v10.9.0

Version 10.9.0 is headlined by changes in these areas:

• AI: New experimental routing APIs center on the abstract RoutingChatClient base class, with SemanticRoutingChatClient as a concrete semantic-routing implementation. Separately, the abstract FailoverChatClient specialization and its concrete OrderedFailoverChatClient implementation add failover routing.
• AI Evaluation: The generated report gains redesigned Overview, Cases, History, and Comparison views.
• ASP.NET Core and HTTP diagnostics: The release adds HTTP request latency log enrichment and fixes configuration binding, response-body logging, request-path redaction, and resilience package version handling.
• Source-generated logging and service discovery: Fixes cover classification type qualification, thread-local state cleanup, and DNS query suffix handling.

Experimental API Changes

New Experimental APIs

• New experimental API: HTTP request latency log enrichment (EXTEXP0013) #7602
• New experimental API: Chat client routing and failover (MEAI001) #7662

What's Changed

AI (Microsoft.Extensions.AI, Microsoft.Extensions.AI.Abstractions, and Microsoft.Extensions.AI.OpenAI)

• Add extensible chat client routing #7662 by @joshuajyue (co-authored by @Copilot)
• Pass the request's options to the selected client #7685 by @joshuajyue (co-authored by @jozkee @Copilot)
• AI.Abstractions: fix ExcludeFromSchema dropped under concurrent AIFunction creation #7677 by @jozkee (co-authored by @Copilot)
• Cap OpenAI dependency version (b10f9c0) by @jeffhandley (co-authored by @Copilot)

Note: Microsoft.Extensions.AI.OpenAI constrains its dependency for OpenAI to 2.12.x, preventing OpenAI updates to 2.13.0+ due to an incompatibility. We expect to release Microsoft.Extensions.AI.OpenAI version 10.9.1 during the week of August 17 to address this issue.

HTTP Resilience and Diagnostics (Microsoft.Extensions.Http.Resilience and Microsoft.Extensions.Http.Diagnostics)

• Fix Grpc.Net.ClientFactory version range check - Fixes #7565 #7566 by @Ghost93
• Fix response body logging under debugger #7678 by @Rimobul
• Redact outgoing path when route is unknown #7687 by @Rimobul
• Fix HTTP client logging config binding #7691 by @Rimobul

ASP.NET Core Extensions (Microsoft.AspNetCore.Diagnostics.Middleware)

• Rename HttpLatencyTelemetry extensions class and drop redundant TFM guard #7645 by @EasyL0ver (co-authored by @Copilot)
• Add HTTP request latency log enricher (experimental) #7602 by @EasyL0ver (co-authored by @Copilot)

Logging Source Generator (Microsoft.Gen.Logging)

• [Microsoft.Gen.Logging] Clear thread-local state when logging throws #7682 by @Rimobul
• [Microsoft.Gen.Logging] Fully qualify classification types #7689 by @Rimobul

AI Evaluation (Microsoft.Extensions.AI.Evaluation.Reporting)

• [Microsoft.Extensions.AI.Evaluation.Reporting] Evaluation report redesign #7609 by @grafanaKibana

Project Templates (Microsoft.McpServer.ProjectTemplates)

• Remove MCP server project template #7680 by @jeffhandley (co-authored by @Copilot)

Note: The MCP server project template was migrated to the dotnet/aspnetcore repository, and it is now included in the .NET 10 and .NET 11 SDKs.

Service Discovery (Microsoft.Extensions.ServiceDiscovery.Dns)

• Fix DNS SRV provider ignoring query suffix #7688 by @Rimobul (co-authored by @Copilot)

Test Improvements

• Update Microsoft.Data.SqlClient test dependency (aaea3c8) by @jeffhandley (co-authored by @Copilot)

