After /stop, the next user message can hit a stale generation token and
return with api_calls=0, no failure, no interruption. _normalize_empty_agent_response
fell through to an empty string, so the gateway logged "response=0 chars"
and sent nothing — the message was silently lost while internal work
sometimes continued.
Add the api_calls==0 / not-failed / not-interrupted / not-partial branch
to the single normalization chokepoint so the user gets a short retry hint
instead of silence. Regression test asserts the hint surfaces.
Salvaged from #33851 (re-applied on current main; original was 1401 commits
behind and the function had moved).
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
Fix three regressions introduced by PR #18370 (lazy session creation):
1. _finalize_session() uses stale session_key after compression (#20001)
2. session_key not synced after auto-compression in run_conversation (#20001)
3. pending_title ValueError leaves title wedged forever (#19029)
4. Gateway silently swallows null responses when agent did work (#18765)
5. One-time cleanup for accumulated ghost compression continuations (#20001)
Changes:
- tui_gateway/server.py: _finalize_session() now uses agent.session_id
(falls back to session_key when agent is None). Refactor
_sync_session_key_after_compress() with clear_pending_title and
restart_slash_worker policy flags. Call it post-run_conversation()
to sync session_key after auto-compression. Add ValueError handler
to pending_title flush.
- gateway/run.py: Extract _normalize_empty_agent_response() helper that
consolidates failed/partial/null response handling. Surfaces user-facing
error when agent did work (api_calls > 0) but returned no text.
- hermes_state.py: Add finalize_orphaned_compression_sessions() — marks
ghost continuation sessions as ended (non-destructive, preserves data).
- cli.py: One-time startup migration for orphaned compression sessions.
Test changes:
- tests/test_tui_gateway_server.py: Update pending_title ValueError test
for post-#18370 architecture (title applied post-message, not at create).
- tests/test_lazy_session_regressions.py: 14 new regression tests covering
all fixed paths.
