# dotnet-1.21.0

Category: agent-infrastructure
Published: 2026-09-11T17:31:35Z
Source: [Microsoft Agent Framework releases](https://github.com/microsoft/agent-framework/releases/tag/dotnet-1.21.0)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-19T00:17:36.805Z
Tags: microsoft, agent-framework, workflow

## Human Summary
Microsoft Agent Framework releases published dotnet-1.21.0. What's Changed .NET: Replace deprecated AWSSDK.Extensions.Bedrock.MEAI with AWS.Bedrock.MEAI by @BenGearset in https://github.com/microsoft/agent-framework/pull/7983 .NET: Remove Azure.AI.OpenAI dependency by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7986 .NET: Track and…

## Agent Summary
Treat dotnet-1.21.0 as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.

## Body
Microsoft Agent Framework releases published dotnet-1.21.0. This release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: What's Changed .NET: Replace deprecated AWSSDK.Extensions.Bedrock.MEAI with AWS.Bedrock.MEAI by @BenGearset in https://github.com/microsoft/agent-framework/pull/7983 .NET: Remove Azure.AI.OpenAI dependency by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7986 .NET: Track and update A2A task state by @SergeyMenshykh in https://github.com/microsoft/agent-framework/pull/7998 .NET: Update Azure AI Projects to 3.0.0 beta 1 by @rogerbarreto in https://github.com/microsoft/agent-framework/pull/7995 .NET: Bump Aspire.Hosting from 13.5.2 to 13.5.3 by @dependabot bot in https://github.com/microsoft/agent-framework/pull/8029 .NET: BREAKING Add file access read lines and move the line-numbering contract onto AgentFileStore by @antsok in https://github.com/microsoft/agent-framework/pull/7671 Bump Anthropic from 12.42.0 to 12.43.0 by @dependabot bot in…

## Recommended actions
- Review the official Microsoft Agent Framework releases release notes before upgrading.
- Check compatibility, migration, and security notes against your current agent stack.
- Run focused regression tests before production rollout.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.