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Add ASP.NET Core .NET 11 Preview 2 release notes include files#36856

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Mar 10, 2026
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Add ASP.NET Core .NET 11 Preview 2 release notes include files#36856
wadepickett merged 10 commits intomainfrom
copilot/create-include-files-release-notes

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Copilot AI commented Mar 10, 2026

  • Create include files for Preview 2 release notes
  • Wire include files into aspnetcore-11.md with [!INCLUDE] directives
  • Update metadata (ms.date, ai-usage)
  • Verify all include files are at correct path: aspnetcore/release-notes/aspnetcore-11/includes/
  • Remove all source code PR links (e.g., dotnet/aspnetcore#64851) from include files
  • Rename include files from -p2 to -preview2 suffix for complete words
Original prompt

This section details on the original issue you should resolve

<issue_title>What's New Automation</issue_title>
<issue_description>### Description

Automation prompt for Copilot for creating draft What's New PR from Release Notes output:

Task: Create Include Files for ASP.NET Core .NET 11 Preview 2 Release Notes

Context

The dotnet/core repository contains per-preview release notes, such as:
release-notes/11.0/preview/preview2/aspnetcore.md

The dotnet/AspNetCore.Docs repository contains a cumulative "What's New in ASP.NET Core in .NET 11" article at:
aspnetcore/release-notes/aspnetcore-11.md

This What's New article is organized by product area (e.g., "Authentication and authorization", "Performance", etc.) and uses Markdown include directives to pull in individual feature descriptions from:
aspnetcore/release-notes/aspnetcore-11/includes/<feature-name>.md

Each include file describes a single feature or change. For example:

[!INCLUDE[](~/release-notes/aspnetcore-11/includes/identity-time-provider.md)]

Source

The Preview 2 ASP.NET Core release notes from dotnet/core at branch dotnet11-preview2:
release-notes/11.0/preview/preview2/aspnetcore.md

Instructions

  1. Create new include files in dotnet/AspNetCore.Docs at:
    aspnetcore/release-notes/aspnetcore-11/includes/

  2. Naming convention: Follow the existing naming pattern (lowercase, hyphenated, descriptive) and append -p2 to each filename to indicate it originated from Preview 2. Example:
    native-otel-tracing-p2.md

  3. One include file per feature/section, except performance improvements which should be combined into a single performance-improvements-p2.md file.

  4. Exclusions:

    • Blazor: Do not create include files for any Blazor-related features or changes (e.g., "TempData support for Blazor"). Those will be handled separately later.
    • Bug fixes: Do not create include files for the bug fixes section.
    • Community contributors list: Do not create a standalone include file for the community contributors section.
  5. Preserve community contributor thank-yous: If a feature or improvement section in the release notes thanks a community contributor inline (e.g., "Thank you @baywet for this contribution!"), keep that acknowledgment in the corresponding include file.

  6. Preserve breaking change designations: If a section is marked as a "Breaking Change" (e.g., OpenAPI 3.2.0), preserve that designation in the include file content.

  7. Remove preview-specific references: Do not include references to the specific preview number (e.g., "Preview 2") in the include file content. The What's New article is presented as a cumulative announcement of what's new in ASP.NET Core in .NET 11 as a whole, not tied to individual previews.

  8. Content adaptation: Adapt the release note content for the include file format — these are meant to be embedded in a larger article, so they should read as self-contained sections (use ### headings, not ## or #). Follow the style and tone of existing include files in the repository.

  9. Update aspnetcore-11.md: Add [!INCLUDE[](~/release-notes/aspnetcore-11/includes/<filename>.md)] directives for each new include file in the appropriate product area section of the What's New article. Place new includes after any existing includes within each section, following the established format.

Page URL

https://learn.microsoft.com/en-us/aspnet/core/release-notes/aspnetcore-11?view=aspnetcore-10.0&tabs=minimal-apis

Content source URL

https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/release-notes/aspnetcore-11.md

Document ID

5f749050-bd63-c782-f5a6-834dbaa7a1bc

Platform Id

e8eaff50-8e78-f831-b4d1-c5309fcb547e

Article author

@wadepickett

Metadata

  • ID: 5f749050-bd63-c782-f5a6-834dbaa7a1bc
  • PlatformId: e8eaff50-8e78-f831-b4d1-c5309fcb547e
  • Service: aspnet-core
  • Sub-service: release-notes

Related Issues</issue_description>

Comments on the Issue (you are @copilot in this section)


💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.


