diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 72aaa6e1..bbf3333d 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -71,7 +71,7 @@ cd platforms/swift && ./Scripts/lint fix
 Open a pull request with the following changes:
 
 1. Bump the package version in `platforms/swift/Sources/ShopifyCheckoutKit/ShopifyCheckoutKit.swift`.
-2. Bump the podspec version in `platforms/swift/ShopifyCheckoutKit.podspec`.
+2. Bump the podspec version in `ShopifyCheckoutKit.podspec` (at the repo root).
 3. Add an entry to the top of `platforms/swift/CHANGELOG.md`.
 
 Once merged, draft a release on GitHub:
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 6c0d6122..6653d625 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -22,7 +22,7 @@
 <details>
 <summary>Releasing a new Swift version?</summary>
 
-- [ ] I have bumped the version in `platforms/swift/ShopifyCheckoutKit.podspec`
+- [ ] I have bumped the version in `ShopifyCheckoutKit.podspec`
 - [ ] I have bumped the version in `platforms/swift/Sources/ShopifyCheckoutKit/ShopifyCheckoutKit.swift`
 - [ ] I have updated `platforms/swift/CHANGELOG.md`
 - [ ] I have updated the SwiftPM/CocoaPods version snippets in `platforms/swift/README.md` (major version only)
diff --git a/.github/workflows/swift-lint.yml b/.github/workflows/swift-lint.yml
index 5e97449a..4007eb8f 100644
--- a/.github/workflows/swift-lint.yml
+++ b/.github/workflows/swift-lint.yml
@@ -63,12 +63,14 @@ jobs:
     runs-on: ${{ vars.MACOS_RUNNER }}
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/platforms/swift/Gemfile
-    defaults:
-      run:
-        working-directory: platforms/swift
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ruby/setup-ruby@c4e5b1316158f92e3d49443a9d58b31d25ac0f8f # v1.306.0
         with:
           bundler-cache: true
-      - run: bundle exec pod lib lint --allow-warnings
+          working-directory: platforms/swift
+      # The podspec lives at the repo root so it can glob source files in
+      # both platforms/swift/ and protocol/languages/swift/. Lint runs from
+      # the repo root; the Gemfile under platforms/swift/ is still used via
+      # BUNDLE_GEMFILE above.
+      - run: bundle exec pod lib lint ShopifyCheckoutKit.podspec --allow-warnings
diff --git a/.github/workflows/swift-publish.yml b/.github/workflows/swift-publish.yml
index c1dacbc1..c3ae2b26 100644
--- a/.github/workflows/swift-publish.yml
+++ b/.github/workflows/swift-publish.yml
@@ -14,9 +14,6 @@ jobs:
     runs-on: ${{ vars.MACOS_RUNNER }}
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/platforms/swift/Gemfile
-    defaults:
-      run:
-        working-directory: platforms/swift
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -27,9 +24,10 @@ jobs:
           working-directory: platforms/swift
 
       - name: Deploy to Cocoapods
+        # Podspec lives at the repo root; lint and trunk push run from there.
         run: |
           set -eo pipefail
-          bundle exec pod lib lint --allow-warnings --verbose
-          bundle exec pod trunk push --allow-warnings --verbose
+          bundle exec pod lib lint ShopifyCheckoutKit.podspec --allow-warnings --verbose
+          bundle exec pod trunk push ShopifyCheckoutKit.podspec --allow-warnings --verbose
         env:
           COCOAPODS_TRUNK_TOKEN: ${{ secrets.COCOAPODS_TRUNK_TOKEN }}
diff --git a/.swiftlint.yml b/.swiftlint.yml
index 96a0b2b2..01492d9c 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -15,7 +15,7 @@ included:
 excluded:
   - platforms/swift/Samples
   - platforms/swift/Sources/ShopifyCheckoutKit/Models.swift
-  - platforms/swift/Sources/ShopifyCheckoutProtocol/Generated
+  - protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Generated
 
