Agents SDK Adds Durable Harness for Long-Running Agent Work
OpenAI’s Steve Coffey and Nish Singaraju present the updated Agents SDK as a way to move long-running agent work out of hand-built orchestration loops and into a model-native harness. Their case is that production agents increasingly need durable state, file-system access, tools, skills, sandboxing, and resumability, while the actual compute environment should remain replaceable and ephemeral. Coffey distinguishes this from one-shot Responses API calls and hosted shell use, arguing that the SDK is meant for agents operating across files, systems, and multi-step workflows.
OpenAI·May 28, 2026·17 min read