Repository Infrastructure Updates

• [main] Update dependencies from dotnet/arcade #7621
• Merge release/10.8 into main #7632 by @jeffhandley (co-authored by @jozkee @Copilot)
• Add agentic workflows that keep Microsoft.Extensions.AI aligned with OpenTelemetry GenAI semantic-conventions #7611 by @jeffhandley (co-authored by @Copilot)
• Bump brace-expansion, eslint and tfx-cli in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7648
• Add a release-manager agent for the dotnet/extensions release process #7643 by @jeffhandley (co-authored by @Copilot)
• Bump CommunityToolkit.VectorData package baselines to 1.0.0 / 1.0.0-preview #7651 by @adamsitnik (co-authored by @Copilot)
• Incorporate servicing release experience into release-manager playbooks #7656 by @jeffhandley (co-authored by @Copilot)
• Bump dotnet-reportgenerator-globaltool from 5.5.10 to 5.5.11 #7666
• Bump adm-zip and azure-pipelines-task-lib in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/tasks/PublishAIEvaluationReport #7652
• Bump postcss from 8.5.15 to 8.5.23 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7660
• Bump PowerShell from 7.6.3 to 7.6.4 #7650
• [main] Update dependencies from dotnet/arcade #7644
• [release-manager] Require package dependency closure for releases #7693 by @jeffhandley (co-authored by @Copilot)
• Optionally allow official builds to publish VSIX extension. #7692 by @peterwald
• [main] Update dependencies from dotnet/arcade #7690

Acknowledgements

• @EasyL0ver made their first contribution in #7602
• @Ghost93 made their first contribution in #7566
• @grafanaKibana made their first contribution in #7609
• @Rimobul made their first contribution in #7678
• @joshuajyue made their first contribution in #7662
• @Ghost93 submitted issue #7565 (resolved by #7566)
• @grafanaKibana submitted issue #7593 (resolved by #7609)
• @jredgard submitted issue #7675 (resolved by #7677)
• @viorelbuligadev submitted issue #7649 (resolved by #7678)
• @joshuajyue submitted issue #7647 (resolved by #7662)
• @jboelter submitted issue #7634 (resolved by #7682)
• @dmeeze submitted issue #7157 (resolved by #7689)
• @ssmelov submitted issue #7536 (resolved by #7687)
• @Marcus-Kanon submitted issue #7551 (resolved by #7691)
• @vermilion submitted issue #7175 (resolved by #7688)
• @evgenyfedorov2 @wtgodbe @shyamnamboodiripad @dariusclay @iliar-turdushev @mariamgerges @PranavSenthilnathan @rafal-mz @tannergooding @tarekgh reviewed pull requests

Full Changelog: v10.8.4...v10.9.0

Packages in this release

Package	Version
Microsoft.AspNetCore.Testing	10.9.0
Microsoft.Extensions.AI.Abstractions	10.9.0
Microsoft.Extensions.AI.Evaluation.Console	10.9.0
Microsoft.Extensions.AI.Templates	10.9.0-preview.3.26411.16
Microsoft.Extensions.AmbientMetadata.Application	10.9.0
Microsoft.Extensions.AmbientMetadata.Build	10.9.0
Microsoft.Extensions.AuditReports	10.9.0
Microsoft.Extensions.Caching.Hybrid	10.9.0
Microsoft.Extensions.Compliance.Abstractions	10.9.0
Microsoft.Extensions.DataIngestion.Abstractions	10.9.0-preview.1.26411.16
Microsoft.Extensions.DependencyInjection.AutoActivation	10.9.0
Microsoft.Extensions.Diagnostics.ExceptionSummarization	10.9.0
Microsoft.Extensions.ObjectPool.DependencyInjection	10.9.0
Microsoft.Extensions.Options.Contextual	10.9.0-preview.1.26411.16
Microsoft.Extensions.ServiceDiscovery.Abstractions	10.9.0
Microsoft.Extensions.StaticAnalysis	10.9.0
Microsoft.Extensions.TimeProvider.Testing	10.9.0
Microsoft.Extensions.AI	10.9.0
Microsoft.Extensions.AI.Evaluation	10.9.0
Microsoft.Extensions.AI.OpenAI	10.9.0
Microsoft.Extensions.AsyncState	10.9.0
Microsoft.Extensions.Compliance.Redaction	10.9.0
Microsoft.Extensions.Compliance.Testing	10.9.0
Microsoft.Extensions.DataIngestion.Markdig	10.9.0-preview.1.26411.16
Microsoft.Extensions.DataIngestion.MarkItDown	10.9.0-preview.1.26411.16
Microsoft.Extensions.ServiceDiscovery	10.9.0
Microsoft.Extensions.Telemetry.Abstractions	10.9.0
Microsoft.Extensions.VectorData.Abstractions	10.9.0
Microsoft.AspNetCore.AsyncState	10.9.0
Microsoft.AspNetCore.HeaderParsing	10.9.0
Microsoft.Extensions.AI.Evaluation.NLP	10.9.0-preview.1.26411.16
Microsoft.Extensions.AI.Evaluation.Quality	10.9.0
Microsoft.Extensions.AI.Evaluation.Reporting	10.9.0
Microsoft.Extensions.AI.Evaluation.Safety	10.9.0-preview.1.26411.16
Microsoft.Extensions.DataIngestion	10.9.0-preview.1.26411.16
Microsoft.Extensions.Diagnostics.HealthChecks.Common	10.9.0
Microsoft.Extensions.Diagnostics.Probes	10.9.0-preview.1.26411.16
Microsoft.Extensions.Diagnostics.ResourceMonitoring	10.9.0
Microsoft.Extensions.Diagnostics.Testing	10.9.0
Microsoft.Extensions.Resilience	10.9.0
Microsoft.Extensions.ServiceDiscovery.Dns	10.9.0
Microsoft.Extensions.ServiceDiscovery.Yarp	10.9.0
Microsoft.Extensions.Telemetry	10.9.0
Microsoft.Extensions.VectorData.ConformanceTests	10.9.0
Microsoft.AspNetCore.Diagnostics.Middleware	10.9.0
Microsoft.Extensions.AI.Evaluation.Reporting.Azure	10.9.0
Microsoft.Extensions.Diagnostics.HealthChecks.ResourceUtilization	10.9.0
Microsoft.Extensions.Diagnostics.ResourceMonitoring.Kubernetes	10.9.0
Microsoft.Extensions.Hosting.Testing	10.9.0-preview.1.26411.16
Microsoft.Extensions.Http.Diagnostics	10.9.0
Microsoft.Extensions.Http.Resilience	10.9.0