 opt_in_rules:
   - array_init
diff --git a/Package.swift b/Package.swift
index 12ed9643..53a6abf6 100644
--- a/Package.swift
+++ b/Package.swift
@@ -33,7 +33,7 @@ let package = Package(
         // Targets can depend on other targets in this package, and on products in packages this package depends on.
         .target(
             name: "ShopifyCheckoutProtocol",
-            path: "platforms/swift/Sources/ShopifyCheckoutProtocol"
+            path: "protocol/languages/swift/Sources/ShopifyCheckoutProtocol"
         ),
         .target(
             name: "ShopifyCheckoutKit",
@@ -50,7 +50,7 @@ let package = Package(
         .testTarget(
             name: "ShopifyCheckoutProtocolTests",
             dependencies: ["ShopifyCheckoutProtocol"],
-            path: "platforms/swift/Tests/ShopifyCheckoutProtocolTests",
+            path: "protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests",
             resources: [.copy("Fixtures")]
         ),
         .testTarget(
diff --git a/platforms/swift/ShopifyCheckoutKit.podspec b/ShopifyCheckoutKit.podspec
similarity index 62%
rename from platforms/swift/ShopifyCheckoutKit.podspec
rename to ShopifyCheckoutKit.podspec
index eb679dac..d14aca9f 100644
--- a/platforms/swift/ShopifyCheckoutKit.podspec
+++ b/ShopifyCheckoutKit.podspec
@@ -8,7 +8,7 @@ Pod::Spec.new do |s|
   s.homepage  = "https://github.com/Shopify/checkout-kit"
   s.readme    = "https://github.com/Shopify/checkout-kit/blob/main/README.md"
   s.changelog = "https://github.com/Shopify/checkout-kit/releases"
-  s.license   = { :type => "MIT", :file => "../../LICENSE" }
+  s.license   = { :type => "MIT", :file => "LICENSE" }
 
   s.source = {
     :git => "https://github.com/Shopify/checkout-kit.git", :tag => s.version.to_s
@@ -26,19 +26,22 @@ Pod::Spec.new do |s|
 
   s.subspec 'Core' do |core|
     core.source_files = [
-      'Sources/ShopifyCheckoutKit/**/*.swift',
-      'Sources/ShopifyCheckoutProtocol/**/*.swift',
+      'platforms/swift/Sources/ShopifyCheckoutKit/**/*.swift',
+      'protocol/languages/swift/Sources/ShopifyCheckoutProtocol/**/*.swift',
     ]
     core.resource_bundles = {
-      'ShopifyCheckoutKit' => ['Sources/ShopifyCheckoutKit/Assets.xcassets']
+      'ShopifyCheckoutKit' => ['platforms/swift/Sources/ShopifyCheckoutKit/Assets.xcassets']
     }
   end
 
   s.subspec 'AcceleratedCheckouts' do |accelerated|
-    accelerated.source_files = 'Sources/ShopifyAcceleratedCheckouts/**/*.swift'
+    accelerated.source_files = 'platforms/swift/Sources/ShopifyAcceleratedCheckouts/**/*.swift'
     accelerated.dependency 'ShopifyCheckoutKit/Core'
     accelerated.resource_bundles = {
-      'ShopifyAcceleratedCheckouts' => ['Sources/ShopifyAcceleratedCheckouts/Localizable.xcstrings', 'Sources/ShopifyAcceleratedCheckouts/Media.xcassets']
+      'ShopifyAcceleratedCheckouts' => [
+        'platforms/swift/Sources/ShopifyAcceleratedCheckouts/Localizable.xcstrings',
+        'platforms/swift/Sources/ShopifyAcceleratedCheckouts/Media.xcassets',
+      ]
     }
   end
 end
diff --git a/platforms/swift/Scripts/lint b/platforms/swift/Scripts/lint
index 20443533..b8ef5f63 100755
--- a/platforms/swift/Scripts/lint
+++ b/platforms/swift/Scripts/lint
@@ -165,12 +165,16 @@ fi
 if [[ "$MODE" == "check" && "$SKIP_POD" == "false" ]]; then
 	echo "🔍 Running CocoaPods lint..."
 
