v0.12.5

What's Changed

• feat(mcp): expose auth and httpx_client_factory in SSE/StreamableHttp params by @adityasingh2400 in #2713
• fix: recover streamed nested agent output before cancellation fallback by @elainegan-openai in #2714
• fix(mcp): retry ClosedResourceError on isolated session by @elainegan-openai in #2711
• fix(mcp): retry MCP 408s on isolated session by @elainegan-openai in #2709

Documentation & Other Changes

• Release 0.12.5 by @github-actions[bot] in #2716

Full Changelog: v0.12.4...v0.12.5