Validate emulated display brightness and cache-limit settings
The gateway accepts negative cache capacity and brightness above the declared range. Add a bounded schema.
- Focused work estimate
- 1h 15m + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Validation · Configuration
Estimated field mix
- Embedded and edge80%
- API design20%
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 information-display gateways receive brightness schedules and cache limits. These settings affect only a software display emulator; no real devices, safety controls or customer data are used.
Setup prerequisites
- Define synthetic configuration schema and supported device capabilities.
- Implement local control-plane and gateway adapters with delayed messages.
Preceding work
No earlier ticket is required. Complete the project setup above.
Acceptance criteria
- Supported ranges pass
- Unknown fields reject
- Invalid settings do not alter active state
Implementation constraints
- Schema limits are emulator contracts, not hardware ratings.
Verification to include
- Apply valid fixture values
- Reject negative and oversized settings
Deliverables
- Configuration schema and cases
Rollout and recovery
Reject incoming updates if schema validation fails.
Value of the work
For the engineer: Practice desired/reported state, compatibility and rollback.
For the team: Inspect whether remote configuration preserves working settings through offline and partial outcomes.
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.