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pingqiuandClaude Opus 4.6
d2d57851b0
Rebuild session protocol implementation for v2-rebuild-mvp-session-protocol.md. New files: - rebuild_bitmap.go: RebuildBitmap — session-scoped dense bitset for WAL-applied LBA tracking. MarkApplied on local WAL write (not receive). ShouldApplyBase returns false for WAL-covered LBAs (WAL always wins). - rebuild_session.go: RebuildSession — replica-side two-line rebuild. WAL lane (ApplyWALEntry) + base lane (ApplyBaseBlock) with bitmap conflict resolution. TryComplete requires BOTH base_complete AND wal_applied_lsn >= target_lsn. Volume-level control surface: StartRebuildSession, ApplyRebuildSessionWALEntry/BaseBlock, MarkRebuildSessionBaseComplete, TryCompleteRebuildSession, CancelRebuildSession, ActiveRebuildSession. - rebuild_mvp_test.go: 4 correctness tests — base+WAL converge, WAL-applied never overwritten by base, bitmap set on applied not received, control surface start/supersede/complete. - rebuild_transport_test.go: 2 transport-level tests — two-line with real WAL shipping, live writes during base copy with bitmap conflict. Design docs: - v2-rebuild-mvp-session-protocol.md: MVP spec with message set, apply rules, completion/failure/crash rules, test matrix - v2-sync-recovery-protocol.md: full protocol context (keepup/catchup/ rebuild unified design, primary decision logic, two-line model) - v2-session-protocol-shape.md: protocol shape overview Protocol engine (reference, not production): - sw-block/protocol/: 7-event engine with ~300 lines, 13 tests 6 rebuild tests pass, all existing component tests pass. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>