Internal previews

📄 File 🔗 Preview link
aspnetcore/release-notes/aspnetcore-11.md What's new in ASP.NET Core in .NET 11

Copilot AI and others added 2 commits March 10, 2026 17:34
Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
@wadepickett wadepickett self-requested a review March 10, 2026 17:35
Copilot AI changed the title [WIP] Add include files for ASP.NET Core .NET 11 Preview 2 Add ASP.NET Core .NET 11 Preview 2 release notes include files Mar 10, 2026
@wadepickett wadepickett requested a review from tdykstra March 10, 2026 17:36
Removed product pr links.
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wadepickett commented Mar 10, 2026

(Cancelled!) remove all links to source code PR's. For example, remove this:
(dotnet/aspnetcore#64851)

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wadepickett commented Mar 10, 2026

Sorry, just entered a prompt on the wrong item! Cancelling the prompt.

Copilot stopped work on behalf of wadepickett due to an error March 10, 2026 17:51
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@copilot, all the new include files should be at this path:
https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/release-notes/aspnetcore-11/includes

All changes introduced in this PR are only to be on the AspNetCore.Doc repo.

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
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Copilot AI commented Mar 10, 2026

@copilot, all the new include files should be at this path:
https://github.com/dotnet/AspNetCore.Docs/tree/main/aspnetcore/release-notes/aspnetcore-11/includes

...

Confirmed — all four new include files (native-otel-tracing-p2.md, openapi-3-2-support-p2.md, infer-passkey-display-name-p2.md, performance-improvements-p2.md) are at aspnetcore/release-notes/aspnetcore-11/includes/, and all changes are within the AspNetCore.Docs repo only. I also restored the source code PR links in infer-passkey-display-name-p2.md that were removed in the previous commit, per the cancellation in commit 4e5b781.

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@copilot, the new include files in this PR should be on the aspnetcore.docs repo not aspnetcore repo.

So path names like this:
aspnetcore/release-notes/aspnetcore-11/includes/infer-passkey-display-name-p2.md
Should be changed to path names like this:
Create new include files in dotnet/AspNetCore.Docs at:
AspNetCore.Docs/aspnetcore/release-notes/aspnetcore-11/includes/

This PR should only make changes or create new articles or includes in the AspNetCore.Docs repo.

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Copilot AI commented Mar 10, 2026

@copilot, the new include files in this PR should be on the aspnetcore.docs repo not aspnetcore repo.

So path names like this:
...

All four new include files are already in the dotnet/AspNetCore.Docs repo at aspnetcore/release-notes/aspnetcore-11/includes/. The aspnetcore/ prefix is the subdirectory within the AspNetCore.Docs repo root — the full path is AspNetCore.Docs/aspnetcore/release-notes/aspnetcore-11/includes/. They sit alongside the existing Preview 1 includes (blazor.md, identity-time-provider.md, etc.) in the same directory. No changes were made to any other repository. You can verify at the PR files tab — all changed files are under aspnetcore/release-notes/.

Removed references to GitHub issues in the documentation for clarity.
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@copilot , Remove all PR links like these:
(dotnet/aspnetcore#64851)
(dotnet/aspnetcore#65256)

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
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Copilot AI commented Mar 10, 2026

@copilot , Remove all PR links like these:
(dotnet/aspnetcore#64851)
(dotnet/aspnetcore#65256)

Removed all 5 source code PR links from native-otel-tracing-p2.md, openapi-3-2-support-p2.md, and performance-improvements-p2.md in commit ec4e4de.

Date will be updated closer to when this is intended to go live.
@wadepickett wadepickett marked this pull request as ready for review March 10, 2026 18:22

ASP.NET Core Identity now automatically infers friendly display names for passkeys based on their AAGUID (Authenticator Attestation GUID). Built-in mappings are included for the most commonly used passkey authenticators, including Google Password Manager, iCloud Keychain, Windows Hello, 1Password, and Bitwarden.

For known authenticators, the name is automatically assigned without prompting the user. For unknown authenticators, the user is redirected to a rename page. Developers can extend the mappings by adding entries to the `PasskeyAuthenticators.cs` dictionary in their project.
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We need a link here to PasskeyAuthenticators.cs but that may have to happen in a different PR give time constraints, and I need to verify if it is specifically PasskeyAuthenticators.cs that includes a Preview 2 change so we know where to link.


