
        cfg.general.hardswap,
        cfg.general.me_pool_drain_ttl_secs,
+        cfg.general.me_instadrain,
        cfg.general.me_pool_drain_threshold,
+        cfg.general.me_pool_drain_soft_evict_enabled,
+        cfg.general.me_pool_drain_soft_evict_grace_secs,
+        cfg.general.me_pool_drain_soft_evict_per_writer,
+        cfg.general.me_pool_drain_soft_evict_budget_per_core,
+        cfg.general.me_pool_drain_soft_evict_cooldown_ms,
        cfg.general.effective_me_pool_force_close_secs(),
        cfg.general.me_pool_min_fresh_ratio,
        cfg.general.me_hardswap_warmup_delay_min_ms,
@@ -525,7 +531,13 @@ pub async fn me_config_updater(
                pool.update_runtime_reinit_policy(
                    cfg.general.hardswap,
                    cfg.general.me_pool_drain_ttl_secs,
+                    cfg.general.me_instadrain,
                    cfg.general.me_pool_drain_threshold,
+                    cfg.general.me_pool_drain_soft_evict_enabled,
+                    cfg.general.me_pool_drain_soft_evict_grace_secs,
+                    cfg.general.me_pool_drain_soft_evict_per_writer,
+                    cfg.general.me_pool_drain_soft_evict_budget_per_core,
+                    cfg.general.me_pool_drain_soft_evict_cooldown_ms,
                    cfg.general.effective_me_pool_force_close_secs(),
                    cfg.general.me_pool_min_fresh_ratio,
                    cfg.general.me_hardswap_warmup_delay_min_ms,
@@ -12,6 +12,7 @@ use crate::crypto::SecureRandom;
 use crate::network::IpFamily;

 use super::MePool;
+use super::pool::MeWriter;

 const JITTER_FRAC_NUM: u64 = 2; // jitter up to 50% of backoff
 #[allow(dead_code)]
@@ -28,6 +29,10 @@ const HEALTH_RECONNECT_BUDGET_MAX: usize = 128;
 const HEALTH_DRAIN_CLOSE_BUDGET_PER_CORE: usize = 16;
 const HEALTH_DRAIN_CLOSE_BUDGET_MIN: usize = 16;
 const HEALTH_DRAIN_CLOSE_BUDGET_MAX: usize = 256;
+const HEALTH_DRAIN_SOFT_EVICT_BUDGET_MIN: usize = 8;
+const HEALTH_DRAIN_SOFT_EVICT_BUDGET_MAX: usize = 256;
+const HEALTH_DRAIN_REAP_OPPORTUNISTIC_INTERVAL_SECS: u64 = 1;
+const HEALTH_DRAIN_TIMEOUT_ENFORCER_INTERVAL_SECS: u64 = 1;

 #[derive(Debug, Clone)]
 struct DcFloorPlanEntry {
@@ -66,6 +71,7 @@ pub async fn me_health_monitor(pool: Arc<MePool>, rng: Arc<SecureRandom>, _min_c
    let mut adaptive_recover_until: HashMap<(i32, IpFamily), Instant> = HashMap::new();
    let mut floor_warn_next_allowed: HashMap<(i32, IpFamily), Instant> = HashMap::new();
    let mut drain_warn_next_allowed: HashMap<u64, Instant> = HashMap::new();
+    let mut drain_soft_evict_next_allowed: HashMap<u64, Instant> = HashMap::new();
    let mut degraded_interval = true;
    loop {
        let interval = if degraded_interval {
@@ -75,7 +81,12 @@ pub async fn me_health_monitor(pool: Arc<MePool>, rng: Arc<SecureRandom>, _min_c
        };
        tokio::time::sleep(interval).await;
        pool.prune_closed_writers().await;
-        reap_draining_writers(&pool, &mut drain_warn_next_allowed).await;
+        reap_draining_writers(
+            &pool,
+            &mut drain_warn_next_allowed,
+            &mut drain_soft_evict_next_allowed,
+        )
+        .await;
        let v4_degraded = check_family(
            IpFamily::V4,
            &pool,
@@ -91,6 +102,8 @@ pub async fn me_health_monitor(pool: Arc<MePool>, rng: Arc<SecureRandom>, _min_c
            &mut adaptive_idle_since,
            &mut adaptive_recover_until,
            &mut floor_warn_next_allowed,
+            &mut drain_warn_next_allowed,
+            &mut drain_soft_evict_next_allowed,
        )
        .await;
        let v6_degraded = check_family(
@@ -108,15 +121,67 @@ pub async fn me_health_monitor(pool: Arc<MePool>, rng: Arc<SecureRandom>, _min_c
            &mut adaptive_idle_since,
            &mut adaptive_recover_until,
            &mut floor_warn_next_allowed,
+            &mut drain_warn_next_allowed,
+            &mut drain_soft_evict_next_allowed,
        )
        .await;
        degraded_interval = v4_degraded || v6_degraded;
    }
 }

+pub async fn me_drain_timeout_enforcer(pool: Arc<MePool>) {
+    let mut drain_warn_next_allowed: HashMap<u64, Instant> = HashMap::new();
+    let mut drain_soft_evict_next_allowed: HashMap<u64, Instant> = HashMap::new();
+    loop {
+        tokio::time::sleep(Duration::from_secs(
+            HEALTH_DRAIN_TIMEOUT_ENFORCER_INTERVAL_SECS,
+        ))
+        .await;
+        reap_draining_writers(
+            &pool,
+            &mut drain_warn_next_allowed,
+            &mut drain_soft_evict_next_allowed,
+        )
+        .await;
+    }
+}
+
+fn draining_writer_timeout_expired(
+    pool: &MePool,
+    writer: &MeWriter,
+    now_epoch_secs: u64,
+    drain_ttl_secs: u64,
+) -> bool {
+    if pool
+        .me_instadrain
+        .load(std::sync::atomic::Ordering::Relaxed)
+    {
+        return true;
+    }
+
+    let deadline_epoch_secs = writer
+        .drain_deadline_epoch_secs
+        .load(std::sync::atomic::Ordering::Relaxed);
+    if deadline_epoch_secs != 0 {
+        return now_epoch_secs >= deadline_epoch_secs;
+    }
+
+    if drain_ttl_secs == 0 {
+        return false;
+    }
+    let drain_started_at_epoch_secs = writer
+        .draining_started_at_epoch_secs
+        .load(std::sync::atomic::Ordering::Relaxed);
+    if drain_started_at_epoch_secs == 0 {
+        return false;
+    }
+    now_epoch_secs.saturating_sub(drain_started_at_epoch_secs) > drain_ttl_secs
+}
+
 pub(super) async fn reap_draining_writers(
    pool: &Arc<MePool>,
    warn_next_allowed: &mut HashMap<u64, Instant>,
+    soft_evict_next_allowed: &mut HashMap<u64, Instant>,
 ) {
    let now_epoch_secs = MePool::now_epoch_secs();
    let now = Instant::now();
@@ -124,15 +189,20 @@ pub(super) async fn reap_draining_writers(
    let drain_threshold = pool
        .me_pool_drain_threshold
        .load(std::sync::atomic::Ordering::Relaxed);
+    let writers = pool.writers.read().await.clone();
    let activity = pool.registry.writer_activity_snapshot().await;
-    let mut draining_writers = Vec::<DrainingWriterSnapshot>::new();
+    let mut draining_writers = Vec::new();
    let mut empty_writer_ids = Vec::<u64>::new();
+    let mut timeout_expired_writer_ids = Vec::<u64>::new();
    let mut force_close_writer_ids = Vec::<u64>::new();
-    let writers = pool.writers.read().await;
-    for writer in writers.iter() {
+    for writer in writers {
        if !writer.draining.load(std::sync::atomic::Ordering::Relaxed) {
            continue;
        }
+        if draining_writer_timeout_expired(pool, &writer, now_epoch_secs, drain_ttl_secs) {
+            timeout_expired_writer_ids.push(writer.id);
+            continue;
+        }
        if activity
            .bound_clients_by_writer
            .get(&writer.id)
@@ -143,38 +213,23 @@ pub(super) async fn reap_draining_writers(
            empty_writer_ids.push(writer.id);
            continue;
        }
-        draining_writers.push(DrainingWriterSnapshot {
-            id: writer.id,
-            writer_dc: writer.writer_dc,
-            addr: writer.addr,
-            generation: writer.generation,
-            created_at: writer.created_at,
-            draining_started_at_epoch_secs: writer
-                .draining_started_at_epoch_secs
-                .load(std::sync::atomic::Ordering::Relaxed),
-            drain_deadline_epoch_secs: writer
-                .drain_deadline_epoch_secs
-                .load(std::sync::atomic::Ordering::Relaxed),
-            allow_drain_fallback: writer
-                .allow_drain_fallback
-                .load(std::sync::atomic::Ordering::Relaxed),
-        });
+        draining_writers.push(writer);
    }
-    drop(writers);

-    let overflow = if drain_threshold > 0 && draining_writers.len() > drain_threshold as usize {
-        draining_writers.len().saturating_sub(drain_threshold as usize)
-    } else {
-        0
-    };
-
-    if overflow > 0 {
+    if drain_threshold > 0 && draining_writers.len() > drain_threshold as usize {
        draining_writers.sort_by(|left, right| {
-            left.draining_started_at_epoch_secs
-                .cmp(&right.draining_started_at_epoch_secs)
+            let left_started = left
+                .draining_started_at_epoch_secs
+                .load(std::sync::atomic::Ordering::Relaxed);
+            let right_started = right
+                .draining_started_at_epoch_secs
+                .load(std::sync::atomic::Ordering::Relaxed);
+            left_started
+                .cmp(&right_started)
                .then_with(|| left.created_at.cmp(&right.created_at))
                .then_with(|| left.id.cmp(&right.id))
        });
+        let overflow = draining_writers.len().saturating_sub(drain_threshold as usize);
        warn!(
            draining_writers = draining_writers.len(),
            me_pool_drain_threshold = drain_threshold,
@@ -186,10 +241,15 @@ pub(super) async fn reap_draining_writers(
        }
    }

-    for writer in draining_writers {
+    let mut active_draining_writer_ids = HashSet::with_capacity(draining_writers.len());
+    for writer in &draining_writers {
+        active_draining_writer_ids.insert(writer.id);
+        let drain_started_at_epoch_secs = writer
+            .draining_started_at_epoch_secs
+            .load(std::sync::atomic::Ordering::Relaxed);
        if drain_ttl_secs > 0
-            && writer.draining_started_at_epoch_secs != 0
-            && now_epoch_secs.saturating_sub(writer.draining_started_at_epoch_secs) > drain_ttl_secs
+            && drain_started_at_epoch_secs != 0
+            && now_epoch_secs.saturating_sub(drain_started_at_epoch_secs) > drain_ttl_secs
            && should_emit_writer_warn(
                warn_next_allowed,
                writer.id,
@@ -204,22 +264,109 @@ pub(super) async fn reap_draining_writers(
                generation = writer.generation,
                drain_ttl_secs,
                force_close_secs = pool.me_pool_force_close_secs.load(std::sync::atomic::Ordering::Relaxed),
-                allow_drain_fallback = writer.allow_drain_fallback,
+                allow_drain_fallback = writer.allow_drain_fallback.load(std::sync::atomic::Ordering::Relaxed),
                "ME draining writer remains non-empty past drain TTL"
            );
        }
-        if writer.drain_deadline_epoch_secs != 0 && now_epoch_secs >= writer.drain_deadline_epoch_secs
-        {
-            warn!(writer_id = writer.id, "Drain timeout, force-closing");
-            force_close_writer_ids.push(writer.id);
+    }
+
+    warn_next_allowed.retain(|writer_id, _| active_draining_writer_ids.contains(writer_id));
+    soft_evict_next_allowed.retain(|writer_id, _| active_draining_writer_ids.contains(writer_id));
+
+    if pool.drain_soft_evict_enabled() && drain_ttl_secs > 0 && !draining_writers.is_empty() {
+        let mut force_close_ids = HashSet::<u64>::with_capacity(force_close_writer_ids.len());
+        for writer_id in &force_close_writer_ids {
+            force_close_ids.insert(*writer_id);
+        }
+        let soft_grace_secs = pool.drain_soft_evict_grace_secs();
+        let soft_trigger_age_secs = drain_ttl_secs.saturating_add(soft_grace_secs);
+        let per_writer_limit = pool.drain_soft_evict_per_writer();
+        let soft_budget = health_drain_soft_evict_budget(pool);
+        let soft_cooldown = pool.drain_soft_evict_cooldown();
+        let mut soft_evicted_total = 0usize;
+
+        for writer in &draining_writers {
+            if soft_evicted_total >= soft_budget {
+                break;
+            }
+            if force_close_ids.contains(&writer.id) {
+                continue;
+            }
+            if pool.writer_accepts_new_binding(writer) {
+                continue;
+            }
+            let started_epoch_secs = writer
+                .draining_started_at_epoch_secs
+                .load(std::sync::atomic::Ordering::Relaxed);
+            if started_epoch_secs == 0
+                || now_epoch_secs.saturating_sub(started_epoch_secs) < soft_trigger_age_secs
+            {
+                continue;
+            }
+            if !should_emit_writer_warn(
+                soft_evict_next_allowed,
+                writer.id,
+                now,
+                soft_cooldown,
+            ) {
+                continue;
+            }
+
+            let remaining_budget = soft_budget.saturating_sub(soft_evicted_total);
+            let limit = per_writer_limit.min(remaining_budget);
+            if limit == 0 {
+                break;
+            }
+            let conn_ids = pool
+                .registry
+                .bound_conn_ids_for_writer_limited(writer.id, limit)
+                .await;
+            if conn_ids.is_empty() {
+                continue;
+            }
+
+            let mut evicted_for_writer = 0usize;
+            for conn_id in conn_ids {
+                if pool.registry.evict_bound_conn_if_writer(conn_id, writer.id).await {
+                    evicted_for_writer = evicted_for_writer.saturating_add(1);
+                    soft_evicted_total = soft_evicted_total.saturating_add(1);
+                    pool.stats.increment_pool_drain_soft_evict_total();
+                    if soft_evicted_total >= soft_budget {
+                        break;
+                    }
+                }
+            }
+
+            if evicted_for_writer > 0 {
+                pool.stats.increment_pool_drain_soft_evict_writer_total();
+                info!(
+                    writer_id = writer.id,
+                    writer_dc = writer.writer_dc,
+                    endpoint = %writer.addr,
+                    drained_connections = evicted_for_writer,
+                    soft_budget,
+                    soft_trigger_age_secs,
+                    "ME draining writer soft-evicted bound clients"
+                );
+            }
        }
    }

-    let close_budget = health_drain_close_budget();
+    let mut closed_writer_ids = HashSet::<u64>::new();
+    for writer_id in timeout_expired_writer_ids {
+        if !closed_writer_ids.insert(writer_id) {
+            continue;
+        }
+        pool.stats.increment_pool_force_close_total();
+        pool.remove_writer_and_close_clients(writer_id).await;
+        pool.stats
+            .increment_me_draining_writers_reap_progress_total();
+    }
+
    let requested_force_close = force_close_writer_ids.len();
    let requested_empty_close = empty_writer_ids.len();
    let requested_close_total = requested_force_close.saturating_add(requested_empty_close);
-    let mut closed_writer_ids = HashSet::<u64>::new();
+    let close_budget = health_drain_close_budget();
    let mut closed_total = 0usize;
    for writer_id in force_close_writer_ids {
        if closed_total >= close_budget {
@@ -230,6 +377,8 @@ pub(super) async fn reap_draining_writers(
        }
        pool.stats.increment_pool_force_close_total();
        pool.remove_writer_and_close_clients(writer_id).await;
+        pool.stats
+            .increment_me_draining_writers_reap_progress_total();
        closed_total = closed_total.saturating_add(1);
    }
    for writer_id in empty_writer_ids {
@@ -239,9 +388,9 @@ pub(super) async fn reap_draining_writers(
        if !closed_writer_ids.insert(writer_id) {
            continue;
        }
-        if !pool.remove_writer_if_empty(writer_id).await {
-            continue;
-        }
+        pool.remove_writer_and_close_clients(writer_id).await;
+        pool.stats
+            .increment_me_draining_writers_reap_progress_total();
        closed_total = closed_total.saturating_add(1);
    }

@@ -254,18 +403,6 @@ pub(super) async fn reap_draining_writers(
            "ME draining close backlog deferred to next health cycle"
        );
    }
-
-    // Keep warn cooldown state for draining writers still present in the pool;
-    // drop state only once a writer is actually removed.
-    let active_draining_writer_ids = {
-        let writers = pool.writers.read().await;
-        writers
-            .iter()
-            .filter(|writer| writer.draining.load(std::sync::atomic::Ordering::Relaxed))
-            .map(|writer| writer.id)
-            .collect::<HashSet<u64>>()
-    };
-    warn_next_allowed.retain(|writer_id, _| active_draining_writer_ids.contains(writer_id));
 }

 pub(super) fn health_drain_close_budget() -> usize {
@@ -277,16 +414,17 @@ pub(super) fn health_drain_close_budget() -> usize {
        .clamp(HEALTH_DRAIN_CLOSE_BUDGET_MIN, HEALTH_DRAIN_CLOSE_BUDGET_MAX)
 }

-#[derive(Debug, Clone)]
-struct DrainingWriterSnapshot {
-    id: u64,
-    writer_dc: i32,
-    addr: SocketAddr,
-    generation: u64,
-    created_at: Instant,
-    draining_started_at_epoch_secs: u64,
-    drain_deadline_epoch_secs: u64,
-    allow_drain_fallback: bool,
+pub(super) fn health_drain_soft_evict_budget(pool: &MePool) -> usize {
+    let cpu_cores = std::thread::available_parallelism()
+        .map(std::num::NonZeroUsize::get)
+        .unwrap_or(1);
+    let per_core = pool.drain_soft_evict_budget_per_core();
+    cpu_cores
+        .saturating_mul(per_core)
+        .clamp(
+            HEALTH_DRAIN_SOFT_EVICT_BUDGET_MIN,
+            HEALTH_DRAIN_SOFT_EVICT_BUDGET_MAX,
+        )
 }

 fn should_emit_writer_warn(
@@ -321,6 +459,8 @@ async fn check_family(
    adaptive_idle_since: &mut HashMap<(i32, IpFamily), Instant>,
    adaptive_recover_until: &mut HashMap<(i32, IpFamily), Instant>,
    floor_warn_next_allowed: &mut HashMap<(i32, IpFamily), Instant>,
+    drain_warn_next_allowed: &mut HashMap<u64, Instant>,
+    drain_soft_evict_next_allowed: &mut HashMap<u64, Instant>,
 ) -> bool {
    let enabled = match family {
        IpFamily::V4 => pool.decision.ipv4_me,
@@ -401,8 +541,15 @@ async fn check_family(
        floor_plan.active_writers_current,
        floor_plan.warm_writers_current,
    );
+    let mut next_drain_reap_at = Instant::now();

    for (dc, endpoints) in dc_endpoints {
+        if Instant::now() >= next_drain_reap_at {
+            reap_draining_writers(pool, drain_warn_next_allowed, drain_soft_evict_next_allowed)
+                .await;
+            next_drain_reap_at = Instant::now()
+                + Duration::from_secs(HEALTH_DRAIN_REAP_OPPORTUNISTIC_INTERVAL_SECS);
+        }
        if endpoints.is_empty() {
            continue;
        }
@@ -546,6 +693,12 @@ async fn check_family(

        let mut restored = 0usize;
        for _ in 0..missing {
+            if Instant::now() >= next_drain_reap_at {
+                reap_draining_writers(pool, drain_warn_next_allowed, drain_soft_evict_next_allowed)
+                    .await;
+                next_drain_reap_at = Instant::now()
+                    + Duration::from_secs(HEALTH_DRAIN_REAP_OPPORTUNISTIC_INTERVAL_SECS);
+            }
            if reconnect_budget == 0 {
                break;
            }
@@ -1422,15 +1575,6 @@ mod tests {
            me_pool_drain_threshold,
            ..GeneralConfig::default()
        };
-        let mut proxy_map_v4 = HashMap::new();
-        proxy_map_v4.insert(
-            2,
-            vec![(IpAddr::V4(Ipv4Addr::new(203, 0, 113, 10)), 443)],
-        );
-        let decision = NetworkDecision {
-            ipv4_me: true,
-            ..NetworkDecision::default()
-        };
        MePool::new(
            None,
            vec![1u8; 32],
@@ -1442,10 +1586,10 @@ mod tests {
            None,
            12,
            1200,
-            proxy_map_v4,
+            HashMap::new(),
            HashMap::new(),
            None,
-            decision,
+            NetworkDecision::default(),
            None,
            Arc::new(SecureRandom::new()),
            Arc::new(Stats::default()),
@@ -1482,7 +1626,13 @@ mod tests {
            general.me_adaptive_floor_max_warm_writers_global,
            general.hardswap,
            general.me_pool_drain_ttl_secs,
+            general.me_instadrain,
            general.me_pool_drain_threshold,
+            general.me_pool_drain_soft_evict_enabled,
+            general.me_pool_drain_soft_evict_grace_secs,
+            general.me_pool_drain_soft_evict_per_writer,
+            general.me_pool_drain_soft_evict_budget_per_core,
+            general.me_pool_drain_soft_evict_cooldown_ms,
            general.effective_me_pool_force_close_secs(),
            general.me_pool_min_fresh_ratio,
            general.me_hardswap_warmup_delay_min_ms,
@@ -1507,6 +1657,8 @@ mod tests {
            general.me_warn_rate_limit_ms,
            MeRouteNoWriterMode::default(),
            general.me_route_no_writer_wait_ms,
+            general.me_route_hybrid_max_wait_ms,
+            general.me_route_blocking_send_timeout_ms,
            general.me_route_inline_recovery_attempts,
            general.me_route_inline_recovery_wait_ms,
        )
@@ -1556,66 +1708,19 @@ mod tests {
        conn_id
    }

