Optimise Claude

Audit AI instruction files for size, relevance, and structure. CLAUDE.md loads every session — bloated files cause Claude to ignore your actual instructions. SKILL.md lines cost tokens on every invocation. Keeping both lean reduces latency, cost, and instruction-following failures.

Scope

All operations scoped to project root ($PWD). Never modify files outside the repository.

When to Use

• CLAUDE.md is long and Claude ignores rules or asks questions already answered in it
• SKILL.md files exceed ~120 lines
• Frontmatter or section order is non-canonical
• Multiple skills contain duplicated content
• AGENTS.md has inline instruction blocks >30 lines that should be skills

Workflow

Run phases sequentially. Skip any that don't apply.

Phase 1 — Inventory & Triage

1. List every CLAUDE.md (root, parent dirs, child dirs), SKILL.md under .agents/skills/, and AGENTS.md
2. Record: file, line count, has frontmatter (y/n), canonical sections (y/n)
3. Flag violations per file type (see criteria below)
4. Output triage table sorted by line count descending

| File | Lines | Type | Violations |
|------|------:|------|------------|

Phase 2 — Audit CLAUDE.md

For each CLAUDE.md, apply the litmus test per line: "Would removing this cause Claude to make mistakes?" If not, cut it.

Keep:

• Bash commands Claude can't guess
• Code style rules that differ from defaults
• Testing instructions and preferred test runners
• Repo etiquette (branch naming, PR conventions)
• Architectural decisions specific to the project
• Dev environment quirks (required env vars)
• Common gotchas or non-obvious behaviors

Remove:

• Anything Claude can figure out by reading code
• Standard language conventions Claude already knows
• Detailed API docs (link instead)
• Information that changes frequently
• Long explanations or tutorials
• File-by-file codebase descriptions
• Self-evident practices like "write clean code"

Restructure:

• Migrate domain-specific workflows and on-demand knowledge to skills (SKILL.md)
• Split large CLAUDE.md using @path/to/import syntax for logical sections
• Use emphasis (IMPORTANT, YOU MUST) sparingly — only for rules Claude repeatedly violates
• If a rule is critical with zero exceptions, suggest converting to a hook instead

Phase 3 — Reduce SKILL.md Token Usage

For each flagged skill:

• Trim prose to imperative bullets
• Collapse verbose examples to minimal code fences
• Remove redundant explanations covered by parent AGENTS.md or CLAUDE.md
• Remove blank lines between list items
• Target <=120 lines; if still over, move detail to references/ files with clear pointers
• For multi-domain skills, split into variant reference files (read only the relevant one)

Phase 4 — Fix Structure & Frontmatter

• YAML frontmatter: name matches directory (kebab-case), description starts with "Use when"
• Section order: H1 title → When to Use → Rules/Instructions → Quick Reference → Validation
• Remove empty or placeholder sections
• Use imperative voice throughout

Phase 5 — Cross-Skill Deduplication

1. Identify repeated content blocks across skills (>5 similar lines)
2. Move shared content to root CLAUDE.md, AGENTS.md, or a shared skill
3. Replace duplicates with one-line pointer: "See <skill-name> for ..."
4. Reword overlapping description fields so each skill has a unique trigger

Phase 6 — Extract Bloated AGENTS.md Blocks

1. Scan AGENTS.md for inline instruction blocks >30 lines
2. Create a new skill at .agents/skills/<name>/SKILL.md
3. Replace original block with slim pointer + Quick Reference
4. If a skill sync script exists, run it

Output Format

## Optimisation Report

| File | Before | After | Delta |
|------|-------:|------:|------:|
| ...  |    250 |   110 |  -140 |

Total files audited: N
Total lines saved: N
Content migrated to skills: N

Validation

• Every CLAUDE.md line passes the "would removing cause mistakes?" test
• No SKILL.md exceeds 120 lines
• Every SKILL.md has valid YAML frontmatter with name and description
• No two skills share >5 identical lines
• No AGENTS.md has inline instruction blocks >30 lines without a skill pointer
• Domain-specific content lives in skills, not CLAUDE.md