Matt Carey

Durable Objects and Dynamic Workers Reopen Eval for AI Agents

Cloudflare engineers Sunil Pai and Matt Carey argue that AI agents need compute primitives beyond stateless functions: Durable Objects for addressable, persistent coordination, and Dynamic Workers for safely running generated code. Pai frames Durable Objects as the execution unit behind Cloudflare’s Agents SDK, giving agents state, resumable streams, scheduling, and multi-client sync without pushing distributed-systems work onto developers. Carey and Pai present Dynamic Workers as the larger shift: a sandboxed “eval++” model where LLM- or user-generated code starts with no ambient authority and receives only explicitly granted capabilities.