diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..f511307c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [develop, main]
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  format:
+    name: SwiftFormat lint
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install SwiftFormat
+        run: brew install swiftformat
+
+      - name: Run SwiftFormat (lint mode)
+        run: swiftformat --lint .
diff --git a/DesignSystem/Asset+Alias.swift b/DesignSystem/Asset+Alias.swift
index b2a22f26..f53b782c 100644
--- a/DesignSystem/Asset+Alias.swift
+++ b/DesignSystem/Asset+Alias.swift
@@ -2,14 +2,14 @@ import SwiftUI
 
 public typealias Asset = DesignSystemAsset
 
-public extension Image {
-    init(_ asset: DesignSystemImages) {
+extension Image {
+    public init(_ asset: DesignSystemImages) {
         self.init(asset: asset)
     }
 }
 
-public extension Color {
-    init(_ asset: DesignSystemColors) {
+extension Color {
+    public init(_ asset: DesignSystemColors) {
         self.init(asset: asset)
     }
 }
diff --git a/FeaturesTests/FeaturesTests.swift b/FeaturesTests/FeaturesTests.swift
new file mode 100644
index 00000000..a3eb2115
--- /dev/null
+++ b/FeaturesTests/FeaturesTests.swift
@@ -0,0 +1,8 @@
+import XCTest
+@testable import Features
+
+final class FeaturesTests: XCTestCase {
+    func testPlaceholder() {
+        XCTAssertTrue(true)
+    }
+}
diff --git a/MyI/Tests/MyITests.swift b/MyI/Tests/MyITests.swift
new file mode 100644
index 00000000..70eb43ba
--- /dev/null
+++ b/MyI/Tests/MyITests.swift
@@ -0,0 +1,8 @@
+import XCTest
+@testable import MyI
+
+final class MyITests: XCTestCase {
+    func testPlaceholder() {
+        XCTAssertTrue(true)
+    }
+}
diff --git a/Project.swift b/Project.swift
index 30982578..509d12b6 100644
--- a/Project.swift
+++ b/Project.swift
@@ -126,6 +126,28 @@ let project = Project(
                     "TARGETED_DEVICE_FAMILY": "1"
                 ]
             )
+        ),
+        .target(
+            name: "FeaturesTests",
+            destinations: .iOS,
+            product: .unitTests,
+            bundleId: "kr.co.codegrove.FeaturesTests",
+            deploymentTargets: .iOS("17.0"),
+            sources: ["FeaturesTests/**/*.swift"],
+            dependencies: [
+                .target(name: "Features")
+            ]
+        ),
+        .target(
+            name: "MyITests",
+            destinations: .iOS,
+            product: .unitTests,
+            bundleId: "kr.co.codegrove.MyITests",
+            deploymentTargets: .iOS("17.0"),
+            sources: ["MyI/Tests/**/*.swift"],
+            dependencies: [
+                .target(name: "MyI")
+            ]
         )
     ]
 )
diff --git a/ci_scripts/ci_post_clone.sh b/ci_scripts/ci_post_clone.sh
new file mode 100755
index 00000000..cf25676d
--- /dev/null
+++ b/ci_scripts/ci_post_clone.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+set -eu
+
+# Xcode Cloud post-clone hook
+# Tuist 프로젝트라 xcodebuild 호출 전에 xcodeproj/xcworkspace 생성이 필요.
+# - GoogleService-Info.plist 복원 (Environment Variable에서)
+# - Tuist 설치
+# - SPM 의존성 fetch
+# - xcodeproj/xcworkspace 생성
+
+# Repo root로 이동 (ci_scripts/에서 한 단계 위)
+cd "$(dirname "$0")/.."
+
+# GoogleService-Info.plist 복원 (.gitignore라 repo에 없음)
+# Xcode Cloud Environment Variable `GOOGLE_SERVICE_INFO_PLIST_BASE64`에서 디코딩.
+# 로컬 빌드는 이미 plist 있으니 변수 없으면 skip.
+if [ -n "${GOOGLE_SERVICE_INFO_PLIST_BASE64:-}" ]; then
+  echo "$GOOGLE_SERVICE_INFO_PLIST_BASE64" | base64 --decode > MyI/Resources/GoogleService-Info.plist
+fi
+
+brew install tuist
+tuist install
+tuist generate --no-open