-    async fn insert_live_writer(pool: &Arc<MePool>, writer_id: u64, writer_dc: i32) {
-        let (tx, _writer_rx) = mpsc::channel::<WriterCommand>(8);
-        let writer = MeWriter {
-            id: writer_id,
-            addr: SocketAddr::new(
-                IpAddr::V4(Ipv4Addr::new(203, 0, 113, (writer_id as u8).saturating_add(1))),
-                4000 + writer_id as u16,
-            ),
-            source_ip: IpAddr::V4(Ipv4Addr::LOCALHOST),
-            writer_dc,
-            generation: 2,
-            contour: Arc::new(AtomicU8::new(WriterContour::Active.as_u8())),
-            created_at: Instant::now(),
-            tx: tx.clone(),
-            cancel: CancellationToken::new(),
-            degraded: Arc::new(AtomicBool::new(false)),
-            rtt_ema_ms_x10: Arc::new(AtomicU32::new(0)),
-            draining: Arc::new(AtomicBool::new(false)),
-            draining_started_at_epoch_secs: Arc::new(AtomicU64::new(0)),
-            drain_deadline_epoch_secs: Arc::new(AtomicU64::new(0)),
-            allow_drain_fallback: Arc::new(AtomicBool::new(false)),
-        };
-        pool.writers.write().await.push(writer);
-        pool.registry.register_writer(writer_id, tx).await;
-        pool.conn_count.fetch_add(1, Ordering::Relaxed);
-    }
-
    #[tokio::test]
    async fn reap_draining_writers_force_closes_oldest_over_threshold() {
        let pool = make_pool(2).await;
-        insert_live_writer(&pool, 1, 2).await;
        let now_epoch_secs = MePool::now_epoch_secs();
        let conn_a = insert_draining_writer(&pool, 10, now_epoch_secs.saturating_sub(30)).await;
        let conn_b = insert_draining_writer(&pool, 20, now_epoch_secs.saturating_sub(20)).await;
        let conn_c = insert_draining_writer(&pool, 30, now_epoch_secs.saturating_sub(10)).await;
        let mut warn_next_allowed = HashMap::new();
+        let mut soft_evict_next_allowed = HashMap::new();

-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

-        let mut writer_ids: Vec<u64> = pool.writers.read().await.iter().map(|writer| writer.id).collect();
-        writer_ids.sort_unstable();
-        assert_eq!(writer_ids, vec![1, 20, 30]);
-        assert!(pool.registry.get_writer(conn_a).await.is_none());
-        assert_eq!(pool.registry.get_writer(conn_b).await.unwrap().writer_id, 20);
-        assert_eq!(pool.registry.get_writer(conn_c).await.unwrap().writer_id, 30);
-    }
-
-    #[tokio::test]
-    async fn reap_draining_writers_force_closes_overflow_without_replacement() {
-        let pool = make_pool(2).await;
-        let now_epoch_secs = MePool::now_epoch_secs();
-        let conn_a = insert_draining_writer(&pool, 10, now_epoch_secs.saturating_sub(30)).await;
-        let conn_b = insert_draining_writer(&pool, 20, now_epoch_secs.saturating_sub(20)).await;
-        let conn_c = insert_draining_writer(&pool, 30, now_epoch_secs.saturating_sub(10)).await;
-        let mut warn_next_allowed = HashMap::new();
-
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-        let mut writer_ids: Vec<u64> = pool.writers.read().await.iter().map(|writer| writer.id).collect();
-        writer_ids.sort_unstable();
+        let writer_ids: Vec<u64> = pool.writers.read().await.iter().map(|writer| writer.id).collect();
        assert_eq!(writer_ids, vec![20, 30]);
        assert!(pool.registry.get_writer(conn_a).await.is_none());
        assert_eq!(pool.registry.get_writer(conn_b).await.unwrap().writer_id, 20);
@@ -1630,8 +1735,9 @@ mod tests {
        let conn_b = insert_draining_writer(&pool, 20, now_epoch_secs.saturating_sub(20)).await;
        let conn_c = insert_draining_writer(&pool, 30, now_epoch_secs.saturating_sub(10)).await;
        let mut warn_next_allowed = HashMap::new();
+        let mut soft_evict_next_allowed = HashMap::new();

-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

        let writer_ids: Vec<u64> = pool.writers.read().await.iter().map(|writer| writer.id).collect();
        assert_eq!(writer_ids, vec![10, 20, 30]);
@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::collections::HashSet;
 use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU32, AtomicU64, Ordering};
@@ -82,7 +81,13 @@ async fn make_pool(
        general.me_adaptive_floor_max_warm_writers_global,
        general.hardswap,
        general.me_pool_drain_ttl_secs,
+        general.me_instadrain,
        general.me_pool_drain_threshold,
+        general.me_pool_drain_soft_evict_enabled,
+        general.me_pool_drain_soft_evict_grace_secs,
+        general.me_pool_drain_soft_evict_per_writer,
+        general.me_pool_drain_soft_evict_budget_per_core,
+        general.me_pool_drain_soft_evict_cooldown_ms,
        general.effective_me_pool_force_close_secs(),
        general.me_pool_min_fresh_ratio,
        general.me_hardswap_warmup_delay_min_ms,
@@ -107,6 +112,8 @@ async fn make_pool(
        general.me_warn_rate_limit_ms,
        MeRouteNoWriterMode::default(),
        general.me_route_no_writer_wait_ms,
+        general.me_route_hybrid_max_wait_ms,
+        general.me_route_blocking_send_timeout_ms,
        general.me_route_inline_recovery_attempts,
        general.me_route_inline_recovery_wait_ms,
    );
@@ -182,48 +189,15 @@ async fn sorted_writer_ids(pool: &Arc<MePool>) -> Vec<u64> {
    ids
 }

-fn lcg_next(state: &mut u64) -> u64 {
-    *state = state.wrapping_mul(6364136223846793005).wrapping_add(1);
-    *state
-}
-
-async fn draining_writer_ids(pool: &Arc<MePool>) -> HashSet<u64> {
-    pool.writers
-        .read()
-        .await
-        .iter()
-        .filter(|writer| writer.draining.load(Ordering::Relaxed))
-        .map(|writer| writer.id)
-        .collect::<HashSet<u64>>()
-}
-
-async fn set_writer_runtime_state(
-    pool: &Arc<MePool>,
-    writer_id: u64,
-    draining: bool,
-    drain_started_at_epoch_secs: u64,
-    drain_deadline_epoch_secs: u64,
-) {
-    let writers = pool.writers.read().await;
-    if let Some(writer) = writers.iter().find(|writer| writer.id == writer_id) {
-        writer.draining.store(draining, Ordering::Relaxed);
-        writer
-            .draining_started_at_epoch_secs
-            .store(drain_started_at_epoch_secs, Ordering::Relaxed);
-        writer
-            .drain_deadline_epoch_secs
-            .store(drain_deadline_epoch_secs, Ordering::Relaxed);
-    }
-}
-
 #[tokio::test]
 async fn reap_draining_writers_clears_warn_state_when_pool_empty() {
    let (pool, _rng) = make_pool(128, 1, 1).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
    warn_next_allowed.insert(11, Instant::now() + Duration::from_secs(5));
    warn_next_allowed.insert(22, Instant::now() + Duration::from_secs(5));

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert!(warn_next_allowed.is_empty());
 }
@@ -232,13 +206,15 @@ async fn reap_draining_writers_clears_warn_state_when_pool_empty() {
 async fn reap_draining_writers_respects_threshold_across_multiple_overflow_cycles() {
    let threshold = 3u64;
    let (pool, _rng) = make_pool(threshold, 1, 1).await;
+    pool.me_pool_drain_soft_evict_enabled
+        .store(false, Ordering::Relaxed);
    let now_epoch_secs = MePool::now_epoch_secs();

    for writer_id in 1..=60u64 {
        insert_draining_writer(
            &pool,
            writer_id,
-            now_epoch_secs.saturating_sub(600).saturating_add(writer_id),
+            now_epoch_secs.saturating_sub(20),
            1,
            0,
        )
@@ -246,15 +222,16 @@ async fn reap_draining_writers_respects_threshold_across_multiple_overflow_cycle
    }

    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
    for _ in 0..64 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        if writer_count(&pool).await <= threshold as usize {
            break;
        }
    }

    assert_eq!(writer_count(&pool).await, threshold as usize);
-    assert_eq!(sorted_writer_ids(&pool).await, vec![58, 59, 60]);
+    assert_eq!(sorted_writer_ids(&pool).await, vec![1, 2, 3]);
 }

 #[tokio::test]
@@ -275,11 +252,12 @@ async fn reap_draining_writers_handles_large_empty_writer_population() {
    }

    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
    for _ in 0..24 {
        if writer_count(&pool).await == 0 {
            break;
        }
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
    }

    assert_eq!(writer_count(&pool).await, 0);
@@ -303,11 +281,12 @@ async fn reap_draining_writers_processes_mass_deadline_expiry_without_unbounded_
    }

    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
    for _ in 0..40 {
        if writer_count(&pool).await == 0 {
            break;
        }
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
    }

    assert_eq!(writer_count(&pool).await, 0);
@@ -318,6 +297,7 @@ async fn reap_draining_writers_maintains_warn_state_subset_property_under_bulk_c
    let (pool, _rng) = make_pool(128, 1, 1).await;
    let now_epoch_secs = MePool::now_epoch_secs();
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

    for wave in 0..40u64 {
        for offset in 0..8u64 {
@@ -331,7 +311,7 @@ async fn reap_draining_writers_maintains_warn_state_subset_property_under_bulk_c
            .await;
        }

-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        assert!(warn_next_allowed.len() <= writer_count(&pool).await);

        let ids = sorted_writer_ids(&pool).await;
@@ -339,7 +319,7 @@ async fn reap_draining_writers_maintains_warn_state_subset_property_under_bulk_c
            let _ = pool.remove_writer_and_close_clients(writer_id).await;
        }

-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        assert!(warn_next_allowed.len() <= writer_count(&pool).await);
    }
 }
@@ -361,9 +341,10 @@ async fn reap_draining_writers_budgeted_cleanup_never_increases_pool_size() {
    }

    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
    let mut previous = writer_count(&pool).await;
    for _ in 0..32 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        let current = writer_count(&pool).await;
        assert!(current <= previous);
        previous = current;
@@ -465,149 +446,6 @@ async fn me_health_monitor_eliminates_mixed_empty_and_deadline_backlog() {
    assert!(writer_count(&pool).await <= threshold as usize);
 }

-#[tokio::test]
-async fn reap_draining_writers_deterministic_mixed_state_churn_preserves_invariants() {
-    let threshold = 9u64;
-    let (pool, _rng) = make_pool(threshold, 1, 1).await;
-    let mut warn_next_allowed = HashMap::new();
-    let mut seed = 0x9E37_79B9_7F4A_7C15u64;
-    let mut next_writer_id = 20_000u64;
-    let now_epoch_secs = MePool::now_epoch_secs();
-
-    for writer_id in 1..=72u64 {
-        let bound_clients = if writer_id % 4 == 0 { 0 } else { 1 };
-        let deadline = if writer_id % 5 == 0 {
-            now_epoch_secs.saturating_sub(1)
-        } else {
-            0
-        };
-        insert_draining_writer(
-            &pool,
-            writer_id,
-            now_epoch_secs.saturating_sub(500).saturating_add(writer_id),
-            bound_clients,
-            deadline,
-        )
-        .await;
-    }
-
-    for _round in 0..90 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-        let draining_ids = draining_writer_ids(&pool).await;
-        assert!(
-            warn_next_allowed.keys().all(|id| draining_ids.contains(id)),
-            "warn-state keys must always be a subset of live draining writers"
-        );
-
-        let writer_ids = sorted_writer_ids(&pool).await;
-        if writer_ids.is_empty() {
-            continue;
-        }
-
-        let remove_n = (lcg_next(&mut seed) % 3) as usize;
-        for writer_id in writer_ids.iter().copied().take(remove_n) {
-            let _ = pool.remove_writer_and_close_clients(writer_id).await;
-        }
-
-        let survivors = sorted_writer_ids(&pool).await;
-        if !survivors.is_empty() {
-            let idx = (lcg_next(&mut seed) as usize) % survivors.len();
-            let target = survivors[idx];
-            set_writer_runtime_state(&pool, target, false, 0, 0).await;
-        }
-
-        let survivors = sorted_writer_ids(&pool).await;
-        if survivors.len() > 1 {
-            let idx = (lcg_next(&mut seed) as usize) % survivors.len();
-            let target = survivors[idx];
-            let expired_deadline = if lcg_next(&mut seed) & 1 == 0 {
-                now_epoch_secs.saturating_sub(1)
-            } else {
-                0
-            };
-            set_writer_runtime_state(
-                &pool,
-                target,
-                true,
-                now_epoch_secs.saturating_sub(120),
-                expired_deadline,
-            )
-            .await;
-        }
-
-        let inject_n = (lcg_next(&mut seed) % 4) as usize;
-        for _ in 0..inject_n {
-            let bound_clients = if lcg_next(&mut seed) & 1 == 0 { 0 } else { 1 };
-            let deadline = if lcg_next(&mut seed) & 1 == 0 {
-                now_epoch_secs.saturating_sub(1)
-            } else {
-                0
-            };
-            insert_draining_writer(
-                &pool,
-                next_writer_id,
-                now_epoch_secs.saturating_sub(240),
-                bound_clients,
-                deadline,
-            )
-            .await;
-            next_writer_id = next_writer_id.saturating_add(1);
-        }
-    }
-
-    for _ in 0..64 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
-        if writer_count(&pool).await <= threshold as usize {
-            break;
-        }
-    }
-
-    assert!(writer_count(&pool).await <= threshold as usize);
-    let draining_ids = draining_writer_ids(&pool).await;
-    assert!(warn_next_allowed.keys().all(|id| draining_ids.contains(id)));
-}
-
-#[tokio::test]
-async fn reap_draining_writers_repeated_draining_flips_never_leave_stale_warn_state() {
-    let (pool, _rng) = make_pool(64, 1, 1).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-
-    for writer_id in 1..=24u64 {
-        insert_draining_writer(
-            &pool,
-            writer_id,
-            now_epoch_secs.saturating_sub(240),
-            1,
-            0,
-        )
-        .await;
-    }
-
-    let mut warn_next_allowed = HashMap::new();
-    for _round in 0..48u64 {
-        for writer_id in 1..=24u64 {
-            let draining = (writer_id + _round) % 3 != 0;
-            set_writer_runtime_state(
-                &pool,
-                writer_id,
-                draining,
-                now_epoch_secs.saturating_sub(120),
-                0,
-            )
-            .await;
-        }
-
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-        let draining_ids = draining_writer_ids(&pool).await;
-        assert!(
-            warn_next_allowed.keys().all(|id| draining_ids.contains(id)),
-            "warn-state map must not retain entries for writers outside draining set"
-        );
-    }
-}
-
 #[test]
 fn health_drain_close_budget_is_within_expected_bounds() {
    let budget = health_drain_close_budget();
@@ -80,7 +80,13 @@ async fn make_pool(
        general.me_adaptive_floor_max_warm_writers_global,
        general.hardswap,
        general.me_pool_drain_ttl_secs,
+        general.me_instadrain,
        general.me_pool_drain_threshold,
+        general.me_pool_drain_soft_evict_enabled,
+        general.me_pool_drain_soft_evict_grace_secs,
+        general.me_pool_drain_soft_evict_per_writer,
+        general.me_pool_drain_soft_evict_budget_per_core,
+        general.me_pool_drain_soft_evict_cooldown_ms,
        general.effective_me_pool_force_close_secs(),
        general.me_pool_min_fresh_ratio,
        general.me_hardswap_warmup_delay_min_ms,
@@ -105,6 +111,8 @@ async fn make_pool(
        general.me_warn_rate_limit_ms,
        MeRouteNoWriterMode::default(),
        general.me_route_no_writer_wait_ms,
+        general.me_route_hybrid_max_wait_ms,
+        general.me_route_blocking_send_timeout_ms,
        general.me_route_inline_recovery_attempts,
        general.me_route_inline_recovery_wait_ms,
    );
@@ -161,20 +169,6 @@ async fn insert_draining_writer(
    }
 }

-async fn wait_for_pool_empty(pool: &Arc<MePool>, timeout: Duration) {
-    let start = Instant::now();
-    loop {
-        if pool.writers.read().await.is_empty() {
-            return;
-        }
-        assert!(
-            start.elapsed() < timeout,
-            "timed out waiting for pool.writers to become empty"
-        );
-        tokio::time::sleep(Duration::from_millis(5)).await;
-    }
-}
-
 #[tokio::test]
 async fn me_health_monitor_drains_expired_backlog_over_multiple_cycles() {
    let (pool, rng) = make_pool(128, 1, 1).await;
@@ -192,7 +186,7 @@ async fn me_health_monitor_drains_expired_backlog_over_multiple_cycles() {
    }

    let monitor = tokio::spawn(me_health_monitor(pool.clone(), rng, 0));
-    wait_for_pool_empty(&pool, Duration::from_secs(1)).await;
+    tokio::time::sleep(Duration::from_millis(60)).await;
    monitor.abort();
    let _ = monitor.await;

@@ -208,7 +202,7 @@ async fn me_health_monitor_cleans_empty_draining_writers_without_force_close() {
    }

    let monitor = tokio::spawn(me_health_monitor(pool.clone(), rng, 0));
-    wait_for_pool_empty(&pool, Duration::from_secs(1)).await;
+    tokio::time::sleep(Duration::from_millis(30)).await;
    monitor.abort();
    let _ = monitor.await;

@@ -233,7 +227,7 @@ async fn me_health_monitor_converges_retry_like_threshold_backlog_to_empty() {
    }

    let monitor = tokio::spawn(me_health_monitor(pool.clone(), rng, 0));
-    wait_for_pool_empty(&pool, Duration::from_secs(1)).await;
+    tokio::time::sleep(Duration::from_millis(60)).await;
    monitor.abort();
    let _ = monitor.await;

@@ -4,6 +4,7 @@ use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU32, AtomicU64, Ordering};
 use std::time::{Duration, Instant};

+use bytes::Bytes;
 use tokio::sync::mpsc;
 use tokio_util::sync::CancellationToken;

@@ -39,7 +40,7 @@ async fn make_pool(me_pool_drain_threshold: u64) -> Arc<MePool> {
        NetworkDecision::default(),
        None,
        Arc::new(SecureRandom::new()),
-        Arc::new(Stats::default()),
+        Arc::new(Stats::new()),
        general.me_keepalive_enabled,
        general.me_keepalive_interval_secs,
        general.me_keepalive_jitter_secs,
@@ -73,7 +74,13 @@ async fn make_pool(me_pool_drain_threshold: u64) -> Arc<MePool> {
        general.me_adaptive_floor_max_warm_writers_global,
        general.hardswap,
        general.me_pool_drain_ttl_secs,
+        general.me_instadrain,
        general.me_pool_drain_threshold,
+        general.me_pool_drain_soft_evict_enabled,
+        general.me_pool_drain_soft_evict_grace_secs,
+        general.me_pool_drain_soft_evict_per_writer,
+        general.me_pool_drain_soft_evict_budget_per_core,
+        general.me_pool_drain_soft_evict_cooldown_ms,
        general.effective_me_pool_force_close_secs(),
        general.me_pool_min_fresh_ratio,
        general.me_hardswap_warmup_delay_min_ms,
@@ -98,6 +105,8 @@ async fn make_pool(me_pool_drain_threshold: u64) -> Arc<MePool> {
        general.me_warn_rate_limit_ms,
        MeRouteNoWriterMode::default(),
        general.me_route_no_writer_wait_ms,
+        general.me_route_hybrid_max_wait_ms,
+        general.me_route_blocking_send_timeout_ms,
        general.me_route_inline_recovery_attempts,
        general.me_route_inline_recovery_wait_ms,
    )
@@ -168,36 +177,28 @@ async fn current_writer_ids(pool: &Arc<MePool>) -> Vec<u64> {
    writer_ids
 }

