Stage a timeout revision for a named consumer cohort
The team wants to test a timeout change on background reports before affecting interactive requests.
- Focused work estimate
- 3h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Progressive delivery · Targeting
Estimated field mix
- Platform engineering100%
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 internal reporting platform changes feature and timeout settings through environment edits. Partial rollouts leave API and worker processes interpreting different values.
Setup prerequisites
- Create local API and worker configuration consumers.
- Use fabricated settings without secrets.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- ACONFIG-101 · Inventory runtime settings with owners and restart requirements
- ACONFIG-102 · Reject invalid timeout combinations as one configuration unit
- ACONFIG-103 · Define an immutable configuration snapshot envelope
- ACONFIG-104 · Atomically adopt a validated configuration snapshot in each process
- ACONFIG-105 · Publish configuration only against the revision reviewed by the operator
- ACONFIG-106 · Keep incompatible consumers on their last valid configuration
Acceptance criteria
- Bind cohort selection to stable nonpersonal service identity.
- Show intended and acknowledged revision per cohort.
- Unselected consumers retain their current target revision.
Implementation constraints
- Use deterministic synthetic cohort membership.
Verification to include
- Adopt a revision in the report-worker cohort only.
- Use an unknown cohort and reject publication without target changes.
Deliverables
- Cohort rollout command and targeting cases
Rollout and recovery
Begin with one synthetic cohort; restore its previous target revision on errors.
Value of the work
For the engineer: Practice configuration contracts, compatibility and failure recovery.
For the team: Review controlled configuration delivery with inspectable blast radius.
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.