What problem does it solve? Turning a written engineering plan into actual code often goes wrong when steps are skipped, blockers are silently bypassed, or test failures are ignored. This Skill enforces methodical, user-in-the-loop execution of a PLAN.md so every step is announced, verified, and recorded. ## Core Features & Use Cases - Step-by-step execution: Reads the full PLAN.md, briefs the user, then implements one step at a time, pausing for confirmation between steps. - Blocker handling: Stops immediately on failing tests, missing files, ambiguous instructions, or contradictions with the codebase, and explains what is needed to proceed. - Structured reporting: Runs the test suite and writes an IMPLEMENTATION.md summarizing step status, files changed, test results, deviations, and open items. - Use Case: After a planning session produces PLAN.md for a new API endpoint, invoke this Skill to implement each step, verify with tests, and receive a final implementation report. ## Quick Start Say "implement the plan" after your PLAN.md is ready and confirm each step as it completes.