Enable NonIsolatedNonSending by default

Package.swift

@@ -18,7 +18,19 @@ import PackageDescription
 let swiftSettings: [SwiftSetting] = [
     // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
     // Require `any` for existential types.
-    .enableUpcomingFeature("ExistentialAny")
+    .enableUpcomingFeature("ExistentialAny"),
+
+    // https://github.com/swiftlang/swift-evolution/blob/main/proposals/0444-member-import-visibility.md
+    .enableUpcomingFeature("MemberImportVisibility"),
+
+    // https://github.com/swiftlang/swift-evolution/blob/main/proposals/0409-access-level-on-imports.md
+    .enableUpcomingFeature("InternalImportsByDefault"),
+
+    // https://docs.swift.org/compiler/documentation/diagnostics/nonisolated-nonsending-by-default/
+    .enableUpcomingFeature("NonisolatedNonsendingByDefault"),
+
+    // Ensure all public types are explicitly annotated as Sendable or not Sendable.
+    .unsafeFlags(["-Xfrontend", "-require-explicit-sendable"]),
 ]
 
 let package = Package(

Package@swift-6.0.swift

@@ -0,0 +1,66 @@
+// swift-tools-version: 5.9
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftOpenAPIGenerator open source project
+//
+// Copyright (c) 2023 Apple Inc. and the SwiftOpenAPIGenerator project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftOpenAPIGenerator project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+import PackageDescription
+
+// General Swift-settings for all targets.
+let swiftSettings: [SwiftSetting] = [
+    // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
+    // Require `any` for existential types.
+    .enableUpcomingFeature("ExistentialAny")
+]
+
+let package = Package(
+    name: "swift-openapi-runtime",
+    platforms: [
+        .macOS(.v10_15), .macCatalyst(.v13), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
+    ],
+    products: [
+        .library(
+            name: "OpenAPIRuntime",
+            targets: ["OpenAPIRuntime"]
+        )
+    ],
+    dependencies: [
+        .package(url: "https://github.com/apple/swift-http-types", from: "1.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "OpenAPIRuntime",
+            dependencies: [
+                .product(name: "HTTPTypes", package: "swift-http-types")
+            ],
+            swiftSettings: swiftSettings
+        ),
+        .testTarget(
+            name: "OpenAPIRuntimeTests",
+            dependencies: ["OpenAPIRuntime"],
+            swiftSettings: swiftSettings
+        ),
+    ]
+)
+
+// ---    STANDARD CROSS-REPO SETTINGS DO NOT EDIT   --- //
+for target in package.targets {
+    switch target.type {
+    case .regular, .test, .executable:
+        var settings = target.swiftSettings ?? []
+        // https://github.com/swiftlang/swift-evolution/blob/main/proposals/0444-member-import-visibility.md
+        settings.append(.enableUpcomingFeature("MemberImportVisibility"))
+        target.swiftSettings = settings
+    case .macro, .plugin, .system, .binary: ()  // not applicable
+    @unknown default: ()  // we don't know what to do here, do nothing
+    }
+}
+// --- END: STANDARD CROSS-REPO SETTINGS DO NOT EDIT --- //

