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[codex] Drop Swift 6.1/6.2 support and raise MSSV to 6.3 - #762
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kateinoigakukun
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June 10, 2026 23:43
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#749 is currently blocked just by older Swift compatibilities, but it doesn't have much value in maintaining support for them, so just drop them.
6.2.x was a very unfortunate release channel and we couldn't land swiftlang/swift#83950, so 6.2.x's concurrency global executor integration is completely broken. It's a good time to bump the min-supported Swift version to 6.3.