Protect retained document versions from blob cleanup
Cleanup counts only current document references and breaks retained versions. Include every retained reference authority.
- Focused work estimate
- 3h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Retention · Data modeling
Estimated field mix
- Storage systems60%
- Database engineering40%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional archive Moss deduplicates generated attachments across documents within each organization. Use local files and transactional metadata stubs.
Setup prerequisites
- Generate duplicate and unique local byte fixtures.
- Create synthetic document references across two organizations.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- CBLOB-101 · Separate attachment display names from blob identities
- CBLOB-102 · Scope blob deduplication to the owning organization
- CBLOB-103 · Reject references to incomplete synthetic blobs
- CBLOB-104 · Tombstone unreferenced blobs before physical deletion
- CBLOB-105 · Prevent a new blob reference racing with reclamation
- CBLOB-106 · Record physical blob deletion failures without claiming completion
- CBLOB-107 · Reconcile blob metadata after a crash during deletion
- CBLOB-108 · Bound blob reclamation scans by eligibility cursor
Acceptance criteria
- Retained versions preserve blobs
- Expired versions release references
- Cross-tenant records cannot affect counts
Implementation constraints
- Retention policy is a fixture contract, not a legal claim.
Verification to include
- Retain old version
- Expire it and inspect eligibility
Deliverables
- Version-aware reference accounting
Rollout and recovery
Pause cleanup until all reference sources reconcile.
Value of the work
For the engineer: Practice reclamation races and explicit data-lifecycle guarantees.
For the team: Inspect whether storage cleanup avoids broken references and hidden retention.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.