Package@swift-6.1.swift

@@ -0,0 +1,66 @@
+// swift-tools-version: 5.9
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftOpenAPIGenerator open source project
+//
+// Copyright (c) 2023 Apple Inc. and the SwiftOpenAPIGenerator project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftOpenAPIGenerator project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+import PackageDescription
+
+// General Swift-settings for all targets.
+let swiftSettings: [SwiftSetting] = [
+    // https://github.com/apple/swift-evolution/blob/main/proposals/0335-existential-any.md
+    // Require `any` for existential types.
+    .enableUpcomingFeature("ExistentialAny")
+]
+
+let package = Package(
+    name: "swift-openapi-runtime",
+    platforms: [
+        .macOS(.v10_15), .macCatalyst(.v13), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
+    ],
+    products: [
+        .library(
+            name: "OpenAPIRuntime",
+            targets: ["OpenAPIRuntime"]
+        )
+    ],
+    dependencies: [
+        .package(url: "https://github.com/apple/swift-http-types", from: "1.0.0"),
+    ],
+    targets: [
+        .target(
+            name: "OpenAPIRuntime",
+            dependencies: [
+                .product(name: "HTTPTypes", package: "swift-http-types")
+            ],
+            swiftSettings: swiftSettings
+        ),
+        .testTarget(
+            name: "OpenAPIRuntimeTests",
+            dependencies: ["OpenAPIRuntime"],
+            swiftSettings: swiftSettings
+        ),
+    ]
+)
+
+// ---    STANDARD CROSS-REPO SETTINGS DO NOT EDIT   --- //
+for target in package.targets {
+    switch target.type {
+    case .regular, .test, .executable:
+        var settings = target.swiftSettings ?? []
+        // https://github.com/swiftlang/swift-evolution/blob/main/proposals/0444-member-import-visibility.md
+        settings.append(.enableUpcomingFeature("MemberImportVisibility"))
+        target.swiftSettings = settings
+    case .macro, .plugin, .system, .binary: ()  // not applicable
+    @unknown default: ()  // we don't know what to do here, do nothing
+    }
+}
+// --- END: STANDARD CROSS-REPO SETTINGS DO NOT EDIT --- //

Sources/OpenAPIRuntime/Base/UndocumentedPayload.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
+public import HTTPTypes
 
 /// A payload value used by undocumented operation responses.
 ///

Sources/OpenAPIRuntime/Conversion/Configuration.swift

@@ -11,7 +11,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import Foundation
+public import Foundation
 
 /// A type that allows customization of Date encoding and decoding.
 ///

Sources/OpenAPIRuntime/Conversion/Converter+Client.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 import Foundation
-import HTTPTypes
+public import HTTPTypes
 
 extension Converter {
 

Sources/OpenAPIRuntime/Conversion/Converter+Common.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 import Foundation
-import HTTPTypes
+public import HTTPTypes
 
 extension Converter {
 

Sources/OpenAPIRuntime/Conversion/Converter+Server.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 import Foundation
-import HTTPTypes
+public import HTTPTypes
 
 extension Converter {
 

Sources/OpenAPIRuntime/Conversion/ServerVariable.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import Foundation
+public import Foundation
 
 extension URL {
     /// Returns a validated server URL created from the URL template, or

Sources/OpenAPIRuntime/Conversion/URLExtensions.swift

@@ -11,7 +11,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import Foundation
+public import Foundation
 
 extension URL {
     /// Returns the default server URL of "/".

Sources/OpenAPIRuntime/Deprecated/Deprecated.swift

@@ -11,7 +11,7 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-import Foundation
+public import Foundation
 import HTTPTypes
 
 // MARK: - Functionality to be removed in the future

Sources/OpenAPIRuntime/Errors/ClientError.swift

@@ -12,13 +12,13 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
+public import HTTPTypes
 #if canImport(Darwin)
-import struct Foundation.URL
+public import struct Foundation.URL
 #else
-@preconcurrency import struct Foundation.URL
+@preconcurrency public import struct Foundation.URL
 #endif
-import protocol Foundation.LocalizedError
+public import protocol Foundation.LocalizedError
 
 /// An error thrown by a client performing an OpenAPI operation.
 ///

Sources/OpenAPIRuntime/Errors/ServerError.swift

@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
-import protocol Foundation.LocalizedError
+public import HTTPTypes
+public import protocol Foundation.LocalizedError
 
 /// An error thrown by a server handling an OpenAPI operation.
 public struct ServerError: Error, HTTPResponseConvertible {

Sources/OpenAPIRuntime/EventStreams/JSONLinesDecoding.swift

@@ -13,11 +13,11 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONDecoder
+public import class Foundation.JSONDecoder
 #else
-@preconcurrency import class Foundation.JSONDecoder
+@preconcurrency public import class Foundation.JSONDecoder
 #endif
-import struct Foundation.Data
+public import struct Foundation.Data
 
