The live_gui subprocess spawns the desktop GUI, which creates AppController
with defer_warmup=True (src/gui_2.py:318). Warmup is deferred until the first
frame is painted (src/gui_2.py:1076). The previous test queried
/api/warmup_canaries immediately after wait_for_server, racing against the
first frame - canary list was empty until start_warmup() ran.
Replace the immediate assert with a poll-with-retry loop (15s deadline,
0.5s interval) per workflow.md 'Async Setters Need Poll-For-State' rule.
Adds a canary record for each module submitted to the warmup, tracking:
canary_id, module, thread_name, thread_id, submit_ts, start_ts,
end_ts, elapsed_ms, status, error.
Surface:
- WarmupManager.canaries() returns list[dict] (defensive copy)
- AppController.warmup_canaries() returns list[dict] (delegation)
- GET /api/warmup_canaries Hook API endpoint
- ApiHookClient.get_warmup_canaries() returns list[dict]
Example: the warmup of google.genai records a 1187ms canary on
thread controller-io_0 with thread_id 50420, canary_id 1.
11 new tests (8 unit in test_warmup_canaries + 3 in test_api_hooks_warmup).
All pass; live_gui smoke test confirms endpoint returns real data.
Sub-track 3 of startup_speedup_20260606. Builds on the Phase 7 minimal
work at b464d1fe which only added warmup_status to /api/gui/diagnostics.
New dedicated endpoints:
- GET /api/warmup_status -> controller.warmup_status() (cheap, lock-guarded)
- GET /api/warmup_wait?timeout=N -> controller.wait_for_warmup(timeout)
then returns the final status. Default 30s.
Both callable from external clients via ApiHookClient.get_warmup_status()
and ApiHookClient.get_warmup_wait(timeout=30.0).
7 new tests in tests/test_api_hooks_warmup.py (5 unit + 2 live_gui).
All 7 pass.
ed