feat(settings-audit): Add Claude Code settings optimizer skill

- Add new 00-claude-code-setting skill for token usage optimization
- Includes audit scripts for MCP servers, CLAUDE.md, and extensions
- Auto-fix capability with backup for serverInstructions and frontmatter
- Add YAML frontmatter to 17 command files
- Target: keep baseline under 30% of 200K context limit

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom-skills/00-claude-code-setting/code/commands/settings-audit.md

@@ -0,0 +1,119 @@
+---
+description: Audit Claude Code settings for token efficiency. Analyzes MCP servers, CLAUDE.md, extensions and provides optimization recommendations.
+argument-hint: [--fix] [--tokens-only]
+allowed-tools: Read, Glob, Grep, Bash, Write
+---
+
+# Claude Code Settings Audit
+
+Audit your Claude Code configuration to optimize token usage and performance.
+
+## Arguments
+- `--fix`: Apply safe fixes automatically (with backup)
+- `--tokens-only`: Quick token budget check only
+
+## Audit Process
+
+### 1. Token Budget Check
+
+Calculate current baseline token usage:
+
+```bash
+# Quick estimation
+echo "=== Token Budget Estimation ==="
+```
+
+**Targets:**
+- CLAUDE.md: <3,000 tokens (~200 lines)
+- MCP with Tool Search: <10,000 tokens
+- Working space: >70% of 200K context
+
+### 2. MCP Server Analysis
+
+Check locations:
+- `~/.claude/settings.json`
+- `./.claude/settings.json`
+
+For each server, evaluate:
+- [ ] Has `serverInstructions` (CRITICAL for Tool Search)
+- [ ] Appropriate load strategy (always/lazy/disable)
+- [ ] Token impact estimation
+
+**Server Token Estimates:**
+| Server | Tokens | Strategy |
+|--------|--------|----------|
+| Playwright | ~13,500 | always |
+| Notion | ~5,000 | always |
+| GitHub | ~18,000 | lazy |
+| PostgreSQL | ~8,000 | lazy |
+| Zapier | ~25,000+ | disable |
+
+### 3. CLAUDE.md Analysis
+
+Check:
+- `~/.claude/CLAUDE.md` (global)
+- `./CLAUDE.md` (project)
+
+Evaluate:
+- [ ] Line count (critical if >200)
+- [ ] Token estimate (critical if >3,000)
+- [ ] Good structure (headers, lists, not wall of text)
+- [ ] No redundant information
+- [ ] No information Claude already knows
+
+### 4. Extensions Analysis
+
+**Commands** (`~/.claude/commands/`):
+- Has YAML frontmatter with description?
+- Under 100 lines?
+
+**Skills** (`~/.claude/skills/`):
+- Has SKILL.md?
+- Under 500 lines?
+
+**Agents** (`~/.claude/agents/`):
+- Tools appropriately restricted?
+
+## Output Format
+
+```markdown
+# Settings Audit Report
+Generated: [timestamp]
+
+## Token Budget Summary
+| Component | Tokens | % of 200K | Status |
+|-----------|--------|-----------|--------|
+| CLAUDE.md | X | Y% | OK/WARN/CRITICAL |
+| MCP Servers | X | Y% | OK/WARN/CRITICAL |
+| Extensions | X | Y% | OK/WARN/CRITICAL |
+| **Baseline** | **X** | **Y%** | — |
+| **Available** | **X** | **Y%** | — |
+
+## Critical Issues
+[Must fix immediately]
+
+## Warnings
+[Should address soon]
+
+## Recommendations
+1. [Prioritized action]
+2. [...]
+
+## Auto-Fix Available
+[List of safe fixes that can be applied with --fix]
+```
+
+## Quick Fixes
+
+If `--fix` is provided:
+1. Add `serverInstructions` to MCP servers missing them
+2. Add frontmatter to commands missing it
+3. Create backup before any changes
+
+## Execution
+
+1. Run token budget analysis first
+2. Analyze each component
+3. Generate prioritized report
+4. Offer auto-fix if issues found
+5. Save report to `./settings-audit-report.md`