modernize-guidelisted

# Skill: modernize-guide The complete, canonical contract for this skill is the paste-prompt it wraps, inlined here — **follow it in full:** !`cat "${CLAUDE_SKILL_DIR}/prompt.md"` (If the block above came back empty or errored, read `prompt.md` in this skill folder — it sits beside this `SKILL.md` — and follow that.) As you follow it, adapt for the fact that you're a Claude Code skill, not a pasted prompt: - **You're already invoked** — skip its "How to use / paste this" preamble. The source doc to modernize is `$ARGUMENTS` below (plus any attached source files and real target code). Read the source yourself where you can. - **The deliverable is a plan + gap report** — produce it inline as your reply **and**, once settled, write the plan to **`guide/PLAN.md`** (creating the `guide/` folder). That single file is the only thing you write now — do **not** write the finished guide (that's `/scaffold-guide` then `/draft-milestone`). - Where the prompt hands off to another prompt by filename, use the sibling **skill** of the same name (`/draft-milestone`). Source to modernize: ``` $ARGUMENTS ``` **Gate:** stop and ask the user to approve the plan before any milestone is drafted.