Recover outstanding checks by querying provider attempt identity
After a restart, several attempts are marked dispatched but have no callback; immediate resubmission may duplicate costly work.
- Focused work estimate
- 5h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Reconciliation · Distributed failure
Estimated field mix
- Distributed systems60%
- Integrations40%
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 vendor portal runs format, policy and duplicate checks in parallel. A slow checker blocks completion, while duplicate callbacks can produce contradictory final summaries.
Setup prerequisites
- Create synthetic document identities and three fake check providers.
- No real risk scoring, hiring decisions or candidate execution is included.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- ABATCH-101 · Freeze the required check set when a document review run starts
- ABATCH-102 · Define pass, fail, unavailable and not-applicable check outcomes
- ABATCH-103 · Bound parallel check fan-out per organization and run
- ABATCH-104 · Dispatch each check through a durable deterministic attempt identity
- ABATCH-105 · Deduplicate callbacks without accepting contradictory check results
- ABATCH-106 · Finalize aggregates only from the frozen required check set
- ABATCH-107 · Apply a run deadline without rewriting late check facts
Acceptance criteria
- Reconcile each unresolved attempt through its provider identity.
- Redispatch only under the adapter's declared idempotency contract.
- Keep unknown provider state visible and bounded.
Implementation constraints
- Use fake providers that model lost callbacks and unavailable lookup.
Verification to include
- Recover a completed check whose callback was lost.
- Make provider lookup unavailable and verify no unsupported success or duplicate attempt.
Deliverables
- Outstanding-attempt reconciler
Rollout and recovery
Start recovery with bounded batches; suspend affected adapters when identity guarantees fail.
Value of the work
For the engineer: Practice fan-out/fan-in, deadline policies and immutable aggregation.
For the team: Review trustworthy partial-result handling and controllable parallel work.
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.