[Release] openai/openai-agents-python v0.12.5: v0.12.5

OpenAI Agents Python v0.12.5 release includes enhancements to MCP (Model Context Protocol) integration with exposed authentication and HTTP client factory parameters, improved error recovery for streamed nested agent outputs, and fixes for resource closure and timeout handling in isolated sessions. The release focuses on reliability improvements for agent streaming and MCP communication.

Key Points

• •Expose auth and httpx_client_factory parameters in SSE/StreamableHttp for better MCP configuration control
• •Recover streamed nested agent output before applying cancellation fallback to prevent data loss
• •Implement retry logic for ClosedResourceError exceptions on isolated MCP sessions
• •Add retry handling for MCP 408 timeout responses on isolated sessions to improve resilience
• •Enhance streaming reliability for nested agents and MCP protocol interactions
• •Improve error recovery mechanisms in agent-to-agent communication patterns

Workflow Diagram

Concepts