Every week I see another "I built a SaaS in 4 hours with AI" post. And every week, the comments are the same: "Cool, but does the Stripe integration actually work?" Usually it doesn't. That's vibe coding. You prompt, you hope, and you pray that the AI correctly implements a payment flow it's never actually tested. It hallucinates webhook handlers. It guesses at email configs. It builds checkout flows that break on the first real transaction. We took the opposite approach. The puzzle piece pattern We're building WebsitePublisher.ai — a platform where AI assistants build and publish websites and web applications through conversation. Available on 9 AI platforms (Claude, ChatGPT, Gemini, Cursor, Windsurf, GitHub Copilot, Grok, Mistral, n8n) via MCP protocol. In the last 16 days, we shipped 78 integrations. Each one is a self-contained puzzle piece — proven software running on our web servers. AI doesn't generate the integration code. AI calls the integration.…