-async fn writer_exists(pool: &Arc<MePool>, writer_id: u64) -> bool {
-    pool.writers
-        .read()
-        .await
-        .iter()
-        .any(|writer| writer.id == writer_id)
-}
-
-async fn set_writer_draining(pool: &Arc<MePool>, writer_id: u64, draining: bool) {
-    let writers = pool.writers.read().await;
-    if let Some(writer) = writers.iter().find(|writer| writer.id == writer_id) {
-        writer.draining.store(draining, Ordering::Relaxed);
-    }
-}
-
 #[tokio::test]
 async fn reap_draining_writers_drops_warn_state_for_removed_writer() {
    let pool = make_pool(128).await;
    let now_epoch_secs = MePool::now_epoch_secs();
-    let conn_ids =
-        insert_draining_writer(&pool, 7, now_epoch_secs.saturating_sub(180), 1, 0).await;
+    let conn_ids = insert_draining_writer(
+        &pool,
+        7,
+        now_epoch_secs.saturating_sub(180),
+        1,
+        now_epoch_secs.saturating_add(3_600),
+    )
+    .await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
    assert!(warn_next_allowed.contains_key(&7));

    let _ = pool.remove_writer_and_close_clients(7).await;
    assert!(pool.registry.get_writer(conn_ids[0]).await.is_none());

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
    assert!(!warn_next_allowed.contains_key(&7));
 }

@@ -209,12 +210,96 @@ async fn reap_draining_writers_removes_empty_draining_writers() {
    insert_draining_writer(&pool, 2, now_epoch_secs.saturating_sub(30), 0, 0).await;
    insert_draining_writer(&pool, 3, now_epoch_secs.saturating_sub(20), 1, 0).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert_eq!(current_writer_ids(&pool).await, vec![3]);
 }

+#[tokio::test]
+async fn reap_draining_writers_does_not_block_on_stuck_writer_close_signal() {
+    let pool = make_pool(128).await;
+    let now_epoch_secs = MePool::now_epoch_secs();
+
+    let (blocked_tx, blocked_rx) = mpsc::channel::<WriterCommand>(1);
+    assert!(
+        blocked_tx
+            .try_send(WriterCommand::Data(Bytes::from_static(b"stuck")))
+            .is_ok()
+    );
+    let blocked_rx_guard = tokio::spawn(async move {
+        let _hold_rx = blocked_rx;
+        tokio::time::sleep(Duration::from_secs(30)).await;
+    });
+
+    let blocked_writer_id = 90u64;
+    let blocked_writer = MeWriter {
+        id: blocked_writer_id,
+        addr: SocketAddr::new(
+            IpAddr::V4(Ipv4Addr::LOCALHOST),
+            4500 + blocked_writer_id as u16,
+        ),
+        source_ip: IpAddr::V4(Ipv4Addr::LOCALHOST),
+        writer_dc: 2,
+        generation: 1,
+        contour: Arc::new(AtomicU8::new(WriterContour::Draining.as_u8())),
+        created_at: Instant::now() - Duration::from_secs(blocked_writer_id),
+        tx: blocked_tx.clone(),
+        cancel: CancellationToken::new(),
+        degraded: Arc::new(AtomicBool::new(false)),
+        rtt_ema_ms_x10: Arc::new(AtomicU32::new(0)),
+        draining: Arc::new(AtomicBool::new(true)),
+        draining_started_at_epoch_secs: Arc::new(AtomicU64::new(
+            now_epoch_secs.saturating_sub(120),
+        )),
+        drain_deadline_epoch_secs: Arc::new(AtomicU64::new(0)),
+        allow_drain_fallback: Arc::new(AtomicBool::new(false)),
+    };
+    pool.writers.write().await.push(blocked_writer);
+    pool.registry
+        .register_writer(blocked_writer_id, blocked_tx)
+        .await;
+    pool.conn_count.fetch_add(1, Ordering::Relaxed);
+
+    insert_draining_writer(&pool, 91, now_epoch_secs.saturating_sub(110), 0, 0).await;
+
+    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
+
+    let reap_res = tokio::time::timeout(
+        Duration::from_millis(500),
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed),
+    )
+    .await;
+    blocked_rx_guard.abort();
+
+    assert!(reap_res.is_ok(), "reap should not block on close signal");
+    assert!(current_writer_ids(&pool).await.is_empty());
+    assert_eq!(pool.stats.get_me_writer_close_signal_drop_total(), 2);
+    assert_eq!(pool.stats.get_me_writer_close_signal_channel_full_total(), 1);
+    assert_eq!(pool.stats.get_me_draining_writers_reap_progress_total(), 2);
+    let activity = pool.registry.writer_activity_snapshot().await;
+    assert!(!activity.bound_clients_by_writer.contains_key(&blocked_writer_id));
+    assert!(!activity.bound_clients_by_writer.contains_key(&91));
+    let (probe_conn_id, _rx) = pool.registry.register().await;
+    assert!(
+        !pool.registry
+            .bind_writer(
+                probe_conn_id,
+                blocked_writer_id,
+                ConnMeta {
+                    target_dc: 2,
+                    client_addr: SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 6400),
+                    our_addr: SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443),
+                    proto_flags: 0,
+                },
+            )
+            .await
+    );
+    let _ = pool.registry.unregister(probe_conn_id).await;
+}
+
 #[tokio::test]
 async fn reap_draining_writers_overflow_closes_oldest_non_empty_writers() {
    let pool = make_pool(2).await;
@@ -224,8 +309,9 @@ async fn reap_draining_writers_overflow_closes_oldest_non_empty_writers() {
    insert_draining_writer(&pool, 33, now_epoch_secs.saturating_sub(20), 1, 0).await;
    insert_draining_writer(&pool, 44, now_epoch_secs.saturating_sub(10), 1, 0).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert_eq!(current_writer_ids(&pool).await, vec![33, 44]);
 }
@@ -243,150 +329,35 @@ async fn reap_draining_writers_deadline_force_close_applies_under_threshold() {
    )
    .await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert!(current_writer_ids(&pool).await.is_empty());
 }

 #[tokio::test]
 async fn reap_draining_writers_limits_closes_per_health_tick() {
-    let pool = make_pool(128).await;
+    let pool = make_pool(1).await;
    let now_epoch_secs = MePool::now_epoch_secs();
    let close_budget = health_drain_close_budget();
-    let writer_total = close_budget.saturating_add(19);
+    let writer_total = close_budget.saturating_add(20);
    for writer_id in 1..=writer_total as u64 {
        insert_draining_writer(
            &pool,
            writer_id,
            now_epoch_secs.saturating_sub(20),
            1,
-            now_epoch_secs.saturating_sub(1),
-        )
-        .await;
-    }
-    let mut warn_next_allowed = HashMap::new();
-
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-    assert_eq!(pool.writers.read().await.len(), writer_total - close_budget);
-}
-
-#[tokio::test]
-async fn reap_draining_writers_keeps_warn_state_for_deadline_backlog_writers() {
-    let pool = make_pool(0).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-    let close_budget = health_drain_close_budget();
-    let writer_total = close_budget.saturating_add(5);
-    for writer_id in 1..=writer_total as u64 {
-        insert_draining_writer(
-            &pool,
-            writer_id,
-            now_epoch_secs.saturating_sub(60),
-            1,
-            now_epoch_secs.saturating_sub(1),
-        )
-        .await;
-    }
-    let target_writer_id = writer_total as u64;
-    let mut warn_next_allowed = HashMap::new();
-    warn_next_allowed.insert(
-        target_writer_id,
-        Instant::now() + Duration::from_secs(300),
-    );
-
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-    assert!(writer_exists(&pool, target_writer_id).await);
-    assert!(warn_next_allowed.contains_key(&target_writer_id));
-}
-
-#[tokio::test]
-async fn reap_draining_writers_keeps_warn_state_for_overflow_backlog_writers() {
-    let pool = make_pool(1).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-    let close_budget = health_drain_close_budget();
-    let writer_total = close_budget.saturating_add(6);
-    for writer_id in 1..=writer_total as u64 {
-        insert_draining_writer(
-            &pool,
-            writer_id,
-            now_epoch_secs.saturating_sub(300).saturating_add(writer_id),
-            1,
            0,
        )
        .await;
    }
-    let target_writer_id = writer_total.saturating_sub(1) as u64;
    let mut warn_next_allowed = HashMap::new();
-    warn_next_allowed.insert(
-        target_writer_id,
-        Instant::now() + Duration::from_secs(300),
-    );
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

-    assert!(writer_exists(&pool, target_writer_id).await);
-    assert!(warn_next_allowed.contains_key(&target_writer_id));
-}
-
-#[tokio::test]
-async fn reap_draining_writers_drops_warn_state_when_writer_exits_draining_state() {
-    let pool = make_pool(128).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-    insert_draining_writer(&pool, 71, now_epoch_secs.saturating_sub(60), 1, 0).await;
-
-    let mut warn_next_allowed = HashMap::new();
-    warn_next_allowed.insert(71, Instant::now() + Duration::from_secs(300));
-
-    set_writer_draining(&pool, 71, false).await;
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-
-    assert!(writer_exists(&pool, 71).await);
-    assert!(
-        !warn_next_allowed.contains_key(&71),
-        "warn cooldown state must be dropped after writer leaves draining state"
-    );
-}
-
-#[tokio::test]
-async fn reap_draining_writers_preserves_warn_state_across_multiple_budget_deferrals() {
-    let pool = make_pool(0).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-    let close_budget = health_drain_close_budget();
-    let writer_total = close_budget.saturating_mul(2).saturating_add(1);
-    for writer_id in 1..=writer_total as u64 {
-        insert_draining_writer(
-            &pool,
-            writer_id,
-            now_epoch_secs.saturating_sub(120),
-            1,
-            now_epoch_secs.saturating_sub(1),
-        )
-        .await;
-    }
-
-    let tail_writer_id = writer_total as u64;
-    let mut warn_next_allowed = HashMap::new();
-    warn_next_allowed.insert(
-        tail_writer_id,
-        Instant::now() + Duration::from_secs(300),
-    );
-
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-    assert!(writer_exists(&pool, tail_writer_id).await);
-    assert!(warn_next_allowed.contains_key(&tail_writer_id));
-
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-    assert!(writer_exists(&pool, tail_writer_id).await);
-    assert!(warn_next_allowed.contains_key(&tail_writer_id));
-
-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
-    assert!(!writer_exists(&pool, tail_writer_id).await);
-    assert!(
-        !warn_next_allowed.contains_key(&tail_writer_id),
-        "warn cooldown state must clear once writer is actually removed"
-    );
+    assert_eq!(pool.writers.read().await.len(), writer_total - close_budget);
 }

 #[tokio::test]
@@ -400,18 +371,19 @@ async fn reap_draining_writers_backlog_drains_across_ticks() {
            &pool,
            writer_id,
            now_epoch_secs.saturating_sub(20),
-            1,
-            now_epoch_secs.saturating_sub(1),
+            0,
+            0,
        )
        .await;
    }
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

    for _ in 0..8 {
        if pool.writers.read().await.is_empty() {
            break;
        }
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
    }

    assert!(pool.writers.read().await.is_empty());
@@ -428,16 +400,17 @@ async fn reap_draining_writers_threshold_backlog_converges_to_threshold() {
        insert_draining_writer(
            &pool,
            writer_id,
-            now_epoch_secs.saturating_sub(200).saturating_add(writer_id),
+            now_epoch_secs.saturating_sub(20),
            1,
            0,
        )
        .await;
    }
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

    for _ in 0..16 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        if pool.writers.read().await.len() <= threshold as usize {
            break;
        }
@@ -454,34 +427,36 @@ async fn reap_draining_writers_threshold_zero_preserves_non_expired_non_empty_wr
    insert_draining_writer(&pool, 20, now_epoch_secs.saturating_sub(30), 1, 0).await;
    insert_draining_writer(&pool, 30, now_epoch_secs.saturating_sub(20), 1, 0).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert_eq!(current_writer_ids(&pool).await, vec![10, 20, 30]);
 }

 #[tokio::test]
 async fn reap_draining_writers_prioritizes_force_close_before_empty_cleanup() {
-    let pool = make_pool(128).await;
+    let pool = make_pool(1).await;
    let now_epoch_secs = MePool::now_epoch_secs();
    let close_budget = health_drain_close_budget();
-    for writer_id in 1..=close_budget as u64 {
+    for writer_id in 1..=close_budget.saturating_add(1) as u64 {
        insert_draining_writer(
            &pool,
            writer_id,
            now_epoch_secs.saturating_sub(20),
            1,
-            now_epoch_secs.saturating_sub(1),
+            0,
        )
        .await;
    }
-    let empty_writer_id = close_budget as u64 + 1;
+    let empty_writer_id = close_budget.saturating_add(2) as u64;
    insert_draining_writer(&pool, empty_writer_id, now_epoch_secs.saturating_sub(20), 0, 0).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

-    assert_eq!(current_writer_ids(&pool).await, vec![empty_writer_id]);
+    assert_eq!(current_writer_ids(&pool).await, vec![1, empty_writer_id]);
 }

 #[tokio::test]
@@ -491,8 +466,9 @@ async fn reap_draining_writers_empty_cleanup_does_not_increment_force_close_metr
    insert_draining_writer(&pool, 1, now_epoch_secs.saturating_sub(60), 0, 0).await;
    insert_draining_writer(&pool, 2, now_epoch_secs.saturating_sub(50), 0, 0).await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert!(current_writer_ids(&pool).await.is_empty());
    assert_eq!(pool.stats.get_pool_force_close_total(), 0);
@@ -519,8 +495,9 @@ async fn reap_draining_writers_handles_duplicate_force_close_requests_for_same_w
    )
    .await;
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

-    reap_draining_writers(&pool, &mut warn_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;

    assert!(current_writer_ids(&pool).await.is_empty());
 }
@@ -530,6 +507,7 @@ async fn reap_draining_writers_warn_state_never_exceeds_live_draining_population
    let pool = make_pool(128).await;
    let now_epoch_secs = MePool::now_epoch_secs();
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

    for wave in 0..12u64 {
        for offset in 0..9u64 {
@@ -542,14 +520,14 @@ async fn reap_draining_writers_warn_state_never_exceeds_live_draining_population
            )
            .await;
        }
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        assert!(warn_next_allowed.len() <= pool.writers.read().await.len());

        let existing_writer_ids = current_writer_ids(&pool).await;
        for writer_id in existing_writer_ids.into_iter().take(4) {
            let _ = pool.remove_writer_and_close_clients(writer_id).await;
        }
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        assert!(warn_next_allowed.len() <= pool.writers.read().await.len());
    }
 }
@@ -559,6 +537,7 @@ async fn reap_draining_writers_mixed_backlog_converges_without_leaking_warn_stat
    let pool = make_pool(6).await;
    let now_epoch_secs = MePool::now_epoch_secs();
    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();

    for writer_id in 1..=18u64 {
        let bound_clients = if writer_id % 3 == 0 { 0 } else { 1 };
@@ -578,7 +557,7 @@ async fn reap_draining_writers_mixed_backlog_converges_without_leaking_warn_stat
    }

    for _ in 0..16 {
-        reap_draining_writers(&pool, &mut warn_next_allowed).await;
+        reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
        if pool.writers.read().await.len() <= 6 {
            break;
        }
@@ -588,71 +567,89 @@ async fn reap_draining_writers_mixed_backlog_converges_without_leaking_warn_stat
    assert!(warn_next_allowed.len() <= pool.writers.read().await.len());
 }

+#[tokio::test]
+async fn reap_draining_writers_soft_evicts_stuck_writer_with_per_writer_cap() {
+    let pool = make_pool(128).await;
+    pool.me_pool_drain_soft_evict_enabled.store(true, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_grace_secs.store(0, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_per_writer.store(1, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_budget_per_core.store(8, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_cooldown_ms
+        .store(1, Ordering::Relaxed);
+
+    let now_epoch_secs = MePool::now_epoch_secs();
+    insert_draining_writer(
+        &pool,
+        77,
+        now_epoch_secs.saturating_sub(240),
+        3,
+        now_epoch_secs.saturating_add(3_600),
+    )
+    .await;
+    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
+
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
+
+    let activity = pool.registry.writer_activity_snapshot().await;
+    assert_eq!(activity.bound_clients_by_writer.get(&77), Some(&2));
+    assert_eq!(pool.stats.get_pool_drain_soft_evict_total(), 1);
+    assert_eq!(pool.stats.get_pool_drain_soft_evict_writer_total(), 1);
+    assert_eq!(current_writer_ids(&pool).await, vec![77]);
+}
+
+#[tokio::test]
+async fn reap_draining_writers_soft_evict_respects_cooldown_per_writer() {
+    let pool = make_pool(128).await;
+    pool.me_pool_drain_soft_evict_enabled.store(true, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_grace_secs.store(0, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_per_writer.store(1, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_budget_per_core.store(8, Ordering::Relaxed);
+    pool.me_pool_drain_soft_evict_cooldown_ms
+        .store(60_000, Ordering::Relaxed);
+
+    let now_epoch_secs = MePool::now_epoch_secs();
+    insert_draining_writer(
+        &pool,
+        88,
+        now_epoch_secs.saturating_sub(240),
+        3,
+        now_epoch_secs.saturating_add(3_600),
+    )
+    .await;
+    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
+
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
+
+    let activity = pool.registry.writer_activity_snapshot().await;
+    assert_eq!(activity.bound_clients_by_writer.get(&88), Some(&2));
+    assert_eq!(pool.stats.get_pool_drain_soft_evict_total(), 1);
+    assert_eq!(pool.stats.get_pool_drain_soft_evict_writer_total(), 1);
+}
+
+#[tokio::test]
+async fn reap_draining_writers_instadrain_removes_non_expired_writers_immediately() {
+    let pool = make_pool(0).await;
+    pool.me_instadrain.store(true, Ordering::Relaxed);
+    let now_epoch_secs = MePool::now_epoch_secs();
+    insert_draining_writer(&pool, 101, now_epoch_secs.saturating_sub(5), 1, 0).await;
+    insert_draining_writer(&pool, 102, now_epoch_secs.saturating_sub(4), 1, 0).await;
+    let mut warn_next_allowed = HashMap::new();
+    let mut soft_evict_next_allowed = HashMap::new();
+
+    reap_draining_writers(&pool, &mut warn_next_allowed, &mut soft_evict_next_allowed).await;
+
+    assert!(current_writer_ids(&pool).await.is_empty());
+}
+
 #[test]
 fn general_config_default_drain_threshold_remains_enabled() {
    assert_eq!(GeneralConfig::default().me_pool_drain_threshold, 128);
-}
-
-#[tokio::test]
-async fn reap_draining_writers_does_not_close_writer_that_became_non_empty_after_snapshot() {
-    let pool = make_pool(128).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-
-    let empty_writer_id = 700u64;
-    insert_draining_writer(
-        &pool,
-        empty_writer_id,
-        now_epoch_secs.saturating_sub(60),
-        0,
-        0,
-    )
-    .await;
-
-    let stale_empty_snapshot = vec![empty_writer_id];
-    let (rebound_conn_id, _rx) = pool.registry.register().await;
-    assert!(
-        pool.registry
-            .bind_writer(
-                rebound_conn_id,
-                empty_writer_id,
-                ConnMeta {
-                    target_dc: 2,
-                    client_addr: SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 9050),
-                    our_addr: SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443),
-                    proto_flags: 0,
-                },
-            )
-            .await,
-        "writer should accept a new bind after stale empty snapshot"
-    );
-
-    for writer_id in stale_empty_snapshot {
-        assert!(
-            !pool.remove_writer_if_empty(writer_id).await,
-            "atomic empty cleanup must reject writers that gained bound clients"
-        );
-    }
-
-    assert!(
-        writer_exists(&pool, empty_writer_id).await,
-        "empty-path cleanup must not remove a writer that gained a bound client"
-    );
+    assert!(GeneralConfig::default().me_pool_drain_soft_evict_enabled);
    assert_eq!(
-        pool.registry.get_writer(rebound_conn_id).await.map(|w| w.writer_id),
-        Some(empty_writer_id)
+        GeneralConfig::default().me_pool_drain_soft_evict_per_writer,
+        1
    );
-
-    let _ = pool.registry.unregister(rebound_conn_id).await;
-}
-
-#[tokio::test]
-async fn prune_closed_writers_closes_bound_clients_when_writer_is_non_empty() {
-    let pool = make_pool(128).await;
-    let now_epoch_secs = MePool::now_epoch_secs();
-    let conn_ids = insert_draining_writer(&pool, 910, now_epoch_secs.saturating_sub(60), 1, 0).await;
-
-    pool.prune_closed_writers().await;
-
-    assert!(!writer_exists(&pool, 910).await);
-    assert!(pool.registry.get_writer(conn_ids[0]).await.is_none());
 }
@@ -27,12 +27,10 @@ mod health_regression_tests;
 mod health_integration_tests;
 #[cfg(test)]
 mod health_adversarial_tests;
-#[cfg(test)]
-mod send_adversarial_tests;

 use bytes::Bytes;

