Slim a CLAUDE.md

CLAUDE.md loads in full on every session. Past roughly 200 lines it costs context on every request and reduces adherence, so instructions get ignored precisely because there are too many of them. This moves subsystem detail into .claude/rules/ files that load only when the matching files are opened, and proves the move lost nothing.

Scope: restructuring an existing file. Writing a CLAUDE.md from scratch is /init's job; auditing content quality against templates is what claude-md-management's claude-md-improver does.

Mechanics (load order, paths: syntax, the @import trap, /doctor, hierarchy) live in references/mechanics.md. Read the section you need when you need it.

Phase 1 — Measure

python "${CLAUDE_PLUGIN_ROOT}/skills/slim-claude-md/scripts/audit_claude_md.py" CLAUDE.md