Bump Microsoft.Extensions.AI from 10.4.1 to 10.5.1

[dependabot]

Updated Microsoft.Extensions.AI from 10.4.1 to 10.5.1.

Release notes

Sourced from Microsoft.Extensions.AI's releases.

10.5.1

Version 10.5.1 of the Microsoft.Extensions.AI packages stabilizes CodeInterpreter, WebSearch, and ImageGeneration tool content types. The release adds new experimental tool search and OpenAI request policy hooks. And the OpenTelemetry gen-ai semantic conventions are updated to align with v1.41.

The 'aiagent-webapi' project template in Microsoft.Agents.AI.ProjectTemplates is updated to align with v1.3.0 of Agent Framework, updating the OpenTelemetry dependencies within the template projects as well.

Packages in this release

Package	Version
Microsoft.Extensions.AI	10.5.1
Microsoft.Extensions.AI.Abstractions	10.5.1
Microsoft.Extensions.AI.OpenAI	10.5.1
Microsoft.Extensions.AI.Templates	10.5.1-preview.3.26251.3
Microsoft.Agents.AI.ProjectTemplates	1.3.0-preview.1.26251.3

Experimental API Changes

Now Stable

The following types previously emitted the MEAI001 experimental diagnostic and are now stable.

• CodeInterpreter and WebSearch tool content types are now stable #​7493
  • CodeInterpreterToolCallContent
  • CodeInterpreterToolResultContent
  • WebSearchToolCallContent
  • WebSearchToolResultContent
• ImageGeneration tool content types and tool are now stable #​7476
  • ImageGenerationToolCallContent
  • ImageGenerationToolResultContent
  • HostedImageGenerationTool
  • ImageGenerationOptions
  • ImageGenerationResponseFormat (the Hosted enum value remains experimental)
  • IImageGenerator and the rest of the image generation infrastructure also remain experimental

New Experimental APIs

The following new APIs emit the MEAI001 experimental diagnostic.

• New experimental API: HostedToolSearchTool with DeferredTools for tool-search-driven deferred tool loading #​7471
• New experimental API: OpenAIRequestPolicies extension hook for appending System.ClientModel.PipelinePolicy instances to outgoing OpenAI requests #​7495

Breaking Changes to Experimental APIs

• WebSearchToolResultContent.Results was renamed to Outputs as part of the stabilization in #​7493, aligning with CodeInterpreterToolResultContent.Outputs. The original Results property was included in version 10.4.0 and 10.5.0; this is a binary breaking change and consumers need to update to consume the updated property.

  WebSearchToolResultContent content = ...;
  - IList<AIContent>? items = content.Results;
  + IList<AIContent>? items = content.Outputs;

... (truncated)

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

... (truncated)

Commits viewable in compare view.

[dependabot]

Superseded by #16.