Remove retired GitHub Models integration

[Eric Erhardt (eerhardt)]

Description

GitHub Models was fully retired on July 30, 2026, so the Aspire.Hosting.GitHub.Models integration no longer works. Aspire 13.5 shipped the final obsolete package; this change now removes the integration from the repository.

The source project, API baselines, tests, polyglot fixtures, and end-to-end playground are removed along with their solution entries. The current connection-properties specification no longer lists GitHubModel.

The package remains in the CLI deprecated-package blocklist so previously published versions stay hidden from aspire add. Historical release notes are also preserved.

Breaking changes

Aspire.Hosting.GitHub.Models and its public APIs are no longer built or shipped from this repository. Existing users must migrate to another model provider, such as Microsoft Foundry.

Validation:

• .\build.cmd /p:SkipNativeBuild=true
• dotnet test --project tests\Infrastructure.Tests\Infrastructure.Tests.csproj --no-launch-profile -- --filter-class "*.SelectTestsAcceptanceTests" --filter-not-trait "quarantined=true" --filter-not-trait "outerloop=true"

Fixes #18953

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 19848

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 19848"

[Copilot]

🟡 Changes recommended

Active component documentation still presents the retired GitHub Models service as supported.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Removes the retired GitHub Models hosting integration while preserving its CLI blocklist entry and historical release notes.

Changes:

• Deletes the integration, API baselines, tests, polyglot fixtures, and playground.
• Removes associated solution entries and connection-property documentation.
• Leaves several active component docs/comments still advertising GitHub Models support.

File summaries

File	Description
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/tsconfig.json	Removes TypeScript fixture configuration.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/package.json	Removes TypeScript fixture package definition.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/package-lock.json	Removes TypeScript dependency lock.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/aspire.config.json	Removes TypeScript AppHost configuration.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/apphost.mts	Removes TypeScript API fixture.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Python/pylock.apphost.toml	Removes Python lock file.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Python/aspire.config.json	Removes Python AppHost configuration.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Python/apphost.py	Removes Python API fixture.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Python/apphost_requirements.txt	Removes Python requirements.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Java/aspire.config.json	Removes Java AppHost configuration.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Java/AppHost.java	Removes Java API fixture.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Go/go.mod	Removes Go module definition.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Go/aspire.config.json	Removes Go AppHost configuration.
tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/Go/apphost.go	Removes Go API fixture.
tests/Aspire.Hosting.GitHub.Models.Tests/GitHubModelsFunctionalTests.cs	Removes functional coverage.
tests/Aspire.Hosting.GitHub.Models.Tests/GitHubModelsExtensionTests.cs	Removes extension-method coverage.
tests/Aspire.Hosting.GitHub.Models.Tests/ConnectionPropertiesTests.cs	Removes connection-property coverage.
tests/Aspire.Hosting.GitHub.Models.Tests/Aspire.Hosting.GitHub.Models.Tests.csproj	Removes the test project.
src/Aspire.Hosting.GitHub.Models/README.md	Removes integration documentation.
src/Aspire.Hosting.GitHub.Models/GitHubModelsHealthCheck.cs	Removes the health check.
src/Aspire.Hosting.GitHub.Models/GitHubModelsExtensions.cs	Removes hosting APIs.
src/Aspire.Hosting.GitHub.Models/GitHubModelsDeprecation.cs	Removes deprecation metadata.
src/Aspire.Hosting.GitHub.Models/GitHubModelResource.cs	Removes the resource model.
src/Aspire.Hosting.GitHub.Models/GitHubModel.Obsolete.cs	Removes obsolete catalog entries.
src/Aspire.Hosting.GitHub.Models/GitHubModel.Generated.cs	Removes generated model catalog.
src/Aspire.Hosting.GitHub.Models/GithubModel.cs	Removes the model descriptor.
src/Aspire.Hosting.GitHub.Models/build/Aspire.Hosting.GitHub.Models.props	Removes package build imports.
src/Aspire.Hosting.GitHub.Models/Aspire.Hosting.GitHub.Models.csproj	Removes the product project.
src/Aspire.Hosting.GitHub.Models/api/Aspire.Hosting.GitHub.Models.cs	Removes the .NET API baseline.
src/Aspire.Hosting.GitHub.Models/api/Aspire.Hosting.GitHub.Models.ats.txt	Removes the ATS baseline.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/wwwroot/app.css	Removes playground styling.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Properties/launchSettings.json	Removes web launch settings.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Program.cs	Removes web application startup.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/GitHubModelsEndToEnd.WebStory.csproj	Removes the web project.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/Routes.razor	Removes playground routing.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/Pages/Home.razor	Removes the model demo page.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/Pages/Error.razor	Removes the error page.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/Layout/MainLayout.razor.css	Removes layout styling.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/Layout/MainLayout.razor	Removes the main layout.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/App.razor	Removes the Blazor application shell.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/Components/_Imports.razor	Removes Razor imports.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/appsettings.json	Removes web settings.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.WebStory/appsettings.Development.json	Removes development settings.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/webstory.module.bicep	Removes generated deployment infrastructure.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/webstory-containerapp.module.bicep	Removes Container Apps infrastructure.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/Properties/launchSettings.json	Removes AppHost launch settings.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/GitHubModelsEndToEnd.AppHost.csproj	Removes the AppHost project.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/env.module.bicep	Removes environment infrastructure.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/env-acr.module.bicep	Removes registry infrastructure.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/aspire-manifest.json	Removes the deployment manifest.
playground/GitHubModelsEndToEnd/GitHubModelsEndToEnd.AppHost/AppHost.cs	Removes the playground resource model.
playground/GitHubModelsEndToEnd/aspire.config.json	Removes playground configuration.
playground/GitHubModelsEndToEnd/.vscode/launch.json	Removes playground debugger configuration.
playground/AspireWithMaui/AspireWithMaui.slnx	Removes integration, test, and playground entries.
docs/specs/connection-properties.md	Removes GitHub Model property references.
Aspire.slnx	Removes integration, test, and playground projects.

Review details

Files not reviewed (1)

• tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/package-lock.json: Generated file

• Files reviewed: 55/56 changed files
• Comments generated: 1
• Review effort level: Balanced

[github-actions]

Retrying the failed CI jobs for this pull request from the CI run attempt. The rerun is being tracked in the rerun attempt.

[github-actions]

Tests selector

Selects the full PR test matrix + all PR-gated jobs (ALL) — a rule matching 'Aspire.slnx' selects ALL

Advisory workflow impact (4)

• Aspire.Deployment.EndToEnd.Tests (deployment workflow-only)
• Aspire.EndToEnd.Tests (outerloop-only)
• Aspire.Oracle.EntityFrameworkCore.Tests (outerloop-only)
• deployment-e2e (schedule/dispatch-only)

---

Selection computed for commit e818020.

[Copilot]

🟢 Approval recommended

The retired integration and its dependent artifacts are consistently removed while the deprecated package blocklist remains intact.

Review details

Files not reviewed (1)

• tests/PolyglotAppHosts/Aspire.Hosting.GitHub.Models/TypeScript/package-lock.json: Generated file

• Files reviewed: 58/59 changed files
• Comments generated: 0 new
• Review effort level: Balanced

[github-actions]

Retrying the failed CI jobs for this pull request from the CI run attempt. The rerun is being tracked in the rerun attempt.