# Design Priorities for the Swift 6 Language Mode

**URL:** <https://forums.swift.org/t/design-priorities-for-the-swift-6-language-mode/62408>\
**Category:** Announcements\
**Created:** [January 5, 2023, 4:51pm UTC](https://forums.swift.org/t/design-priorities-for-the-swift-6-language-mode/62408 "2023-01-05T16:51:46Z")\
**Posts on this page:** 1\
**Showing post:** 80

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**Author:** ![Jeehut](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/jeehut/32/21743_2.png) [@Jeehut](https://forums.swift.org/u/Jeehut)\
**Post date:** [April 17, 2023, 11:55pm UTC](https://forums.swift.org/t/design-priorities-for-the-swift-6-language-mode/62408/80 "2023-04-17T23:55:48Z")

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> [@esummers](#):
>
> For now you could look them up in [swift/Features.def at main · apple/swift · GitHub](https://github.com/apple/swift/blob/main/include/swift/Basic/Features.def)

I checked the file, but something seems off: I can only find [these lines](https://github.com/apple/swift/blob/main/include/swift/Basic/Features.def#L105-L109) in there, but there's no mention of `StrictConcurrency` which was explicitly mentioned in [SE-0362](https://github.com/apple/swift-evolution/blob/main/proposals/0362-piecemeal-future-features.md#proposals-define-their-own-feature-identifier) to be available as an "upcoming feature". The same goes for `ImplicitOpenExistentials`. Am I missing something?

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