Building agents with OpenAI and Cloudflare’s Agents SDK

OpenAI’s Agents SDK handles AI logic and reasoning, while Cloudflare’s Agents SDK provides a persistent, scalable runtime across their global network. This split lets OpenAI focus on cognition and planning, and Cloudflare manage execution, identity, and memory with Durable Objects. Agents can be composed into multi-agent systems, support human-in-the-loop workflows, or be addressable via interfaces like phone or WebSockets. Durable Objects enable agents to persist state, coordinate across sessions, and connect via diverse inputs beyond HTTP. Key learnings include the importance of stable identity for persistent agents and the power of composable, stateful agent architectures resembling microservices.