Reference Foundry project from hosted agent target

[tommasodotNET]

Description

Publish-mode hosted agents now attach the Microsoft Foundry project reference to the actual deployment target resource after the target is resolved, instead of attaching it to the hosted-agent wrapper resource. This ensures the generated or existing container target has the Foundry project connection environment annotations before container build/deployment processing consumes the target resource.

This keeps run-mode behavior unchanged and preserves the hosted-agent wrapper's reference relationship to the deployment target. A regression test verifies the Foundry project reference is on AzureHostedAgentResource.Target and not only on the hosted-agent resource.

Validation:

./restore.sh
dotnet test --project tests/Aspire.Hosting.Foundry.Tests/Aspire.Hosting.Foundry.Tests.csproj --no-launch-profile -- --filter-not-trait "quarantined=true" --filter-not-trait "outerloop=true"

Fixes # (issue)

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 -- 17687

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 17687"

[Copilot]

Pull request overview

This PR moves Foundry project references in publish-mode hosted agents onto the resolved deployment target so container deployment processing can consume the target’s Foundry connection annotations.

Changes:

• Adds publish-mode helper to attach the Foundry project reference to the deployment target.
• Keeps the hosted-agent wrapper relationship to its target while removing the direct project reference from the wrapper.
• Adds a regression test for target-level project reference placement.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/Aspire.Hosting.Foundry/HostedAgent/HostedAgentBuilderExtension.cs	Moves Foundry project reference attachment from the hosted-agent wrapper to the resolved deployment target.
tests/Aspire.Hosting.Foundry.Tests/HostedAgentExtensionTests.cs	Adds coverage for project reference placement on the hosted-agent deployment target.

[davidfowl]

/backport to release/13.4

[github-actions]

Started backporting to release/13.4 (link to workflow run)

[davidfowl]

/backport to release/13.4

[davidfowl]

/backport to release/13.4

[github-actions]

Started backporting to release/13.4 (link to workflow run)

[github-actions]

Started backporting to release/13.4 (link to workflow run)

[aspire-repo-bot]

@davidfowl an error occurred while backporting to release/13.4. See the workflow output for details.

[davidfowl]

/backport to release/13.4

[github-actions]

Started backporting to release/13.4 (link to workflow run)

[github-actions]

Re-running the failed jobs in the CI workflow for this pull request because 1 job was identified as retry-safe transient failures in the CI run attempt.
GitHub was asked to rerun all failed jobs for that attempt, and the rerun is being tracked in the rerun attempt.
The job links below point to the failed attempt jobs that matched the retry-safe transient failure rules.

• Tests / Templates-XUnit_V2_NewUpAndBuildSupportProjectTemplatesTests / Templates-XUnit_V2_NewUpAndBuildSupportProjectTemplatesTests (windows-latest) - Failed step 'Set up .NET Core' matched the transient annotation allowlist.