Add daily digest system documentation

- Created memory/daily-digest-system.md with full system overview
- Documented API endpoints and cron schedule
- Added instructions for AI continuity if agent is replaced

memory/daily-digest-system.md

@@ -0,0 +1,66 @@
+# Daily Digest System
+
+## Overview
+Automated daily digest at 7:00 AM CST covering:
+- iOS development news (especially AI-related)
+- OpenClaw updates and community news
+- Digital entrepreneurship and passive income opportunities
+
+## How It Works
+
+### 1. Research Phase
+The agent searches for:
+- **iOS + AI**: Latest developments in AI for iOS apps, CoreML, on-device ML
+- **OpenClaw**: GitHub updates, Discord discussions, new features
+- **Digital Products**: SaaS ideas, indie hacking, app store success stories
+
+### 2. Compilation
+Creates a formatted digest with:
+- Date and title
+- Categorized sections
+- Links to sources
+- Brief summaries
+
+### 3. Distribution
+- **Primary**: Posts to blog-backup at http://localhost:3003
+- **Notification**: Sends Telegram message with link to digest
+
+## API Endpoints
+
+### Blog Backup
+```bash
+POST http://localhost:3003/api/messages
+Content-Type: application/json
+
+{
+  "date": "2026-02-18",
+  "content": "## Daily Digest - Feb 18, 2026\n\n### iOS + AI..."
+}
+```
+
+### Telegram
+Use the `message` tool with channel=telegram
+
+## Running Manually
+```bash
+cd /Users/mattbruce/Documents/Projects/OpenClaw/Web/blog-backup
+# Trigger digest generation via cron or manual run
+```
+
+## Schedule
+- **Time**: 7:00 AM CST daily
+- **Cron**: Set up via OpenClaw cron system
+
+## For Future AI Continuity
+If this agent is replaced:
+1. Read this file for context
+2. Check cron jobs: `openclaw cron list`
+3. The job runs as isolated session with full context in payload
+4. Blog data persists in `data/messages.json`
+
+## Search Queries Used
+- "iOS AI development 2026"
+- "CoreML new features"
+- "OpenClaw GitHub"
+- "indie iOS developer success"
+- "digital products passive income"