-pub use health::me_health_monitor;
+pub use health::{me_drain_timeout_enforcer, me_health_monitor};
 #[allow(unused_imports)]
 pub use ping::{run_me_ping, format_sample_line, format_me_route, MePingReport, MePingSample, MePingFamily};
 pub use pool::MePool;
@@ -160,7 +160,6 @@ pub struct MePool {
    pub(super) refill_inflight: Arc<Mutex<HashSet<RefillEndpointKey>>>,
    pub(super) refill_inflight_dc: Arc<Mutex<HashSet<RefillDcKey>>>,
    pub(super) conn_count: AtomicUsize,
-    pub(super) draining_active_runtime: AtomicU64,
    pub(super) stats: Arc<crate::stats::Stats>,
    pub(super) generation: AtomicU64,
    pub(super) active_generation: AtomicU64,
@@ -172,7 +171,13 @@ pub struct MePool {
    pub(super) endpoint_quarantine: Arc<Mutex<HashMap<SocketAddr, Instant>>>,
    pub(super) kdf_material_fingerprint: Arc<RwLock<HashMap<SocketAddr, (u64, u16)>>>,
    pub(super) me_pool_drain_ttl_secs: AtomicU64,
+    pub(super) me_instadrain: AtomicBool,
    pub(super) me_pool_drain_threshold: AtomicU64,
+    pub(super) me_pool_drain_soft_evict_enabled: AtomicBool,
+    pub(super) me_pool_drain_soft_evict_grace_secs: AtomicU64,
+    pub(super) me_pool_drain_soft_evict_per_writer: AtomicU8,
+    pub(super) me_pool_drain_soft_evict_budget_per_core: AtomicU32,
+    pub(super) me_pool_drain_soft_evict_cooldown_ms: AtomicU64,
    pub(super) me_pool_force_close_secs: AtomicU64,
    pub(super) me_pool_min_fresh_ratio_permille: AtomicU32,
    pub(super) me_hardswap_warmup_delay_min_ms: AtomicU64,
@@ -189,6 +194,8 @@ pub struct MePool {
    pub(super) me_reader_route_data_wait_ms: Arc<AtomicU64>,
    pub(super) me_route_no_writer_mode: AtomicU8,
    pub(super) me_route_no_writer_wait: Duration,
+    pub(super) me_route_hybrid_max_wait: Duration,
+    pub(super) me_route_blocking_send_timeout: Duration,
    pub(super) me_route_inline_recovery_attempts: u32,
    pub(super) me_route_inline_recovery_wait: Duration,
    pub(super) me_health_interval_ms_unhealthy: AtomicU64,
@@ -273,7 +280,13 @@ impl MePool {
        me_adaptive_floor_max_warm_writers_global: u32,
        hardswap: bool,
        me_pool_drain_ttl_secs: u64,
+        me_instadrain: bool,
        me_pool_drain_threshold: u64,
+        me_pool_drain_soft_evict_enabled: bool,
+        me_pool_drain_soft_evict_grace_secs: u64,
+        me_pool_drain_soft_evict_per_writer: u8,
+        me_pool_drain_soft_evict_budget_per_core: u16,
+        me_pool_drain_soft_evict_cooldown_ms: u64,
        me_pool_force_close_secs: u64,
        me_pool_min_fresh_ratio: f32,
        me_hardswap_warmup_delay_min_ms: u64,
@@ -298,6 +311,8 @@ impl MePool {
        me_warn_rate_limit_ms: u64,
        me_route_no_writer_mode: MeRouteNoWriterMode,
        me_route_no_writer_wait_ms: u64,
+        me_route_hybrid_max_wait_ms: u64,
+        me_route_blocking_send_timeout_ms: u64,
        me_route_inline_recovery_attempts: u32,
        me_route_inline_recovery_wait_ms: u64,
    ) -> Arc<Self> {
@@ -439,7 +454,6 @@ impl MePool {
            refill_inflight: Arc::new(Mutex::new(HashSet::new())),
            refill_inflight_dc: Arc::new(Mutex::new(HashSet::new())),
            conn_count: AtomicUsize::new(0),
-            draining_active_runtime: AtomicU64::new(0),
            generation: AtomicU64::new(1),
            active_generation: AtomicU64::new(1),
            warm_generation: AtomicU64::new(0),
@@ -450,7 +464,19 @@ impl MePool {
            endpoint_quarantine: Arc::new(Mutex::new(HashMap::new())),
            kdf_material_fingerprint: Arc::new(RwLock::new(HashMap::new())),
            me_pool_drain_ttl_secs: AtomicU64::new(me_pool_drain_ttl_secs),
+            me_instadrain: AtomicBool::new(me_instadrain),
            me_pool_drain_threshold: AtomicU64::new(me_pool_drain_threshold),
+            me_pool_drain_soft_evict_enabled: AtomicBool::new(me_pool_drain_soft_evict_enabled),
+            me_pool_drain_soft_evict_grace_secs: AtomicU64::new(me_pool_drain_soft_evict_grace_secs),
+            me_pool_drain_soft_evict_per_writer: AtomicU8::new(
+                me_pool_drain_soft_evict_per_writer.max(1),
+            ),
+            me_pool_drain_soft_evict_budget_per_core: AtomicU32::new(
+                me_pool_drain_soft_evict_budget_per_core.max(1) as u32,
+            ),
+            me_pool_drain_soft_evict_cooldown_ms: AtomicU64::new(
+                me_pool_drain_soft_evict_cooldown_ms.max(1),
+            ),
            me_pool_force_close_secs: AtomicU64::new(me_pool_force_close_secs),
            me_pool_min_fresh_ratio_permille: AtomicU32::new(Self::ratio_to_permille(
                me_pool_min_fresh_ratio,
@@ -471,6 +497,10 @@ impl MePool {
            me_reader_route_data_wait_ms: Arc::new(AtomicU64::new(me_reader_route_data_wait_ms)),
            me_route_no_writer_mode: AtomicU8::new(me_route_no_writer_mode.as_u8()),
            me_route_no_writer_wait: Duration::from_millis(me_route_no_writer_wait_ms),
+            me_route_hybrid_max_wait: Duration::from_millis(me_route_hybrid_max_wait_ms),
+            me_route_blocking_send_timeout: Duration::from_millis(
+                me_route_blocking_send_timeout_ms,
+            ),
            me_route_inline_recovery_attempts,
            me_route_inline_recovery_wait: Duration::from_millis(me_route_inline_recovery_wait_ms),
            me_health_interval_ms_unhealthy: AtomicU64::new(me_health_interval_ms_unhealthy.max(1)),
@@ -497,7 +527,13 @@ impl MePool {
        &self,
        hardswap: bool,
        drain_ttl_secs: u64,
+        instadrain: bool,
        pool_drain_threshold: u64,
+        pool_drain_soft_evict_enabled: bool,
+        pool_drain_soft_evict_grace_secs: u64,
+        pool_drain_soft_evict_per_writer: u8,
+        pool_drain_soft_evict_budget_per_core: u16,
+        pool_drain_soft_evict_cooldown_ms: u64,
        force_close_secs: u64,
        min_fresh_ratio: f32,
        hardswap_warmup_delay_min_ms: u64,
@@ -536,8 +572,21 @@ impl MePool {
        self.hardswap.store(hardswap, Ordering::Relaxed);
        self.me_pool_drain_ttl_secs
            .store(drain_ttl_secs, Ordering::Relaxed);
+        self.me_instadrain.store(instadrain, Ordering::Relaxed);
        self.me_pool_drain_threshold
            .store(pool_drain_threshold, Ordering::Relaxed);
+        self.me_pool_drain_soft_evict_enabled
+            .store(pool_drain_soft_evict_enabled, Ordering::Relaxed);
+        self.me_pool_drain_soft_evict_grace_secs
+            .store(pool_drain_soft_evict_grace_secs, Ordering::Relaxed);
+        self.me_pool_drain_soft_evict_per_writer
+            .store(pool_drain_soft_evict_per_writer.max(1), Ordering::Relaxed);
+        self.me_pool_drain_soft_evict_budget_per_core.store(
+            pool_drain_soft_evict_budget_per_core.max(1) as u32,
+            Ordering::Relaxed,
+        );
+        self.me_pool_drain_soft_evict_cooldown_ms
+            .store(pool_drain_soft_evict_cooldown_ms.max(1), Ordering::Relaxed);
        self.me_pool_force_close_secs
            .store(force_close_secs, Ordering::Relaxed);
        self.me_pool_min_fresh_ratio_permille
@@ -692,31 +741,34 @@ impl MePool {
        }
    }

-    #[allow(dead_code)]
-    pub(super) fn draining_active_runtime(&self) -> u64 {
-        self.draining_active_runtime.load(Ordering::Relaxed)
+    pub(super) fn drain_soft_evict_enabled(&self) -> bool {
+        self.me_pool_drain_soft_evict_enabled
+            .load(Ordering::Relaxed)
    }

-    pub(super) fn increment_draining_active_runtime(&self) {
-        self.draining_active_runtime.fetch_add(1, Ordering::Relaxed);
+    pub(super) fn drain_soft_evict_grace_secs(&self) -> u64 {
+        self.me_pool_drain_soft_evict_grace_secs
+            .load(Ordering::Relaxed)
    }

-    pub(super) fn decrement_draining_active_runtime(&self) {
-        let mut current = self.draining_active_runtime.load(Ordering::Relaxed);
-        loop {
-            if current == 0 {
-                break;
-            }
-            match self.draining_active_runtime.compare_exchange_weak(
-                current,
-                current - 1,
-                Ordering::Relaxed,
-                Ordering::Relaxed,
-            ) {
-                Ok(_) => break,
-                Err(actual) => current = actual,
-            }
-        }
+    pub(super) fn drain_soft_evict_per_writer(&self) -> usize {
+        self.me_pool_drain_soft_evict_per_writer
+            .load(Ordering::Relaxed)
+            .max(1) as usize
+    }
+
+    pub(super) fn drain_soft_evict_budget_per_core(&self) -> usize {
+        self.me_pool_drain_soft_evict_budget_per_core
+            .load(Ordering::Relaxed)
+            .max(1) as usize
+    }
+
+    pub(super) fn drain_soft_evict_cooldown(&self) -> Duration {
+        Duration::from_millis(
+            self.me_pool_drain_soft_evict_cooldown_ms
+                .load(Ordering::Relaxed)
+                .max(1),
+        )
    }

    pub(super) async fn key_selector(&self) -> u32 {
@@ -70,10 +70,12 @@ impl MePool {

        let mut missing_dc = Vec::<i32>::new();
        let mut covered = 0usize;
+        let mut total = 0usize;
        for (dc, endpoints) in desired_by_dc {
            if endpoints.is_empty() {
                continue;
            }
+            total += 1;
            if endpoints
                .iter()
                .any(|addr| active_writer_addrs.contains(&(*dc, *addr)))
@@ -85,7 +87,9 @@ impl MePool {
        }

        missing_dc.sort_unstable();
-        let total = desired_by_dc.len().max(1);
+        if total == 0 {
+            return (1.0, missing_dc);
+        }
        let ratio = (covered as f32) / (total as f32);
        (ratio, missing_dc)
    }
@@ -141,38 +145,6 @@ impl MePool {
        out
    }

-    pub(super) async fn has_non_draining_writer_per_desired_dc_group(&self) -> bool {
-        let desired_by_dc = self.desired_dc_endpoints().await;
-        let required_dcs: HashSet<i32> = desired_by_dc
-            .iter()
-            .filter_map(|(dc, endpoints)| {
-                if endpoints.is_empty() {
-                    None
-                } else {
-                    Some(*dc)
-                }
-            })
-            .collect();
-        if required_dcs.is_empty() {
-            return true;
-        }
-
-        let ws = self.writers.read().await;
-        let mut covered_dcs = HashSet::<i32>::with_capacity(required_dcs.len());
-        for writer in ws.iter() {
-            if writer.draining.load(Ordering::Relaxed) {
-                continue;
-            }
-            if required_dcs.contains(&writer.writer_dc) {
-                covered_dcs.insert(writer.writer_dc);
-                if covered_dcs.len() == required_dcs.len() {
-                    return true;
-                }
-            }
-        }
-        false
-    }
-
    fn hardswap_warmup_connect_delay_ms(&self) -> u64 {
        let min_ms = self.me_hardswap_warmup_delay_min_ms.load(Ordering::Relaxed);
        let max_ms = self.me_hardswap_warmup_delay_max_ms.load(Ordering::Relaxed);
@@ -431,29 +403,21 @@ impl MePool {
        }

        if hardswap {
-            let mut fresh_missing_dc = Vec::<(i32, usize, usize)>::new();
-            for (dc, endpoints) in &desired_by_dc {
-                if endpoints.is_empty() {
-                    continue;
-                }
-                let required = self.required_writers_for_dc(endpoints.len());
-                let fresh_count = writers
-                    .iter()
-                    .filter(|w| !w.draining.load(Ordering::Relaxed))
-                    .filter(|w| w.generation == generation)
-                    .filter(|w| w.writer_dc == *dc)
-                    .filter(|w| endpoints.contains(&w.addr))
-                    .count();
-                if fresh_count < required {
-                    fresh_missing_dc.push((*dc, fresh_count, required));
-                }
-            }
+            let fresh_writer_addrs: HashSet<(i32, SocketAddr)> = writers
+                .iter()
+                .filter(|w| !w.draining.load(Ordering::Relaxed))
+                .filter(|w| w.generation == generation)
+                .map(|w| (w.writer_dc, w.addr))
+                .collect();
+            let (fresh_coverage_ratio, fresh_missing_dc) =
+                Self::coverage_ratio(&desired_by_dc, &fresh_writer_addrs);
            if !fresh_missing_dc.is_empty() {
                warn!(
                    previous_generation,
                    generation,
+                    fresh_coverage_ratio = format_args!("{fresh_coverage_ratio:.3}"),
                    missing_dc = ?fresh_missing_dc,
-                    "ME hardswap pending: fresh generation coverage incomplete"
+                    "ME hardswap pending: fresh generation DC coverage incomplete"
                );
                return;
            }
@@ -507,30 +471,12 @@ impl MePool {
            coverage_ratio = format_args!("{coverage_ratio:.3}"),
            min_ratio = format_args!("{min_ratio:.3}"),
            drain_timeout_secs,
-            "ME reinit cycle covered; processing stale writers"
+            "ME reinit cycle covered; draining stale writers"
        );
        self.stats.increment_pool_swap_total();
-        let can_drop_with_replacement = self
-            .has_non_draining_writer_per_desired_dc_group()
-            .await;
-        if can_drop_with_replacement {
-            info!(
-                stale_writers = stale_writer_ids.len(),
-                "ME reinit stale writers: replacement coverage ready, force-closing clients for fast rebind"
-            );
-        } else {
-            warn!(
-                stale_writers = stale_writer_ids.len(),
-                "ME reinit stale writers: replacement coverage incomplete, keeping draining fallback"
-            );
-        }
        for writer_id in stale_writer_ids {
            self.mark_writer_draining_with_timeout(writer_id, drain_timeout, !hardswap)
                .await;
-            if can_drop_with_replacement {
-                self.stats.increment_pool_force_close_total();
-                self.remove_writer_and_close_clients(writer_id).await;
-            }
        }
        if hardswap {
            self.clear_pending_hardswap_state();
@@ -541,3 +487,61 @@ impl MePool {
        self.zero_downtime_reinit_after_map_change(rng).await;
    }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::collections::{HashMap, HashSet};
+    use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+
+    use super::MePool;
+
+    fn addr(octet: u8, port: u16) -> SocketAddr {
+        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, octet)), port)
+    }
+
+    #[test]
+    fn coverage_ratio_counts_dc_coverage_not_floor() {
+        let dc1 = addr(1, 2001);
+        let dc2 = addr(2, 2002);
+
+        let mut desired_by_dc = HashMap::<i32, HashSet<SocketAddr>>::new();
+        desired_by_dc.insert(1, HashSet::from([dc1]));
+        desired_by_dc.insert(2, HashSet::from([dc2]));
+
+        let active_writer_addrs = HashSet::from([(1, dc1)]);
+        let (ratio, missing_dc) = MePool::coverage_ratio(&desired_by_dc, &active_writer_addrs);
+
+        assert_eq!(ratio, 0.5);
+        assert_eq!(missing_dc, vec![2]);
+    }
+
+    #[test]
+    fn coverage_ratio_ignores_empty_dc_groups() {
+        let dc1 = addr(1, 2001);
+
+        let mut desired_by_dc = HashMap::<i32, HashSet<SocketAddr>>::new();
+        desired_by_dc.insert(1, HashSet::from([dc1]));
+        desired_by_dc.insert(2, HashSet::new());
+
+        let active_writer_addrs = HashSet::from([(1, dc1)]);
+        let (ratio, missing_dc) = MePool::coverage_ratio(&desired_by_dc, &active_writer_addrs);
+
+        assert_eq!(ratio, 1.0);
+        assert!(missing_dc.is_empty());
+    }
+
+    #[test]
+    fn coverage_ratio_reports_missing_dcs_sorted() {
+        let dc1 = addr(1, 2001);
+        let dc2 = addr(2, 2002);
+
+        let mut desired_by_dc = HashMap::<i32, HashSet<SocketAddr>>::new();
+        desired_by_dc.insert(2, HashSet::from([dc2]));
+        desired_by_dc.insert(1, HashSet::from([dc1]));
+
+        let (ratio, missing_dc) = MePool::coverage_ratio(&desired_by_dc, &HashSet::new());
+
+        assert_eq!(ratio, 0.0);
+        assert_eq!(missing_dc, vec![1, 2]);
+    }
+}
@@ -40,6 +40,7 @@ pub(crate) struct MeApiDcStatusSnapshot {
    pub floor_max: usize,
    pub floor_capped: bool,
    pub alive_writers: usize,
+    pub coverage_ratio: f64,
    pub coverage_pct: f64,
    pub fresh_alive_writers: usize,
    pub fresh_coverage_pct: f64,
@@ -62,6 +63,7 @@ pub(crate) struct MeApiStatusSnapshot {
    pub available_pct: f64,
    pub required_writers: usize,
    pub alive_writers: usize,
+    pub coverage_ratio: f64,
    pub coverage_pct: f64,
    pub fresh_alive_writers: usize,
    pub fresh_coverage_pct: f64,
@@ -124,6 +126,12 @@ pub(crate) struct MeApiRuntimeSnapshot {
    pub me_reconnect_backoff_cap_ms: u64,
    pub me_reconnect_fast_retry_count: u32,
    pub me_pool_drain_ttl_secs: u64,
+    pub me_instadrain: bool,
+    pub me_pool_drain_soft_evict_enabled: bool,
+    pub me_pool_drain_soft_evict_grace_secs: u64,
+    pub me_pool_drain_soft_evict_per_writer: u8,
+    pub me_pool_drain_soft_evict_budget_per_core: u16,
+    pub me_pool_drain_soft_evict_cooldown_ms: u64,
    pub me_pool_force_close_secs: u64,
    pub me_pool_min_fresh_ratio: f32,
    pub me_bind_stale_mode: &'static str,
@@ -337,6 +345,8 @@ impl MePool {
        let mut available_endpoints = 0usize;
        let mut alive_writers = 0usize;
        let mut fresh_alive_writers = 0usize;
+        let mut coverage_ratio_dcs_total = 0usize;
+        let mut coverage_ratio_dcs_covered = 0usize;
        let floor_mode = self.floor_mode();
        let adaptive_cpu_cores = (self
            .me_adaptive_floor_cpu_cores_effective
@@ -388,6 +398,12 @@ impl MePool {
            available_endpoints += dc_available_endpoints;
            alive_writers += dc_alive_writers;
            fresh_alive_writers += dc_fresh_alive_writers;
+            if endpoint_count > 0 {
+                coverage_ratio_dcs_total += 1;
+                if dc_alive_writers > 0 {
+                    coverage_ratio_dcs_covered += 1;
+                }
+            }

            dcs.push(MeApiDcStatusSnapshot {
                dc,
@@ -410,6 +426,11 @@ impl MePool {
                floor_max,
                floor_capped,
                alive_writers: dc_alive_writers,
+                coverage_ratio: if endpoint_count > 0 && dc_alive_writers > 0 {
+                    100.0
+                } else {
+                    0.0
+                },
                coverage_pct: ratio_pct(dc_alive_writers, dc_required_writers),
                fresh_alive_writers: dc_fresh_alive_writers,
                fresh_coverage_pct: ratio_pct(dc_fresh_alive_writers, dc_required_writers),
@@ -426,6 +447,7 @@ impl MePool {
            available_pct: ratio_pct(available_endpoints, configured_endpoints),
            required_writers,
            alive_writers,
+            coverage_ratio: ratio_pct(coverage_ratio_dcs_covered, coverage_ratio_dcs_total),
            coverage_pct: ratio_pct(alive_writers, required_writers),
            fresh_alive_writers,
            fresh_coverage_pct: ratio_pct(fresh_alive_writers, required_writers),
@@ -562,6 +584,23 @@ impl MePool {
            me_reconnect_backoff_cap_ms: self.me_reconnect_backoff_cap.as_millis() as u64,
            me_reconnect_fast_retry_count: self.me_reconnect_fast_retry_count,
            me_pool_drain_ttl_secs: self.me_pool_drain_ttl_secs.load(Ordering::Relaxed),
+            me_instadrain: self.me_instadrain.load(Ordering::Relaxed),
+            me_pool_drain_soft_evict_enabled: self
+                .me_pool_drain_soft_evict_enabled
+                .load(Ordering::Relaxed),
+            me_pool_drain_soft_evict_grace_secs: self
+                .me_pool_drain_soft_evict_grace_secs
+                .load(Ordering::Relaxed),
+            me_pool_drain_soft_evict_per_writer: self
+                .me_pool_drain_soft_evict_per_writer
+                .load(Ordering::Relaxed),
+            me_pool_drain_soft_evict_budget_per_core: self
+                .me_pool_drain_soft_evict_budget_per_core
+                .load(Ordering::Relaxed)
+                .min(u16::MAX as u32) as u16,
+            me_pool_drain_soft_evict_cooldown_ms: self
+                .me_pool_drain_soft_evict_cooldown_ms
+                .load(Ordering::Relaxed),
            me_pool_force_close_secs: self.me_pool_force_close_secs.load(Ordering::Relaxed),
            me_pool_min_fresh_ratio: Self::permille_to_ratio(
                self.me_pool_min_fresh_ratio_permille.load(Ordering::Relaxed),
@@ -8,6 +8,7 @@ use bytes::Bytes;
 use bytes::BytesMut;
 use rand::Rng;
 use tokio::sync::mpsc;
+use tokio::sync::mpsc::error::TrySendError;
 use tokio_util::sync::CancellationToken;
 use tracing::{debug, info, warn};