 /// A sequence that parses arbitrary byte chunks into lines using the JSON Lines format.
 public struct JSONLinesDeserializationSequence<Upstream: AsyncSequence & Sendable>: Sendable

Sources/OpenAPIRuntime/EventStreams/JSONLinesEncoding.swift

@@ -13,9 +13,9 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONEncoder
+public import class Foundation.JSONEncoder
 #else
-@preconcurrency import class Foundation.JSONEncoder
+@preconcurrency public import class Foundation.JSONEncoder
 #endif
 
 /// A sequence that serializes lines by concatenating them using the JSON Lines format.

Sources/OpenAPIRuntime/EventStreams/JSONSequenceDecoding.swift

@@ -13,12 +13,12 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONDecoder
+public import class Foundation.JSONDecoder
 #else
-@preconcurrency import class Foundation.JSONDecoder
+@preconcurrency public import class Foundation.JSONDecoder
 #endif
-import protocol Foundation.LocalizedError
-import struct Foundation.Data
+public import protocol Foundation.LocalizedError
+public import struct Foundation.Data
 
 /// A sequence that parses arbitrary byte chunks into lines using the JSON Sequence format.
 public struct JSONSequenceDeserializationSequence<Upstream: AsyncSequence & Sendable>: Sendable

Sources/OpenAPIRuntime/EventStreams/JSONSequenceEncoding.swift

@@ -13,9 +13,9 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONEncoder
+public import class Foundation.JSONEncoder
 #else
-@preconcurrency import class Foundation.JSONEncoder
+@preconcurrency public import class Foundation.JSONEncoder
 #endif
 
 /// A sequence that serializes lines by concatenating them using the JSON Sequence format.

Sources/OpenAPIRuntime/EventStreams/ServerSentEventsDecoding.swift

@@ -13,11 +13,11 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONDecoder
+public import class Foundation.JSONDecoder
 #else
-@preconcurrency import class Foundation.JSONDecoder
+@preconcurrency public import class Foundation.JSONDecoder
 #endif
-import struct Foundation.Data
+public import struct Foundation.Data
 
 /// A sequence that parses arbitrary byte chunks into events using the Server-sent Events format.
 ///

Sources/OpenAPIRuntime/EventStreams/ServerSentEventsEncoding.swift

@@ -13,9 +13,9 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(Darwin)
-import class Foundation.JSONEncoder
+public import class Foundation.JSONEncoder
 #else
-@preconcurrency import class Foundation.JSONEncoder
+@preconcurrency public import class Foundation.JSONEncoder
 #endif
 
 /// A sequence that serializes Server-sent Events.

Sources/OpenAPIRuntime/Interface/ClientTransport.swift

@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
-import struct Foundation.URL
+public import HTTPTypes
+public import struct Foundation.URL
 
 /// A type that performs HTTP operations.
 ///

Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
+public import HTTPTypes
 import Foundation
 
 /// A container for request metadata already parsed and validated

Sources/OpenAPIRuntime/Interface/ErrorHandlingMiddleware.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
+public import HTTPTypes
 
 /// An opt-in error handling middleware that converts an error to an HTTP response.
 ///

Sources/OpenAPIRuntime/Interface/HTTPBody.swift

@@ -12,9 +12,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-import class Foundation.NSLock
-import protocol Foundation.LocalizedError
-import struct Foundation.Data  // only for convenience initializers
+public import class Foundation.NSLock
+public import protocol Foundation.LocalizedError
+public import struct Foundation.Data  // only for convenience initializers
 
 /// A body of an HTTP request or HTTP response.
 ///

Sources/OpenAPIRuntime/Interface/ServerTransport.swift

@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-import HTTPTypes
+public import HTTPTypes
 
 /// A type that registers and handles HTTP operations.
 ///