A fresh state.db init (schema DDL, FTS tables, first config import)
measures ~300ms warm on a fast machine. The gateway constructs
GoalManager on the event-loop thread, and a cold cache ran that init
behind a 0.25s bootstrap grace window: on a slow CI box the /goal set
path's waits expired and save_goal silently no-oped — the reply said
"Goal set (7-turn budget)..." but nothing persisted, and a fresh
GoalManager read back no state (first assertion passes, second fails).
Two changes, one per caller shape:
- Async callers (_get_goal_manager_for_event,
_get_heartbeat_manager_for_event, _post_turn_goal_continuation, and
the heartbeat poller) warm the SessionDB cache off-loop through the
context-preserving executor before constructing the manager (shared
_warm_goals_session_db helper). The loop never blocks and the first
write lands at any init duration. A bare to_thread would lose the
per-turn profile home override under multiplex; the executor hop
keeps it (same pattern as the goal judge path).
- Sync callers (heartbeat persistence, _goal_still_active_for_session)
cannot await, so the bootstrap windows stay: the call that starts the
bootstrap waits a one-time init window (1.5s) instead of the short
per-call window (0.25s), giving healthy cold inits room to land while
a contended migration still degrades to None with only a bounded
one-time stall. The bootstrap thread binds the caller's home as a
contextvar override so a multiplexed worker cannot cache the default
profile's DB under another profile's key.
save_goal and heartbeat save_state now log at WARNING when they drop a
write, because the reply has already told the user the state was set.
Regression test pins the contract: init past the window, write
persists, loop gap under 2s (the flake-policy floor for wall-clock
bounds; the slow-init margin grew to match, so the test still tells
on-loop from off-loop).
Independent diagnosis + measurement by jackulau (#88965 review); the
off-loop warm-up shape follows their harness table. Simplify-code
review (4-agent) contributed the helper extraction and the poller
warm-up.
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