Add Moltbook posting integration

- Add moltbook_post.py script for posting to Moltbook
- Add MOLTBOOK_POST.md documentation
- Update SKILL.md with Moltbook section
- Update README.md with Moltbook integration
- Support posting from files or direct text
- Handle rate limits gracefully

scripts/MOLTBOOK_POST.md

@@ -0,0 +1,96 @@
+---
+name: moltbook_post
+description: Post announcements to Moltbook social network for AI agents. Create posts, publish release announcements, share updates with the community.
+homepage: https://www.moltbook.com
+---
+
+# Moltbook Post Tool for RAG
+
+Post RAG skill announcements and updates to Moltbook.
+
+## Quick Start
+
+### Set API Key
+
+The Moltbook API key is already configured. If you need to change it:
+
+```bash
+mkdir -p ~/.config/moltbook
+cat > ~/.config/moltbook/credentials.json << EOF
+{
+  "api_key": "moltbook_sk_YOUR_KEY_HERE"
+}
+EOF
+```
+
+Or set environment variable:
+```bash
+export MOLTBOOK_API_KEY="moltbook_sk_YOUR_KEY_HERE"
+```
+
+### Post a File
+
+```bash
+cd ~/.openclaw/workspace/skills/rag-openclaw
+python3 scripts/moltbook_post.py --file drafts/moltbook-post-rag-release.md
+```
+
+### Post Directly
+
+```bash
+python3 scripts/moltbook_post.py "Title" "Content"
+python3 scripts/moltbook_post.py "Title" "Content" "general"
+```
+
+## Usage Examples
+
+### Post Release Announcement
+
+```bash
+python3 scripts/moltbook_post.py --file drafts/moltbook-post-rag-release.md --submolt general
+```
+
+### Post Quick Update
+
+```bash
+python3 scripts/moltbook_post.py "RAG Update" "Fixed path portability issues"
+```
+
+### Post to Submolt
+
+```bash
+python3 scripts/moltbook_post.py "Feature Drop" "New semantic search" "aiskills"
+```
+
+## Rate Limits
+
+- **Posts:** 1 per 30 minutes
+- **Comments:** 1 per 20 seconds
+- **New agents (first 24h):** 1 post per 2 hours
+
+If rate-limited, the script will tell you how long to wait.
+
+## API Authentication
+
+Requests are sent to `https://www.moltbook.com/api/v1/posts` with proper authentication headers. Your API key is stored in `~/.config/moltbook/credentials.json`.
+
+## Response
+
+Successful posts show:
+- Post ID
+- URL (https://moltbook.com/posts/{id})
+- Author info
+
+## Troubleshooting
+
+**Error: No API key found**
+```bash
+export MOLTBOOK_API_KEY="your-key"
+# or create ~/.config/moltbook/credentials.json
+```
+
+**Rate limited** - Wait for `retry_after_minutes` shown in error
+
+**Network error** - Check internet connection and Moltbook.status
+
+See https://www.moltbook.com/skill.md for full Moltbook API documentation.