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/_ourdigital-shared/claude-ai-export/individual/10-skill-creator.md

@@ -0,0 +1,137 @@
+---
+name: ourdigital-skill-creator
+description: |
+  Meta skill for creating and managing new skills.
+  Triggers (ourdigital or our prefix):
+  - "our skill create", "our 스킬 만들기"
+---
+
+# OurDigital Skill Creator
+
+**Purpose**: Creating new skills
+**Triggers**: Use "our" or "ourdigital" prefix
+
+---
+
+# OurDigital Skill Creator
+
+Meta skill for creating, validating, and managing OurDigital Claude Skills.
+
+## Activation
+
+Activate with "ourdigital" or "our" prefix:
+- "ourdigital 스킬 만들어줘" / "our 스킬 만들어줘"
+- "ourdigital skill creator" / "our skill creator"
+- "our skill create [name]"
+
+Do NOT activate for generic "make a skill" requests (without our/ourdigital prefix).
+
+## Interactive Workflow
+
+### Phase 1: Need Assessment
+
+When user requests a new skill:
+
+1. **Acknowledge** the initial request
+2. **Ask clarifying questions** (max 3 per turn):
+   - What is the core purpose?
+   - What triggers this skill?
+   - What outputs do you expect?
+
+### Phase 2: Suitability Check
+
+Evaluate against Claude Skill criteria:
+
+| Criterion | Question to Ask |
+|-----------|-----------------|
+| Clear trigger | When exactly should this skill activate? |
+| Focused scope | Can you describe 1-3 core functions? |
+| Reusable resources | What scripts, templates, or references are needed? |
+| Domain knowledge | What specialized knowledge does Claude lack? |
+| Clear boundaries | How does this differ from existing skills? |
+
+**Decision**: If ≥3 criteria pass → proceed. Otherwise, suggest alternatives.
+
+### Phase 3: Requirements Definition
+
+Guide user through structured Q&A:
+
+```
+Q1. 스킬 목적과 핵심 기능은 무엇인가요?
+    (What is the skill's purpose and core functions?)
+
+Q2. 어떤 상황에서 이 스킬이 트리거되어야 하나요?
+    (When should this skill be triggered?)
+
+Q3. 필요한 외부 도구나 API가 있나요?
+    (Any external tools or APIs needed?)
+
+Q4. 기대하는 출력 형식은 무엇인가요?
+    (What output format do you expect?)
+
+Q5. Desktop, Code, 또는 Both 환경이 필요한가요?
+    (Which environment: Desktop, Code, or Both?)
+```
+
+### Phase 4: Skill Generation
+
+Generate skill structure following OurDigital standards:
+
+```
+XX-ourdigital-{skill-name}/
+├── desktop/
+│   └── SKILL.md         # Desktop version
+├── code/
+│   └── SKILL.md         # Code version (CLAUDE.md pattern)
+├── shared/
+│   ├── references/      # Common documentation
+│   ├── templates/       # Shared templates
+│   └── scripts/         # Utility scripts
+├── docs/
+│   ├── CHANGELOG.md     # Version history
+│   └── logs/            # Update logs
+└── README.md            # Overview
+```
+
+### Phase 5: Validation
+
+Before finalizing, verify:
+
+- [ ] YAML frontmatter includes "ourdigital" trigger keywords
+- [ ] Description clearly states activation conditions
+- [ ] Body content is 800-1,200 words
+- [ ] shared/ resources are properly referenced
+- [ ] No overlap with existing ourdigital skills
+
+### Phase 6: Notion Sync
+
+Record to Working with AI database:
+
+- **Database**: f8f19ede-32bd-43ac-9f60-0651f6f40afe
+- **Properties**:
+  - Name: `ourdigital-{skill-name} v{version}`
+  - Status: In progress → Done
+  - AI used: Claude Desktop
+  - AI summary: Brief skill description
+
+## YAML Frontmatter Template
+
+```yaml
+---
+name: ourdigital-{skill-name}
+description: |
+  [Purpose summary]
+  Activated when user includes "ourdigital" keyword.
+
+  Triggers:
+  - "ourdigital {keyword1}", "ourdigital {keyword2}"
+
+  Features:
+  - Feature 1
+  - Feature 2
+version: "1.0"
+author: OurDigital
+environment: Desktop | Code | Both
+---
+
+[... see full documentation for more ...]