Tests did monkeypatch.setattr(<facade module>, name) where name is now defined in a
sibling module and the production path reads the sibling's binding. Where production
reads through BOTH bindings the setattr is duplicated onto the defining module (import
added next to the existing alias import); where only the sibling reads it the target is
repointed. Seams whose production readers go through the facade are left alone.
Review follow-up for the salvaged #79881/#63963 stack: the shutdown
interrupt fires exactly once, but work can materialize AFTER that one
shot on BOTH sibling paths:
- a /v1/runs task admitted before the drain populates
_active_run_agents only once _create_agent returns
(queued-before-agent window);
- a _running_agents entry claimed as _AGENT_PENDING_SENTINEL is
promoted to the real agent by track_agent() on its own schedule,
after the one-shot walk skipped the sentinel.
Either way the settle loop waited on work nothing signaled, and the
turn went straight to the post-interrupt tool-subprocess kill — the
exact amputation the fix exists to avoid, in a rarer window.
If any work is still live when the settle loop exits, re-invoke
_interrupt_running_agents (which already skips sentinels and folds in
the API-server helper) so late-materializing agents on either path get
the cooperative interrupt. Regression test drives the real stop() path
with an accelerated loop clock and asserts exactly two interrupt
signals.
The shutdown drain ACCOUNTS for API-server work but never INTERRUPTS it.
`_drain_active_agents()` folds `_active_api_run_count()` into both its wait
loop and its `timed_out` verdict, while `_interrupt_running_agents()` iterates
`self._running_agents` only -- a dict no API turn ever enters, because the
API server owns its own agent lifecycle. `gateway/run.py` states the gap
against itself: "API-server / desk sessions have the same structural gap
(#63529)."
The user-visible result is that every gateway restart with a live API or
desktop turn burns the full drain timeout and then runs
`_kill_tool_subprocesses("post-interrupt")`, which amputates the turn's tool
subprocesses with no cooperative interrupt and no resume marker.
There are seven API agent-entry points. Six funnel through `_run_agent()`
(both session-chat routes, and `/v1/chat/completions` + `/v1/responses` in
streaming and non-streaming form) and are counted by `_inflight_agent_runs`;
the seventh, `/v1/runs`, runs its own lifecycle and is counted through
`_active_run_tasks`. None of the six has a run_id, so the run_id-keyed
`_active_run_agents` cannot reach them, and only two pass `agent_ref` -- which
lands in a caller-local list, not a registry.
So register once at the single unconditional creation site inside
`_run_agent`, beside the existing `_publish_turn_process_ownership()` call,
and unregister in the same `finally` that already clears it. That one
symmetric pair covers all six callers. The registry is adapter-owned and
keyed by object identity, kept separate from `_active_run_agents` because
that dict is run_id-keyed and scoped to the public `/v1/runs` stop API.
`interrupt_active_runs()` then walks both registries, deduped by identity, so
the interrupt set matches the set the drain waits on. The settle window after
the interrupt now polls API work as well: the interrupt is cooperative, and
without this the window closes the instant `_running_agents` is empty -- which
it always is for API turns -- and the tool kill lands on a turn that was asked
to stop microseconds earlier.
Second, deeper pass over tools/gateway/hermes_cli plus first pass over
the trees wave 1 missed (acp, acp_adapter, skills, computer_use, docker,
dashboard, conformance, monitoring, secret_sources, hermes_state,
providers). Same rubric as wave 1 (AGENTS.md test policy); security,
alternation/caching invariants, issue-number regressions, and E2E kept.
Real test-quality fixes found and rooted out along the way:
- tests/tools/test_command_guards.py made real auxiliary-LLM HTTPS calls
(DEFAULT_CONFIG smart-approval leaked in) — pinned approval
mode=manual via autouse fixture: 17.4s → 0.4s.
- test_model_switch_custom_providers.py / test_user_providers_model_switch.py
silently probed live provider catalogs (~2s/test) — stubbed
cached_provider_model_ids/provider_model_ids/fetch_api_models.
- test_telegram_noise_filter.py: 15-platform copy-paste matrix over
shared gateway.run logic → 3 representative platforms (55s → 3.9s).
- test_gateway_shutdown.py: stop()'s 5s interrupt-deadline loop spun on
MagicMock agents — interrupt.side_effect now clears _running_agents
(22s → 1.0s).
- test_gateway_inactivity_timeout.py poll-harness timings shrunk 3-5x
(24s → 1.1s); test_mcp_stability.py backoff/SIGTERM-grace sleeps
patched (15.4s → 2.5s); test_async_delegation.py negative-drain wait
5s → 0.5s.
- test_telegram_init_deadline.py: loop-block margin restored to 1.0s
with rationale comment — the watchdog-dump assertion needs the loop
blocked well past deadline+grace under parallel load (flaked once in
the 40-worker verification run at a 0.2s margin).
Verification: full hermetic suite via scripts/run_tests.sh —
2,438 files, 21,718 tests passed, 0 failed, 293.9s wall.
Suite totals vs original baseline: 46,820 → 19,757 test functions
(−57.8%), wall 583.5s → 293.9s (−50%), subprocess CPU 13,564s → 11,623s.
Reserve API requests before their first await, include every drain-owned work type in runtime status, and pause local cron dispatch while a gateway drain is active.
Closes#63529
Root cause: GatewayRunner._drain_active_agents only waited on
_running_agents + cron in-flight counts. Desktop/API sessions are
tracked solely inside APIServerAdapter (_inflight_agent_runs +
_active_run_agents), so stop/restart logged active_at_start=0 and
systemd SIGKILL'd mid-tool work.
Fix: APIServerAdapter.active_agent_work_count() plus
GatewayRunner._active_api_run_count() folded into the drain wait,
status updates, timeout result, and shutdown logs — same pattern as
_active_cron_job_count for #60432.
Verification: pytest tests/gateway/test_api_server_active_work_drain.py
tests/gateway/test_cron_active_work_drain.py -q → 19 passed
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