What problem does it solve? Turning a raw requirement into a consistent, trackable implementation plan is error-prone: plans end up in inconsistent formats, lack verification steps, and lose traceability to tickets and branches. This Skill standardizes plan creation so every plan follows the same frontmatter contract and includes a hard verification path. ## Core Features & Use Cases - Standardized plan files: Writes plans to workspace/plans/ with date-and-slug filenames and a strict YAML frontmatter contract (id, slug, status, type, branch, worktree, verification tier). - Hard verification built in: Every plan must include a Playwright CLI test path with assertions, plus ordered implementation steps and explicit constraints and non-goals. - Traceability: Sequential PLAN_NNN ids, predecessor/successor links, and ticket references keep plans connected to the rest of the workflow. - Use Case: You receive a requirement to add a new feature to the Mirror app. Invoke this Skill to research the current state, allocate the next plan id, and produce a complete plan file with E2E verification steps, then open it in Greyboard for review. ## Quick Start Ask the assistant to plan this requirement and write an implementation plan for it before any code is written.