Fix arhitectural general (beneficiu și pentru text adapters), nu doar voice.
src/claude_session.py:
- _session_locks: dict[str, threading.Lock] cu bootstrap lock pentru
lazy creation thread-safe.
- _get_session_lock(channel_id) helper.
- send_message() body wrapped în with _get_session_lock(channel_id).
- threading.Lock (NU asyncio.Lock) — send_message e sync subprocess.run
blocking; asyncio.Lock nu protejează cod sync rulat via to_thread.
- Per-channel granularity preserved — different channels run în paralel.
- send_message() public signature unchanged.
src/router.py:
- route_message(): dacă adapter_name == "discord-voice", prepend
[speaker:<user_name>] prefix (Config.get("voice.user_name", "user")).
- Original text variable left untouched for downstream paths.
- Text adapters: zero behavior change.
- route_message() public signature unchanged.
tests/test_claude_session_mutex.py — 6 tests REGRESSION-CRITICAL:
- same channel serializes (concurrent → mutex serializes, no overlap)
- same channel lock identity (same dict entry per channel_id)
- different channels run in parallel (overlap MUST fire)
- 3 channels all overlap
- contested acquire blocks then proceeds (policy: blocking, not fail-fast)
- lock released on subprocess exception (no deadlock on crash)
Acquisition policy: BLOCKING acquire bound by claude --timeout (5min default)
nu fail-fast — adapters already serialize via asyncio.to_thread queue, un
non-blocking acquire ar surface transient busy errors.
Test results: 82 passed (51 existing + 31 new). 2 PRE-EXISTING failures în
TestPromptInjectionProtection (stale assertion vs current prompt text) —
out of scope, recomand ticket separat.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
