What problem does it solve? Turning a written implementation plan into working, tested code is error-prone: steps get skipped, tests are written after the fact, and the link between requirements and code is lost. This Skill automates the full implementation pipeline from plan.md to tested, documented code with enforced traceability. ## Core Features & Use Cases - Plan-driven execution: Reads spec.md, plan.md, constitution, and stack files, then executes each plan step through a blocking Step Gate with persistent progress.md checkpoints and --resume support. - Strict TDD and review gates: Enforces RED-GREEN-REFACTOR with resolved test commands, dispatches steps to implementer/spec-reviewer/code-quality-reviewer sub-agents, and requires @spec anchors linking every FR to source code. - Visual and Penflow gates: Captures Playwright visual baselines for UI features, validates Penflow UI contracts, and blocks completion until the visual gate passes. - Use Case: After running /spec-plan for a notifications feature, invoke /spec-implement to generate migrations, API endpoints, UI components, and tests step by step, producing implementation.md that maps every FR/AC to code anchors. ## Quick Start Ask the AI to run /spec-implement for your planned feature, for example by saying: implement the 005-notifications feature from its plan with tests and spec anchors.
