Optimize listing

Read at each step

A store with no file here: work from its own docs and say the report has no checked notes for it.

Steps

1. Fix the scope. The listing refs, the target prompts and the competitors. With no live listing, name the submit-plugin skill and stop. Done when each is named or the user has declined it.
2. Pull. The listing and its versions, its ranks, the category's top listings, and recent rewrites among the competitors and the category's top, per compare.md. Done when every competitor's current copy is in hand.
3. Pick words. Done when each candidate word has its top results read or a stated gap, and each target word has a field.
4. Compare. Field by field. Done when every field has a verdict, keep or change, and the listings behind it.
5. Rewrite. Paste-ready copy with its character count against the store's limit, its target file and the cost of the change, clear of the store file's preflight. Done when every change verdict has copy, citing its listings.
6. Report. The copy by field, biggest change first, the word table, the current ranks as a dated baseline, then this line: 'No study yet shows that rewrites move ranks.' If .agents/plugin-stack.md exists, add optimize-listing: <today>, top fix: <fix> under Runs without asking, in your own words. Done when every number has its date and basis.