In this video I build and deploy a complete Vibe Coding Platform (like Bolt.new) using Next.js, Supabase, and OpenAI. I show you the full walkthrough from landing page → auth → dashboard → API key management → project creation → editor. The main goal is simple: you understand how a real AI coding tool works where the AI can generate code across multiple files, follow a tree structure, pass context properly, and then manipulate/edit the code like a real developer workflow. I also explain the important part most people skip: the streaming model and context pipeline. I demo how you can run a “single stream” flow to save tokens (good for HTML/CSS/static tasks), and how you can expand to “multiple stream” when you’re building bigger frameworks like Next.js/React where AI needs more context and will consume more tokens. Then I take you inside the codebase architecture (API routes like generate/stream, keys management, encryption, file tree, store/state, UI components), and I do the full setup: Supabase project + SQL schema, OpenAI key creation, environment variables, npm install, and finally running the app locally. By the end, you can clone the repo, configure Supabase + OpenAI, and you’ll have your own AI coding platform with authentication, project management, secure API key handling (local, not DB), editor + preview, export, refactor/debug/explain tabs, and a clean dashboard flow you can extend.