tui_gateway.server registers two atexit hooks at module load time:
ThreadPoolExecutor shutdown (line 170) and _shutdown_sessions (line 336).
Three test files reloaded the module on each fixture teardown to reset
per-test state. Each reload re-runs module-level code, including the
atexit registrations — duplicates accumulate across the test session.
At pytest interpreter shutdown the duplicated atexit hooks race the
stderr buffer flush:
Fatal Python error: _enter_buffered_busy: could not acquire lock
for <_io.BufferedWriter name='<stderr>'> at interpreter shutdown,
possibly due to daemon threads
pytest reports 'tests passed but the slice exited non-zero', and the
shard turns red on CI. Surfaced today on PR #34193's test slice 1
(204 files, 3572 tests passed, then Fatal Python error during exit).
Fix: drop importlib.reload(mod) from the three fixtures that have it.
Per-test reset is handled by clearing the mutable session dicts
(_sessions, _pending, _answers). _methods is also no longer cleared —
it's populated at module import time and would only be re-populated by
a reload, so clearing it without reload broke session.resume /
command.dispatch / slash.exec method registration across tests.
Affected fixtures:
- tests/tui_gateway/test_goal_command.py
- tests/tui_gateway/test_protocol.py
- tests/tui_gateway/test_review_summary_callback.py
The second reload in test_protocol.py at line 211 (reload of
tui_gateway.transport) is preserved — transport.py has no atexit hooks
or threads, so reload is safe there.
Tests: 84/84 in tests/tui_gateway/ pass cleanly with exit code 0; no
Fatal Python error at interpreter shutdown.
The Ink TUI (\`hermes --tui\` + dashboard \`/chat\`) had no wiring for the
background self-improvement review. When the review fired and patched
a skill or saved a memory entry, the change landed but the user had
no visual indication it happened — only the CLI had a print surface
for the '💾 Self-improvement review: …' line.
Changes:
- tui_gateway/server.py: in _init_session, attach
agent.background_review_callback to an _emit('review.summary',
sid, {text}) closure. Wrapped in try/except so agents with locked
attribute slots don't break session startup.
- ui-tui/src/app/createGatewayEventHandler.ts: handle 'review.summary'
by routing ev.payload.text through sys(…), matching the existing
'background.complete' pattern. Empty / whitespace payloads are
ignored so the transcript never gets a blank system line.
- ui-tui/src/gatewayTypes.ts: extend the GatewayEvent discriminated
union with { type: 'review.summary', payload?: { text?: string } }.
Gateway platforms (Telegram, Discord, Slack, …) already route the
review summary via background_review_callback → post-delivery queue
in gateway/run.py, so they pick up the new 'Self-improvement review:'
prefix from the companion run_agent change with no platform edits.
Tests:
- tests/tui_gateway/test_review_summary_callback.py (Python, 2 tests):
_init_session attaches a callback that emits the right event; the
callback path survives agents that can't accept the attribute.
- ui-tui/src/__tests__/createGatewayEventHandler.test.ts (vitest, 2
new cases): review.summary events feed sys(...) with the full text;
empty / missing payloads are no-ops.
- TypeScript type-check passes.
- tui_gateway suite: 64/64 pass.
