Drop Swift 6.0 (proto)

.changes/drop-swift-6.0

@@ -0,0 +1 @@
+minor type="changed" "Bumped minimum Swift toolchain to 6.1 (Xcode 16.3+)"

.github/workflows/ci.yaml

@@ -26,20 +26,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          # https://github.com/actions/runner-images/blob/main/images/macos/macos-14-arm64-Readme.md
-          - os: macos-14
-            xcode: 16.2
-            platform: "iOS Simulator,name=iPhone 16 Pro,OS=18.2"
-          - os: macos-14
-            xcode: 16.2
-            platform: "macOS"
-          - os: macos-14
-            xcode: 16.2
-            platform: "macOS,variant=Mac Catalyst"
-          - os: macos-14
-            xcode: 16.2
-            platform: "tvOS Simulator,name=Apple TV,OS=18.2"
-
           # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
           - os: macos-15
             xcode: 16.4
@@ -56,38 +42,38 @@ jobs:
 
           # https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md
           - os: macos-26
-            xcode: 26.4
-            platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.4.1"
+            xcode: 26.5
+            platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.5"
             symbol-graph: true
           - os: macos-26
-            xcode: 26.4
-            platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.4.1"
+            xcode: 26.5
+            platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.5"
             extension-api-only: true
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
             platform: "macOS"
             symbol-graph: true
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
             platform: "macOS"
             asan: true
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
             platform: "macOS"
             tsan: true
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
             platform: "macOS"
             strict-concurrency-env: true
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
             platform: "macOS,variant=Mac Catalyst"
           - os: macos-26
-            xcode: 26.4
-            platform: "visionOS Simulator,name=Apple Vision Pro,OS=26.4.1"
+            xcode: 26.5
+            platform: "visionOS Simulator,name=Apple Vision Pro,OS=26.5"
           - os: macos-26
-            xcode: 26.4
-            platform: "tvOS Simulator,name=Apple TV,OS=26.4"
+            xcode: 26.5
+            platform: "tvOS Simulator,name=Apple TV,OS=26.5"
 
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60

.github/workflows/cocoapods-lint.yaml

@@ -19,7 +19,7 @@ jobs:
           - os: macos-15
             xcode: 16.4
           - os: macos-26
-            xcode: 26.4
+            xcode: 26.5
     runs-on: ${{ matrix.os }}
     timeout-minutes: 30
     steps:

.github/workflows/publish-docs.yaml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.4.1"
+          - platform: "iOS Simulator,name=iPhone 17 Pro,OS=26.5"
             artifact_name: symbol-graph-ios
           - platform: "macOS"
             artifact_name: symbol-graph-macos

.swiftformat

@@ -1,4 +1,4 @@
---swiftversion 6.0
+--swiftversion 6.1
 --exclude Sources/LiveKit/Protos
 --header "/*\n * Copyright {year} LiveKit\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *     http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */"
 --ifdef no-indent

AGENTS.md

@@ -96,8 +96,8 @@ Threading:
 
 ### Language Version
 
-- Minimum supported Xcode is Xcode 16 (Swift 6.0); see Apple's [App Store submission requirements](https://developer.apple.com/news/upcoming-requirements/?id=02212025a)
-- `Package.swift` (`swift-tools-version:6.0`) declares the **oldest** supported version
+- Minimum supported Xcode is Xcode 16.3 (Swift 6.1); see Apple's [App Store submission requirements](https://developer.apple.com/news/upcoming-requirements/?id=02212025a)
+- `Package.swift` (`swift-tools-version:6.1`) declares the **oldest** supported version
 - Keep `Package.swift`, `LiveKitClient.podspec`, and `.swiftformat`'s `--swiftversion` in sync when changing the minimum
 - New code should use the latest stable Swift version
 - Some constructs require `#if swift` or `#if compiler` directives to support newer-than-minimum toolchains:

Benchmarks/LiveKitBenchmark/BenchmarkSupport/BenchmarkConfig.swift

@@ -61,7 +61,7 @@ struct BenchmarkConfig {
             url: url,
             apiKey: apiKey,
             apiSecret: apiSecret,
-            mode: mode
+            mode: mode,
         )
     }
 }