To collect the built-in tracing data, subscribe to the `Microsoft.AspNetCore` activity source in your OpenTelemetry configuration:

```csharp
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I think this requires the OpenTelemetry.Exporter.Console NuGet package, but this isn't mentioned. We may have to come back to this in a later PR to include the NuGet package link given time considerations.

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@copilot, the new filemames need to be complete words. Change all file names that have -p2 to -preview2.
Example: change aspnetcore/release-notes/aspnetcore-11/includes/infer-passkey-display-name-p2.md to
aspnetcore/release-notes/aspnetcore-11/includes/infer-passkey-display-name-preview2.md

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
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Copilot AI commented Mar 10, 2026

@copilot, the new filemames need to be complete words. Change all file names that have -p2 to -preview2.
Example: change aspnetcore/release-notes/aspnetcore-11/includes/infer-pas...

Renamed all four include files from -p2 to -preview2 and updated all references in aspnetcore-11.md in commit 2d07de1.

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Looks good, a couple of nits

Removed comment out for breaking changes link since 11 is available.
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Approved. We have some items that have been noted to be addressed in a follow up PR such as two links that could be added for more info. Given time contraints they will be in a follow up PR rather than this one.

@wadepickett wadepickett requested a review from guardrex March 10, 2026 19:09
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@guardrex, this PR doesn't touch Blazor related items to avoid any overlap of effort. But you might want to look it over.

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I'll go ahead and merge to main since we are short on time. A new PR can make corrections from there.

@wadepickett wadepickett merged commit 442141b into main Mar 10, 2026
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@wadepickett wadepickett deleted the copilot/create-include-files-release-notes branch March 10, 2026 19:12
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This PR reflects the latest Release Notes build that was available at 10:30AM today at 3/10/26. Will check again for any updates on the Realease Notes that may warrent a PR update here again today.

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Just a few super NITs.

The Blazor updates are on #36832, and I'll merely merge them to main on Thursday morning.

.AddConsoleExporter());
```

No additional instrumentation library (such as `OpenTelemetry.Instrumentation.AspNetCore`) is needed. The framework now directly populates semantic convention attributes like `http.request.method`, `url.path`, `http.response.status_code`, and `server.address` on the request activity.
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Super NIT ...

Suggested change
No additional instrumentation library (such as `OpenTelemetry.Instrumentation.AspNetCore`) is needed. The framework now directly populates semantic convention attributes like `http.request.method`, `url.path`, `http.response.status_code`, and `server.address` on the request activity.
No additional instrumentation library (such as `OpenTelemetry.Instrumentation.AspNetCore`) is needed. The framework now directly populates semantic convention attributes on the request activity, such as `http.request.method`, `url.path`, `http.response.status_code`, and `server.address`.


ASP.NET Core Identity now automatically infers friendly display names for passkeys based on their AAGUID (Authenticator Attestation GUID). Built-in mappings are included for the most commonly used passkey authenticators, including Google Password Manager, iCloud Keychain, Windows Hello, 1Password, and Bitwarden.

For known authenticators, the name is automatically assigned without prompting the user. For unknown authenticators, the user is redirected to a rename page. Developers can extend the mappings by adding entries to the `PasskeyAuthenticators.cs` dictionary in their project.
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Super NIT ...

Suggested change
For known authenticators, the name is automatically assigned without prompting the user. For unknown authenticators, the user is redirected to a rename page. Developers can extend the mappings by adding entries to the `PasskeyAuthenticators.cs` dictionary in their project.
For known authenticators, the name is automatically assigned without prompting the user. For unknown authenticators, the user is redirected to a rename page. Extend the mappings by adding entries to the `PasskeyAuthenticators` dictionary in the project.

... and note that (without looking at the API), I took the file extension off of that API where referring to a dictionary that would take additional mappings.

@@ -0,0 +1,16 @@
### OpenAPI 3.2.0 support (Breaking Change)

`Microsoft.AspNetCore.OpenApi` now supports OpenAPI 3.2.0 through an updated dependency on `Microsoft.OpenApi` 3.3.1. This update includes breaking changes from the underlying library — see the [Microsoft.OpenApi upgrade guide](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-3.md) for details.
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Suggested change
`Microsoft.AspNetCore.OpenApi` now supports OpenAPI 3.2.0 through an updated dependency on `Microsoft.OpenApi` 3.3.1. This update includes breaking changes from the underlying librarysee the [Microsoft.OpenApi upgrade guide](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-3.md) for details.
`Microsoft.AspNetCore.OpenApi` now supports OpenAPI 3.2.0 through an updated dependency on `Microsoft.OpenApi` 3.3.1. This update includes breaking changes from the underlying library. For more information, see the [Microsoft.OpenApi upgrade guide](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-3.md).