The Microsoft.Agents.AI.ProjectTemplates package is not included in this release.

v10.8.4

This servicing update refreshes the .NET AI project templates ahead of the July 30, 2026 retirement of GitHub Models — removing the GitHub Models provider option and updating template dependencies.

As a result, both the AI Chat Web (aichatweb) and AI Agent Web API (aiagent-webapi) templates now require the AI service provider to be chosen explicitly via --provider; there is no longer a default. One of the following must be selected:

• --provider azureopenai — Azure OpenAI
• --provider ollama — Ollama (for local development)
• --provider openai — OpenAI Platform

Packages in this release

Package	Version
Microsoft.Extensions.AI.Templates	10.8.4-preview.3.26379.3
Microsoft.Agents.AI.ProjectTemplates	1.13.0-preview.1.26379.3

What's Changed

Project templates

• Removed the GitHub Models provider from the AI Chat Web and AI Agent Web API templates, ahead of GitHub Models being fully retired on July 30, 2026. The --provider option is now required with no default (#7667).
• Updated AI template dependencies — bumped Aspire.Hosting.AppHost to 13.4.6 and CommunityToolkit.VectorData.SqliteVec to 1.0.0-preview.4 (aligned System.Linq.AsyncEnumerable to 10.0.9), replacing earlier workaround package pins (#7639).

Full Changelog

• v10.8.3...v10.8.4

v10.8.3

Packages in this release

Package	Version
Microsoft.Extensions.AI	10.8.3
Microsoft.Extensions.AI.Abstractions	10.8.3
Microsoft.Extensions.AI.OpenAI	10.8.3

Experimental API Changes

Experimental API behavior updates

• Updated serialization behavior for experimental ToolApprovalRequestContent.RequiresConfirmation so it no longer leaks into consumer source-generated AIContent JSON metadata unless approval APIs are intentionally used (#7659).

What's Changed

AI abstractions and serialization

• Fixed MEAI001 leakage from RequiresConfirmation in source-generated AIContent contexts by using an internal JSON-included backing member while keeping the public experimental member ignored for source-generation metadata (#7659).

Test Improvements

• Added stabilization regression coverage to verify consumer source-generated List<AIContent> contexts compile and round-trip without requiring MEAI001 suppression (#7659).

Full Changelog

• v10.8.2...v10.8.3

v10.8.2

This servicing release updates Microsoft.Extensions.VectorData.ConformanceTests to 10.8.2 and includes targeted test framework migration fixes.

Packages in this release

Package	Version	Note
Microsoft.Extensions.VectorData.Abstractions	10.8.2	Published August 7, 2026
Microsoft.Extensions.VectorData.ConformanceTests	10.8.2

Update: August 7, 2026
The Microsoft.Extensions.VectorData.Abstractions package was initially excluded from this release by mistake. Because Microsoft.Extensions.VectorData.ConformanceTests has a dependency on Microsoft.Extensions.VectorData.Abstractions, that led to failures when updating to Microsoft.Extensions.VectorData.ConformanceTests 10.8.2.

