docs(tasks): review-001 ws-pump-consolidation remediation complete

tasks/websocket/review-001-ws-pump-consolidation.md

@@ -1,7 +1,7 @@
 ---
 id: review-001-ws-pump-consolidation
 name: Dedupe pumps + byte-based caps + write-side validation (WS-11, WS-04, WS-05, WS-06, HY-09)
-status: pending
+status: completed
 depends_on: []
 scope: moderate
 risk: medium
@@ -36,12 +36,12 @@ instead of twice (axum path `:119-180`, tungstenite twin `:299-364`):
 
 ## Acceptance Criteria
 
-- [ ] Pump bodies factored into one generic implementation (both paths share it)
+- [x] Pump bodies factored into one generic implementation (both paths share it)
-- [ ] Write-side rejects `len > MAX_CHUNK_LEN` with a stream error (test); no `8 + len` overflow path
+- [x] Write-side rejects `len > MAX_CHUNK_LEN` with a stream error (test); no `8 + len` overflow path
-- [ ] Write `pending` byte-capped; inbound message/frame size explicitly configured (tests)
+- [x] Write `pending` byte-capped; inbound message/frame size explicitly configured (tests)
-- [ ] Tungstenite path exercised by the shared test suite (COV-03 backfilled)
+- [x] Tungstenite path exercised by the shared test suite (COV-03 backfilled)
-- [ ] 16 MiB round-trip and disconnect-cleanup tests still pass
+- [x] 16 MiB round-trip and disconnect-cleanup tests still pass
-- [ ] `cargo test` and `cargo clippy --all-targets -- -D warnings` pass
+- [x] `cargo test` and `cargo clippy --all-targets -- -D warnings` pass
 
 ## References
 
@@ -55,4 +55,40 @@ instead of twice (axum path `:119-180`, tungstenite twin `:299-364`):
 
 ## Summary
 
-> Filled on completion.
+Restructured `src/websocket/byte_adapter.rs` in three commits:
+
+- **WS-04/HY-09 (5024d99):** the write-side chunk parser validates the
+  8-byte header's length field against alkcall's `MAX_CHUNK_LEN`
+  (re-exported as `alkhttp::websocket::MAX_CHUNK_LEN`) with saturating
+  `8 + len`. Oversized header → the pump closes the socket (1011) and
+  signals the `AsyncWrite` half through a one-shot error channel, so
+  `poll_write` fails loudly (`InvalidData`, "chunk length exceeds
+  MAX_CHUNK_LEN") instead of silently waiting toward ~4 GiB. Tested on
+  the tungstenite path over a raw duplex pair.
+- **WS-05/WS-06 (92cc11a):** `pending` is byte-capped at
+  `PENDING_BUFFER_CAP` (= `MAX_CHUNK_LEN + 8`, checked pre-extend and
+  post-parse; a smaller "e.g. 1 MiB" cap false-positives because the
+  alkcall mux passes each payload up to 16 MiB as one `AsyncWrite`
+  call — the cap is the exact bound well-framed traffic can occupy).
+  Both pumps fail loudly on breach. Inbound caps
+  `INBOUND_WS_MESSAGE_CAP`/`INBOUND_WS_FRAME_CAP` (both 1 MiB) set on
+  the axum upgrade (`max_message_size`/`max_frame_size`) and the
+  tungstenite dial (`connect_async_with_config`+`WebSocketConfig`);
+  frame cap = message cap because the path does not use WS
+  fragmentation and tungstenite rejects a single oversize frame before
+  reassembly. A read-task inbound error surfaces a 1011 close to the
+  peer + stream error (tested).
+- **WS-11/COV-03 (1db0ea8 + e9ddf94):** one generic implementation
+  ([`WsFraming`] trait + `run_read_pump`/`run_write_pump`) with two
+  flavor impls (axum/tungstenite); the EOF watch mechanism, `read_eof`
+  receiver, and from_wss monitor unchanged. Six byte-adapter unit
+  tests now exercise the tungstenite path directly (WS-04, WS-05,
+  well-framed passthrough, binary read, EOF retention, text→1002);
+  the shared ws_upgrade_session/ws_overlay_ops/from_wss suites cover
+  both paths end-to-end.
+
+Verification per commit: `cargo test`, `cargo clippy --all-targets --
+-D warnings`; final also `cargo test --all-features`, `cargo clippy
+--all-features --all-targets -- -D warnings`, `cargo fmt --check` —
+all green, including the 16 MiB round-trip and disconnect-cleanup
+tests.