Undo only an uncontested stock change
A blind Undo would erase a colleague's newer stock value. Add one guarded inverse update.
- Focused work estimate
- 4h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Concurrency · Recovery
Estimated field mix
- Frontend50%
- API design50%
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 supplier Reedworks uses a browser inventory table. Quantities are planning records, not live warehouse instructions.
Setup prerequisites
- Create synthetic SKUs with revisions and nullable quantities.
- Implement a local paginated adapter with conditional updates.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Undo uses resulting revision
- Newer revisions reject undo
- Failure preserves current row
Implementation constraints
- Undo must be a conditional write.
Verification to include
- Undo an uncontested save
- Advance revision before undo
Deliverables
- Guarded undo and race case
Rollout and recovery
Hide Undo while retaining ordinary edits.
Value of the work
For the engineer: Practice grid interaction and concurrent edit recovery.
For the team: Inspect how changes protect operator intent during partial failures.
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.