Vercel Ship AI 2025 recap

This post announces AI SDK 6, introducing an agent abstraction for defining agents once and reusing them across applications and workflows. It includes a tool execution approval system (`needsApproval: true`) for human-in-the-loop review of agent actions. The Vercel Marketplace has expanded to include agents and AI services. The Workflow Development Kit (`use workflow`) is introduced as a way to add durability, retries, and state persistence to TypeScript functions. Vercel Agent beta is launched with AI code reviews and automated investigations. Zero-configuration Python support for frameworks like FastAPI and Flask is also announced. Open-source lead and data analyst agents are presented as examples of combining these tools.