+	# Podspec lives at the repo root so it can glob source files in both
+	# platforms/swift/ and protocol/languages/swift/. Run lint from the
+	# repo root.
+	REPO_ROOT="$(git -C "$(dirname "$0")" rev-parse --show-toplevel)"
 	POD_LOG=""
 	if [[ "$VERBOSE" == "true" ]]; then
-		bundle exec pod lib lint --allow-warnings
+		(cd "$REPO_ROOT" && bundle exec pod lib lint ShopifyCheckoutKit.podspec --allow-warnings)
 	else
 		POD_LOG="$(mktemp "${TMPDIR:-/tmp}/checkout-kit-pod-lint.XXXXXX")"
-		bundle exec pod lib lint --allow-warnings >"$POD_LOG" 2>&1
+		(cd "$REPO_ROOT" && bundle exec pod lib lint ShopifyCheckoutKit.podspec --allow-warnings) >"$POD_LOG" 2>&1
 	fi
 	POD_STATUS=$?
 
@@ -184,7 +188,7 @@ if [[ "$MODE" == "check" && "$SKIP_POD" == "false" ]]; then
 
 		echo "❌ CocoaPods lint exit status: $POD_STATUS"
 		echo "❌ CocoaPods detected issues that need to be fixed."
-		echo "🔧 Run 'bundle exec pod lib lint --allow-warnings --verbose' for details"
+		echo "🔧 Run 'bundle exec pod lib lint ShopifyCheckoutKit.podspec --allow-warnings --verbose' from the repo root for details"
 		exit 1
 	fi
 
