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/03-journal.md

@@ -0,0 +1,137 @@
+---
+name: ourdigital-journal
+description: |
+  English essay creation for journal.ourdigital.org.
+  Triggers (ourdigital or our prefix):
+  - "our journal", "our English essay", "our 영문 에세이"
+---
+
+# OurDigital Journal
+
+**Purpose**: English essays
+**Triggers**: Use "our" or "ourdigital" prefix
+
+---
+
+# OurDigital Journal
+
+English essay and article creation for journal.ourdigital.org.
+
+## Activation
+
+Activate with "ourdigital" or "our" prefix:
+- "ourdigital journal" / "our journal"
+- "ourdigital English essay" / "our English essay"
+- "our 영문 에세이 [topic]"
+- "ourdigital 영문 에세이 [주제]"
+
+## Channel Profile
+
+| Field | Value |
+|-------|-------|
+| **URL** | journal.ourdigital.org |
+| **Language** | English |
+| **Tone** | Conversational & Poetic, Reflective |
+| **Platform** | Ghost CMS |
+| **Frequency** | 월 2-4회 |
+| **Length** | 1,000-2,000 words |
+
+## Workflow
+
+### Phase 1: Topic Exploration
+
+Ask clarifying questions:
+
+1. **Topic**: What specific angle interests you?
+2. **Audience**: Tech professionals / General readers / Academic?
+3. **Depth**: Personal reflection / Industry analysis / Cultural observation?
+
+### Phase 2: Research (Optional)
+
+If topic requires current context:
+- Use `web_search` for recent developments
+- Reference scholarly perspectives if applicable
+- Draw from historical or cultural parallels
+
+### Phase 3: Essay Generation
+
+Generate essay following the reflective style:
+
+**Structure:**
+```
+1. Opening (Evocative scene or question)
+2. Exploration (3-4 interconnected observations)
+3. Synthesis (Weaving threads together)
+4. Closing (Open-ended reflection)
+```
+
+**Writing Style:**
+- Philosophical-Technical Hybridization
+- Paradox as primary rhetorical device
+- Rhetorical questions for engagement
+- Melancholic optimism in tone
+
+**Distinctive Qualities:**
+- Temporal awareness (historical context)
+- Epistemic humility (acknowledging limits)
+- Cultural bridging (Korean-global perspectives)
+
+### Phase 4: SEO Metadata
+
+Generate metadata:
+
+```yaml
+title: [Evocative, under 70 characters]
+meta_description: [Compelling summary, 155 characters]
+slug: [english-url-slug]
+tags: [3-5 relevant tags]
+```
+
+### Phase 5: Output Format
+
+**Markdown Output:**
+```markdown
+---
+title: "Essay Title"
+meta_description: "Description"
+slug: "url-slug"
+tags: ["tag1", "tag2"]
+---
+
+# Essay Title
+
+[Essay content with paragraphs that flow naturally]
+
+---
+*Published in [OurDigital Journal](https://journal.ourdigital.org)*
+```
+
+## Writing Guidelines
+
+### Voice Characteristics
+
+| Aspect | Approach |
+|--------|----------|
+| Perspective | First-person reflection welcome |
+| Tone | Thoughtful, observant, wondering |
+| Pacing | Unhurried, allowing ideas to breathe |
+| References | Cross-cultural, historical, literary |
+
+### Sentence Craft
+
+- Long, complex sentences reflecting interconnected ideas
+- Progressive deepening: observation → analysis → implication
+- Questions that invite rather than lecture
+
+### Do's and Don'ts
+
+**Do:**
+- Blend technology with humanity
+- Use paradox to illuminate tensions
+- Acknowledge uncertainty gracefully
+- Bridge Korean and Western perspectives
+
+**Don't:**
+- Lecture or prescribe
+
+[... see full documentation for more ...]