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CLIVE-105 · Recover transport gaps

Return a reset contract when incident replay history expired

Practice briefTaskIntermediate

Old clients request a cursor outside retention and appear current with missing changes. Make replay expiry explicit.

Focused work estimate
2h 15m + prerequisites
Priority in the scenario
High
Engineering practice
Protocol design · Retention

Estimated field mix

  • API design50%
  • Real-time systems30%
  • Storage systems20%

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

  • Expired cursor requests fresh snapshot
  • Client clears old cursor
  • Reset has an observable reason

Implementation constraints

  • Do not silently start at the newest event.

Verification to include

  • Resume retained cursor
  • Resume expired cursor

Deliverables

  • Replay reset contract

Rollout and recovery

Require full reload if reset handling fails.

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.