1. In ChatGPT, open Apps → find Guides (or add MCP URL https://mcp.guides.co/mcp in developer mode).
2. Sign in with Guides when prompted (OAuth - no API key paste).
3. Start a new chat after connecting so tool lists refresh.
4. Verify access: "List my Guides notebooks."
5. If tools seem stale, disconnect and reconnect the app.

The AI acts as a guide editor: scaffold outlines, fill placeholders, merge duplicates, reorder sections - not just create new pages.