feat: Add installation tool, Claude.ai export, and skill standardization (#1)

## Summary

- Add portable installation tool (`install.sh`) for cross-machine setup
- Add Claude.ai export files with proper YAML frontmatter
- Add multi-agent-guide v2.0 with consolidated framework template
- Rename `00-claude-code-setting` → `00-our-settings-audit` (avoid reserved word)
- Add YAML frontmatter to 25+ SKILL.md files for Claude Desktop compatibility

## Commits Included

- `93f604a` feat: Add portable installation tool for cross-machine setup
- `9b84104` feat: Add Claude.ai export for portable skill installation
- `f7ab973` fix: Add YAML frontmatter to Claude.ai export files
- `3fed49a` feat(multi-agent-guide): Add v2.0 with consolidated framework
- `3be26ef` refactor: Rename settings-audit skill and add YAML frontmatter

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

custom-skills/00-our-settings-audit/desktop/references/mcp-token-estimates.md

@@ -0,0 +1,88 @@
+# MCP Server Token Estimates
+
+Approximate token usage for common MCP servers when loaded.
+
+## Official Anthropic Servers
+
+| Server | Tools | Tokens (est.) | Recommendation |
+|--------|-------|---------------|----------------|
+| Playwright | 20+ | 13,500 | Keep if testing |
+| Filesystem | 8 | 4,000 | Essential |
+| Memory | 5 | 3,000 | Optional |
+| Brave Search | 2 | 1,500 | Alternative to web |
+| Fetch | 2 | 1,200 | Keep for web access |
+
+## Third-Party Servers
+
+| Server | Tools | Tokens (est.) | Recommendation |
+|--------|-------|---------------|----------------|
+| Notion | 10 | 5,000 | Keep if using Notion |
+| GitHub | 25+ | 18,000 | Lazy load only |
+| PostgreSQL | 15 | 8,000 | Lazy load only |
+| Slack | 12 | 6,000 | Lazy load only |
+| Figma | 15 | 10,000 | Lazy load only |
+| Zapier | 50+ | 25,000+ | **Avoid** |
+| Firecrawl | 5 | 3,500 | Useful for SEO |
+| Perplexity | 2 | 1,500 | Alternative to web |
+
+## Token Budget Guidelines
+
+### Conservative Setup (High Available Context)
+```
+2-3 essential MCP servers
+Total: ~10,000-15,000 tokens
+Available: 185,000+ tokens (92%+)
+```
+
+### Standard Setup
+```
+4-5 MCP servers
+Total: ~20,000-30,000 tokens
+Available: 170,000+ tokens (85%+)
+```
+
+### Heavy Setup (Risk Zone)
+```
+6+ MCP servers
+Total: 40,000+ tokens
+Available: <160,000 tokens (<80%)
+⚠️ Higher chance of "Exceed response limit"
+```
+
+## Reduction Strategies
+
+### If using GitHub MCP heavily:
+- Start conversation specifically for GitHub work
+- Don't load other heavy servers simultaneously
+
+### If using multiple API servers:
+- Choose ONE per category:
+  - Web search: Brave OR Perplexity (not both)
+  - Automation: Zapier OR n8n (not both)
+  - Database: PostgreSQL OR MySQL (not both)
+
+### If testing/development:
+- Playwright OR Puppeteer (not both)
+- Load only when actively testing
+
+## Impact of serverInstructions
+
+**Without serverInstructions:**
+- Full tool schemas loaded (~500 tokens per tool)
+- Discovery overhead on each interaction
+
+**With serverInstructions:**
+- Reduced discovery queries
+- More efficient tool selection
+- Saves ~30-50% on tool-related tokens
+
+## Quick Reference
+
+**Token estimation formula:**
+```
+Server tokens ≈ (number of tools × 400) + 500 base
+```
+
+**Example:**
+- 10 tools = (10 × 400) + 500 = 4,500 tokens
+- 25 tools = (25 × 400) + 500 = 10,500 tokens