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.NET: Migrate A2A agent to A2A SDK v1 - #4890

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SergeyMenshykh wants to merge 12 commits into
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SergeyMenshykh:migrate-a2a-agent-to-a2-sdk-v1
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.NET: Migrate A2A agent to A2A SDK v1#4890
SergeyMenshykh wants to merge 12 commits into
microsoft:mainfrom
SergeyMenshykh:migrate-a2a-agent-to-a2-sdk-v1

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@SergeyMenshykh

@SergeyMenshykh SergeyMenshykh commented Mar 24, 2026 •
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Migrate A2A packages from 0.3.4-preview to 1.0.0-preview and adapt all consuming code to the SDK v1 API changes.

Key changes

  • Update A2A and A2A.AspNetCore package versions
  • Adapt to SDK v1 type renames (e.g. AgentMessage → Message, MessageRole → Role, TextPart/FilePart → Part)
  • Adapt to SDK v1 response union types (SendMessageResponse, StreamResponse)
  • Set SendMessageConfiguration.Blocking based on AllowBackgroundResponses option
  • Implement streaming continuation via SubscribeToTaskAsync (previously threw NotSupportedException)
  • Update samples, hosting, extensions, and all unit/integration tests

@markwallace-microsoft markwallace-microsoft added the .NET Usage: [Issues, PRs], Target: .Net label Mar 24, 2026
@github-actions github-actions Bot changed the title Migrate A2A agent to A2A SDK v1 .NET: Migrate A2A agent to A2A SDK v1 Mar 24, 2026
@SergeyMenshykh SergeyMenshykh self-assigned this Mar 24, 2026
@SergeyMenshykh SergeyMenshykh moved this to In Progress in Agent Framework Mar 24, 2026
@markwallace-microsoft markwallace-microsoft added the documentation Usage: [Issues, PRs], Target: documentation in the code base and learn docs label Mar 26, 2026
@github-project-automation github-project-automation Bot moved this from In Progress to Done in Agent Framework Apr 23, 2026
@SergeyMenshykh

SergeyMenshykh commented Apr 23, 2026

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Superseded by: #5423

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documentation Usage: [Issues, PRs], Target: documentation in the code base and learn docs .NET Usage: [Issues, PRs], Target: .Net

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@SergeyMenshykh @markwallace-microsoft