Microsoft Agent Framework Python 1.14.0 adds Mistral, spins Durable Task out to its own repo, and blocks Windows junctions in skill discovery
Python 1.14.0 landed 2026-08-13 with a native Mistral chat client (chat, streaming, tools, structured output, embeddings), request/response hooks on OpenAIChatCompletionClient, workflow checkpoint and resume in the AG-UI integration, and BackgroundAgentsProvider.release_session() for cancelling work and releasing per-session state. Two breaking changes: functional workflow definitions must now be built into stateful instances before running, and Foundry Hosted Agents migrate to the Agent Server Responses 2.x storage model. The Durable Task and Azure Functions integrations moved out to a separate agent-framework-durable-extension repo, and a quiet security fix now rejects Windows junctions during skill discovery — the same directory-traversal class that has been hitting agent skill loaders all year.
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