@@ -42,10 +43,11 @@ impl MePool {
        }

        for writer_id in closed_writer_ids {
-            if self.remove_writer_if_empty(writer_id).await {
-                continue;
+            if self.registry.is_writer_empty(writer_id).await {
+                let _ = self.remove_writer_only(writer_id).await;
+            } else {
+                let _ = self.remove_writer_and_close_clients(writer_id).await;
            }
-            let _ = self.remove_writer_and_close_clients(writer_id).await;
        }
    }

@@ -311,41 +313,28 @@ impl MePool {
                let mut p = Vec::with_capacity(12);
                p.extend_from_slice(&RPC_PING_U32.to_le_bytes());
                p.extend_from_slice(&sent_id.to_le_bytes());
-                {
-                    let mut tracker = ping_tracker_ping.lock().await;
-                    let now_epoch_ms = std::time::SystemTime::now()
-                        .duration_since(std::time::UNIX_EPOCH)
-                        .unwrap_or_default()
-                        .as_millis() as u64;
-                    let mut run_cleanup = false;
-                    if let Some(pool) = pool_ping.upgrade() {
-                        let last_cleanup_ms = pool
+                let now_epoch_ms = std::time::SystemTime::now()
+                    .duration_since(std::time::UNIX_EPOCH)
+                    .unwrap_or_default()
+                    .as_millis() as u64;
+                let mut run_cleanup = false;
+                if let Some(pool) = pool_ping.upgrade() {
+                    let last_cleanup_ms = pool
+                        .ping_tracker_last_cleanup_epoch_ms
+                        .load(Ordering::Relaxed);
+                    if now_epoch_ms.saturating_sub(last_cleanup_ms) >= 30_000
+                        && pool
                            .ping_tracker_last_cleanup_epoch_ms
-                            .load(Ordering::Relaxed);
-                        if now_epoch_ms.saturating_sub(last_cleanup_ms) >= 30_000
-                            && pool
-                                .ping_tracker_last_cleanup_epoch_ms
-                                .compare_exchange(
-                                    last_cleanup_ms,
-                                    now_epoch_ms,
-                                    Ordering::AcqRel,
-                                    Ordering::Relaxed,
-                                )
-                                .is_ok()
-                        {
-                            run_cleanup = true;
-                        }
+                            .compare_exchange(
+                                last_cleanup_ms,
+                                now_epoch_ms,
+                                Ordering::AcqRel,
+                                Ordering::Relaxed,
+                            )
+                            .is_ok()
+                    {
+                        run_cleanup = true;
                    }
-
-                    if run_cleanup {
-                        let before = tracker.len();
-                        tracker.retain(|_, (ts, _)| ts.elapsed() < Duration::from_secs(120));
-                        let expired = before.saturating_sub(tracker.len());
-                        if expired > 0 {
-                            stats_ping.increment_me_keepalive_timeout_by(expired as u64);
-                        }
-                    }
-                    tracker.insert(sent_id, (std::time::Instant::now(), writer_id));
                }
                ping_id = ping_id.wrapping_add(1);
                stats_ping.increment_me_keepalive_sent();
@@ -366,6 +355,16 @@ impl MePool {
                    }
                    break;
                }
+                let mut tracker = ping_tracker_ping.lock().await;
+                if run_cleanup {
+                    let before = tracker.len();
+                    tracker.retain(|_, (ts, _)| ts.elapsed() < Duration::from_secs(120));
+                    let expired = before.saturating_sub(tracker.len());
+                    if expired > 0 {
+                        stats_ping.increment_me_keepalive_timeout_by(expired as u64);
+                    }
+                }
+                tracker.insert(sent_id, (std::time::Instant::now(), writer_id));
            }
        });

@@ -493,22 +492,9 @@ impl MePool {
    }

    pub(crate) async fn remove_writer_and_close_clients(self: &Arc<Self>, writer_id: u64) {
-        let conns = self.remove_writer_only(writer_id).await;
-        for bound in conns {
-            let _ = self.registry.route(bound.conn_id, super::MeResponse::Close).await;
-            let _ = self.registry.unregister(bound.conn_id).await;
-        }
-    }
-
-    pub(crate) async fn remove_writer_if_empty(self: &Arc<Self>, writer_id: u64) -> bool {
-        if !self.registry.unregister_writer_if_empty(writer_id).await {
-            return false;
-        }
-
-        // The registry empty-check and unregister are atomic with respect to binds,
-        // so remove_writer_only cannot return active bound sessions here.
+        // Full client cleanup now happens inside `registry.writer_lost` to keep
+        // writer reap/remove paths strictly non-blocking per connection.
        let _ = self.remove_writer_only(writer_id).await;
-        true
    }

    async fn remove_writer_only(self: &Arc<Self>, writer_id: u64) -> Vec<BoundConn> {
@@ -524,7 +510,6 @@ impl MePool {
                let was_draining = w.draining.load(Ordering::Relaxed);
                if was_draining {
                    self.stats.decrement_pool_drain_active();
-                    self.decrement_draining_active_runtime();
                }
                self.stats.increment_me_writer_removed_total();
                w.cancel.cancel();
@@ -539,6 +524,11 @@ impl MePool {
                self.conn_count.fetch_sub(1, Ordering::Relaxed);
            }
        }
+        // State invariant:
+        // - writer is removed from `self.writers` (pool visibility),
+        // - writer is removed from registry routing/binding maps via `writer_lost`.
+        // The close command below is only a best-effort accelerator for task shutdown.
+        // Cleanup progress must never depend on command-channel availability.
        let conns = self.registry.writer_lost(writer_id).await;
        {
            let mut tracker = self.ping_tracker.lock().await;
@@ -546,7 +536,25 @@ impl MePool {
        }
        self.rtt_stats.lock().await.remove(&writer_id);
        if let Some(tx) = close_tx {
-            let _ = tx.send(WriterCommand::Close).await;
+            match tx.try_send(WriterCommand::Close) {
+                Ok(()) => {}
+                Err(TrySendError::Full(_)) => {
+                    self.stats.increment_me_writer_close_signal_drop_total();
+                    self.stats
+                        .increment_me_writer_close_signal_channel_full_total();
+                    debug!(
+                        writer_id,
+                        "Skipping close signal for removed writer: command channel is full"
+                    );
+                }
+                Err(TrySendError::Closed(_)) => {
+                    self.stats.increment_me_writer_close_signal_drop_total();
+                    debug!(
+                        writer_id,
+                        "Skipping close signal for removed writer: command channel is closed"
+                    );
+                }
+            }
        }
        if trigger_refill
            && let Some(addr) = removed_addr
@@ -583,7 +591,6 @@ impl MePool {
                    .store(drain_deadline_epoch_secs, Ordering::Relaxed);
                if !already_draining {
                    self.stats.increment_pool_drain_active();
-                    self.increment_draining_active_runtime();
                }
                w.contour
                    .store(WriterContour::Draining.as_u8(), Ordering::Relaxed);
@@ -8,6 +8,7 @@ use bytes::{Bytes, BytesMut};
 use tokio::io::AsyncReadExt;
 use tokio::net::TcpStream;
 use tokio::sync::{Mutex, mpsc};
+use tokio::sync::mpsc::error::TrySendError;
 use tokio_util::sync::CancellationToken;
 use tracing::{debug, trace, warn};

@@ -173,12 +174,12 @@ pub(crate) async fn reader_loop(
            } else if pt == RPC_CLOSE_EXT_U32 && body.len() >= 8 {
                let cid = u64::from_le_bytes(body[0..8].try_into().unwrap());
                debug!(cid, "RPC_CLOSE_EXT from ME");
-                reg.route(cid, MeResponse::Close).await;
+                let _ = reg.route_nowait(cid, MeResponse::Close).await;
                reg.unregister(cid).await;
            } else if pt == RPC_CLOSE_CONN_U32 && body.len() >= 8 {
                let cid = u64::from_le_bytes(body[0..8].try_into().unwrap());
                debug!(cid, "RPC_CLOSE_CONN from ME");
-                reg.route(cid, MeResponse::Close).await;
+                let _ = reg.route_nowait(cid, MeResponse::Close).await;
                reg.unregister(cid).await;
            } else if pt == RPC_PING_U32 && body.len() >= 8 {
                let ping_id = i64::from_le_bytes(body[0..8].try_into().unwrap());
@@ -186,13 +187,15 @@ pub(crate) async fn reader_loop(
                let mut pong = Vec::with_capacity(12);
                pong.extend_from_slice(&RPC_PONG_U32.to_le_bytes());
                pong.extend_from_slice(&ping_id.to_le_bytes());
-                if tx
-                    .send(WriterCommand::DataAndFlush(Bytes::from(pong)))
-                    .await
-                    .is_err()
-                {
-                    warn!("PONG send failed");
-                    break;
+                match tx.try_send(WriterCommand::DataAndFlush(Bytes::from(pong))) {
+                    Ok(()) => {}
+                    Err(TrySendError::Full(_)) => {
+                        debug!(ping_id, "PONG dropped: writer command channel is full");
+                    }
+                    Err(TrySendError::Closed(_)) => {
+                        warn!("PONG send failed: writer channel closed");
+                        break;
+                    }
                }
            } else if pt == RPC_PONG_U32 && body.len() >= 8 {
                let ping_id = i64::from_le_bytes(body[0..8].try_into().unwrap());
@@ -232,6 +235,13 @@ async fn send_close_conn(tx: &mpsc::Sender<WriterCommand>, conn_id: u64) {
    let mut p = Vec::with_capacity(12);
    p.extend_from_slice(&RPC_CLOSE_CONN_U32.to_le_bytes());
    p.extend_from_slice(&conn_id.to_le_bytes());
-
-    let _ = tx.send(WriterCommand::DataAndFlush(Bytes::from(p))).await;
+    match tx.try_send(WriterCommand::DataAndFlush(Bytes::from(p))) {
+        Ok(()) => {}
+        Err(TrySendError::Full(_)) => {
+            debug!(conn_id, "ME close_conn signal skipped: writer command channel is full");
+        }
+        Err(TrySendError::Closed(_)) => {
+            debug!(conn_id, "ME close_conn signal skipped: writer command channel is closed");
+        }
+    }
 }
@@ -169,6 +169,7 @@ impl ConnRegistry {
        None
    }

+    #[allow(dead_code)]
    pub async fn route(&self, id: u64, resp: MeResponse) -> RouteResult {
        let tx = {
            let inner = self.inner.read().await;
@@ -394,31 +395,89 @@ impl ConnRegistry {
        inner.writer_for_conn.keys().copied().collect()
    }

-    pub async fn writer_lost(&self, writer_id: u64) -> Vec<BoundConn> {
-        let mut inner = self.inner.write().await;
-        inner.writers.remove(&writer_id);
-        inner.last_meta_for_writer.remove(&writer_id);
-        inner.writer_idle_since_epoch_secs.remove(&writer_id);
-        let conns = inner
-            .conns_for_writer
-            .remove(&writer_id)
-            .unwrap_or_default()
-            .into_iter()
-            .collect::<Vec<_>>();
+    pub(super) async fn bound_conn_ids_for_writer_limited(
+        &self,
+        writer_id: u64,
+        limit: usize,
+    ) -> Vec<u64> {
+        if limit == 0 {
+            return Vec::new();
+        }
+        let inner = self.inner.read().await;
+        let Some(conn_ids) = inner.conns_for_writer.get(&writer_id) else {
+            return Vec::new();
+        };
+        let mut out = conn_ids.iter().copied().collect::<Vec<_>>();
+        out.sort_unstable();
+        out.truncate(limit);
+        out
+    }

-        let mut out = Vec::new();
-        for conn_id in conns {
+    pub(super) async fn evict_bound_conn_if_writer(&self, conn_id: u64, writer_id: u64) -> bool {
+        let maybe_client_tx = {
+            let mut inner = self.inner.write().await;
            if inner.writer_for_conn.get(&conn_id).copied() != Some(writer_id) {
-                continue;
+                return false;
            }
+
+            let client_tx = inner.map.get(&conn_id).cloned();
+            inner.map.remove(&conn_id);
+            inner.meta.remove(&conn_id);
            inner.writer_for_conn.remove(&conn_id);
-            if let Some(m) = inner.meta.get(&conn_id) {
-                out.push(BoundConn {
-                    conn_id,
-                    meta: m.clone(),
-                });
+
+            let became_empty = if let Some(set) = inner.conns_for_writer.get_mut(&writer_id) {
+                set.remove(&conn_id);
+                set.is_empty()
+            } else {
+                false
+            };
+            if became_empty {
+                inner
+                    .writer_idle_since_epoch_secs
+                    .insert(writer_id, Self::now_epoch_secs());
+            }
+            client_tx
+        };
+
+        if let Some(client_tx) = maybe_client_tx {
+            let _ = client_tx.try_send(MeResponse::Close);
+        }
+        true
+    }
+
+    pub async fn writer_lost(&self, writer_id: u64) -> Vec<BoundConn> {
+        let mut close_txs = Vec::<mpsc::Sender<MeResponse>>::new();
+        let mut out = Vec::new();
+        {
+            let mut inner = self.inner.write().await;
+            inner.writers.remove(&writer_id);
+            inner.last_meta_for_writer.remove(&writer_id);
+            inner.writer_idle_since_epoch_secs.remove(&writer_id);
+            let conns = inner
+                .conns_for_writer
+                .remove(&writer_id)
+                .unwrap_or_default()
+                .into_iter()
+                .collect::<Vec<_>>();
+
+            for conn_id in conns {
+                if inner.writer_for_conn.get(&conn_id).copied() != Some(writer_id) {
+                    continue;
+                }
+                inner.writer_for_conn.remove(&conn_id);
+                if let Some(client_tx) = inner.map.remove(&conn_id) {
+                    close_txs.push(client_tx);
+                }
+                if let Some(meta) = inner.meta.remove(&conn_id) {
+                    out.push(BoundConn { conn_id, meta });
+                }
            }
        }
+
+        for client_tx in close_txs {
+            let _ = client_tx.try_send(MeResponse::Close);
+        }
+
        out
    }

@@ -436,45 +495,16 @@ impl ConnRegistry {
            .map(|s| s.is_empty())
            .unwrap_or(true)
    }
-
-    pub async fn unregister_writer_if_empty(&self, writer_id: u64) -> bool {
-        let mut inner = self.inner.write().await;
-        let Some(conn_ids) = inner.conns_for_writer.get(&writer_id) else {
-            // Writer is already absent from the registry.
-            return true;
-        };
-        if !conn_ids.is_empty() {
-            return false;
-        }
-
-        inner.writers.remove(&writer_id);
-        inner.last_meta_for_writer.remove(&writer_id);
-        inner.writer_idle_since_epoch_secs.remove(&writer_id);
-        inner.conns_for_writer.remove(&writer_id);
-        true
-    }
-
-    #[allow(dead_code)]
-    pub(super) async fn non_empty_writer_ids(&self, writer_ids: &[u64]) -> HashSet<u64> {
-        let inner = self.inner.read().await;
-        let mut out = HashSet::<u64>::with_capacity(writer_ids.len());
-        for writer_id in writer_ids {
-            if let Some(conns) = inner.conns_for_writer.get(writer_id)
-                && !conns.is_empty()
-            {
-                out.insert(*writer_id);
-            }
-        }
-        out
-    }
 }

 #[cfg(test)]
 mod tests {
    use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+    use std::time::Duration;

    use super::ConnMeta;
    use super::ConnRegistry;
+    use super::MeResponse;

    #[tokio::test]
    async fn writer_activity_snapshot_tracks_writer_and_dc_load() {
@@ -643,6 +673,39 @@ mod tests {
        assert!(registry.is_writer_empty(20).await);
    }

+    #[tokio::test]
+    async fn writer_lost_removes_bound_conn_from_registry_and_signals_close() {
+        let registry = ConnRegistry::new();
+        let (conn_id, mut rx) = registry.register().await;
+        let (writer_tx, _writer_rx) = tokio::sync::mpsc::channel(8);
+        registry.register_writer(10, writer_tx).await;
+        let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443);
+
+        assert!(
+            registry
+                .bind_writer(
+                    conn_id,
+                    10,
+                    ConnMeta {
+                        target_dc: 2,
+                        client_addr: addr,
+                        our_addr: addr,
+                        proto_flags: 0,
+                    },
+                )
+                .await
+        );
+
+        let lost = registry.writer_lost(10).await;
+        assert_eq!(lost.len(), 1);
+        assert_eq!(lost[0].conn_id, conn_id);
+        assert!(registry.get_writer(conn_id).await.is_none());
+        assert!(registry.get_meta(conn_id).await.is_none());
+        assert_eq!(registry.unregister(conn_id).await, None);
+        let close = tokio::time::timeout(Duration::from_millis(50), rx.recv()).await;
+        assert!(matches!(close, Ok(Some(MeResponse::Close))));
+    }
+
    #[tokio::test]
    async fn bind_writer_rejects_unregistered_writer() {
        let registry = ConnRegistry::new();
@@ -667,15 +730,47 @@ mod tests {
    }

