Slim

Lighten what every session pays before its first word, and lose no rule. Resolve scripts/ from this skill's directory. Run each script with Bash run_in_background: true and read its output when it ends: a foreground Bash may run in another shell, without the session's CLAUDE_CONFIG_DIR or working directory. <work> is a new scratch folder for this run. Talk in the conversation language.

1. Weigh. node scripts/weigh.cjs --save <work>/before.json. Show its table: every file loaded at launch, its size and its share. An argument narrows the files to slim; the weighing stays whole.
2. Sort. Read each file and give every block one destination:
   • stays loaded: a rule every session needs, kept short;
   • skill: a procedure, or a block for one kind of task. It becomes skills/<name>/SKILL.md in the same scope (<config>/skills/ or <project>/.claude/skills/), its description saying when it applies;
   • paths: rule: a block that matters only for matching files. It loads after a matching Read, Write or Edit, and user-level patterns start from the session's working directory: a rule needed before any read stays loaded;
   • evidence: a dated citation, a date, the story of why. It moves word for word to evidence/<file>.md beside rules/ (<config>/evidence/ or <project>/.claude/evidence/), never inside rules/, where every .md loads. List the duplicates and contradictions between files too, each with both passages. Never edit MEMORY.md, nor a block a tool generates (the GitNexus block between its markers): weigh and report them only.
3. Show. File by file: what moves where, and each rewritten or removed sentence beside its original. Write nothing yet. Ask one question for the go; the user may validate some files and not others.
4. Save. node scripts/check.cjs save <work> <files to change>. Exit 2 names a file with changes not committed: stop there.
5. Write only what was validated. Move text word for word. Each validated rewrite or removal goes in <work>/rewrites.json as {"from": "<original>", "to": "<new, or empty>"}. Add once, to the CLAUDE.md of that scope, one line saying where its evidence lives.
6. Verify. node scripts/check.cjs verify <work> --in <evidence dir> --in <rules dir> --in <each new skill or rule> --rewrites <work>/rewrites.json. It puts back, as it was, any file with a piece found nowhere: report each lost piece in one line, and never write that file again another way.
7. Commit each changed file in the repository that holds it: one commit per file, with the evidence, skill or rule it fed, chore(rules): slim <file>. git revert undoes it. A file outside Git keeps its .slim.bak copy.
8. Weigh again. node scripts/weigh.cjs --compare <work>/before.json. Show before, after and the gain. Counts are estimates; /context in a fresh session gives the exact one. For stale references, suggest /doctor prompt-audit (Claude Code 2.1.283 or later) in one line.