Serialize membership removal with privileged order approval
A buyer is removed from a partner while their order-approval request is between authorization and commit. The current implementation commits the approval after removal without a defined policy.
- Focused work estimate
- 5h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Transactional authorization · Concurrency · Revocation semantics · Audit integrity
Estimated field mix
- Security50%
- Database engineering50%
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 manufacturing company shares purchase-order documents with partner organizations. Buyers, partner administrators, and read-only agents use the same API. Recent support reports suggest list filters and background downloads disagree about who may see an order.
Setup prerequisites
- HTTP APIs
- Session authentication
- Tenant-scoped data access
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- ACCESS-101 · Write the partner permission matrix from existing routes
- ACCESS-102 · Remove partner scope from client-controlled list filters
- ACCESS-103 · Make bulk order updates all-or-nothing across authorization checks
- ACCESS-106 · Narrow integration keys to the permissions they were issued
- ACCESS-108 · Invalidate cached permissions after a role downgrade
- ACCESS-104 · Stop a document lookup from revealing foreign filenames
- ACCESS-109 · Record useful access-denial audits without copying documents
Acceptance criteria
- Declare the transactional ordering rule for removal and approval.
- Reconcile authority revision within the privileged write transaction so one ordering is enforced.
- Keep successful approvals and rejected stale authority attempts separately auditable.
Implementation constraints
- A second controller check does not close the race; prove the service/database boundary controls it.
Verification to include
- Commit approval before removal under the declared ordering and inspect attribution.
- Commit removal first while approval is paused and assert no unauthorized order mutation.
Deliverables
- Authority/write serialization design and deterministic interleaving tests
Rollout and recovery
Apply the rule to order approvals before broader privileged writes; retain audit records through application rollback.
Value of the work
For the engineer: Practice authorization as a service-level invariant, including revocation timing, concurrent membership changes, and asynchronous data delivery.
For the team: Inspect a concrete record of cross-organization denial, least-privilege decisions, and access-recovery behavior using fictional partner records.
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.