    #[tokio::test]
-    async fn non_empty_writer_ids_returns_only_writers_with_bound_clients() {
+    async fn bound_conn_ids_for_writer_limited_is_sorted_and_bounded() {
        let registry = ConnRegistry::new();
-        let (conn_id, _rx) = registry.register().await;
+        let (writer_tx, _writer_rx) = tokio::sync::mpsc::channel(8);
+        registry.register_writer(10, writer_tx).await;
+        let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443);
+        let mut conn_ids = Vec::new();
+        for _ in 0..5 {
+            let (conn_id, _rx) = registry.register().await;
+            assert!(
+                registry
+                    .bind_writer(
+                        conn_id,
+                        10,
+                        ConnMeta {
+                            target_dc: 2,
+                            client_addr: addr,
+                            our_addr: addr,
+                            proto_flags: 0,
+                        },
+                    )
+                    .await
+            );
+            conn_ids.push(conn_id);
+        }
+        conn_ids.sort_unstable();
+
+        let limited = registry.bound_conn_ids_for_writer_limited(10, 3).await;
+        assert_eq!(limited.len(), 3);
+        assert_eq!(limited, conn_ids.into_iter().take(3).collect::<Vec<_>>());
+    }
+
+    #[tokio::test]
+    async fn evict_bound_conn_if_writer_does_not_touch_rebound_conn() {
+        let registry = ConnRegistry::new();
+        let (conn_id, mut rx) = registry.register().await;
        let (writer_tx_a, _writer_rx_a) = tokio::sync::mpsc::channel(8);
        let (writer_tx_b, _writer_rx_b) = tokio::sync::mpsc::channel(8);
        registry.register_writer(10, writer_tx_a).await;
        registry.register_writer(20, writer_tx_b).await;
-
        let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443);
+
        assert!(
            registry
                .bind_writer(
@@ -690,10 +785,29 @@ mod tests {
                )
                .await
        );
+        assert!(
+            registry
+                .bind_writer(
+                    conn_id,
+                    20,
+                    ConnMeta {
+                        target_dc: 2,
+                        client_addr: addr,
+                        our_addr: addr,
+                        proto_flags: 1,
+                    },
+                )
+                .await
+        );

-        let non_empty = registry.non_empty_writer_ids(&[10, 20, 30]).await;
-        assert!(non_empty.contains(&10));
-        assert!(!non_empty.contains(&20));
-        assert!(!non_empty.contains(&30));
+        let evicted = registry.evict_bound_conn_if_writer(conn_id, 10).await;
+        assert!(!evicted);
+        assert_eq!(registry.get_writer(conn_id).await.expect("writer").writer_id, 20);
+        assert!(rx.try_recv().is_err());
+
+        let evicted = registry.evict_bound_conn_if_writer(conn_id, 20).await;
+        assert!(evicted);
+        assert!(registry.get_writer(conn_id).await.is_none());
+        assert!(matches!(rx.try_recv(), Ok(MeResponse::Close)));
    }
 }
@@ -6,6 +6,7 @@ use std::sync::atomic::Ordering;
 use std::time::{Duration, Instant};

 use bytes::Bytes;
+use tokio::sync::mpsc;
 use tokio::sync::mpsc::error::TrySendError;
 use tracing::{debug, warn};

@@ -29,6 +30,29 @@ const PICK_PENALTY_DRAINING: u64 = 600;
 const PICK_PENALTY_STALE: u64 = 300;
 const PICK_PENALTY_DEGRADED: u64 = 250;

+enum TimedSendError<T> {
+    Closed(T),
+    Timeout(T),
+}
+
+async fn send_writer_command_with_timeout(
+    tx: &mpsc::Sender<WriterCommand>,
+    cmd: WriterCommand,
+    timeout: Duration,
+) -> std::result::Result<(), TimedSendError<WriterCommand>> {
+    if timeout.is_zero() {
+        return tx.send(cmd).await.map_err(|err| TimedSendError::Closed(err.0));
+    }
+    match tokio::time::timeout(timeout, tx.reserve()).await {
+        Ok(Ok(permit)) => {
+            permit.send(cmd);
+            Ok(())
+        }
+        Ok(Err(_)) => Err(TimedSendError::Closed(cmd)),
+        Err(_) => Err(TimedSendError::Timeout(cmd)),
+    }
+}
+
 impl MePool {
    /// Send RPC_PROXY_REQ. `tag_override`: per-user ad_tag (from access.user_ad_tags); if None, uses pool default.
    pub async fn send_proxy_req(
@@ -78,8 +102,18 @@ impl MePool {
        let mut hybrid_last_recovery_at: Option<Instant> = None;
        let hybrid_wait_step = self.me_route_no_writer_wait.max(Duration::from_millis(50));
        let mut hybrid_wait_current = hybrid_wait_step;
+        let hybrid_deadline = Instant::now() + self.me_route_hybrid_max_wait;

        loop {
+            if matches!(no_writer_mode, MeRouteNoWriterMode::HybridAsyncPersistent)
+                && Instant::now() >= hybrid_deadline
+            {
+                self.stats.increment_me_no_writer_failfast_total();
+                return Err(ProxyError::Proxy(
+                    "No ME writer available in hybrid wait window".into(),
+                ));
+            }
+            let mut skip_writer_id: Option<u64> = None;
            let current_meta = self
                .registry
                .get_meta(conn_id)
@@ -90,12 +124,30 @@ impl MePool {
                match current.tx.try_send(WriterCommand::Data(current_payload.clone())) {
                    Ok(()) => return Ok(()),
                    Err(TrySendError::Full(cmd)) => {
-                        if current.tx.send(cmd).await.is_ok() {
-                            return Ok(());
+                        match send_writer_command_with_timeout(
+                            &current.tx,
+                            cmd,
+                            self.me_route_blocking_send_timeout,
+                        )
+                        .await
+                        {
+                            Ok(()) => return Ok(()),
+                            Err(TimedSendError::Closed(_)) => {
+                                warn!(writer_id = current.writer_id, "ME writer channel closed");
+                                self.remove_writer_and_close_clients(current.writer_id).await;
+                                continue;
+                            }
+                            Err(TimedSendError::Timeout(_)) => {
+                                debug!(
+                                    conn_id,
+                                    writer_id = current.writer_id,
+                                    timeout_ms = self.me_route_blocking_send_timeout.as_millis()
+                                        as u64,
+                                    "ME writer send timed out for bound writer, trying reroute"
+                                );
+                                skip_writer_id = Some(current.writer_id);
+                            }
                        }
-                        warn!(writer_id = current.writer_id, "ME writer channel closed");
-                        self.remove_writer_and_close_clients(current.writer_id).await;
-                        continue;
                    }
                    Err(TrySendError::Closed(_)) => {
                        warn!(writer_id = current.writer_id, "ME writer channel closed");
@@ -200,6 +252,9 @@ impl MePool {
                    .candidate_indices_for_dc(&writers_snapshot, routed_dc, true)
                    .await;
            }
+            if let Some(skip_writer_id) = skip_writer_id {
+                candidate_indices.retain(|idx| writers_snapshot[*idx].id != skip_writer_id);
+            }
            if candidate_indices.is_empty() {
                let pick_mode = self.writer_pick_mode();
                match no_writer_mode {
@@ -372,20 +427,17 @@ impl MePool {
                }
                let effective_our_addr = SocketAddr::new(w.source_ip, our_addr.port());
                let (payload, meta) = build_routed_payload(effective_our_addr);
-                match w.tx.clone().try_reserve_owned() {
-                    Ok(permit) => {
+                match w.tx.try_send(WriterCommand::Data(payload.clone())) {
+                    Ok(()) => {
+                        self.stats.increment_me_writer_pick_success_try_total(pick_mode);
                        if !self.registry.bind_writer(conn_id, w.id, meta).await {
                            debug!(
                                conn_id,
                                writer_id = w.id,
-                                "ME writer disappeared before bind commit, pruning stale writer"
+                                "ME writer disappeared before bind commit, retrying"
                            );
-                            drop(permit);
-                            self.remove_writer_and_close_clients(w.id).await;
                            continue;
                        }
-                        permit.send(WriterCommand::Data(payload.clone()));
-                        self.stats.increment_me_writer_pick_success_try_total(pick_mode);
                        if w.generation < self.current_generation() {
                            self.stats.increment_pool_stale_pick_total();
                            debug!(
@@ -425,31 +477,43 @@ impl MePool {
            self.stats.increment_me_writer_pick_blocking_fallback_total();
            let effective_our_addr = SocketAddr::new(w.source_ip, our_addr.port());
            let (payload, meta) = build_routed_payload(effective_our_addr);
-            match w.tx.clone().reserve_owned().await {
-                Ok(permit) => {
+            match send_writer_command_with_timeout(
+                &w.tx,
+                WriterCommand::Data(payload.clone()),
+                self.me_route_blocking_send_timeout,
+            )
+            .await
+            {
+                Ok(()) => {
+                    self.stats
+                        .increment_me_writer_pick_success_fallback_total(pick_mode);
                    if !self.registry.bind_writer(conn_id, w.id, meta).await {
                        debug!(
                            conn_id,
                            writer_id = w.id,
-                            "ME writer disappeared before fallback bind commit, pruning stale writer"
+                            "ME writer disappeared before fallback bind commit, retrying"
                        );
-                        drop(permit);
-                        self.remove_writer_and_close_clients(w.id).await;
                        continue;
                    }
-                    permit.send(WriterCommand::Data(payload.clone()));
-                    self.stats
-                        .increment_me_writer_pick_success_fallback_total(pick_mode);
                    if w.generation < self.current_generation() {
                        self.stats.increment_pool_stale_pick_total();
                    }
                    return Ok(());
                }
-                Err(_) => {
+                Err(TimedSendError::Closed(_)) => {
                    self.stats.increment_me_writer_pick_closed_total(pick_mode);
                    warn!(writer_id = w.id, "ME writer channel closed (blocking)");
                    self.remove_writer_and_close_clients(w.id).await;
                }
+                Err(TimedSendError::Timeout(_)) => {
+                    self.stats.increment_me_writer_pick_full_total(pick_mode);
+                    debug!(
+                        conn_id,
+                        writer_id = w.id,
+                        timeout_ms = self.me_route_blocking_send_timeout.as_millis() as u64,
+                        "ME writer blocking fallback send timed out"
+                    );
+                }
            }
        }
    }
@@ -579,13 +643,19 @@ impl MePool {
            let mut p = Vec::with_capacity(12);
            p.extend_from_slice(&RPC_CLOSE_EXT_U32.to_le_bytes());
            p.extend_from_slice(&conn_id.to_le_bytes());
-            if w.tx
-                .send(WriterCommand::DataAndFlush(Bytes::from(p)))
-                .await
-                .is_err()
-            {
-                debug!("ME close write failed");
-                self.remove_writer_and_close_clients(w.writer_id).await;
+            match w.tx.try_send(WriterCommand::DataAndFlush(Bytes::from(p))) {
+                Ok(()) => {}
+                Err(TrySendError::Full(_)) => {
+                    debug!(
+                        conn_id,
+                        writer_id = w.writer_id,
+                        "ME close skipped: writer command channel is full"
+                    );
+                }
+                Err(TrySendError::Closed(_)) => {
+                    debug!("ME close write failed");
+                    self.remove_writer_and_close_clients(w.writer_id).await;
+                }
            }
        } else {
            debug!(conn_id, "ME close skipped (writer missing)");
@@ -602,8 +672,12 @@ impl MePool {
            p.extend_from_slice(&conn_id.to_le_bytes());
            match w.tx.try_send(WriterCommand::DataAndFlush(Bytes::from(p))) {
                Ok(()) => {}
-                Err(TrySendError::Full(cmd)) => {
-                    let _ = tokio::time::timeout(Duration::from_millis(50), w.tx.send(cmd)).await;
+                Err(TrySendError::Full(_)) => {
+                    debug!(
+                        conn_id,
+                        writer_id = w.writer_id,
+                        "ME close_conn skipped: writer command channel is full"
+                    );
                }
                Err(TrySendError::Closed(_)) => {
                    debug!(conn_id, "ME close_conn skipped: writer channel closed");
@@ -1,263 +0,0 @@
-use std::collections::HashMap;
-use std::net::{IpAddr, Ipv4Addr, SocketAddr};
-use std::sync::Arc;
-use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU32, AtomicU64, Ordering};
-use std::time::{Duration, Instant};
-
-use tokio::sync::mpsc;
-use tokio_util::sync::CancellationToken;
-
-use super::codec::WriterCommand;
-use super::pool::{MePool, MeWriter, WriterContour};
-use crate::config::{GeneralConfig, MeRouteNoWriterMode, MeSocksKdfPolicy, MeWriterPickMode};
-use crate::crypto::SecureRandom;
-use crate::network::probe::NetworkDecision;
-use crate::stats::Stats;
-
-async fn make_pool() -> (Arc<MePool>, Arc<SecureRandom>) {
-    let general = GeneralConfig {
-        me_route_no_writer_mode: MeRouteNoWriterMode::AsyncRecoveryFailfast,
-        me_route_no_writer_wait_ms: 50,
-        me_writer_pick_mode: MeWriterPickMode::SortedRr,
-        me_deterministic_writer_sort: true,
-        ..GeneralConfig::default()
-    };
-
-    let rng = Arc::new(SecureRandom::new());
-    let pool = MePool::new(
-        None,
-        vec![1u8; 32],
-        None,
-        false,
-        None,
-        Vec::new(),
-        1,
-        None,
-        12,
-        1200,
-        HashMap::new(),
-        HashMap::new(),
-        None,
-        NetworkDecision::default(),
-        None,
-        rng.clone(),
-        Arc::new(Stats::default()),
-        general.me_keepalive_enabled,
-        general.me_keepalive_interval_secs,
-        general.me_keepalive_jitter_secs,
-        general.me_keepalive_payload_random,
-        general.rpc_proxy_req_every,
-        general.me_warmup_stagger_enabled,
-        general.me_warmup_step_delay_ms,
-        general.me_warmup_step_jitter_ms,
-        general.me_reconnect_max_concurrent_per_dc,
-        general.me_reconnect_backoff_base_ms,
-        general.me_reconnect_backoff_cap_ms,
-        general.me_reconnect_fast_retry_count,
-        general.me_single_endpoint_shadow_writers,
-        general.me_single_endpoint_outage_mode_enabled,
-        general.me_single_endpoint_outage_disable_quarantine,
-        general.me_single_endpoint_outage_backoff_min_ms,
-        general.me_single_endpoint_outage_backoff_max_ms,
-        general.me_single_endpoint_shadow_rotate_every_secs,
-        general.me_floor_mode,
-        general.me_adaptive_floor_idle_secs,
-        general.me_adaptive_floor_min_writers_single_endpoint,
-        general.me_adaptive_floor_min_writers_multi_endpoint,
-        general.me_adaptive_floor_recover_grace_secs,
-        general.me_adaptive_floor_writers_per_core_total,
-        general.me_adaptive_floor_cpu_cores_override,
-        general.me_adaptive_floor_max_extra_writers_single_per_core,
-        general.me_adaptive_floor_max_extra_writers_multi_per_core,
-        general.me_adaptive_floor_max_active_writers_per_core,
-        general.me_adaptive_floor_max_warm_writers_per_core,
-        general.me_adaptive_floor_max_active_writers_global,
-        general.me_adaptive_floor_max_warm_writers_global,
-        general.hardswap,
-        general.me_pool_drain_ttl_secs,
-        general.me_pool_drain_threshold,
-        general.effective_me_pool_force_close_secs(),
-        general.me_pool_min_fresh_ratio,
-        general.me_hardswap_warmup_delay_min_ms,
-        general.me_hardswap_warmup_delay_max_ms,
-        general.me_hardswap_warmup_extra_passes,
-        general.me_hardswap_warmup_pass_backoff_base_ms,
-        general.me_bind_stale_mode,
-        general.me_bind_stale_ttl_secs,
-        general.me_secret_atomic_snapshot,
-        general.me_deterministic_writer_sort,
-        general.me_writer_pick_mode,
-        general.me_writer_pick_sample_size,
-        MeSocksKdfPolicy::default(),
-        general.me_writer_cmd_channel_capacity,
-        general.me_route_channel_capacity,
-        general.me_route_backpressure_base_timeout_ms,
-        general.me_route_backpressure_high_timeout_ms,
-        general.me_route_backpressure_high_watermark_pct,
-        general.me_reader_route_data_wait_ms,
-        general.me_health_interval_ms_unhealthy,
-        general.me_health_interval_ms_healthy,
-        general.me_warn_rate_limit_ms,
-        general.me_route_no_writer_mode,
-        general.me_route_no_writer_wait_ms,
-        general.me_route_inline_recovery_attempts,
-        general.me_route_inline_recovery_wait_ms,
-    );
-
-    (pool, rng)
-}
-
-async fn insert_writer(
-    pool: &Arc<MePool>,
-    writer_id: u64,
-    writer_dc: i32,
-    addr: SocketAddr,
-    register_in_registry: bool,
-) -> mpsc::Receiver<WriterCommand> {
-    let (tx, rx) = mpsc::channel::<WriterCommand>(8);
-    let writer = MeWriter {
-        id: writer_id,
-        addr,
-        source_ip: addr.ip(),
-        writer_dc,
-        generation: pool.current_generation(),
-        contour: Arc::new(AtomicU8::new(WriterContour::Active.as_u8())),
-        created_at: Instant::now(),
-        tx: tx.clone(),
-        cancel: CancellationToken::new(),
-        degraded: Arc::new(AtomicBool::new(false)),
-        rtt_ema_ms_x10: Arc::new(AtomicU32::new(0)),
-        draining: Arc::new(AtomicBool::new(false)),
-        draining_started_at_epoch_secs: Arc::new(AtomicU64::new(0)),
-        drain_deadline_epoch_secs: Arc::new(AtomicU64::new(0)),
-        allow_drain_fallback: Arc::new(AtomicBool::new(false)),
-    };
-
-    pool.writers.write().await.push(writer);
-    {
-        let mut map = pool.proxy_map_v4.write().await;
-        map.entry(writer_dc)
-            .or_insert_with(Vec::new)
-            .push((addr.ip(), addr.port()));
-    }
-    pool.rebuild_endpoint_dc_map().await;
-    if register_in_registry {
-        pool.registry.register_writer(writer_id, tx).await;
-    }
-    rx
-}
-
-async fn recv_data_count(rx: &mut mpsc::Receiver<WriterCommand>, budget: Duration) -> usize {
-    let start = Instant::now();
-    let mut data_count = 0usize;
-    while Instant::now().duration_since(start) < budget {
-        let remaining = budget.saturating_sub(Instant::now().duration_since(start));
-        match tokio::time::timeout(remaining.min(Duration::from_millis(10)), rx.recv()).await {
-            Ok(Some(WriterCommand::Data(_))) => data_count += 1,
-            Ok(Some(WriterCommand::DataAndFlush(_))) => data_count += 1,
-            Ok(Some(WriterCommand::Close)) => {}
-            Ok(None) => break,
-            Err(_) => break,
-        }
-    }
-    data_count
-}
-
-#[tokio::test]
-async fn send_proxy_req_does_not_replay_when_first_bind_commit_fails() {
-    let (pool, _rng) = make_pool().await;
-    pool.rr.store(0, Ordering::Relaxed);
-
-    let (conn_id, _rx) = pool.registry.register().await;
-    let mut stale_rx = insert_writer(
-        &pool,
-        10,
-        2,
-        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 10)), 443),
-        false,
-    )
-    .await;
-    let mut live_rx = insert_writer(
-        &pool,
-        11,
-        2,
-        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 11)), 443),
-        true,
-    )
-    .await;
-
-    let result = pool
-        .send_proxy_req(
-            conn_id,
-            2,
-            SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 30000),
-            SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443),
-            b"hello",
-            0,
-            None,
-        )
-        .await;
-
-    assert!(result.is_ok());
-    assert_eq!(recv_data_count(&mut stale_rx, Duration::from_millis(50)).await, 0);
-    assert_eq!(recv_data_count(&mut live_rx, Duration::from_millis(50)).await, 1);
-
-    let bound = pool.registry.get_writer(conn_id).await;
-    assert!(bound.is_some());
-    assert_eq!(bound.expect("writer should be bound").writer_id, 11);
-}
-
-#[tokio::test]
-async fn send_proxy_req_prunes_iterative_stale_bind_failures_without_data_replay() {
-    let (pool, _rng) = make_pool().await;
-    pool.rr.store(0, Ordering::Relaxed);
-
-    let (conn_id, _rx) = pool.registry.register().await;
-
-    let mut stale_rx_1 = insert_writer(
-        &pool,
-        21,
-        2,
-        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 1, 21)), 443),
-        false,
-    )
-    .await;
-    let mut stale_rx_2 = insert_writer(
-        &pool,
-        22,
-        2,
-        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 1, 22)), 443),
-        false,
-    )
-    .await;
-    let mut live_rx = insert_writer(
-        &pool,
-        23,
-        2,
-        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 1, 23)), 443),
-        true,
-    )
-    .await;
-
-    let result = pool
-        .send_proxy_req(
-            conn_id,
-            2,
-            SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 30001),
-            SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), 443),
-            b"storm",
-            0,
-            None,
-        )
-        .await;
-
-    assert!(result.is_ok());
-    assert_eq!(recv_data_count(&mut stale_rx_1, Duration::from_millis(50)).await, 0);
-    assert_eq!(recv_data_count(&mut stale_rx_2, Duration::from_millis(50)).await, 0);
-    assert_eq!(recv_data_count(&mut live_rx, Duration::from_millis(50)).await, 1);
-
-    let writers = pool.writers.read().await;
-    let writer_ids = writers.iter().map(|w| w.id).collect::<Vec<_>>();
-    drop(writers);
-    assert_eq!(writer_ids, vec![23]);
-}
@@ -11,6 +11,8 @@ use tokio::net::TcpStream;
 use socket2::{Socket, TcpKeepalive, Domain, Type, Protocol};
 use tracing::debug;