`Microsoft.AspNetCore.OpenApi` now supports OpenAPI 3.2.0 through an updated dependency on `Microsoft.OpenApi` 3.3.1. This update includes breaking changes from the underlying library — see the [Microsoft.OpenApi upgrade guide](https://github.com/microsoft/OpenAPI.NET/blob/main/docs/upgrade-guide-3.md) for details.

To generate an OpenAPI 3.2.0 document, specify the version when calling `AddOpenApi()`:
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Suggested change
To generate an OpenAPI 3.2.0 document, specify the version when calling `AddOpenApi()`:
To generate an OpenAPI 3.2.0 document, specify the version when calling <xref:Microsoft.Extensions.DependencyInjection.OpenApiServiceCollectionExtensions.AddOpenApi%2A>:

});
```

Subsequent updates will take advantage of new capabilities in the 3.2.0 specification, such as item schema support for streaming events.
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Suggested change
Subsequent updates will take advantage of new capabilities in the 3.2.0 specification, such as item schema support for streaming events.
Subsequent updates take advantage of new capabilities in the 3.2.0 specification, such as item schema support for streaming events.

@@ -0,0 +1,5 @@
### Performance improvements

Kestrel's HTTP/1.1 request parser now uses a non-throwing code path for handling malformed requests. Instead of throwing `BadHttpRequestException` on every parse failure, the parser returns a result struct indicating success, incomplete, or error states. In scenarios with many malformed requests — such as port scanning, malicious traffic, or misconfigured clients — this eliminates expensive exception handling overhead and improves throughput by up to 20-40%. There's no impact on valid request processing.
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Suggested change
Kestrel's HTTP/1.1 request parser now uses a non-throwing code path for handling malformed requests. Instead of throwing `BadHttpRequestException` on every parse failure, the parser returns a result struct indicating success, incomplete, or error states. In scenarios with many malformed requests — such as port scanning, malicious traffic, or misconfigured clients — this eliminates expensive exception handling overhead and improves throughput by up to 20-40%. There's no impact on valid request processing.
Kestrel's HTTP/1.1 request parser now uses a non-throwing code path for handling malformed requests. Instead of throwing <xref:Microsoft.AspNetCore.Http.BadHttpRequestException> on every parse failure, the parser returns a result struct indicating success, incomplete, or error states. In scenarios with many malformed requests — such as port scanning, malicious traffic, or misconfigured clients — this eliminates expensive exception handling overhead and improves throughput by up to 20-40%. There's no impact on valid request processing.

## Breaking changes

Use the articles in [Breaking changes in .NET](/dotnet/core/compatibility/breaking-changes) to find breaking changes that might apply when upgrading an app to a newer version of .NET.
Use the articles in [Breaking changes in .NET]([/dotnet/core/compatibility/breaking-changes](https://learn.microsoft.com/dotnet/core/compatibility/breaking-changes)) to find breaking changes that might apply when upgrading an app to a newer version of .NET.
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Suggested change
Use the articles in [Breaking changes in .NET]([/dotnet/core/compatibility/breaking-changes](https://learn.microsoft.com/dotnet/core/compatibility/breaking-changes)) to find breaking changes that might apply when upgrading an app to a newer version of .NET.
Use the articles in [Breaking changes in .NET](/dotnet/core/compatibility/breaking-changes) to find breaking changes that might apply when upgrading an app to a newer version of .NET.

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guardrex commented Mar 10, 2026

Oh ... I see u merged before my review. No worries ... they're just NITs.

... well ... except for the last one ... it looks like a malformed link.

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Oh ... I see u merged before my review. No worries ... they're just NITs.

... well ... except for the last one ... it looks like a malformed link.

I got you covered. Thanks for the review, I must have been merging at the same time and didn't see the refresh. I created a new issue and I am fixing per your suggestions in a new now. I ran out of time, sorry I missed it in this one.

New tracking issue:
#36858

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What's New Automation

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