Define offline change envelopes with stable client operation IDs
A tablet retries saved edits with new request IDs, so the server creates duplicate inspection findings.
- Focused work estimate
- 1h 30m + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Protocol design · Idempotency
Estimated field mix
- Distributed systems50%
- API design30%
- 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.
Review it, then add it to your workspace.
The board opens an editable draft; nothing is saved until you confirm it. Sign-in and workspace permissions apply, and Demo boards remain ephemeral.
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
No earlier ticket is required. Complete the project setup above.
Acceptance criteria
- Include operation ID, inspection ID, base revision and change type.
- Keep device display name separate from identity.
- Reject unknown envelope versions before mutation.
Implementation constraints
- Use generated disposable client identities.
Verification to include
- Replay the same synthetic change envelope twice.
- Change content under the same operation ID and return conflict.
Deliverables
- Offline operation contract
Rollout and recovery
Publish the envelope before enabling sync retries; keep incompatible operations in local pending state.
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.