Benchmarks/LiveKitBenchmark/BenchmarkSupport/EchoParticipant.swift

@@ -97,13 +97,13 @@ private final class DataEchoDelegate: NSObject, RoomDelegate, @unchecked Sendabl
         Task {
             try? await room.localParticipant.publish(
                 data: data,
-                options: .init(topic: topic)
+                options: .init(topic: topic),
             )
             let sentTime = Int64(ProcessInfo.processInfo.systemUptime * 1_000_000)
             timestamps.mutate {
                 $0.append(EchoParticipant.ProcessingTimestamp(
                     receiveUs: recvTime,
-                    echoSentUs: sentTime
+                    echoSentUs: sentTime,
                 ))
             }
         }

Benchmarks/LiveKitBenchmark/BenchmarkSupport/TokenGenerator.swift

@@ -38,7 +38,7 @@ struct TokenGenerator {
         identity: String,
         canPublish: Bool = true,
         canSubscribe: Bool = true,
-        ttl: TimeInterval = 300
+        ttl: TimeInterval = 300,
     ) -> String {
         let grants = VideoGrants(
             roomCreate: false,
@@ -55,19 +55,19 @@ struct TokenGenerator {
             canUpdateOwnMetadata: false,
             ingressAdmin: false,
             hidden: false,
-            recorder: false
+            recorder: false,
         )
 
         let options = TokenOptions(
             ttl: ttl,
             videoGrants: grants,
             identity: identity,
-            name: identity
+            name: identity,
         )
 
         let credentials = ApiCredentials(
             key: apiKey,
-            secret: apiSecret
+            secret: apiSecret,
         )
 
         do {

Benchmarks/LiveKitBenchmark/Benchmarks.swift

@@ -40,7 +40,7 @@ let benchmarks: @Sendable () -> Void = {
         warmupIterations: 5,
         scalingFactor: .one,
         maxDuration: .seconds(300),
-        maxIterations: 100
+        maxIterations: 100,
     )
 
     // Register all benchmark suites

Benchmarks/LiveKitBenchmark/ConnectionBenchmark.swift

@@ -48,8 +48,8 @@ let connectionBenchmarks: @Sendable () -> Void = {
             warmupIterations: 5,
             scalingFactor: .one,
             maxDuration: .seconds(300),
-            maxIterations: 25
-        )
+            maxIterations: 25,
+        ),
     ) { benchmark in
         let config = BenchmarkConfig.fromEnvironment()
         let tokenGen = TokenGenerator(apiKey: config.apiKey, apiSecret: config.apiSecret)
@@ -101,8 +101,8 @@ let connectionBenchmarks: @Sendable () -> Void = {
             warmupIterations: 5,
             scalingFactor: .one,
             maxDuration: .seconds(300),
-            maxIterations: 25
-        )
+            maxIterations: 25,
+        ),
     ) { benchmark in
         let config = BenchmarkConfig.fromEnvironment()
         let tokenGen = TokenGenerator(apiKey: config.apiKey, apiSecret: config.apiSecret)

Benchmarks/LiveKitBenchmark/DataChannelBenchmark.swift

@@ -48,7 +48,7 @@ let dataChannelBenchmarks: @Sendable () -> Void = {
 private func registerDataChannelBenchmark(
     name: String,
     payloadSize: Int,
-    reliable: Bool
+    reliable: Bool,
 ) {
     nonisolated(unsafe) var senderRoom: Room?
     nonisolated(unsafe) var echo: EchoParticipant?
@@ -67,7 +67,7 @@ private func registerDataChannelBenchmark(
                 benchmark.startMeasurement()
                 try await senderRoom.localParticipant.publish(
                     data: payload,
-                    options: .init(topic: "benchmark", reliable: reliable)
+                    options: .init(topic: "benchmark", reliable: reliable),
                 )
                 try await echoReceiver.waitForData(timeout: 5.0)
                 benchmark.stopMeasurement()
@@ -104,7 +104,7 @@ private func registerDataChannelBenchmark(
             senderRoom = nil
             echo = nil
             echoReceiver = nil
-        }
+        },
     )
 }
 

