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microsoft-extensions-ai

10 posts

2026-10-02 microsoft-agent-framework dotnet ai-agents

Agent Framework 1.23: Function Middleware Can Finally Swap the Tool It Is Calling

Microsoft Agent Framework .NET 1.23.0 honors assignments to FunctionInvocationContext.Function, so middleware can redirect a tool call to a different AIFunction. A new WrapWithPendingMiddleware helper keeps the rest of the chain in the loop.

2026-09-29 blazor dotnet-11 aspnetcore

Blazor Gets Agentic UI Components in .NET 11 RC1: ChatPage, UIAgent, and Tool Approvals

Microsoft.AspNetCore.Components.AI is an experimental Blazor package in .NET 11 RC1 that turns any IChatClient into a streaming chat UI with tool approvals, typed tool rendering, and shared state over AG-UI.

2026-09-27 ag-ui dotnet ai-agents

AG-UI .NET SDK 1.0: AGUI.Server and AGUI.Client Move the Protocol Out of Agent Framework

The AG-UI protocol now has a standalone .NET SDK: AGUI.Server 1.0.0 streams any IChatClient as AG-UI events over SSE, and AGUIChatClient consumes an AG-UI endpoint as an IChatClient, down to .NET Framework 4.7.2. Agent Framework users get renamed APIs.

2026-09-26 dotnet ai microsoft-extensions-ai

Microsoft.Extensions.AI.OpenAI 10.10.1 Fixes the OpenAI 2.14 TypeLoadException

OpenAI 2.14.0 renamed GlobalMcpToolCallApprovalPolicy, which broke every tool-carrying Responses call through Microsoft.Extensions.AI.OpenAI 10.10.0. Version 10.10.1 moves to OpenAI 2.14.0 and also picks up the null reasoning status fix for OpenAI-compatible endpoints.

2026-09-20 microsoft-agent-framework dotnet ai-agents

Agent Framework 1.22: AsIChatClient Lets an AIAgent Pose as an IChatClient

Microsoft Agent Framework .NET 1.22.0 adds AIAgent.AsIChatClient(), closing the round trip with IChatClient.AsAIAgent(). Your agent, with its instructions and tools intact, now plugs into any API that takes an IChatClient.

2026-09-15 dotnet ai microsoft-extensions-ai

Microsoft.Extensions.AI 10.10 Fails Evaluation Metrics the Judge Never Scored

Microsoft.Extensions.AI.Evaluation.Quality 10.10.0 now marks unparseable and out-of-range quality scores as failed, and Microsoft.Extensions.AI.OpenAI 10.10.0 drops the Assistants adapter. Measured before and after on 10.9.0.

2026-08-14 dotnet ai microsoft-extensions-ai

Microsoft.Extensions.AI 10.9 Ships Routing and Failover Chat Clients

Microsoft.Extensions.AI 10.9.0 adds RoutingChatClient, OrderedFailoverChatClient, and SemanticRoutingChatClient. Verified against the real package: what fails over, what does not, and why MEAI001 breaks your build.

2026-07-09 migration llm ai-agents

Migrate From the OpenAI SDK to Microsoft.Extensions.AI in a .NET App

A step-by-step checklist for moving a .NET app off the raw OpenAI 2.12 SDK onto the provider-neutral Microsoft.Extensions.AI 10.7 IChatClient. Covers the AsIChatClient bridge, the CompleteChatAsync-to-GetResponseAsync rewrite, streaming, tool calling, DI registration, and the gotchas that bite mid-cutover.

2026-06-08 llm ai-agents anthropic-sdk

Anthropic SDK vs Microsoft.Extensions.AI for Calling Claude From .NET

Two ways to call Claude from C#: the official Anthropic .NET SDK directly, or the provider-neutral Microsoft.Extensions.AI IChatClient that wraps it. When each wins, what you lose at the abstraction boundary, and why it is not actually either/or. With claude-opus-4-8 and claude-sonnet-4-6 examples.

2026-03-29 dotnet dotnet-10 ai

Generative AI for Beginners .NET v2: Rebuilt for .NET 10 with Microsoft.Extensions.AI

Microsoft's free generative AI course for .NET developers ships Version 2, rebuilt for .NET 10 and migrated from Semantic Kernel to Microsoft.Extensions.AI's IChatClient pattern.