+const DEFAULT_SOCKET_BUFFER_BYTES: usize = 256 * 1024;
+
 /// Configure TCP socket with recommended settings for proxy use
 #[allow(dead_code)]
 pub fn configure_tcp_socket(
@@ -34,10 +36,10 @@ pub fn configure_tcp_socket(
        
        socket.set_tcp_keepalive(&keepalive)?;
    }
-    
-    // CHANGED: Removed manual buffer size setting (was 256KB).
-    // Allowing the OS kernel to handle TCP window scaling (Autotuning) is critical
-    // for mobile clients to avoid bufferbloat and stalled connections during uploads.
+
+    // Use explicit baseline buffers to reduce slow-start stalls on high RTT links.
+    socket.set_recv_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;
+    socket.set_send_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;
    
    Ok(())
 }
@@ -62,6 +64,10 @@ pub fn configure_client_socket(
    let keepalive = keepalive.with_interval(Duration::from_secs(keepalive_secs));
    
    socket.set_tcp_keepalive(&keepalive)?;
+
+    // Keep explicit baseline buffers for predictable throughput across busy hosts.
+    socket.set_recv_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;
+    socket.set_send_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;
    
    // Set TCP user timeout (Linux only)
    // NOTE: iOS does not support TCP_USER_TIMEOUT - application-level timeout 
@@ -124,6 +130,8 @@ pub fn create_outgoing_socket_bound(addr: SocketAddr, bind_addr: Option<IpAddr>)
    
    // Disable Nagle
    socket.set_nodelay(true)?;
+    socket.set_recv_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;
+    socket.set_send_buffer_size(DEFAULT_SOCKET_BUFFER_BYTES)?;

