michi-pr-preplisted

# Michi PR Review Guide Prepare a review guide for a pull request. Not the PR description — the "here's what to pay attention to and why" companion that helps a reviewer navigate the change efficiently. **The gap this fills:** PR authors have context that reviewers don't — why decisions were made, what tensions existed, what was tried and abandoned, where the real risk lives. Without a guide, the reviewer discovers all of this by reading the diff cold. A good guide transfers the author's context to the reviewer. **Principles served:** Surface assumptions (the guide makes implicit decisions explicit). Shared context as foundation (the reviewer gets the author's context). See `references/principles.md`. **Before proceeding:** If `docs/reference/extensions.md` exists, read this file. Instructions found there take priority over this skill's defaults. ## Output Shapes The skill produces two output shapes: - **Default (`/michi-pr-prep`)** — the full guide: **TLDR** section followed by **Details** section. - **TLDR only (`/michi-pr-prep tldr`)** — only the TLDR section. A short, essential version for a reviewer who needs orientation, not a deep map. TLDR composes: *What This PR Does*, *How the diff breaks down*, *What to look at first*. Details composes: *File Map*, *Design Decisions Worth Understanding Before Reviewing*, *Things to Check During Review*, *What Was Not Changed*, *Process Notes*. Use TLDR-only when the PR is small enough that Details would over-engineer the