これかな。 https://github.com/apple/swift-evolution/blob/main/proposals/0304-structured-concurrency.md#actor-context-propagation

swift-evolution/0304-structured-concurrency.md at main · apple/swif...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swift-evolution/0304-structured-concurrency.md at main · apple/swift-evolution