Remove unused imports (F401) and duplicate/shadowed import
redefinitions (F811) across the codebase using ruff's safe
autofixes. No behavioral changes -- imports only.
- ~1400 safe autofixes applied across 644 files (net -1072 lines)
- __init__.py re-exports preserved (excluded from F401 removal so
public re-export surfaces stay intact)
- Re-exports that are imported or monkeypatched by tests but look
unused in their defining module are kept with explicit # noqa:
F401 (gateway/run.py load_dotenv; run_agent re-exports from
agent.message_sanitization, agent.context_compressor,
agent.retry_utils, agent.prompt_builder, agent.process_bootstrap,
agent.codex_responses_adapter)
- Unsafe F841 (unused-variable) fixes deliberately skipped -- those
can change behavior when the RHS has side effects
- ruff lints remain disabled in pyproject.toml (only PLW1514 is
selected); this is a one-time cleanup, not a config change
Verification:
- python -m compileall: clean
- pytest --collect-only: all 27161 tests collect (zero import errors)
- core entry points import clean (run_agent, model_tools, cli,
toolsets, hermes_state, batch_runner, gateway)
- static scan: every name any test imports directly from an edited
module still resolves
Two mitigations for the CLOSE_WAIT accumulation reported against QQ Bot
+ Feishu on macOS behind Cloudflare Warp.
1. Shared httpx.Limits helper (gateway/platforms/_http_client_limits.py).
Every long-lived platform adapter now constructs httpx.AsyncClient
with max_keepalive_connections=10 and keepalive_expiry=2.0, vs httpx's
default of unbounded keepalive pool and 5.0s expiry. On macOS/Warp the
default 5s window let idle keepalive sockets sit in CLOSE_WAIT long
enough for seven persistent adapters (QQ Bot, WeCom, DingTalk, Signal,
BlueBubbles, WeCom-callback, plus the transient Feishu helper) to
compound to the 256-fd ulimit. Tunable via
HERMES_GATEWAY_HTTPX_KEEPALIVE_EXPIRY and
HERMES_GATEWAY_HTTPX_MAX_KEEPALIVE env vars.
2. whatsapp.send_typing aiohttp leak. The call was
'await self._http_session.post(...)' with no 'async with' and no
variable capture — the ClientResponse went out of scope unclosed,
holding its TCP socket in CLOSE_WAIT until GC. Fixed by wrapping in
'async with'. This was the only bare-await aiohttp leak in the
gateway/tools/plugins tree per audit; all other aiohttp sites use
the context-manager pattern correctly.
The underlying reporter also saw Feishu SDK (lark-oapi) connections in
CLOSE_WAIT — those are inside the SDK and out of our direct control, but
tightening httpx keepalive across adapters reduces the aggregate pool
pressure regardless of which individual adapter leaks.
