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pingqiuandClaude Opus 4.6
cae07c0bf1
M2 milestone: bounded summary-driven active Loop 2 runtime. Loop 2 runtime session (loop2_runtime.go): - Loop2RuntimeSession: primary-led active observation of replica set - ObserveOnce: collects replica summaries via transport seam, evaluates runtime mode (keepup / catching_up / degraded / needs_rebuild) - Fail-closed severity escalation: mode only degrades, never reverts - Detection: epoch mismatch, barrier failure, peer behind primary, recovery in progress, needs_rebuild sticky Runtime manager integration: - NewLoop2RuntimeSession, ObserveLoop2, LastLoop2Snapshot, Loop2Snapshot - Runtime manager now retains active Loop 2 snapshots alongside failover Tests prove three paths: - healthy replica set → keepup - peer behind → catching_up - peer needs_rebuild → needs_rebuild (fail-closed) Phase 18 docs updated: M2 delivered, M3 next. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>