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/91-multi-agent-guide/commands/quick-setup.md

@@ -0,0 +1,95 @@
+---
+name: multi-agent-setup
+description: Quick setup for multi-agent collaboration using the consolidated framework
+---
+
+# Quick Multi-Agent Setup
+
+You are setting up multi-agent collaboration using the consolidated MULTI_AGENT_FRAMEWORK.md template.
+
+## Your Task
+
+Perform a rapid setup with minimal questions:
+
+### Step 1: Quick Assessment
+
+Check the project structure:
+```bash
+ls -la
+ls src/ 2>/dev/null || ls lib/ 2>/dev/null || echo "No src directory"
+```
+
+### Step 2: Ask ONE Question
+
+Use AskUserQuestion to ask:
+
+```
+Which agents will participate in this project?
+- Claude + Gemini + Codex (Full team)
+- Claude + Codex (Dev focused)
+- Claude + Gemini (Research focused)
+- Claude only (Solo with guidelines)
+```
+
+### Step 3: Create Files
+
+Based on the answer, create these files:
+
+**Always create:**
+```
+.agent-state/tasks.yaml
+.agent-state/locks.yaml
+MULTI_AGENT_FRAMEWORK.md    ← Use template from skill
+tools/check-ownership.py
+```
+
+**If Gemini included:**
+```
+GEMINI.md
+```
+
+**If Codex included:**
+```
+CODEX.md
+```
+
+### Step 4: Customize Framework
+
+In MULTI_AGENT_FRAMEWORK.md:
+1. Replace `{{PROJECT_NAME}}` with actual project name
+2. Replace `{{DATE}}` with current date
+3. Adjust ownership matrix based on project structure
+
+### Step 5: Summary
+
+Output a concise summary:
+
+```markdown
+## Multi-Agent Framework Installed
+
+**Files Created:**
+- `.agent-state/tasks.yaml`
+- `.agent-state/locks.yaml`
+- `MULTI_AGENT_FRAMEWORK.md`
+- `tools/check-ownership.py`
+- [Additional agent files if created]
+
+**Next Steps:**
+1. Set agent identity: `export AGENT_AUTHOR=claude`
+2. Review ownership matrix in `MULTI_AGENT_FRAMEWORK.md`
+3. Start using `[Agent] type(scope): message` commit format
+
+**Commands:**
+- Check ownership: `python tools/check-ownership.py <file>`
+- View tasks: `cat .agent-state/tasks.yaml`
+- View locks: `cat .agent-state/locks.yaml`
+```
+
+## Template Location
+
+Use the consolidated framework template from:
+`${SKILL_DIR}/templates/multi-agent-framework.md`
+
+## Key Principle
+
+**Speed over completeness** - Get the framework running quickly. Users can customize later.