[1] Setting the Swift tools version | Documentation, , https://docs.swift.org/swiftpm/documentation/packagemanagerdocs/settingswifttoolsversion/
[2] Swift 6言語モードを有効化する | Documentation, , https://swift-migration-guide.jp/documentation/swift-6-concurrency-migration-guide-----/swift6mode/#%E3%83%91%E3%83%83%E3%82%B1%E3%83%BC%E3%82%B8%E3%83%9E%E3%83%8B%E3%83%95%E3%82%A7%E3%82%B9%E3%83%88
[3] 関連: コメントの中身が意味を持ってしまう