Reconcile shipping acceptance before issuing a replacement label
The shipping adapter loses its response after accepting a label, and the workflow currently creates a replacement immediately.
- Focused work estimate
- 5h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Distributed failure · Reconciliation
Estimated field mix
- Integrations50%
- Distributed systems50%
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 equipment-rental service approves returns through several provider calls. Partial failures leave labels issued without inspections or refunds reported before provider confirmation.
Setup prerequisites
- Create synthetic return records and fake inspection, shipping and refund adapters.
- Use integer money values and no real payments or messages.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Query the original provider command identity before replacement.
- Record accepted, rejected and unresolved outcomes explicitly.
- Create a new generation only under a declared replacement rule.
Implementation constraints
- The fake adapter must model accepted-but-unacknowledged requests.
Verification to include
- Recover the original accepted label after a response loss.
- Make status unavailable and retain unresolved shipping without a second label.
Deliverables
- Shipping reconciliation and uncertainty probe
Rollout and recovery
Enable reconciled retries first; stop automatic replacement when provider identity lookup is unavailable.
Value of the work
For the engineer: Practice durable workflow state, compensation and uncertain outcomes.
For the team: Review recoverable business operations without assuming distributed transactions.
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.