diff --git a/protocol/languages/swift/.gitignore b/protocol/languages/swift/.gitignore
new file mode 100644
index 00000000..3552f2b4
--- /dev/null
+++ b/protocol/languages/swift/.gitignore
@@ -0,0 +1 @@
+.swiftpm
diff --git a/protocol/languages/swift/Package.swift b/protocol/languages/swift/Package.swift
new file mode 100644
index 00000000..8c953f0b
--- /dev/null
+++ b/protocol/languages/swift/Package.swift
@@ -0,0 +1,31 @@
+// swift-tools-version: 5.9
+
+import PackageDescription
+
+let package = Package(
+    name: "ShopifyCheckoutProtocol",
+    platforms: [
+        .iOS(.v13),
+        .macOS(.v10_15),
+    ],
+    products: [
+        .library(
+            name: "ShopifyCheckoutProtocol",
+            targets: ["ShopifyCheckoutProtocol"]
+        ),
+    ],
+    targets: [
+        .target(
+            name: "ShopifyCheckoutProtocol",
+            path: "Sources/ShopifyCheckoutProtocol"
+        ),
+        .testTarget(
+            name: "ShopifyCheckoutProtocolTests",
+            dependencies: ["ShopifyCheckoutProtocol"],
+            path: "Tests/ShopifyCheckoutProtocolTests",
+            resources: [
+                .copy("Fixtures"),
+            ]
+        ),
+    ]
+)
diff --git a/protocol/languages/swift/README.md b/protocol/languages/swift/README.md
new file mode 100644
index 00000000..8eb936c8
--- /dev/null
+++ b/protocol/languages/swift/README.md
@@ -0,0 +1,86 @@
+# ShopifyCheckoutProtocol — Swift SDK
+
+Swift library for the Universal Commerce Protocol (UCP) embedded checkout specification.
+
+## Requirements
+
+- Swift 6.0+
+
+## Installation
+
+### Swift Package Manager (Package.swift)
+
+Add the dependency to your `Package.swift`:
+
+```swift
+dependencies: [
+    .package(url: "<REPO_URL>", from: "1.0.0")
+]
+```
+
+Then add `ShopifyCheckoutProtocol` to your target's dependencies:
+
+```swift
+.target(
+    name: "YourTarget",
+    dependencies: ["ShopifyCheckoutProtocol"]
+)
+```
+
+### Xcode
+
+1. Open your project in Xcode
+2. Go to **File > Add Package Dependencies...**
+3. Enter the repository URL: `<REPO_URL>`
+4. Click **Add Package**
+
+## Usage
+
+```swift
+import ShopifyCheckoutProtocol
+```
+
+### Bridging with checkout-sheet-kit-swift
+
+If you use [`checkout-sheet-kit-swift`](https://github.com/Shopify/checkout-sheet-kit-swift), add a retroactive conformance to bridge `CheckoutProtocol.Client` with the kit's `CheckoutCommunicationProtocol`:
+
+```swift
+extension CheckoutProtocol.Client: @retroactive CheckoutCommunicationProtocol {}
+```
+
+### Creating a Client
+
+`CheckoutProtocol.Client` uses a fluent API to register event handlers:
+
+```swift
+private let client = CheckoutProtocol.Client()
+    .on(CheckoutProtocol.start) { checkout in
+        print("Checkout started: \(checkout.id)")
+    }
+    .on(CheckoutProtocol.complete) { checkout in
+        print("Checkout completed: \(checkout.order?.id ?? "unknown")")
+    }
+```
+
+### Connecting to Accelerated Checkout Buttons
+
+Pass the client to `AcceleratedCheckoutButtons` using the `.connect()` modifier. Note that some event handlers like `.onFail` and `.onCancel` remain on the button view itself:
+
+```swift
+AcceleratedCheckoutButtons(cartID: cartID)
+    .onFail { error in
+        print("SDK error: \(error)")
+    }
+    .onCancel {
+        print("Sheet cancelled")
+    }
+    .connect(client)
+```
+
+### Presenting with ShopifyCheckoutSheetKit
+
+Pass the client when presenting a checkout sheet:
+
+```swift
+ShopifyCheckoutSheetKit.present(checkout: checkoutURL, delegate: client)
+```
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol+URL.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol+URL.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol+URL.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol+URL.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/CheckoutProtocol.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/Client.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Client.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/Client.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Client.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/Codec.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Codec.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/Codec.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Codec.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/Descriptors.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Descriptors.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/Descriptors.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Descriptors.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/JSONRPCMessage.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/JSONRPCMessage.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/JSONRPCMessage.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/JSONRPCMessage.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/MutableCopyable.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/MutableCopyable.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/MutableCopyable.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/MutableCopyable.swift
diff --git a/platforms/swift/Sources/ShopifyCheckoutProtocol/UCPMessage.swift b/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/UCPMessage.swift
similarity index 100%
rename from platforms/swift/Sources/ShopifyCheckoutProtocol/UCPMessage.swift
rename to protocol/languages/swift/Sources/ShopifyCheckoutProtocol/UCPMessage.swift
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/ClientTests.swift b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/ClientTests.swift
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/ClientTests.swift
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/ClientTests.swift
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/CodecDecodeTests.swift b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/CodecDecodeTests.swift
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/CodecDecodeTests.swift
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/CodecDecodeTests.swift
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/CodecEncodeTests.swift b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/CodecEncodeTests.swift
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/CodecEncodeTests.swift
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/CodecEncodeTests.swift
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/DescriptorTests.swift b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/DescriptorTests.swift
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/DescriptorTests.swift
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/DescriptorTests.swift
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/.gitkeep b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/.gitkeep
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/.gitkeep
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/.gitkeep
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/notification.json b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/notification.json
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/notification.json
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/notification.json
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/ready_response.json b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/ready_response.json
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/ready_response.json
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/ready_response.json
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/request.json b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/request.json
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/request.json
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/Fixtures/request.json
diff --git a/platforms/swift/Tests/ShopifyCheckoutProtocolTests/ModelDecodingTests.swift b/protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/ModelDecodingTests.swift
similarity index 100%
rename from platforms/swift/Tests/ShopifyCheckoutProtocolTests/ModelDecodingTests.swift
rename to protocol/languages/swift/Tests/ShopifyCheckoutProtocolTests/ModelDecodingTests.swift
diff --git a/protocol/scripts/generate_models.sh b/protocol/scripts/generate_models.sh
index 4815b01a..3dd6d539 100755
--- a/protocol/scripts/generate_models.sh
+++ b/protocol/scripts/generate_models.sh
@@ -210,7 +210,7 @@ case "$LANG" in
     ;;
 
   swift)
-    OUTPUT="${REPO_ROOT}/platforms/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift"
+    OUTPUT="${REPO_ROOT}/protocol/languages/swift/Sources/ShopifyCheckoutProtocol/Generated/Models.swift"
     quicktype \
       --lang swift \
       --swift-5-support \