Microsoft.Extensions.VectorData.Abstractions was published August 7, 2026 to resolve that issue.

What's Changed

AI

• Move Microsoft.Extensions.VectorData.ConformanceTests to xUnit 3 #7636 by @adamsitnik (co-authored by @Copilot)

Acknowledgements

• @roji reviewed pull requests

Full Changelog: v10.8.1...v10.8.2

v10.8.1

This servicing release updates the Microsoft.Extensions.AI, Microsoft.Extensions.AI.Abstractions, and Microsoft.Extensions.AI.OpenAI packages to 10.8.1 with two targeted fixes: correct tool-call/tool-result ordering when resuming approval-gated functions with service-managed chat history, and preservation of the OpenAI Responses reasoning item id for stateless (store=false) encrypted reasoning.

Packages in this release

Package	Version
Microsoft.Extensions.AI	10.8.1
Microsoft.Extensions.AI.Abstractions	10.8.1
Microsoft.Extensions.AI.OpenAI	10.8.1

What's Changed

AI

• Fix FICC tool_calls/tool ordering with approvals and service-managed chat history #7617 by @westey-m
• Roundtrip OpenAI Responses reasoning item id for stateless (store=false) encrypted reasoning #7629 by @rogerbarreto (co-authored by @tarekgh)

Acknowledgements

• @jozkee reviewed pull requests

Full Changelog: v10.8.0...v10.8.1

v10.8.0

This release adds new experimental APIs to Microsoft.Extensions.AI.Abstractions and updates the OpenAI dependency to 2.12.0, alongside documentation, test, and repository maintenance.

Experimental API Changes

New Experimental APIs

• New experimental API: AIFunctionNameAttribute and AIParameterNameAttribute #7610 by @jozkee (co-authored by @jeffhandley @Copilot)
• New experimental API: ToolApprovalRequestContent.RequiresConfirmation (MEAI001) #7549 by @javiercn (co-authored by @Copilot)

What's Changed

AI

• Upgrade OpenAI dependency to 2.12.0 #7608 by @jozkee (co-authored by @Copilot)
• Auto-detect audio format in OpenAISpeechToTextClient #7575 by @jozkee (co-authored by @Copilot)
• Fix ImageGeneratingChatClient duplicating preceding content and dropping following content #7624 by @jozkee (co-authored by @Copilot)

Vector Data

• Make all test methods virtual in VectorData.ConformanceTests #7606 by @adamsitnik (co-authored by @Copilot)

Documentation Updates

• Remove links to ai-samples repo #7574 by @gewarren
• Fix up docs with Copilot (MEVD) #7597 by @gewarren
• Fix up docs with Copilot (M.E.ServiceDiscovery) #7598 by @gewarren (co-authored by @Copilot)
• Fix up docs with Copilot (MEAI) #7600 by @gewarren
• Fix up docs with Copilot #7601 by @gewarren

Test Improvements

• Fix flaky StampedeTests and harden related test waits #7572 by @jeffhandley (co-authored by @Copilot)
• Fix SQLitePCLRaw.lib.e_sqlite3 vulnerability by replacing SemanticKernel connectors with CommunityToolkit #7579 by @adamsitnik (co-authored by @Copilot)
• Removing SemanticKernel Connectors dependency and replacing it #7584 by @adamsitnik (co-authored by @Copilot)
• Migrate to xUnit v3 #7607 by @adamsitnik (co-authored by @shyamnamboodiripad @Copilot)

Repository Infrastructure Updates

• Update OTel GenAI conventions skill for standalone semconv-genai repo #7519 by @jeffhandley (co-authored by @Copilot)
• Bump dotnet-coverage from 18.7.0 to 18.8.0 #7552
• [main] Update dependencies from dotnet/arcade #7559
• Fix transitive MessagePack vulnerability in AI template AppHost projects #7561 by @adamsitnik (co-authored by @Copilot)
• Bump esbuild, @vitejs/plugin-react and vite in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7564
• Bump tmp from 0.2.6 to 0.2.7 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7569
• Bump js-yaml from 4.1.1 to 4.2.0 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7570
• Bump PowerShell from 7.6.2 to 7.6.3 #7576
• Remove duplicate 'WebAPI' classification from template #7577 by @danroth27
• [main] Update dependencies from dotnet/arcade #7590
• Eliminate redundant Correctness CI stage by merging into Build #7594 by @adamsitnik (co-authored by @Copilot)
• Update Agent Framework to 1.13.0 #7613 by @jeffhandley (co-authored by @Copilot)
• Bump dotnet-coverage from 18.8.0 to 18.9.0 #7615

