Apply live incident updates only to newer revisions
A delayed update reopens a resolved incident. Compare revisions before changing the projected card.
- Focused work estimate
- 2h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Ordering · Idempotency
Estimated field mix
- Real-time systems60%
- Distributed systems40%
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 internal status team Harbor updates operational incident cards. Build a local event log and SSE adapter; incidents and service names are invented.
Setup prerequisites
- Create synthetic incident revisions and a local append-only event stub.
- Provide controllable disconnect, replay and retention fixtures.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Newer revisions apply
- Equal replay is harmless
- Older revisions cannot overwrite
Implementation constraints
- Revision scope is per incident.
Verification to include
- Apply revisions in order
- Deliver earlier revision after resolution
Deliverables
- Revision projector and ordering cases
Rollout and recovery
Refresh full cards if ordering cannot be established.
Value of the work
For the engineer: Practice event projection, replay and freshness communication.
For the team: Inspect whether dashboards remain trustworthy through network interruptions.
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.