Sourced from Microsoft.Extensions.AI.Abstractions's releases.

10.5.0

HTTP Logging Middleware APIs in Microsoft.AspNetCore.Diagnostics.Middleware are now stable. This release also transfers Microsoft.Extensions.VectorData.Abstractions and Microsoft.Extensions.VectorData.ConformanceTests from the Semantic Kernel repository into dotnet/extensions, jumping from 10.1.0 to 10.5.0 for consistent versioning. The release also delivers fixes across the AI libraries, AI Evaluation, and Service Discovery.

Breaking Changes

1. Rename VectorStoreVectorAttribute constructor parameter #​7460
   • The Dimensions parameter was renamed to dimensions (lowercase). This is a source-breaking change only — binary compatibility is preserved.
   • If you use the named argument syntax new VectorStoreVectorAttribute(Dimensions: 1536), update it to new VectorStoreVectorAttribute(dimensions: 1536).

Experimental API Changes

Now Stable

• HTTP Logging Middleware APIs are now stable (previously EXTEXP0013): AddHttpLogEnricher<T>, IHttpLogEnricher, and RequestHeadersLogEnricherOptions.HeadersDataClasses #​7380

What's Changed

AI

• Fix OpenAIResponsesChatClient to respect "store":false in responses #​7417 by @​stephentoub
• Fix InvalidOperationException in CoalesceWebSearchToolCallContent #​7419 by @​stephentoub
• Handle F# optional parameters in AIFunctionFactory schema generation #​7439 by @​eiriktsarpalis
• Fix ComputerCallResponseItem using Item.Id instead of CallId #​7446 by @​jozkee
• Fix HostedFileContent with image MIME type sent as input_file instead of input_image #​7438 by @​stephentoub (co-authored by @​copilot)
• Guard Activity.Current restore with null check in OpenTelemetry streaming clients #​7443 by @​stephentoub (co-authored by @​copilot)
• Enable stateless mode in remote MCP server template (released as v1.2.0 on 2026-04-01) #​7441 by @​jeffhandley

Vector Data

• Move Microsoft.Extensions.VectorData.Abstractions over from Semantic Kernel #​7434 by @​roji
• Rename VectorStoreVectorAttribute dimensions constructor parameter #​7460 by @​roji

AI Evaluation

• Add Path Validation for DiskBasedResponseCache and DiskBasedResultStore #​7397 by @​peterwald
• Update brace-expansion for CVE-2026-33750 #​7457 by @​SamMonoRT

ASP.NET Core Extensions

• Removing experimental attribute from Http logging middleware #​7380 by @​mariamgerges

Service Discovery

• Implement RFC6761 reserved DNS names handling #​6924 by @​rzikm

Documentation Updates

• Remove per-library CHANGELOG.md files #​7413 by @​jeffhandley

Test Improvements

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