Microsoft.Extensions.Http.Diagnostics

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.

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 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

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