microsoft/agent-framework dotnet-1.0.0-rc1

dotnet-1.0.0-rc1

Repository: microsoft/agent-framework

Tag: dotnet-1.0.0-rc1

Published: 2026-02-20T03:03:28Z

Prerelease: no

Release notes:

What's Changed

• .NET Workflows - Rename agent-provider and add comments (Declarative Workflows) by @crickman in https://github.com/microsoft/agent-framework/pull/3895
• .NET: [BREAKING] Add session StateBag for state storage and support multiple providers on the Agent by @westey-m in https://github.com/microsoft/agent-framework/pull/3806
• .NET: [Breaking] Structured Output improvements by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/3761
• .NET: Add CreateSessionAsync overload with taskId for A2AAgent session resumption by @Copilot in https://github.com/microsoft/agent-framework/pull/3924
• .NET: Add skill to verify samples by @westey-m in https://github.com/microsoft/agent-framework/pull/3931
• .NET: Fixes for bug bash. by @westey-m in https://github.com/microsoft/agent-framework/pull/3927
• .NET: [BREAKING] Refactor providers to move common functionality to base by @westey-m in https://github.com/microsoft/agent-framework/pull/3900
• .NET: Surface downstream experimental flags and remove unnecessary suppressions by @westey-m in https://github.com/microsoft/agent-framework/pull/3968
• .NET: [BREAKING] Replace Typed Base Providers with Composition by @westey-m in https://github.com/microsoft/agent-framework/pull/3988
• .NET: Fix sample resource path resolution by @westey-m in https://github.com/microsoft/agent-framework/pull/3952
• .NET: Fixing some small issues from bugbash by @westey-m in https://github.com/microsoft/agent-framework/pull/3961
• .NET: Improve session cast error message quality and consistency by @westey-m in https://github.com/microsoft/agent-framework/pull/3973
• .NET Workflows - Add unit tests for RequestExternalInputExecutor by @Copilot in https://github.com/microsoft/agent-framework/pull/3891
• .NET Workflows - Add unit tests for ConditionGroupExecutor by @Copilot in https://github.com/microsoft/agent-framework/pull/3893
• .NET: Open an active item in Solution Explorer in VS Code automatically by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/3992
• .NET Workflows - Add unit tests for QuestionExecutor by @Copilot in https://github.com/microsoft/agent-framework/pull/3892
• .NET: Add additional build, test and project structure skills by @westey-m in https://github.com/microsoft/agent-framework/pull/3987
• .NET: Update Microsoft.Agents.ObjectModel packages to 2026.2.2.1 by @Copilot in https://github.com/microsoft/agent-framework/pull/4003
• .NET: Disable intermittently failing AzureAIAgentsPersistent integration tests by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/3997
• .NET: Inline private RunCoreAsync into the protected one by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/3928
• .NET: Add Foundry Evaluation samples (Safety + Quality) by @Copilot in https://github.com/microsoft/agent-framework/pull/3697
• .NET: Fix MCP samples: update MCP SDK to 0.8.0-preview.1 and fix README references by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/3959
• .NET: BREAKING: Unify AgentResponse[Update] events as WorkflowOutputEvents by @lokitoth in https://github.com/microsoft/agent-framework/pull/3441
• .NET: Support InvokeFunctionTool for declarative workflows by @peibekwe in https://github.com/microsoft/agent-framework/pull/4014
• .NET: Fix FoundryAgents_Step15_ComputerUse sample for Azure Agents API by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/3989
• .NET: Add File Search Sample for Foundry Agents. by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/3990
• .NET: Fixes AgentWithHostedMCP chat fails: ErrorHTTP 404 (: 404) Resource not found by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/3856
• .NET: [BREAKING] Implement Polymorphic Routing by @lokitoth in https://github.com/microsoft/agent-framework/pull/3792
• .NET: Fix CheckpointInfo.Parent always null in InProcessRunner by @lokitoth in https://github.com/microsoft/agent-framework/pull/3812
• .NET: Update AdditionalAIContext sample with simplified implementation by @westey-m in https://github.com/microsoft/agent-framework/pull/4039
• .NET: Add Foundry Agents Tool Sample - OpenAPI Tools by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/3702
• [BREAKING] .NET: Decouple Checkpointing from Run/StreamAsync APIs by @lokitoth in https://github.com/microsoft/agent-framework/pull/4037
• .NET: Updated package versions for RC release by @dmytrostruk in https://github.com/microsoft/agent-framework/pull/4067
• .NET: Add tweaks to .net agent skills by @westey-m in https://github.com/microsoft/agent-framework/pull/4081
• .NET: Support a message only AIContextProvider as an AIAgent Decorator by @westey-m in https://github.com/microsoft/agent-framework/pull/4009
• .NET: Remove FunctionCalls and Tool Messages from Handoff passed messages by @lokitoth in https://github.com/microsoft/agent-framework/pull/3811
• .NET: Small fixes in README by @dmytrostruk in https://github.com/microsoft/agent-framework/pull/4099
• .NET: [BREAKING] Workflows API Review Naming Changes (Part 1?) by @lokitoth in https://github.com/microsoft/agent-framework/pull/4090

Full Changelog: https://github.com/microsoft/agent-framework/compare/dotnet-1.0.0-preview.260212.1...dotnet-1.0.0-rc1