Vercel introduces the Agent Stack, a set of integrated building blocks for building production-grade AI agents. It covers three core capabilities: connecting to models via AI SDK and AI Gateway (a single endpoint routing across hundreds of models with failover and cost tracking), executing durable multi-step workflows via Workflow SDK (with checkpointing, retries, and state persistence) and Vercel Sandbox (isolated microVMs for safe code execution), and connecting to data and tools via Vercel Connect (short-lived scoped tokens for services like Slack, GitHub, Snowflake, and Salesforce) and Chat SDK (deploy one agent across multiple platforms like Slack, Discord, and WhatsApp). Vercel also announces 'eve', an opinionated open-source agent framework that wires all these building blocks together in a single directory structure, currently in public beta.