Guillermo Rauch Ships OSS Vibe Coding Platform + Vercel AI SDK 5 With Agentic Control Primitives

Vercel Blog·high signal

Rauch shipped two major releases: an open-source vibe-coding platform (v0-equivalent) built on AI SDK, Gateway, and Sandbox — tuned with OpenAI on the GPT-5 agent loop with full BYO-model support. Simultaneously, AI SDK 5 launched with new agentic primitives (stopWhen, prepareStep, Agent object), speech APIs, MCP-aligned tool naming, and full end-to-end type safety for React/Vue/Svelte/Angular. Together these represent Vercel's open-source challenge to closed vibe-coding platforms.