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pingqiuandClaude Opus 4.6
cc8c529962
RetainedHistory as engine input: - RecordHandshakeFromHistory: sender-level API consuming RetainedHistory directly, returns RecoverabilityProof alongside outcome - SelectRebuildFromHistory: sender-level API consuming RetainedHistory for rebuild-source decision RebuildSourceDecision soundness: - Now requires BOTH trusted checkpoint AND replayable tail (CheckpointLSN >= TailLSN and CommittedLSN <= HeadLSN) - Trusted checkpoint with unreplayable tail falls back to full_base 4 new tests: - TrustedCheckpoint_UnreplayableTail (the regression case) - SenderDriven_CatchUp (history → proof → outcome → complete) - SenderDriven_Rebuild_SnapshotTail (history → source → rebuild) - SenderDriven_Rebuild_FallsBackToFullBase (unreplayable tail) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>