Microsoft releases .NET SDK for AG-UI agent-user interaction protocol
InfoWorld ·
Microsoft on September 25 announced a .NET SDK for AG-UI (Agent-User Interaction). Created in collaboration with CopilotKit , the new SDK allows C# developers to work with the protocol that standardizes how agents communicate with user-facing applications. The .NET SDK for AG-UI lives in the AG-UI repository alongside the TypeScript and Python SDKs, and is published on NuGet under the MIT license. Its C# implementation of AG-UI is usable from any .NET service, Microsoft said. AG-UI support for .NET in the Microsoft Agent Framework (MAF) is now based on the .NET SDK for AG-UI, the company added. AG-UI is an event-based protocol that allows AI agents to interact with front-end applications. A back end emits AG-UI events natively, and a client consumes them from an agent written in any supported language. The protocol includes events in eight different categories, according to the documentation : Life-cycle events monitor the progression of agent runs. Text message events handle streaming textual content. Tool call events manage tool executions by agents. State management events synchronize state between agents and UI. Activity events represent ongoing activity progress. Subagent events track subagents and attribute their output. Special events support custom functionality. Draft events propose events under development. The .NET SDK for AG-UI works in both directions, Microsoft said. AGUI.Server turns an agent into an AG-UI endpoint and AGUI.Client enables a .NET application to consume an AG-UI endpoint. AGUI.Server and AGUI.Client are built on a common set of AG-UI primitives. The .NET SDK for AG-UI ships as five packages on NuGet : AGUI.Abstractions — protocol events, messages, tools, capabilities, and JSON serialization. AGUI.Formatting — event stream formatter abstractions and Server-Sent Events support. AGUI.Protobuf — protobuf codec and binary event stream formatting. AGUI.Client — AG-UI HTTP client and IChatClient integration. AGUI.Server — server-side adapter from ChatResponseUpdate streams to AG-UI events. Microsoft offered the following links for getting started: AG-UI .NET SDK source and samples AG-UI documentation CopilotKit’s AG-UI .NET SDK post Agent Framework AG-UI documentation on Microsoft Learn Microsoft Agent Framework migration notes The company welcomes questions and feedback about the SDK in the AG-UI repository . It asks that questions about Microsoft Agent Framework integration be directed to the Microsoft Agent Framework discussion boards .
Microsoft on September 25 announced a .NET SDK for AG-UI (Agent-User Interaction). Created in collaboration with CopilotKit , the new SDK allows C# developers to work with the protocol that standardizes how agents communicate with user-facing applications. The .NET SDK for AG-UI lives in the AG-UI repository alongside the TypeScript and Python SDKs, and is published on NuGet under the MIT license. Its C# implementation of AG-UI is usable from any .NET service, Microsoft said. AG-UI support for .NET in the Microsoft Agent Framework (MAF) is now based on the .NET SDK for AG-UI, the company added. AG-UI is an event-based protocol that allows AI agents to interact with front-end applications. A back end emits AG-UI events natively, and a client consumes them from an agent written in any supported language. The protocol includes events in eight different categories, according to the documentation : Life-cycle events monitor the progression of agent runs. Text message events handle streaming textual content. Tool call events manage tool executions by agents. State management events synchronize state between agents and UI. Activity events represent ongoing activity progress. Subagent events track subagents and attribute their output. Special events support custom functionality. Draft events propose events under development. The .NET SDK for AG-UI works in both directions, Microsoft said. AGUI.Server turns an agent into an AG-UI endpoint and AGUI.Client enables a .NET application to consume an AG-UI endpoint. AGUI.Server and AGUI.Client are built on a common set of AG-UI primitives. The .NET SDK for AG-UI ships as five packages on NuGet : AGUI.Abstractions — protocol events, messages, tools, capabilities, and JSON serialization. AGUI.Formatting — event stream formatter abstractions and Server-Sent Events support. AGUI.Protobuf — protobuf codec and binary event stream formatting. AGUI.Client — AG-UI HTTP client and IChatClient integration. AGUI.Server — server-side adapter from ChatResponseUpdate streams to AG-UI events. Microsoft offered the following links for getting started: AG-UI .NET SDK source and samples AG-UI documentation CopilotKit’s AG-UI .NET SDK post Agent Framework AG-UI documentation on Microsoft Learn Microsoft Agent Framework migration notes The company welcomes questions and feedback about the SDK in the AG-UI repository . It asks that questions about Microsoft Agent Framework integration be directed to the Microsoft Agent Framework discussion boards .