What changed
OpenAI updated the Agents SDK with a model-native harness and native sandbox execution, while the openai-agents-python repo continued shipping releases and building community adoption.
Why it matters
It strengthens OpenAI's claim to the harness layer beneath agent apps, not just the model API.
Evidence
OpenAI described a model-native harness plus native sandbox execution on April 15. The public GitHub repo now shows 23.7k stars and a latest v0.14.2 release dated April 18, 2026.