Acknowledgements

• @wtgodbe @tarekgh @eiriktsarpalis @peterwald @PranavSenthilnathan @stephentoub @evgenyfedorov2 @roji @DeagleGross reviewed pull requests

Full Changelog: v10.7.0...v10.8.0

v10.7.0

v10.7.0 graduates the Microsoft.Extensions.Diagnostics.ResourceMonitoring.Kubernetes package to stable. The package registers a Kubernetes-aware ResourceQuotaProvider that reads the pod's CPU and memory requests and limits and exposes them to Microsoft.Extensions.Diagnostics.ResourceMonitoring as baseline and maximum quotas, which then feed the request and limit dimensions of the published resource utilization metrics. The companion ResourceQuota and ResourceQuotaProvider types in Microsoft.Extensions.Diagnostics.ResourceMonitoring graduate to stable in the same change so that consumers can implement custom quota providers without taking an experimental dependency.

On the AI side, Microsoft.Extensions.AI.OpenAI moves to OpenAI 2.11.0 and fixes a deserialization bug in ToolJson.AdditionalProperties so that JSON Schema additionalProperties values shaped as sub-schema objects (for example {"type":"string"}) are preserved instead of throwing during deserialization. HostedFileContent.SizeInBytes and HostedFileContent.CreatedAt graduate to stable since both values are consistently available across hosted-file providers, while Purpose and Scope remain experimental as provider-shaped vocabulary. FunctionInvokingChatClient drops a backward-compat path that auto-marked ToolApprovalResponseContent entries with InformationalOnly: true; consumers that need to continue accepting sessions serialized before #7468 can use the sample ApprovalHistoryNormalizingChatClient middleware added in the test project.

Experimental API Changes

Now Stable

• Microsoft.Extensions.Diagnostics.ResourceMonitoring.Kubernetes package is now stable #7253
• Resource Monitoring ResourceQuota and ResourceQuotaProvider APIs are now stable (previously EXTEXP0008) #7253
• HostedFileContent.SizeInBytes and HostedFileContent.CreatedAt are now stable (previously MEAI001) #7513

What's Changed

AI

• Graduate HostedFileContent.SizeInBytes and HostedFileContent.CreatedAt #7513 by @jozkee (co-authored by @Copilot)
• Remove backward-compat InformationalOnly case from FICC; suggest middleware workaround #7538 by @jozkee (co-authored by @Copilot)
• Upgrade OpenAI package from 2.10.0 to 2.11.0 #7544 by @jozkee (co-authored by @Copilot)
• Fix ToolJson.AdditionalProperties to accept sub-schema objects #7546 by @jozkee (co-authored by @Copilot)

Diagnostics, Health Checks, and Resource Monitoring

• Move Microsoft.Extensions.Diagnostics.ResourceMonitoring.Kubernetes to stable #7253 by @amadeuszl (co-authored by @Copilot)

Repository Infrastructure Updates

• [main] Update dependencies from dotnet/arcade #7521
• Bump dotnet-reportgenerator-globaltool from 5.5.9 to 5.5.10 #7522
• Bump dotnet-coverage from 18.6.2 to 18.7.0 #7530
• Bump PowerShell from 7.6.1 to 7.6.2 #7531
• Bump qs from 6.15.1 to 6.15.2 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7532
• [main] Update dependencies from dotnet/arcade #7534
• Bump tmp from 0.2.5 to 0.2.6 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7537

Acknowledgements

• @ericstj submitted issue #7509 (resolved by #7544)
• @scottt732 submitted issue #7540 (resolved by #7546)
• @DeagleGross @wtgodbe @dariusclay @evgenyfedorov2 @peterwald @PranavSenthilnathan @shyamnamboodiripad @stephentoub @tarekgh reviewed pull requests

Full Changelog: v10.6.0...v10.7.0

v10.6.0

Version 10.6.0 stabilizes the response continuation token and background-response APIs in Microsoft.Extensions.AI.Abstractions. Most other AI work for May shipped in 10.5.1; this monthly release rolls those changes up alongside dependency updates and a small Resource Monitoring cleanup.

