Use Problem Details for versioned validation failures
Partners parse changing human messages to detect invalid warehouse filters.
- Focused work estimate
- 2h 30m + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Error design
Estimated field mix
- API design80%
- Security20%
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 inventory platform must replace a legacy availability response. Existing partners upgrade on different schedules, and the team needs a versioned transition.
Setup prerequisites
- Create two local API versions and synthetic partner clients with different upgrade schedules; no real partner traffic.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Publish stable problem types and field paths.
- Keep instance and request identifiers safe.
- Version any materially changed error semantics.
Implementation constraints
- Exclude stack traces and internal database details.
Verification to include
- Validate a malformed filter in both versions.
- Verify cross-tenant denial reveals no private identifiers.
Deliverables
- Error contract examples.
Rollout and recovery
Add structured fields compatibly and document client handling.
Value of the work
For the engineer: Practice public-contract design, compatible evolution, and client lifecycle management.
For the team: Provide a predictable migration that keeps supported integrations inspectable and recoverable.
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.