[codex] Drop Swift 6.1/6.2 support and raise MSSV to 6.3

.github/workflows/test.yml

@@ -12,18 +12,13 @@ jobs:
  strategy:
  matrix:
  entry:
- - os: ubuntu-22.04
- toolchain:
- download-url: https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-RELEASE/swift-6.1-RELEASE-ubuntu22.04.tar.gz
- wasi-backend: Node
- target: "wasm32-unknown-wasi"
- env: |
- JAVASCRIPTKIT_DISABLE_TRACING_TRAIT=1
  - os: ubuntu-24.04
  toolchain:
  download-url: https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT-SNAPSHOT-2025-12-01-a/swift-DEVELOPMENT-SNAPSHOT-2025-12-01-a-ubuntu24.04.tar.gz
  wasi-backend: Node
  target: "wasm32-unknown-wasip1"
+ env: |
+ JAVASCRIPTKIT_DISABLE_TRACING_TRAIT=1
  - os: ubuntu-24.04
  toolchain:
  download-url: https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DEVELOPMENT-SNAPSHOT-2026-03-05-a/swift-6.3-DEVELOPMENT-SNAPSHOT-2026-03-05-a-ubuntu24.04.tar.gz
@@ -77,10 +72,6 @@ jobs:
  strategy:
  matrix:
  entry:
- - image: "swift:6.1.2"
- swift-syntax-version: "601.0.0"
- - image: "swift:6.2"
- swift-syntax-version: "602.0.0"
  - image: "swift:6.3"
  swift-syntax-version: "603.0.0"
  runs-on: ubuntu-latest
@@ -110,7 +101,7 @@ jobs:
  matrix:
  include:
  - os: macos-15
- xcode: Xcode_16.4
+ xcode: Xcode_26.0.1
  runs-on: ${{ matrix.os }}
  steps:
  - uses: actions/checkout@v6
@@ -134,7 +125,7 @@ jobs:
  format:
  runs-on: ubuntu-latest
  container:
- image: swift:6.1.2
+ image: swift:6.3
  steps:
  - uses: actions/checkout@v6
  - run: ./Utilities/format.swift

Examples/Embedded/README.md

@@ -1,6 +1,6 @@
 # Embedded example
 
-Requires a recent DEVELOPMENT-SNAPSHOT toolchain. (tested with swift-6.1-DEVELOPMENT-SNAPSHOT-2025-02-21-a)
+Requires a recent DEVELOPMENT-SNAPSHOT toolchain.
 
 ```sh
 $ ./build.sh

Plugins/PackageToJS/Tests/ExampleTests.swift

@@ -297,7 +297,6 @@ extension Trait where Self == ConditionTrait {
  }
  }
 
- #if compiler(>=6.1)
  @Test(.requireSwiftSDK)
  func testingWithCoverage() throws {
  let swiftSDKID = try #require(Self.getSwiftSDKID())
@@ -325,7 +324,6 @@ extension Trait where Self == ConditionTrait {
  }
  }
  }
- #endif
  #endif // compiler(>=6.3)
 
  @Test(.requireSwiftSDK(triple: "wasm32-unknown-wasip1-threads"))
@@ -379,7 +377,6 @@ extension Trait where Self == ConditionTrait {
  }
  }
 
- #if compiler(>=6.1)
  // TODO: Remove triple restriction once swift-testing is shipped in p1-threads SDK
  @Test(.requireSwiftSDK(triple: "wasm32-unknown-wasi"))
  func continuationLeakInTest_SwiftTesting() throws {
@@ -391,8 +388,6 @@ extension Trait where Self == ConditionTrait {
  try runSwift(["package", "--disable-sandbox", "--swift-sdk", swiftSDKID, "js", "test"], [:])
  }
  }
- #endif
-
  @Test(.requireSwiftSDK)
  func playwrightOnPageLoad_XCTest() throws {
  let swiftSDKID = try #require(Self.getSwiftSDKID())
@@ -413,7 +408,6 @@ extension Trait where Self == ConditionTrait {
  }
  }
 
- #if compiler(>=6.1)
  // TODO: Remove triple restriction once swift-testing is shipped in p1-threads SDK
  @Test(.requireSwiftSDK(triple: "wasm32-unknown-wasi"))
  func playwrightOnPageLoad_SwiftTesting() throws {
@@ -434,5 +428,4 @@ extension Trait where Self == ConditionTrait {
  )
  }
  }
- #endif
 }

README.md

@@ -120,6 +120,10 @@ Use the [BridgeJS Playground](https://swiftwasm.org/JavaScriptKit/PlayBridgeJS/)
 
 Check out the [examples](https://github.com/swiftwasm/JavaScriptKit/tree/main/Examples) for more detailed usage patterns.
 
+## Minimum Supported Swift Version (MSSV)
+
+The minimum supported Swift version is 6.3.
+
 ## Contributing
 
 Contributions are welcome! See [CONTRIBUTING.md](CONTRIBUTING.md) for details on how to contribute to the project.

Sources/JavaScriptEventLoop/JSRemote.swift

@@ -62,7 +62,7 @@ extension JSRemote where T == JSObject {
  ///
  /// - Parameter object: The JavaScript object to reference remotely.
  public init(_ object: JSObject) {
- #if compiler(>=6.1) && _runtime(_multithreaded)
+ #if _runtime(_multithreaded)
  self.init(sourceObject: object, sourceTid: object.ownerTid)
  #else
  self.init(sourceObject: object, sourceTid: -1)
@@ -92,7 +92,7 @@ extension JSRemote where T == JSObject {
  public func withJSObject<R: Sendable, E: Error>(
  _ body: @Sendable @escaping (JSObject) throws(E) -> R
  ) async throws(E) -> sending R {
- #if compiler(>=6.1) && _runtime(_multithreaded)
+ #if _runtime(_multithreaded)
  if storage.sourceTid == swjs_get_worker_thread_id_cached() {
  return try body(storage.sourceObject)
  }
@@ -137,13 +137,11 @@ private final class _JSRemoteContext: @unchecked Sendable {
  }
 }
 
-#if compiler(>=6.1)
 @_expose(wasm, "swjs_invoke_remote_jsobject_body")
 @_cdecl("swjs_invoke_remote_jsobject_body")
-#endif
 @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
 func _swjs_invoke_remote_jsobject_body(_ contextPtr: UnsafeRawPointer?) -> Bool {
- #if compiler(>=6.1) && _runtime(_multithreaded)
+ #if _runtime(_multithreaded)
  guard let contextPtr else { return true }
  let context = Unmanaged<_JSRemoteContext>.fromOpaque(contextPtr).takeRetainedValue()