Experimental API Changes

Now Stable

• ResponseContinuationToken and background-response APIs are now stable (previously MEAI001) #7512

What's Changed

AI

• Stabilize ResponseContinuationToken / background-response APIs #7512 by @jozkee (co-authored by @Copilot)

Repository Infrastructure Updates

• Update version to 10.6.0 #7458 by @jeffhandley
• [main] Update dependencies from dotnet/arcade #7451
• Bump follow-redirects from 1.15.11 to 1.16.0 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript/azure-devops-report/tasks/PublishAIEvaluationReport #7469
• Merge release/10.5 into main #7470 by @jeffhandley
• Bump microsoft.visualstudio.slngen.tool from 12.0.13 to 12.0.32 #7484
• Bump postcss from 8.5.9 to 8.5.12 in /src/Libraries/Microsoft.Extensions.AI.Evaluation.Reporting/TypeScript #7494
• Bump dotnet-reportgenerator-globaltool from 5.5.7 to 5.5.9 #7504
• Rename release-notes skill to write-release-notes #7511 by @jeffhandley (co-authored by @Copilot)

Acknowledgements

• @wtgodbe @tarekgh @peterwald @JeremyLikness @eiriktsarpalis @ericstj @evgenyfedorov2 reviewed pull requests

Full Changelog: v10.5.2...v10.6.0

v10.5.2

This patch release ships a single fix to Microsoft.Extensions.VectorData.Abstractions, correcting StorageName resolution when external serialization is enabled. Microsoft.Extensions.VectorData.ConformanceTests, Microsoft.Extensions.AI.Abstractions, Microsoft.Extensions.AI, and Microsoft.Extensions.AI.OpenAI are published alongside it for version coherency — they contain no code changes from 10.5.1.

Packages in this release

Package	Version
Microsoft.Extensions.VectorData.Abstractions	10.5.2
Microsoft.Extensions.VectorData.ConformanceTests	10.5.2
Microsoft.Extensions.AI.Abstractions	10.5.2
Microsoft.Extensions.AI	10.5.2
Microsoft.Extensions.AI.OpenAI	10.5.2

What's Changed

Microsoft.Extensions.VectorData.Abstractions

• Minor fixes to MEVD.Abstractions: correct StorageName behavior when external serialization is enabled, and disable a warning for net462. (by @roji in #7475)

Full Changelog: v10.5.1...v10.5.2

v10.5.1

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;

What's Changed

AI

• Stabilize CodeInterpreter and WebSearch content types #7493 by @jozkee (co-authored by @Copilot)
• Stabilize ImageGeneration content types and HostedImageGenerationTool #7476 by @jozkee (co-authored by @Copilot)
• HostedToolSearchTool with DeferredTools in the type #7471 by @jozkee (co-authored by @Copilot @stephentoub)
• Add OpenAIRequestPolicies extension hook for MEAI OpenAI clients #7495 by @rogerbarreto
• Update OpenTelemetry gen-ai conventions through v1.41 #7497 by @jeffhandley (co-authored by @Copilot)
• Bump the project template package reference versions for OpenTelemetry and Agent Framework #7491 by @jeffhandley
• Honor UnmappedMemberHandling in AIFunctionFactory parameter binding #7474 by @eiriktsarpalis (co-authored by @Copilot)
• Fix Namespace gaps in HostedToolSearchTool #7500 by @jozkee (co-authored by @Copilot)
• Fix: Mark both TARC and TAResp FunctionCallContent as InformationalOnly after approval processing #7468 by @westey-m (co-authored by @Copilot)

Test Improvements

• Fix flaky tests: remove process-wide Directory.SetCurrentDirectory and anchor cwd assertions to absolute paths #7487 by @jozkee (co-authored by @Copilot)

Repository Infrastructure Updates

• Bump dotnet-reportgenerator-globaltool from 5.1.19 to 5.5.7 #7489
• Bump dotnet-coverage from 17.8.2 to 18.6.2 #7481
• Bump Microsoft.Build.Traversal from 3.2.0 to 4.1.82 #7483
• Bump PowerShell from 7.3.3 to 7.6.1 #7485

Acknowledgements

• @peterwald @ericstj @tarekgh @wtgodbe @evgenyfedorov2 @lokitoth @mikekistler reviewed pull requests

Full Changelog: v10.5.0...v10.5.1