6f26d03c77
Adds the M9 purge re-materialization feature: a WAL-replay background
engine that rebuilds community cohort aggregates for a (user, community)
pair after retroactive signal purge, restoring ranking correctness without
modifying the immutable WAL.
Key additions:
- cohort::rematerialization module: PurgeJobQueue, RematerializationEngine,
WAL replay, atomic CohortSignalLedger swap, BLAKE3 audit log, metrics counters
- TidalDb::{submit_purge_job, purge_job_status, rematerialization_metrics}
public API (db/rematerialization.rs)
- Engine auto-starts in persistent mode; clean shutdown before WAL teardown
- 6 integration tests in tests/m9_purge_remat.rs covering ephemeral and
persistent modes, job lifecycle, and multi-job independence
- Split oversized files to comply with 600-line limit: db/mod.rs →
db/from_parts.rs, entities/revocation.rs → revocation/{mod,tests}.rs,
schema/validation/builders.rs → builders/{mod,tests}.rs,
signals/warm.rs → warm/{mod,tests,proptests}.rs
- Fix pre-existing bootstrap errors: export AuditKind from session module,
add overrides_rejected to SessionSnapshot deserialization
99 lines
3.0 KiB
YAML
99 lines
3.0 KiB
YAML
slug: m9-purge-rematerialization
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title: Re-materialization after Purge
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description: 'Background re-materialization engine: replay community WAL minus purged contributions, verify aggregate convergence, emit audit log'
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phase: merge
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created_at: 2026-03-03T06:29:37.999341Z
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updated_at: 2026-03-04T01:53:45.021789Z
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artifacts:
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- artifact_type: spec
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/spec.md
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created_at: 2026-03-04T01:49:14.154070Z
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approved_at: 2026-03-04T01:49:17.840490Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: design
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/design.md
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created_at: 2026-03-04T01:49:46.066669Z
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approved_at: 2026-03-04T01:49:51.894676Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: tasks
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/tasks.md
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created_at: 2026-03-04T01:50:20.613817Z
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approved_at: 2026-03-04T01:50:26.597303Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: qa_plan
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/qa-plan.md
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created_at: 2026-03-04T01:50:47.711899Z
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approved_at: 2026-03-04T01:50:51.630617Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: review
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/review.md
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created_at: 2026-03-04T01:51:51.761476Z
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approved_at: 2026-03-04T01:51:56.624236Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: audit
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/audit.md
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created_at: 2026-03-04T01:52:40.813915Z
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approved_at: 2026-03-04T01:52:44.714129Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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- artifact_type: qa_results
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status: approved
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path: .sdlc/features/m9-purge-rematerialization/qa-results.md
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created_at: 2026-03-04T01:53:41.072426Z
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approved_at: 2026-03-04T01:53:44.920277Z
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rejected_at: null
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rejection_reason: null
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approved_by: null
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tasks: []
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comments: []
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next_comment_seq: 0
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blockers: []
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phase_history:
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- phase: draft
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entered: 2026-03-03T06:29:37.999341Z
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exited: 2026-03-04T01:49:17.841078Z
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- phase: specified
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entered: 2026-03-04T01:49:17.841078Z
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exited: 2026-03-04T01:50:51.631219Z
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- phase: planned
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entered: 2026-03-04T01:50:51.631219Z
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exited: 2026-03-04T01:51:00.494211Z
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- phase: ready
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entered: 2026-03-04T01:51:00.494211Z
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exited: 2026-03-04T01:51:09.209106Z
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- phase: implementation
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entered: 2026-03-04T01:51:09.209106Z
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exited: 2026-03-04T01:51:56.628066Z
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- phase: review
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entered: 2026-03-04T01:51:56.628066Z
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exited: 2026-03-04T01:52:09.000248Z
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- phase: audit
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entered: 2026-03-04T01:52:09.000248Z
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exited: 2026-03-04T01:52:44.714865Z
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- phase: qa
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entered: 2026-03-04T01:52:44.714865Z
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exited: 2026-03-04T01:53:45.021789Z
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- phase: merge
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entered: 2026-03-04T01:53:45.021789Z
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exited: null
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dependencies: []
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archived: false
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schema_version: 3
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