Benchmarks/LiveKitBenchmark/RPCBenchmark.swift

@@ -56,7 +56,7 @@ let rpcBenchmarks: @Sendable () -> Void = {
 private func registerRpcBenchmark(
     name: String,
     payloadSize: Int,
-    delay: UInt64
+    delay: UInt64,
 ) {
     nonisolated(unsafe) var senderRoom: Room?
     nonisolated(unsafe) var echo: EchoParticipant?
@@ -75,7 +75,7 @@ private func registerRpcBenchmark(
                 let response = try await senderRoom.localParticipant.performRpc(
                     destinationIdentity: Participant.Identity(from: "bench-echo"),
                     method: "echo",
-                    payload: payload
+                    payload: payload,
                 )
                 benchmark.stopMeasurement()
 
@@ -108,6 +108,6 @@ private func registerRpcBenchmark(
             if let e = echo { await e.disconnect() }
             senderRoom = nil
             echo = nil
-        }
+        },
     )
 }

Benchmarks/Package.swift

@@ -23,7 +23,7 @@ let package = Package(
             path: "LiveKitBenchmark",
             plugins: [
                 .plugin(name: "BenchmarkPlugin", package: "package-benchmark"),
-            ]
+            ],
         ),
-    ]
+    ],
 )

Package.swift

@@ -1,5 +1,5 @@
-// swift-tools-version:6.0
-// (Xcode16.0+)
+// swift-tools-version:6.1
+// (Xcode16.3+)
 
 import PackageDescription
 
@@ -14,7 +14,7 @@ let package = Package(
     products: [
         .library(
             name: "LiveKit",
-            targets: ["LiveKit"]
+            targets: ["LiveKit"],
         ),
     ],
     dependencies: [
@@ -28,7 +28,7 @@ let package = Package(
     targets: [
         .target(
             name: "LKObjCHelpers",
-            publicHeadersPath: "include"
+            publicHeadersPath: "include",
         ),
         .target(
             name: "LiveKit",
@@ -43,36 +43,36 @@ let package = Package(
             ],
             resources: [
                 .process("PrivacyInfo.xcprivacy"),
-            ]
+            ],
         ),
         .target(
             name: "LiveKitTestSupport",
             dependencies: [
                 "LiveKit",
             ],
-            path: "Tests/LiveKitTestSupport"
+            path: "Tests/LiveKitTestSupport",
         ),
         .testTarget(
             name: "LiveKitCoreTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
         .testTarget(
             name: "LiveKitAudioTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
         .testTarget(
             name: "LiveKitObjCTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
     ],
-    swiftLanguageModes: [.v5, .v6]
+    swiftLanguageModes: [.v5, .v6],
 )

Package@swift-6.2.swift

@@ -15,7 +15,7 @@ let package = Package(
     products: [
         .library(
             name: "LiveKit",
-            targets: ["LiveKit"]
+            targets: ["LiveKit"],
         ),
     ],
     dependencies: [
@@ -29,7 +29,7 @@ let package = Package(
     targets: [
         .target(
             name: "LKObjCHelpers",
-            publicHeadersPath: "include"
+            publicHeadersPath: "include",
         ),
         .target(
             name: "LiveKit",
@@ -44,36 +44,36 @@ let package = Package(
             ],
             resources: [
                 .process("PrivacyInfo.xcprivacy"),
-            ]
+            ],
         ),
         .target(
             name: "LiveKitTestSupport",
             dependencies: [
                 "LiveKit",
             ],
-            path: "Tests/LiveKitTestSupport"
+            path: "Tests/LiveKitTestSupport",
         ),
         .testTarget(
             name: "LiveKitCoreTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
         .testTarget(
             name: "LiveKitAudioTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
         .testTarget(
             name: "LiveKitObjCTests",
             dependencies: [
                 "LiveKit",
                 "LiveKitTestSupport",
-            ]
+            ],
         ),
     ],
-    swiftLanguageModes: [.v5, .v6]
+    swiftLanguageModes: [.v5, .v6],
 )

README.md

@@ -169,7 +169,7 @@ Make sure any access to your app's UI elements are from the main thread, for exa
 
 ### Swift 6
 
-LiveKit is currently compiled using Swift 6.0 with full support for strict concurrency. Apps compiled in Swift 6 language mode will not need to use `@preconcurrency` or `@unchecked Sendable` to access LiveKit classes.
+LiveKit is currently compiled using Swift 6.1 with full support for strict concurrency. Apps compiled in Swift 6 language mode will not need to use `@preconcurrency` or `@unchecked Sendable` to access LiveKit classes.
 
 ### Memory management