Compare and Swap - #241
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davidabram
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Define the next build-out for durable mutation-cursor protocol state in the repository-scoped Agent Trace DB. The plan covers additive schema migration, explicit codecs, structural durable-transition projection, transactional CAS persistence, concurrency and restart coverage, and documentation. Plan: mutation-cursor-store-persistence (T01-T11) Co-authored-by: SCE <sce@crocoder.dev>
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Persist the verified mutation-cursor protocol in the repository database so later store operations have durable tables for worktrees, scopes, processed events, mutation events, and active scopes. Add migration 003 with strict revision BLOB checks, enum allow-lists, and payload-consistency constraints, and extend repository initialization tests with constraint coverage. Plan: mutation-cursor-store-persistence (T01) Co-authored-by: SCE <sce@crocoder.dev>
Persist mutation-trace domain values using stable, migration-aligned encodings before query and commit logic is added. Add big-endian revision codecs and explicit string codecs plus discriminant helpers, with rejection of invalid values and round-trip tests. Plan: mutation-cursor-store-persistence, T02 Co-authored-by: SCE <sce@crocoder.dev>
Use `(scope_id, event_id)` as the sole processed-event identity, matching `EventKey` and avoiding duplicate worktree ownership data. Remove the redundant column and index, and add a regression test covering the composite key. Plan: mutation-cursor-store-persistence (T01, T03) Co-authored-by: SCE <sce@crocoder.dev>
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Load one worktree's active and referenced scopes plus processed-event state without querying historical events on the hot path, and reconstruct cold-path mutation events with full attribution and boundary data. Preserve transient protocol fields as empty in widened projections and reject inconsistent persisted payloads. Plan: mutation-cursor-store-persistence (T03) Co-authored-by: SCE <sce@crocoder.dev>
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August 27, 2026 13:47
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