v0.19.2

[0.19.2] - 2026-08-31

Added

• Event architecture Phase 0-1: fact pipeline + opencode cutover (#739, #740, #743). Introduces @squadrant/core's own event-tracking module — an AgentFact vocabulary, per-agent FactAdapter seam, a LifecycleSource facade wiring adapters to the pipeline, a flight-recorder ring buffer for post-hoc debugging, and a pure fact-to-ControlEvent mapping layer with an adapter conformance test suite. Ships invariant checks I1–I3 (depth-based tool-call pairing) and I4–I6 (trust, unknown-rate, and liveness-disagreement). opencode is moved onto the fact pipeline via a FactAdapter reading SSE frames directly, retiring the old OpencodeControlSource; claude stays on its existing path (shadow only) per the approved design. A generated ControlEvent producer/consumer table plus a --check gate now catches producer/consumer drift at build time.

Fixed

• False "First turn not delivered" warning + duplicate first-turn re-send (#745). crew spawn's own screen-scrape confirmation could time out even when the first turn genuinely landed, because the crew's UserPromptSubmit hook confirms delivery to the daemon independently of — and can outrace — that scrape. Hook confirmation is now raced against the scrape for the scrape's own full timeout window and treated as primary, not a post-failure fallback: a scrape failure alone no longer concludes non-delivery when the hook already confirmed. As defense in depth, crew send now refuses to re-send the exact original task text once delivery is confirmed, closing the double-run scenario where following the (previously false) warning's guidance re-ran the task a second time.
• Heal daemon false-FAIL on the plist-drift race (#741, #742). squadrant heal daemon could report a failed restart even when the daemon had actually come back up cleanly, racing its own plist-drift detection against the just-completed restart. Fixed at the source of the race rather than papering over it with a retry.
• Opencode fact-pipeline perf regression and event-index cache-miss fallback (#743). A per-frame performance regression in the new opencode adapter (introduced during Phase 0-1 development) is fixed before shipping; chatty opencode frames are filtered, resolve() is TTL-cached, and dead snapshot state is removed. The eventsTaskIndex now falls back to a live store lookup on a cache miss instead of losing the event.

Notes

• Phase 2 (per-crew FactLog cleanup, claude shadow-mode cutover, lifecycle refinement) is deliberately deferred — not part of this release.
• First opencode crew after upgrade should be watched for event-pipeline health (I5 invariant floods, subagent-orchestrating crews' known ~2 CREW IDLE per task).