SkillActivation Framework Fails to Build in Xcode 26 When Using foundation-models-utilities

Hi Apple Team,

I'm trying to use the SkillActivation framework from the Foundation Models Utilities repository:

https://github.com/apple/foundation-models-utilities

Environment:

• Xcode 26 Beta
• iPadOS/macOS 26 Beta
• Apple Intelligence enabled
• Foundation Models Utilities: latest version from GitHub

Issue: As soon as I import or use SkillActivation-related APIs, Xcode reports build errors and the project fails to compile.

The rest of the Foundation Models framework works correctly, but the problem appears specifically when SkillActivation is added.

Steps to Reproduce:

1. Create a new project.
2. Add foundation-models-utilities via Swift Package Manager.
3. Import SkillActivation / follow the sample implementation.
4. Build the project.

Expected Result: The project should compile successfully and SkillActivation should be available.

Actual Result: Xcode reports compilation errors and the build fails.

Questions:

• Is there any additional entitlement, capability, or configuration required for SkillActivation?
• Is SkillActivation currently supported in Xcode 26 Beta?
• Are there any known issues with the current version of foundation-models-utilities?

Thank you.