feat(skills): Add notion-writer skill and YouTube manager CLI scripts

- Add 02-notion-writer skill with Python script for pushing markdown to Notion
- Add YouTube API CLI scripts for jamie-youtube-manager (channel status, video info, batch update)
- Update jamie-youtube-manager SKILL.md with CLI script documentation
- Update CLAUDE.md with quick reference guides

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

custom-skills/02-notion-writer/desktop/SKILL.md

@@ -0,0 +1,86 @@
+---
+name: notion-writer
+description: Push markdown content to Notion pages or databases. Supports appending to pages, replacing page content, creating database rows, listing accessible content, and getting page/database info. Use when working with Notion documentation, saving reports to Notion, or managing Notion content programmatically.
+allowed-tools: Read, Glob, Grep, Write, Edit, Bash
+---
+
+# Notion Writer Skill
+
+Push markdown content to Notion pages or databases via Claude Code.
+
+## Prerequisites
+
+- Python virtual environment at `~/Project/claude-skills-factory/custom-skills/02-notion-writer/code/scripts/venv`
+- Notion API key configured in `.env` file
+- Target pages/databases must be shared with the integration
+
+## Quick Start
+
+```bash
+cd ~/Project/claude-skills-factory/custom-skills/02-notion-writer/code/scripts
+source venv/bin/activate
+```
+
+## Commands
+
+### Test Connection
+```bash
+python notion_writer.py --test
+```
+
+### List Accessible Content
+```bash
+python notion_writer.py --list
+python notion_writer.py --list --filter pages
+python notion_writer.py --list --filter databases
+```
+
+### Get Page/Database Info
+```bash
+python notion_writer.py -p PAGE_URL --info
+python notion_writer.py -d DATABASE_URL --info
+```
+
+### Write to Page
+```bash
+# Append content
+python notion_writer.py -p PAGE_URL -f content.md
+
+# Replace content
+python notion_writer.py -p PAGE_URL -f content.md --replace
+
+# From stdin
+cat report.md | python notion_writer.py -p PAGE_URL --stdin
+```
+
+### Create Database Row
+```bash
+python notion_writer.py -d DATABASE_URL -t "Entry Title" -f content.md
+```
+
+## Supported Markdown
+
+| Markdown | Notion Block |
+|----------|--------------|
+| `# Heading` | Heading 1 |
+| `## Heading` | Heading 2 |
+| `### Heading` | Heading 3 |
+| `- item` | Bulleted list |
+| `1. item` | Numbered list |
+| `- [ ] task` | To-do (unchecked) |
+| `- [x] task` | To-do (checked) |
+| `> quote` | Quote |
+| `` ```code``` `` | Code block |
+| `---` | Divider |
+| Paragraphs | Paragraph |
+
+## Workflow Example
+
+Integrate with Jamie YouTube Manager to log video info:
+```bash
+# Check video and save to markdown
+python jamie_youtube_api_test.py VIDEO_URL
+
+# Write to Notion
+python notion_writer.py -p LOG_PAGE_URL -f output/video_status.md
+```