Add 6 real-world use cases from YouTube creator workflow

- YouTube Content Pipeline: Automated video idea scouting with X/Twitter integration
- Personal CRM: Contact discovery and meeting prep automation
- AI Earnings Tracker: Tech earnings monitoring and summaries
- Knowledge Base (RAG): Searchable repository of saved content
- Health & Symptom Tracker: Food and symptom logging with pattern analysis
- Multi-Channel Assistant: Unified interface across Telegram, Slack, Google Workspace

All use cases verified in daily production use by @matthewberman

usecases/youtube-content-pipeline.md

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+# YouTube Content Pipeline
+
+As a daily YouTube creator, finding fresh, timely video ideas across the web and X/Twitter is time-consuming. Tracking what you've already covered prevents duplicates and helps you stay ahead of trends.
+
+This workflow automates the entire content scouting and research pipeline:
+
+• Hourly cron job scans breaking AI news (web + X/Twitter) and pitches video ideas to Telegram
+• Maintains a 90-day video catalog with view counts and topic analysis to avoid re-covering topics
+• Stores all pitches in a SQLite database with vector embeddings for semantic dedup (so you never get pitched the same idea twice)
+• When you share a link in Slack, OpenClaw researches the topic, searches X for related posts, queries your knowledge base, and creates an Asana card with a full outline
+
+## Skills you Need
+
+- `web_search` (built-in)
+- [x-research-v2](https://clawhub.ai) or custom X/Twitter search skill
+- [knowledge-base](https://clawhub.ai) skill for RAG
+- Asana integration (or Todoist)
+- `gog` CLI for YouTube Analytics
+- Telegram topic for receiving pitches
+
+## How to Set it Up
+
+1. Set up a Telegram topic for video ideas and configure it in OpenClaw.
+2. Install the knowledge-base skill and x-research skill.
+3. Create a SQLite database for pitch tracking:
+```sql
+CREATE TABLE pitches (
+  id INTEGER PRIMARY KEY,
+  timestamp TEXT,
+  topic TEXT,
+  embedding BLOB,
+  sources TEXT
+);
+```
+4. Prompt OpenClaw:
+```text
+Run an hourly cron job to:
+1. Search web and X/Twitter for breaking AI news
+2. Check against my 90-day YouTube catalog (fetch from YouTube Analytics via gog)
+3. Check semantic similarity against all past pitches in the database
+4. If novel, pitch the idea to my Telegram "video ideas" topic with sources
+
+Also: when I share a link in Slack #ai_trends, automatically:
+1. Research the topic
+2. Search X for related posts
+3. Query my knowledge base
+4. Create an Asana card in Video Pipeline with a full outline
+```