What problem does it solve? Turning a written TDD plan into working, tested code requires disciplined sequencing, evidence tracking, and scope control. This Skill orchestrates that execution so plan items are implemented one batch at a time under Red-Green-Refactor discipline, with verified test evidence at every step. ## Core Features & Use Cases - Plan-driven execution: Resolves the authoritative plan file, confirms a green baseline, and works through items in order, appending discovered tests as new plan items. - Direct or delegated batches: Chooses per batch whether the parent implements small, clear work directly or dispatches isolated sub-agents for catalog-heavy or long-output work. - Evidence-based verification: Requires every cycle to report the exact command, test tier, and outcome, and runs the full suite at phase and plan milestones. - Use Case: After drafting a TDD plan for a new parser feature, reply "go" and the Skill implements each test item, runs the fast tier at every checkpoint, and finishes with a full-suite pass and a commit suggestion. ## Quick Start Use the implement skill to execute the TDD plan in .plans/ for the new feature and report the results.