17.0.0 (2026-06-18)
⚠ BREAKING CHANGES
- SUBAGENT_EVENTS.ACTIVITY ("subagents:activity") is removed. It was never emitted, so no consumer could act on it, and there is no replacement — the activity tier was removed in Phase 18. Consumers should subscribe to the now-declared FAILED, COMPACTED, CREATED, and STEERED channels instead.