What problem does it solve? Turning an approved spec or ticket into shipped code often drifts in scope, skips tests, or ends without verification evidence. This Skill enforces a disciplined implementation loop so every acceptance criterion is coded, tested, and reviewed before being called done. ## Core Features & Use Cases - Contract-driven implementation: Loads spec acceptance criteria or ticket briefs as the source of truth and flags scope drift immediately. - TDD at agreed seams: Runs red-green-refactor per acceptance criterion with test seams confirmed before the first test is written. - Verification and review gates: Requires typecheck, targeted tests, and a code review pass on the diff, with a structured completion report recording exact commands and results. - Use Case: You have an agent-ready ticket to add a coupon API endpoint. The Skill walks you through confirming scope, writing failing tests per AC, implementing in dependency order, running pytest and typecheck, and producing a PR-ready completion report. ## Quick Start Ask the agent to implement ticket T-102 from the spec using TDD and produce a completion report with verification commands.
