Microsoft Agent Framework .NET 1.27.0 Released With Breaking Changes and Bug Fixes
Source Microsoft Agent Framework releases
At a glance
Version 1.27.0 of Microsoft's Agent Framework for .NET has been released. The release includes new features, breaking changes, and several bug fixes.
Key points
A .NET guidance feature has been added to help developers building with the Agent Framework.
There are breaking changes, so hosted apps must change some configuration methods and how certain APIs are called.
Redirect request handling has changed, so requests redirected to addresses that are not allowed are now blocked with an error.
Several bugs have been fixed, including issues in workflow execution and in calculating citation text positions.
Why it matters
Developers building AI agents with .NET may need to update their existing code, which makes this release important.
Original article
dotnet-1.27.0
Microsoft Agent Framework releases · Oct 31, 2026, 4:12 AM GMT+9 · github.com
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