Plan Skill

Purpose

Core principle: Write plans assuming the engineer has zero codebase context. Document everything they need: which files, what code, how to test, how to verify. No guessing.

Create or update specs/{feature}/plan.md as the execution source of truth, including technical context, key decisions, phased tasks, and completion conditions.

Input

• Existing specs/constitution.md when present
• specs/{feature}/spec.md

Output

• specs/{feature}/plan.md
• specs/{feature}/spec.md when backflow is required

Steps