- Add Slack as customer-facing messaging platform (client, 4 MCP tools, dashboard card) - Add /api/chat endpoint powered by Claude Haiku with SquareMCP system prompt - Add embeddable chat-widget.js injected into all 3 sites (docs, app, www) - Add ANTHROPIC_API_KEY, serve product/ as static files - Update Platform type to include slack Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>