From 6c9be1a6a425e277d330e349e013abfddcfe5732 Mon Sep 17 00:00:00 2001
From: Paul Bates <paul@happycodelucky.com>
Date: Sat, 9 May 2026 08:23:11 -0700
Subject: [PATCH] v2.1.0: Swift 6 strict concurrency
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Bumps the package to swift-tools-version 6.0 and enables Swift 6
language mode (strict concurrency checking) on all targets via
swiftLanguageMode(.v6) in swiftSettings.

The library compiles clean under both default Swift 6 mode and the
maximally-strict `-strict-concurrency=complete -warnings-as-errors`
flag combination — no source changes required. The v2.0 rewrite was
already concurrency-correct by design:

* All public value types declared Sendable explicitly
* Mutable state lives behind actors (MulticastListener, TaskBox)
* Cross-actor communication uses `Task { ... }` indirection
* No mutable globals — os.Logger instances are Sendable, SSDPLog is
  an enum-namespace
* Network.framework types (NWConnectionGroup, NWConnection, NWParameters)
  are Sendable in iOS 17+ SDKs (our floor)
* `@Sendable` annotations on the closures handed to onTermination

Turning on enforcement validates the design.

Verification
------------
* swift build -Xswiftc -strict-concurrency=complete -Xswiftc -warnings-as-errors
  — clean
* swift test — 32/32 pass
* Live LAN: ssdp-demo search ssdp:all --timeout 3 — 93 results
  including Sonos ZPS45, no regressions
* swift build --package-path Examples/ssdp-demo — clean

Requirements
------------
Now requires Swift 6.0+ / Xcode 16+. Library platforms unchanged
(iOS 17, macOS 14, tvOS 17). README's "Requirements" section updated.
The Swift badge bumped from 5.9 to 6.

Version constant bumped to 2.1.0 (minor — strict concurrency is a
build-time check, not a public API change; existing call sites still
compile unchanged).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 Package.swift                     | 10 ++++++++--
 README.md                         |  8 +++++---
 Sources/SwiftSSDP/SwiftSSDP.swift |  2 +-
 3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/Package.swift b/Package.swift
index f48d6db..ac29088 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.9
+// swift-tools-version:6.0
 //
 //  Package.swift
 //  SwiftSSDP
@@ -24,7 +24,10 @@ let package = Package(
     targets: [
         .target(
             name: "SwiftSSDP",
-            path: "Sources/SwiftSSDP"
+            path: "Sources/SwiftSSDP",
+            swiftSettings: [
+                .swiftLanguageMode(.v6),
+            ]
         ),
         .testTarget(
             name: "SwiftSSDPTests",
@@ -32,6 +35,9 @@ let package = Package(
             path: "Tests/SwiftSSDPTests",
             resources: [
                 .copy("Fixtures"),
+            ],
+            swiftSettings: [
+                .swiftLanguageMode(.v6),
             ]
         ),
     ]
diff --git a/README.md b/README.md
index 55a9254..4cd17e8 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # SwiftSSDP
 
-![Swift 5.9](https://img.shields.io/badge/swift-5.9-orange.svg?style=for-the-badge&logo=swift)
+![Swift 6](https://img.shields.io/badge/swift-6-orange.svg?style=for-the-badge&logo=swift)
 ![Platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20macOS%20%7C%20tvOS-blue.svg?style=for-the-badge&logo=apple)
 [![CI](https://img.shields.io/github/actions/workflow/status/happycodelucky/SwiftSSDP/ci.yml?style=for-the-badge&label=ci)](https://github.com/happycodelucky/SwiftSSDP/actions/workflows/ci.yml)
 [![Release](https://img.shields.io/github/v/release/happycodelucky/SwiftSSDP?style=for-the-badge)](https://github.com/happycodelucky/SwiftSSDP/releases/latest)
@@ -213,10 +213,12 @@ Categories: `discovery`, `transport`, `listener`, `parser`.
 
 ## Requirements
 
-- **Swift:** 5.9+
-- **Xcode:** 15+
+- **Swift:** 6.0+ (Swift 6 language mode with strict concurrency checking)
+- **Xcode:** 16+
 - **Platforms:** iOS 17, macOS 14, tvOS 17 (watchOS not supported — multicast is unavailable on watchOS)
 
+The library compiles cleanly under `-strict-concurrency=complete -warnings-as-errors`. Public API surface is fully `Sendable` so it composes naturally with actor-isolated callers.
+
 ## License
 
 MIT — see [LICENSE](LICENSE).
diff --git a/Sources/SwiftSSDP/SwiftSSDP.swift b/Sources/SwiftSSDP/SwiftSSDP.swift
index e0710af..94b666b 100644
--- a/Sources/SwiftSSDP/SwiftSSDP.swift
+++ b/Sources/SwiftSSDP/SwiftSSDP.swift
@@ -17,5 +17,5 @@ public enum SwiftSSDP {
     ///
     /// > Note: This constant is rewritten by `.github/workflows/release.yml` whenever a
     /// > release is published. Do not edit it by hand outside of that workflow.
-    public static let version = "2.0.0"
+    public static let version = "2.1.0"
 }