Define an immutable archive segment manifest
An exported audit file has no trusted count or content identity, so operators cannot tell whether a partial upload is complete.
- Focused work estimate
- 3h 30m + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Integrity · Storage contracts
Estimated field mix
- Storage systems50%
- System design30%
- Security20%
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
A fictional procurement platform keeps append-only action records. Operators want fast recent search and affordable old records without losing provenance or leaking tenant data.
Setup prerequisites
- Create synthetic audit events and local storage/search adapters.
- Use an explicit fictional retention policy, not legal advice.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Manifest binds segment ID, record count, range and byte hash.
- Publish a segment only after verifying its stored identity.
- Retain original event identifiers across archival.
Implementation constraints
- Use canonical synthetic serialization and exact object versions.
Verification to include
- Archive and verify a complete segment.
- Truncate bytes or alter count and reject publication.
Deliverables
- Segment contract and integrity probe
Rollout and recovery
Prototype manifests alongside synthetic exports; keep unverified segments out of search.
Value of the work
For the engineer: Practice storage tradeoffs, provenance and data-lifecycle decisions.
For the team: Review archive cost and retrieval guarantees before committing to infrastructure.
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.