Finalize offline attachments by verified content identity
An inspection references a photo before its interrupted upload completes, producing broken evidence links in the field report.
- Focused work estimate
- 3h 30m + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Storage integrity · Offline workflows
Estimated field mix
- Storage systems50%
- Distributed systems30%
- Mobile20%
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 field team inspects equipment with intermittent connectivity. Two tablets can edit the same checklist and an old upload may restore a deleted finding.
Setup prerequisites
- Create two local client-state simulators and a synthetic inspection API.
- Use fabricated notes and local attachment bytes.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- AMERGE-101 · Define offline change envelopes with stable client operation IDs
- AMERGE-102 · Require current inspection access before applying a queued offline change
- AMERGE-103 · Distinguish independent checklist edits from conflicting edits
- AMERGE-104 · Apply offline operations with a durable deduplication record
- AMERGE-105 · Preserve concurrent inspection findings as explicit conflicts
- AMERGE-107 · Keep deleted findings deleted when an old tablet reconnects
Acceptance criteria
- Stage attachment uploads separately from finding references.
- Finalize only exact verified object generation and content hash.
- Keep incomplete attachments visible as pending without public links.
Implementation constraints
- Use synthetic images or byte fixtures; no personal photographs are needed.
Verification to include
- Complete a valid synthetic attachment and resolve its stable identity.
- Interrupt upload or alter bytes and verify the finding cannot publish an invalid link.
Deliverables
- Attachment finalization contract
Rollout and recovery
Canary local attachments; keep staged objects private and resume or discard only exact generations.
Value of the work
For the engineer: Practice offline synchronization, causal revisions and conflict resolution.
For the team: Review whether field work survives disconnection without hiding conflicting observations.
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.