dotnet-1.25.0
Microsoft Agent Framework released dotnet-1.25.0 featuring a breaking change to decouple Cosmos chat metadata from the partition-key strategy, tool-approval auto-rejection, SSE stream termination updates, and A2A package upgrades.
Why this signal matters
The .NET Agent Framework version 1.25.0 includes several breaking changes, bug fixes, and feature additions. Notably, Cosmos chat metadata is now decoupled from the partition-key strategy (BREAKING). Unresponded tool-approval requests are now automatically rejected, and approval reuse considerations have been added. The chat completions SSE stream now properly terminates with 'data: DONE '. Purview checks now include citations and error details. Additionally, support was added for closed-list workflow questions, A2A packages were upgraded to 1.0.0-preview3, Foundry toolbox response cache was isolated, and agent continuation token preservation was fixed when wrapped with UseOpenTelemetry. A prior breaking change requesting concise Harness progress without private reasoning was reverted.
Actionable summary
dotnet-1.25.0 introduces a breaking change decoupling Cosmos chat metadata from partition-key strategies. Key updates include automatic rejection of unresponded tool approvals, addition of 'data: DONE ' to terminate SSE chat completions streams, A2A package upgrades to 1.0.0-preview3, and fixes for continuation tokens under OpenTelemetry.
- Agent usefulness
- 94/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Review and update implementations relying on Cosmos chat metadata storage to accommodate the decoupled partition-key strategy.
- Verify tool-approval handling logic to ensure timeouts or unresponded requests properly handle the new auto-rejection behavior.
- Update client-side SSE consumers if relying on specific termination sequences, now explicitly closed with 'data: DONE '.
- Upgrade dependent projects using A2A packages to 1.0.0-preview3.