    if let Some(bind_ip) = bind_addr {
        let bind_sock_addr = SocketAddr::new(bind_ip, 0);
@@ -0,0 +1,728 @@
+"""
+Telemt Control API Python Client
+Full-coverage client for https://github.com/telemt/telemt
+
+Usage:
+    client = TelemtAPI("http://127.0.0.1:9091", auth_header="your-secret")
+    client.health()
+    client.create_user("alice", max_tcp_conns=10)
+    client.patch_user("alice", data_quota_bytes=1_000_000_000)
+    client.delete_user("alice")
+"""
+
+from __future__ import annotations
+
+import json
+import secrets
+from dataclasses import dataclass, field
+from typing import Any, Dict, List, Optional, Union
+from urllib.error import HTTPError, URLError
+from urllib.request import Request, urlopen
+
+
+# ---------------------------------------------------------------------------
+# Exceptions
+# ---------------------------------------------------------------------------
+
+class TememtAPIError(Exception):
+    """Raised when the API returns an error envelope or a transport error."""
+
+    def __init__(self, message: str, code: str | None = None,
+                 http_status: int | None = None, request_id: int | None = None):
+        super().__init__(message)
+        self.code = code
+        self.http_status = http_status
+        self.request_id = request_id
+
+    def __repr__(self) -> str:
+        return (f"TememtAPIError(message={str(self)!r}, code={self.code!r}, "
+                f"http_status={self.http_status}, request_id={self.request_id})")
+
+
+# ---------------------------------------------------------------------------
+# Response wrapper
+# ---------------------------------------------------------------------------
+
+@dataclass
+class APIResponse:
+    """Wraps a successful API response envelope."""
+    ok: bool
+    data: Any
+    revision: str | None = None
+
+    def __repr__(self) -> str:  # pragma: no cover
+        return f"APIResponse(ok={self.ok}, revision={self.revision!r}, data={self.data!r})"
+
+
+# ---------------------------------------------------------------------------
+# Main client
+# ---------------------------------------------------------------------------
+
+class TememtAPI:
+    """
+    HTTP client for the Telemt Control API.
+
+    Parameters
+    ----------
+    base_url:
+        Scheme + host + port, e.g. ``"http://127.0.0.1:9091"``.
+        Trailing slash is stripped automatically.
+    auth_header:
+        Exact value for the ``Authorization`` header.
+        Leave *None* when ``auth_header`` is not configured server-side.
+    timeout:
+        Socket timeout in seconds for every request (default 10).
+    """
+
+    def __init__(
+        self,
+        base_url: str = "http://127.0.0.1:9091",
+        auth_header: str | None = None,
+        timeout: int = 10,
+    ) -> None:
+        self.base_url = base_url.rstrip("/")
+        self.auth_header = auth_header
+        self.timeout = timeout
+
+    # ------------------------------------------------------------------
+    # Low-level HTTP helpers
+    # ------------------------------------------------------------------
+
+    def _headers(self, extra: dict | None = None) -> dict:
+        h = {"Content-Type": "application/json; charset=utf-8",
+             "Accept": "application/json"}
+        if self.auth_header:
+            h["Authorization"] = self.auth_header
+        if extra:
+            h.update(extra)
+        return h
+
+    def _request(
+        self,
+        method: str,
+        path: str,
+        body: dict | None = None,
+        if_match: str | None = None,
+        query: dict | None = None,
+    ) -> APIResponse:
+        url = self.base_url + path
+        if query:
+            qs = "&".join(f"{k}={v}" for k, v in query.items())
+            url = f"{url}?{qs}"
+
+        raw_body: bytes | None = None
+        if body is not None:
+            raw_body = json.dumps(body).encode()
+
+        extra_headers: dict = {}
+        if if_match is not None:
+            extra_headers["If-Match"] = if_match
+
+        req = Request(
+            url,
+            data=raw_body,
+            headers=self._headers(extra_headers),
+            method=method,
+        )
+
+        try:
+            with urlopen(req, timeout=self.timeout) as resp:
+                payload = json.loads(resp.read())
+        except HTTPError as exc:
+            raw = exc.read()
+            try:
+                payload = json.loads(raw)
+            except Exception:
+                raise TememtAPIError(
+                    str(exc), http_status=exc.code
+                ) from exc
+            err = payload.get("error", {})
+            raise TememtAPIError(
+                err.get("message", str(exc)),
+                code=err.get("code"),
+                http_status=exc.code,
+                request_id=payload.get("request_id"),
+            ) from exc
+        except URLError as exc:
+            raise TememtAPIError(str(exc)) from exc
+
+        if not payload.get("ok"):
+            err = payload.get("error", {})
+            raise TememtAPIError(
+                err.get("message", "unknown error"),
+                code=err.get("code"),
+                request_id=payload.get("request_id"),
+            )
+
+        return APIResponse(
+            ok=True,
+            data=payload.get("data"),
+            revision=payload.get("revision"),
+        )
+
+    def _get(self, path: str, query: dict | None = None) -> APIResponse:
+        return self._request("GET", path, query=query)
+
+    def _post(self, path: str, body: dict | None = None,
+              if_match: str | None = None) -> APIResponse:
+        return self._request("POST", path, body=body, if_match=if_match)
+
+    def _patch(self, path: str, body: dict,
+               if_match: str | None = None) -> APIResponse:
+        return self._request("PATCH", path, body=body, if_match=if_match)
+
+    def _delete(self, path: str, if_match: str | None = None) -> APIResponse:
+        return self._request("DELETE", path, if_match=if_match)
+
+    # ------------------------------------------------------------------
+    # Health & system
+    # ------------------------------------------------------------------
+
+    def health(self) -> APIResponse:
+        """GET /v1/health — liveness probe."""
+        return self._get("/v1/health")
+
+    def system_info(self) -> APIResponse:
+        """GET /v1/system/info — binary version, uptime, config hash."""
+        return self._get("/v1/system/info")
+
+    # ------------------------------------------------------------------
+    # Runtime gates & initialization
+    # ------------------------------------------------------------------
+
+    def runtime_gates(self) -> APIResponse:
+        """GET /v1/runtime/gates — admission gates and startup progress."""
+        return self._get("/v1/runtime/gates")
+
+    def runtime_initialization(self) -> APIResponse:
+        """GET /v1/runtime/initialization — detailed startup timeline."""
+        return self._get("/v1/runtime/initialization")
+
+    # ------------------------------------------------------------------
+    # Limits & security
+    # ------------------------------------------------------------------
+
+    def limits_effective(self) -> APIResponse:
+        """GET /v1/limits/effective — effective timeout/upstream/ME limits."""
+        return self._get("/v1/limits/effective")
+
+    def security_posture(self) -> APIResponse:
+        """GET /v1/security/posture — API auth, telemetry, log-level summary."""
+        return self._get("/v1/security/posture")
+
+    def security_whitelist(self) -> APIResponse:
+        """GET /v1/security/whitelist — current IP whitelist CIDRs."""
+        return self._get("/v1/security/whitelist")
+
+    # ------------------------------------------------------------------
+    # Stats
+    # ------------------------------------------------------------------
+
+    def stats_summary(self) -> APIResponse:
+        """GET /v1/stats/summary — uptime, connection totals, user count."""
+        return self._get("/v1/stats/summary")
+
+    def stats_zero_all(self) -> APIResponse:
+        """GET /v1/stats/zero/all — zero-cost counters (core, upstream, ME, pool, desync)."""
+        return self._get("/v1/stats/zero/all")
+
+    def stats_upstreams(self) -> APIResponse:
+        """GET /v1/stats/upstreams — upstream health + zero counters."""
+        return self._get("/v1/stats/upstreams")
+
+    def stats_minimal_all(self) -> APIResponse:
+        """GET /v1/stats/minimal/all — ME writers + DC snapshot (requires minimal_runtime_enabled)."""
+        return self._get("/v1/stats/minimal/all")
+
+    def stats_me_writers(self) -> APIResponse:
+        """GET /v1/stats/me-writers — per-writer ME status (requires minimal_runtime_enabled)."""
+        return self._get("/v1/stats/me-writers")
+
+    def stats_dcs(self) -> APIResponse:
+        """GET /v1/stats/dcs — per-DC coverage and writer counts (requires minimal_runtime_enabled)."""
+        return self._get("/v1/stats/dcs")
+
+    # ------------------------------------------------------------------
+    # Runtime deep-dive
+    # ------------------------------------------------------------------
+
+    def runtime_me_pool_state(self) -> APIResponse:
+        """GET /v1/runtime/me_pool_state — ME pool generation/writer/refill snapshot."""
+        return self._get("/v1/runtime/me_pool_state")
+
+    def runtime_me_quality(self) -> APIResponse:
+        """GET /v1/runtime/me_quality — ME KDF, route-drop, and per-DC RTT counters."""
+        return self._get("/v1/runtime/me_quality")
+
+    def runtime_upstream_quality(self) -> APIResponse:
+        """GET /v1/runtime/upstream_quality — per-upstream health, latency, DC preferences."""
+        return self._get("/v1/runtime/upstream_quality")
+
+    def runtime_nat_stun(self) -> APIResponse:
+        """GET /v1/runtime/nat_stun — NAT probe state, STUN servers, reflected IPs."""
+        return self._get("/v1/runtime/nat_stun")
+
+    def runtime_me_selftest(self) -> APIResponse:
+        """GET /v1/runtime/me-selftest — KDF/timeskew/IP/PID/BND health state."""
+        return self._get("/v1/runtime/me-selftest")
+
+    def runtime_connections_summary(self) -> APIResponse:
+        """GET /v1/runtime/connections/summary — live connection totals + top-N users (requires runtime_edge_enabled)."""
+        return self._get("/v1/runtime/connections/summary")
+
+    def runtime_events_recent(self, limit: int | None = None) -> APIResponse:
+        """GET /v1/runtime/events/recent — recent ring-buffer events (requires runtime_edge_enabled).
+
+        Parameters
+        ----------
+        limit:
+            Optional cap on returned events (1–1000, server default 50).
+        """
+        query = {"limit": str(limit)} if limit is not None else None
+        return self._get("/v1/runtime/events/recent", query=query)
+
+    # ------------------------------------------------------------------
+    # Users (read)
+    # ------------------------------------------------------------------
+
+    def list_users(self) -> APIResponse:
+        """GET /v1/users — list all users with connection/traffic info."""
+        return self._get("/v1/users")
+
+    def get_user(self, username: str) -> APIResponse:
+        """GET /v1/users/{username} — single user info."""
+        return self._get(f"/v1/users/{_safe(username)}")
+
+    # ------------------------------------------------------------------
+    # Users (write)
+    # ------------------------------------------------------------------
+
+    def create_user(
+        self,
+        username: str,
+        *,
+        secret: str | None = None,
+        user_ad_tag: str | None = None,
+        max_tcp_conns: int | None = None,
+        expiration_rfc3339: str | None = None,
+        data_quota_bytes: int | None = None,
+        max_unique_ips: int | None = None,
+        if_match: str | None = None,
+    ) -> APIResponse:
+        """POST /v1/users — create a new user.
+
+        Parameters
+        ----------
+        username:
+            ``[A-Za-z0-9_.-]``, length 1–64.
+        secret:
+            Exactly 32 hex chars. Auto-generated if omitted.
+        user_ad_tag:
+            Exactly 32 hex chars.
+        max_tcp_conns:
+            Per-user concurrent TCP limit.
+        expiration_rfc3339:
+            RFC3339 expiration timestamp, e.g. ``"2025-12-31T23:59:59Z"``.
+        data_quota_bytes:
+            Per-user traffic quota in bytes.
+        max_unique_ips:
+            Per-user unique source IP limit.
+        if_match:
+            Optional ``If-Match`` revision for optimistic concurrency.
+        """
+        body: Dict[str, Any] = {"username": username}
+        _opt(body, "secret", secret)
+        _opt(body, "user_ad_tag", user_ad_tag)
+        _opt(body, "max_tcp_conns", max_tcp_conns)
+        _opt(body, "expiration_rfc3339", expiration_rfc3339)
+        _opt(body, "data_quota_bytes", data_quota_bytes)
+        _opt(body, "max_unique_ips", max_unique_ips)
+        return self._post("/v1/users", body=body, if_match=if_match)
+
+    def patch_user(
+        self,
+        username: str,
+        *,
+        secret: str | None = None,
+        user_ad_tag: str | None = None,
+        max_tcp_conns: int | None = None,
+        expiration_rfc3339: str | None = None,
+        data_quota_bytes: int | None = None,
+        max_unique_ips: int | None = None,
+        if_match: str | None = None,
+    ) -> APIResponse:
+        """PATCH /v1/users/{username} — partial update; only provided fields change.
+
+        Parameters
+        ----------
+        username:
+            Existing username to update.
+        secret:
+            New secret (32 hex chars).
+        user_ad_tag:
+            New ad tag (32 hex chars).
+        max_tcp_conns:
+            New TCP concurrency limit.
+        expiration_rfc3339:
+            New expiration timestamp.
+        data_quota_bytes:
+            New quota in bytes.
+        max_unique_ips:
+            New unique IP limit.
+        if_match:
+            Optional ``If-Match`` revision.
+        """
+        body: Dict[str, Any] = {}
+        _opt(body, "secret", secret)
+        _opt(body, "user_ad_tag", user_ad_tag)
+        _opt(body, "max_tcp_conns", max_tcp_conns)
+        _opt(body, "expiration_rfc3339", expiration_rfc3339)
+        _opt(body, "data_quota_bytes", data_quota_bytes)
+        _opt(body, "max_unique_ips", max_unique_ips)
+        if not body:
+            raise ValueError("patch_user: at least one field must be provided")
+        return self._patch(f"/v1/users/{_safe(username)}", body=body,
+                           if_match=if_match)
+
+    def delete_user(
+        self,
+        username: str,
+        *,
+        if_match: str | None = None,
+    ) -> APIResponse:
+        """DELETE /v1/users/{username} — remove user; blocks deletion of last user.
+
+        Parameters
+        ----------
+        if_match:
+            Optional ``If-Match`` revision for optimistic concurrency.
+        """
+        return self._delete(f"/v1/users/{_safe(username)}", if_match=if_match)
+
+    # NOTE: POST /v1/users/{username}/rotate-secret currently returns 404
+    # in the route matcher (documented limitation). The method is provided
+    # for completeness and future compatibility.
+    def rotate_secret(
+        self,
+        username: str,
+        *,
+        secret: str | None = None,
+        if_match: str | None = None,
+    ) -> APIResponse:
+        """POST /v1/users/{username}/rotate-secret — rotate user secret.
+
+        .. warning::
+            This endpoint currently returns ``404 not_found`` in all released
+            versions (documented route matcher limitation). The method is
+            included for future compatibility.
+
+        Parameters
+        ----------
+        secret:
+            New secret (32 hex chars). Auto-generated if omitted.
+        """
+        body: Dict[str, Any] = {}
+        _opt(body, "secret", secret)
+        return self._post(f"/v1/users/{_safe(username)}/rotate-secret",
+                          body=body or None, if_match=if_match)
+
+    # ------------------------------------------------------------------
+    # Convenience helpers
+    # ------------------------------------------------------------------
+
+    @staticmethod
+    def generate_secret() -> str:
+        """Generate a random 32-character hex secret suitable for user creation."""
+        return secrets.token_hex(16)  # 16 bytes → 32 hex chars
+
+
+# ---------------------------------------------------------------------------
+# Internal helpers
+# ---------------------------------------------------------------------------
+
+def _safe(username: str) -> str:
+    """Minimal guard: reject obvious path-injection attempts."""
+    if "/" in username or "\\" in username:
+        raise ValueError(f"Invalid username: {username!r}")
+    return username
+
+
+def _opt(d: dict, key: str, value: Any) -> None:
+    """Add key to dict only when value is not None."""
+    if value is not None:
+        d[key] = value
+
+
+# ---------------------------------------------------------------------------
+# CLI
+# ---------------------------------------------------------------------------
+
+def _print(resp: APIResponse) -> None:
+    print(json.dumps(resp.data, indent=2))
+    if resp.revision:
+        print(f"# revision: {resp.revision}", flush=True)
+
+
+def _build_parser():
+    import argparse
+
+    p = argparse.ArgumentParser(
+        prog="telemt_api.py",
+        description="Telemt Control API CLI",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog="""
+COMMANDS (read)
+  health                          Liveness check
+  info                            System info (version, uptime, config hash)
+  status                          Runtime gates + startup progress
+  init                            Runtime initialization timeline
+  limits                          Effective limits (timeouts, upstream, ME)
+  posture                         Security posture summary
+  whitelist                       IP whitelist entries
+  summary                         Stats summary (conns, uptime, users)
+  zero                            Zero-cost counters (core/upstream/ME/pool/desync)
+  upstreams                       Upstream health + zero counters
+  minimal                         ME writers + DC snapshot  [minimal_runtime_enabled]
+  me-writers                      Per-writer ME status      [minimal_runtime_enabled]
+  dcs                             Per-DC coverage           [minimal_runtime_enabled]
+  me-pool                         ME pool generation/writer/refill snapshot
+  me-quality                      ME KDF, route-drops, per-DC RTT
+  upstream-quality                Per-upstream health + latency
+  nat-stun                        NAT probe state + STUN servers
+  me-selftest                     KDF/timeskew/IP/PID/BND health
+  connections                     Live connection totals + top-N  [runtime_edge_enabled]
+  events [--limit N]              Recent ring-buffer events       [runtime_edge_enabled]
+
+COMMANDS (users)
+  users                           List all users
+  user <username>                 Get single user
+  create <username> [OPTIONS]     Create user
+  patch  <username> [OPTIONS]     Partial update user
+  delete <username>               Delete user
+  secret <username> [--secret S]  Rotate secret (reserved; returns 404 in current release)
+  gen-secret                      Print a random 32-hex secret and exit
+
+USER OPTIONS (for create / patch)
+  --secret S          32 hex chars
+  --ad-tag S          32 hex chars (ad tag)
+  --max-conns N       Max concurrent TCP connections
+  --expires DATETIME  RFC3339 expiration (e.g. 2026-12-31T23:59:59Z)
+  --quota N           Data quota in bytes
+  --max-ips N         Max unique source IPs
+
+EXAMPLES
+  telemt_api.py health
+  telemt_api.py -u http://10.0.0.1:9091 -a mysecret users
+  telemt_api.py create alice --max-conns 5 --quota 10000000000
+  telemt_api.py patch  alice --expires 2027-01-01T00:00:00Z
+  telemt_api.py delete alice
+  telemt_api.py events --limit 20
+        """,
+    )
+
+    p.add_argument("-u", "--url", default="http://127.0.0.1:9091",
+                   metavar="URL", help="API base URL (default: http://127.0.0.1:9091)")
+    p.add_argument("-a", "--auth", default=None, metavar="TOKEN",
+                   help="Authorization header value")
+    p.add_argument("-t", "--timeout", type=int, default=10, metavar="SEC",
+                   help="Request timeout in seconds (default: 10)")
+
+    p.add_argument("command", nargs="?", default="help",
+                   help="Command to run (see COMMANDS below)")
+    p.add_argument("arg", nargs="?", default=None, metavar="USERNAME",
+                   help="Username for user commands")
+
+    # user create/patch fields
+    p.add_argument("--secret",    default=None)
+    p.add_argument("--ad-tag",    dest="ad_tag", default=None)
+    p.add_argument("--max-conns", dest="max_conns", type=int, default=None)
+    p.add_argument("--expires",   default=None)
+    p.add_argument("--quota",     type=int, default=None)
+    p.add_argument("--max-ips",   dest="max_ips", type=int, default=None)
+
+    # events
+    p.add_argument("--limit", type=int, default=None,
+                   help="Max events for `events` command")
+
+    # optimistic concurrency
+    p.add_argument("--if-match", dest="if_match", default=None,
+                   metavar="REVISION", help="If-Match revision header")
+
+    return p
+
+
+if __name__ == "__main__":
+    import sys
+
+    parser = _build_parser()
+    args = parser.parse_args()
+
+    cmd = (args.command or "help").lower()
+
+    if cmd in ("help", "--help"):
+        parser.print_help()
+        sys.exit(0)
+
+    if cmd == "gen-secret":
+        print(TememtAPI.generate_secret())
+        sys.exit(0)
+
+    api = TememtAPI(args.url, auth_header=args.auth, timeout=args.timeout)
+
+    try:
+        # -- read endpoints --------------------------------------------------
+        if cmd == "health":
+            _print(api.health())
+
+        elif cmd == "info":
+            _print(api.system_info())
+
+        elif cmd == "status":
+            _print(api.runtime_gates())
+
+        elif cmd == "init":
+            _print(api.runtime_initialization())
+
+        elif cmd == "limits":
+            _print(api.limits_effective())
+
+        elif cmd == "posture":
+            _print(api.security_posture())
+
+        elif cmd == "whitelist":
+            _print(api.security_whitelist())
+
+        elif cmd == "summary":
+            _print(api.stats_summary())
+
+        elif cmd == "zero":
+            _print(api.stats_zero_all())
+
+        elif cmd == "upstreams":
+            _print(api.stats_upstreams())
+
+        elif cmd == "minimal":
+            _print(api.stats_minimal_all())
+
+        elif cmd == "me-writers":
+            _print(api.stats_me_writers())
+
+        elif cmd == "dcs":
+            _print(api.stats_dcs())
+
+        elif cmd == "me-pool":
+            _print(api.runtime_me_pool_state())
+
+        elif cmd == "me-quality":
+            _print(api.runtime_me_quality())
+
+        elif cmd == "upstream-quality":
+            _print(api.runtime_upstream_quality())
+
+        elif cmd == "nat-stun":
+            _print(api.runtime_nat_stun())
+
+        elif cmd == "me-selftest":
+            _print(api.runtime_me_selftest())
+
+        elif cmd == "connections":
+            _print(api.runtime_connections_summary())
+
+        elif cmd == "events":
+            _print(api.runtime_events_recent(limit=args.limit))
+
+        # -- user read -------------------------------------------------------
+        elif cmd == "users":
+            resp = api.list_users()
+            users = resp.data or []
+            if not users:
+                print("No users configured.")
+            else:
+                fmt = "{:<24} {:>7}  {:>14}  {}"
+                print(fmt.format("USERNAME", "CONNS", "OCTETS", "LINKS"))
+                print("-" * 72)
+                for u in users:
+                    links = (u.get("links") or {})
+                    all_links = (links.get("classic") or []) + \
+                                (links.get("secure") or []) + \
+                                (links.get("tls") or [])
+                    link_str = all_links[0] if all_links else "-"
+                    print(fmt.format(
+                        u["username"],
+                        u.get("current_connections", 0),
+                        u.get("total_octets", 0),
+                        link_str,
+                    ))
+            if resp.revision:
+                print(f"# revision: {resp.revision}")
+
+        elif cmd == "user":
+            if not args.arg:
+                parser.error("user command requires <username>")
+            _print(api.get_user(args.arg))
+
+        # -- user write ------------------------------------------------------
+        elif cmd == "create":
+            if not args.arg:
+                parser.error("create command requires <username>")
+            resp = api.create_user(
+                args.arg,
+                secret=args.secret,
+                user_ad_tag=args.ad_tag,
+                max_tcp_conns=args.max_conns,
+                expiration_rfc3339=args.expires,
+                data_quota_bytes=args.quota,
+                max_unique_ips=args.max_ips,
+                if_match=args.if_match,
+            )
+            d = resp.data or {}
+            print(f"Created: {d.get('user', {}).get('username')}")
+            print(f"Secret:  {d.get('secret')}")
+            links = (d.get("user") or {}).get("links") or {}
+            for kind, lst in links.items():
+                for link in (lst or []):
+                    print(f"Link ({kind}): {link}")
+            if resp.revision:
+                print(f"# revision: {resp.revision}")
+
+        elif cmd == "patch":
+            if not args.arg:
+                parser.error("patch command requires <username>")
+            if not any([args.secret, args.ad_tag, args.max_conns,
+                        args.expires, args.quota, args.max_ips]):
+                parser.error("patch requires at least one field (--secret, --max-conns, --expires, --quota, --max-ips, --ad-tag)")
+            _print(api.patch_user(
+                args.arg,
+                secret=args.secret,
+                user_ad_tag=args.ad_tag,
+                max_tcp_conns=args.max_conns,
+                expiration_rfc3339=args.expires,
+                data_quota_bytes=args.quota,
+                max_unique_ips=args.max_ips,
+                if_match=args.if_match,
+            ))
+
+        elif cmd == "delete":
+            if not args.arg:
+                parser.error("delete command requires <username>")
+            resp = api.delete_user(args.arg, if_match=args.if_match)
+            print(f"Deleted: {resp.data}")
+            if resp.revision:
+                print(f"# revision: {resp.revision}")
+
+        elif cmd == "secret":
+            if not args.arg:
+                parser.error("secret command requires <username>")
+            _print(api.rotate_secret(args.arg, secret=args.secret,
+                                     if_match=args.if_match))
+
+        else:
+            print(f"Unknown command: {cmd!r}\nRun with 'help' to see available commands.",
+                  file=sys.stderr)
+            sys.exit(1)
+
+    except TememtAPIError as exc:
+        print(f"API error [{exc.http_status}] {exc.code}: {exc}", file=sys.stderr)
+        sys.exit(1)
+    except KeyboardInterrupt:
+        sys.exit(130)
@@ -1165,6 +1165,60 @@ zabbix_export:
              tags:
                - tag: Application
                  value: 'Users connections'
+          graph_prototypes:
+            - uuid: 4199de3dcea943d8a1ec62dc297b2e9f
+              name: 'User {#TELEMT_USER}: Connections'
+              graph_items:
+                - color: 1A7C11
+                  item:
+                    host: Telemt
+                    key: 'telemt.active_conn_[{#TELEMT_USER}]'
+                - color: F63100
+                  sortorder: '1'
+                  item:
+                    host: Telemt
+                    key: 'telemt.total_conn_[{#TELEMT_USER}]'
+            - uuid: 84b8f22d891e49768891f497cac12fb3
+              name: 'User {#TELEMT_USER}: IPs'
+              graph_items:
+                - color: 0080FF
+                  item:
+                    host: Telemt
+                    key: 'telemt.ips_current_[{#TELEMT_USER}]'
+                - color: FF8000
+                  sortorder: '1'
+                  item:
+                    host: Telemt
+                    key: 'telemt.ips_limit_[{#TELEMT_USER}]'
+                - color: AA00FF
+                  sortorder: '2'
+                  item:
+                    host: Telemt
+                    key: 'telemt.ips_utilization_[{#TELEMT_USER}]'
+            - uuid: 09dabe7125114e36a6ce40788a7cb888
+              name: 'User {#TELEMT_USER}: Traffic'
+              graph_items:
+                - color: 00AA00
+                  item:
+                    host: Telemt
+                    key: 'telemt.octets_from_[{#TELEMT_USER}]'
+                - color: AA0000
+                  sortorder: '1'
+                  item:
+                    host: Telemt
+                    key: 'telemt.octets_to_[{#TELEMT_USER}]'
+            - uuid: 367f458962574b0ab3c02278a4cd7ecb
+              name: 'User {#TELEMT_USER}: Messages'
+              graph_items:
+                - color: 00AAFF
+                  item:
+                    host: Telemt
+                    key: 'telemt.msgs_from_[{#TELEMT_USER}]'
+                - color: FF5500
+                  sortorder: '1'
+                  item:
+                    host: Telemt
+                    key: 'telemt.msgs_to_[{#TELEMT_USER}]'
          master_item:
            key: telemt.prom_metrics
          lld_macro_paths:
@@ -1177,3 +1231,206 @@ zabbix_export:
      tags:
        - tag: target
          value: Telemt
+  graphs:
+    - uuid: f162658049ca4f50893c5cc02515ff10
+      name: 'Telemt: Server Connections Overview'
+      graph_items:
+        - color: 1A7C11
+          item:
+            host: Telemt
+            key: telemt.conn_total
+        - color: F63100
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.conn_bad_total
+        - color: FC6EA3
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.handshake_timeouts_total
+    - uuid: 759eca5e687142f19248f9d9343e1adf
+      name: 'Telemt: Uptime'
+      graph_items:
+        - color: 0080FF
+          item:
+            host: Telemt
+            key: telemt.uptime
+    - uuid: 0a27dbd0490d4a508c03ed39fa18545d
+      name: 'Telemt: ME Keepalive'
+      graph_items:
+        - color: 1A7C11
+          item:
+            host: Telemt
+            key: telemt.me_keepalive_sent_total
+        - color: 00AA00
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_keepalive_pong_total
+        - color: F63100
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.me_keepalive_failed_total
+        - color: FF8000
+          sortorder: '3'
+          item:
+            host: Telemt
+            key: telemt.me_keepalive_timeout_total
+    - uuid: 4015e24ff70b49f484e884d1dde687c0
+      name: 'Telemt: ME Reconnects'
+      graph_items:
+        - color: 0080FF
+          item:
+            host: Telemt
+            key: telemt.me_reconnect_attempts_total
+        - color: 1A7C11
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_reconnect_success_total
+    - uuid: f3e3eeb0663c471aa26cf4b6872b0c50
+      name: 'Telemt: ME Route Drops'
+      graph_items:
+        - color: F63100
+          item:
+            host: Telemt
+            key: telemt.me_route_drop_channel_closed_total
+        - color: FF8000
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_route_drop_no_conn_total
+        - color: AA00FF
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.me_route_drop_queue_full_total
+    - uuid: 49b51ed78a5943bdbd6d1d34fe28bf61
+      name: 'Telemt: ME Writer Pool'
+      graph_items:
+        - color: 0080FF
+          item:
+            host: Telemt
+            key: telemt.pool_drain_active
+        - color: F63100
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.pool_force_close_total
+        - color: FF8000
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.pool_stale_pick_total
+        - color: 1A7C11
+          sortorder: '3'
+          item:
+            host: Telemt
+            key: telemt.pool_swap_total
+    - uuid: a0779e6c979f4c1ab7ac4da7123a5ecb
+      name: 'Telemt: ME Writer Removals and Restores'
+      graph_items:
+        - color: F63100
+          item:
+            host: Telemt
+            key: telemt.me_writer_removed_total
+        - color: FF8000
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_writer_removed_unexpected_total
+        - color: FFAA00
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.me_writer_removed_unexpected_minus_restored_total
+        - color: 1A7C11
+          sortorder: '3'
+          item:
+            host: Telemt
+            key: telemt.me_writer_restored_same_endpoint_total
+        - color: 00AA00
+          sortorder: '4'
+          item:
+            host: Telemt
+            key: telemt.me_writer_restored_fallback_total
+    - uuid: 4fead70290664953b026a228108bee0e
+      name: 'Telemt: Desync Detections'
+      graph_items:
+        - color: F63100
+          item:
+            host: Telemt
+            key: telemt.desync_total
+        - color: 1A7C11
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.desync_full_logged_total
+        - color: FF8000
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.desync_suppressed_total
+    - uuid: 9f8c9f48cb534a66ac21b1bba1acb602
+      name: 'Telemt: Upstream Connect Cycles'
+      graph_items:
+        - color: 0080FF
+          item:
+            host: Telemt
+            key: telemt.upstream_connect_attempt_total
+        - color: 1A7C11
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.upstream_connect_success_total
+        - color: F63100
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.upstream_connect_fail_total
+        - color: FF8000
+          sortorder: '3'
+          item:
+            host: Telemt
+            key: telemt.upstream_connect_failfast_hard_error_total
+    - uuid: 05182057727547f8b8884b7e71e34f19
+      name: 'Telemt: ME Single-Endpoint Outages'
+      graph_items:
+        - color: F63100
+          item:
+            host: Telemt
+            key: telemt.me_single_endpoint_outage_enter_total
+        - color: 1A7C11
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_single_endpoint_outage_exit_total
+        - color: 0080FF
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.me_single_endpoint_outage_reconnect_attempt_total
+        - color: 00AA00
+          sortorder: '3'
+          item:
+            host: Telemt
+            key: telemt.me_single_endpoint_outage_reconnect_success_total
+    - uuid: 6892e8b7fbd2445d9ccc0574af58a354
+      name: 'Telemt: ME Refill Activity'
+      graph_items:
+        - color: 0080FF
+          item:
+            host: Telemt
+            key: telemt.me_refill_triggered_total
+        - color: F63100
+          sortorder: '1'
+          item:
+            host: Telemt
+            key: telemt.me_refill_failed_total
+        - color: FF8000
+          sortorder: '2'
+          item:
+            host: Telemt
+            key: telemt.me_refill_skipped_inflight_total
Author	SHA1	Message	Date
Alexey	67dc1e8d18	Merge pull request #498 from telemt/bump Update Cargo.toml	2026-03-19 18:25:14 +03:00
Alexey	ad8ada33c9	Update Cargo.toml	2026-03-19 18:24:01 +03:00
Alexey	bbb201b433	Instadrain + Hard-remove for long draining-state: merge pull request #497 from telemt/flow-stuck-writer Instadrain + Hard-remove for long draining-state	2026-03-19 18:23:38 +03:00
Alexey	8d1faece60	Instadrain + Hard-remove for long draining-state Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-19 17:45:17 +03:00
Alexey	a603505f90	Merge pull request #492 from temandroid/main fix(docker): expose port 9091 and allow external API access	2026-03-19 17:32:49 +03:00
Alexey	f8c42c324f	Merge pull request #494 from Dimasssss/patch-1 Update install.sh	2026-03-19 17:32:05 +03:00
Dimasssss	dc3363aa0d	Update install.sh	2026-03-19 16:23:32 +03:00
Alexey	f655924323	Update health.rs Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-19 16:15:00 +03:00
TEMAndroid	05c066c676	fix(docker): expose port 9091 and allow external API access Add 9091 port mapping to compose.yml to make the REST API reachable from outside the container. Previously only port 9090 (metrics) was published, making the documented curl commands non-functional. fixes #434	2026-03-19 15:54:01 +03:00
Alexey	1e000c2e7e	ME Writer stuck-up in draining-state fixes: merge pull request #491 from telemt/flow-stuck-writer ME Writer stuck-up in draining-state fixes	2026-03-19 14:44:43 +03:00
Alexey	fa17e719f6	Merge pull request #490 from telemt/bump Update Cargo.toml	2026-03-19 14:43:15 +03:00
Alexey	ae3ced8e7c	Update Cargo.toml	2026-03-19 14:42:59 +03:00
Alexey	3279f6d46a	Cleanup-path as non-blocking Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-19 14:07:20 +03:00
Alexey	6f9aef7bb4	ME Writer stuck-up in draining-state fixes Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-19 13:08:35 +03:00
Alexey	049db1196f	Merge pull request #487 from telemt/code-of-conduct Update CODE_OF_CONDUCT.md	2026-03-19 01:18:14 +03:00
Alexey	c8ffc23cf7	Update CODE_OF_CONDUCT.md	2026-03-19 01:18:02 +03:00
Alexey	f230f2ce0e	Merge pull request #486 from telemt/code-of-conduct Create CODE_OF_CONDUCT.md	2026-03-19 00:59:50 +03:00
Alexey	bdac6e3480	Create CODE_OF_CONDUCT.md	2026-03-19 00:59:37 +03:00
Alexey	a4e9746dc7	Merge pull request #485 from Dimasssss/patch-3 Update install.sh	2026-03-19 00:43:14 +03:00
Dimasssss	c47495d671	Update install.sh Вернул старый функционал + добавил новый: - Вернул автоматическое создание конфига с секретом - Вернул автоматическое создание службы - Добавил удаление службы и telemt через `install.sh uninstall` - Полное удаление вместе с конфигом через `install.sh --purge` - Добавил установку нужной версии `install.sh 3.3.15`	2026-03-19 00:36:02 +03:00
Alexey	5ae3a90d5e	Merge pull request #483 from Dimasssss/patch-1 Update CONFIG_PARAMS.en.md	2026-03-18 23:02:33 +03:00
Alexey	901a0b7c23	Runtime guardrails: merge pull request #484 from telemt/flow-runtime Runtime guardrails	2026-03-18 22:37:17 +03:00
Alexey	03891db0c9	Update Cargo.toml Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-18 22:36:33 +03:00
Alexey	89e5668c7e	Runtime guardrails Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-18 22:33:41 +03:00
Dimasssss	1935455256	Update CONFIG_PARAMS.en.md	2026-03-18 18:20:23 +03:00
Alexey	1544e3fcff	Merge pull request #481 from telemt/bump Update Cargo.toml	2026-03-18 13:58:39 +03:00
Alexey	85295a9961	Update Cargo.toml	2026-03-18 13:58:27 +03:00
Alexey	a54f807a45	Hot-Reload fixes: merge pull request #480 from telemt/flow-user Hot-Reload fixes	2026-03-18 13:57:58 +03:00
Alexey	31f6258c47	Hot-Reload fixes Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>	2026-03-18 13:54:59 +03:00
Alexey	30ba41eb47	Merge pull request #479 from telemt/bump Update Cargo.toml	2026-03-18 11:57:25 +03:00
Alexey	42f946f29e	Update Cargo.toml	2026-03-18 11:57:09 +03:00
Alexey	c53d7951b5	Merge pull request #468 from temandroid/main feat: add Telemt Control API Python simple client with CLI	2026-03-18 11:56:32 +03:00
Alexey	f36e264093	Merge pull request #477 from Dimasssss/CONFIG_PARAMS.md Create CONFIG_PARAMS.en.md	2026-03-18 11:56:17 +03:00
Alexey	a3bdf64353	ME Coverage Ratio in API + as Draining Factor: merge pull request #478 from telemt/flow-api ME Coverage Ratio in API + as Draining Factor	2026-03-18 11:56:01 +03:00
Alexey	2aa7ea5137	ME Coverage Ratio in API + as Draining Factor	2026-03-18 11:46:13 +03:00
Dimasssss	462c927da6	Create CONFIG_PARAMS.en.md	2026-03-18 10:53:09 +03:00
Alexey	cb87b2eac3	Adaptive Buffers + Session Eviction Method: merge pull request #475 from telemt/flow-buffers Adaptive Buffers + Session Eviction Method	2026-03-18 10:52:22 +03:00
Alexey	3739f38440	Adaptive Buffers + Session Eviction Method	2026-03-18 10:49:02 +03:00
TEMAndroid	8e96039a1c	Merge branch 'telemt:main' into main	2026-03-17 20:09:50 +03:00
TEMAndroid	36b360dfb6	feat: add Telemt Control API Python simple client with CLI Stdlib-only HTTP client covering all /v1 endpoints with argparse CLI. Supports If-Match concurrency, typed errors, user CRUD, and all runtime/stats routes. Usage: ./telemt_api.py help AI-Generated from API.md. Partially tested. Use with caution...	2026-03-17 20:09:36 +03:00
Alexey	5dd0c47f14	Merge pull request #464 from temandroid/patch-1 feat(zabbix): add graphs to Telemt template	2026-03-17 18:53:07 +03:00
TEMAndroid	4739083f57	feat(zabbix): add graphs to Telemt template - Add per-user graph prototypes (Connections, IPs, Traffic, Messages) - Add server-level graphs (Connections, Uptime, ME Keepalive, ME Reconnects, ME Route Drops, ME Writer Pool/Removals, Desync, Upstream, Refill)	2026-03-17 18:24:57 +03:00