diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000..112af537
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,34 @@
+module.exports = {
+	extends: 'erb',
+	plugins: ['@typescript-eslint'],
+	rules: {
+		'@typescript-eslint/no-explicit-any': 'off',
+		'react/react-in-jsx-scope': 'off',
+		'react-hooks/exhaustive-deps': 'warn',
+		'import/prefer-default-export': 'off',
+		'no-shadow': 'off',
+		'@typescript-eslint/no-shadow': 'error',
+		'no-unused-vars': 'off',
+		'@typescript-eslint/no-unused-vars': 'warn',
+		'import/extensions': 'off',
+		'import/no-extraneous-dependencies': 'off',
+	},
+	parserOptions: {
+		ecmaVersion: 2022,
+		sourceType: 'module',
+	},
+	settings: {
+		'import/resolver': {
+			node: {},
+			webpack: {
+				config: require.resolve(
+					'./scripts/configs/webpack.config.eslint.ts',
+				),
+			},
+			typescript: {},
+		},
+		'import/parsers': {
+			'@typescript-eslint/parser': ['.ts', '.tsx'],
+		},
+	},
+};
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..93419a73
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: npm
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+      - name: Run linter
+        run: npm run lint
+
+  typecheck:
+    name: Type Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: npm
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+      - name: Run TypeScript type check
+        run: npx tsc --noEmit
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: npm
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+      - name: Run tests
+        run: npm test
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: |
+            coverage/
+          if-no-files-found: ignore
diff --git a/package.json b/package.json
index 5bb0d725..0f867469 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,8 @@
 		"start:main": "cross-env NODE_ENV=development electronmon -r ts-node/register/transpile-only .",
 		"start:preload": "cross-env NODE_ENV=development TS_NODE_TRANSPILE_ONLY=true webpack --config ./scripts/configs/webpack.config.preload.dev.ts",
 		"start:renderer": "cross-env NODE_ENV=development TS_NODE_TRANSPILE_ONLY=true webpack serve --config ./scripts/configs/webpack.config.renderer.dev.ts",
-		"format": "prettier '**/*.{js,jsx,ts,tsx}' --write"
+		"format": "prettier '**/*.{js,jsx,ts,tsx}' --write",
+		"test": "jest"
 	},
 	"config": {
 		"forge": "./forge.config.js"
@@ -210,8 +211,14 @@
 		}
 	},
 	"devEngines": {
-		"node": ">=18.x",
-		"npm": ">=7.x"
+		"runtime": {
+			"name": "node",
+			"version": ">=18.x"
+		},
+		"packageManager": {
+			"name": "npm",
+			"version": ">=7.x"
+		}
 	},
 	"electronmon": {
 		"patterns": [
@@ -219,5 +226,41 @@
 			"src/main/**"
 		],
 		"logLevel": "verbose"
+	},
+	"jest": {
+		"testEnvironment": "jsdom",
+		"testMatch": [
+			"**/__tests__/**/*.test.[jt]s?(x)",
+			"**/?(*.)+(spec|test).[jt]s?(x)"
+		],
+		"transform": {
+			"\\.(ts|tsx|js|jsx)$": [
+				"ts-jest",
+				{
+					"tsconfig": {
+						"jsx": "react-jsx",
+						"module": "commonjs"
+					},
+					"diagnostics": false
+				}
+			]
+		},
+		"moduleNameMapper": {
+			"\\.(jpg|jpeg|png|gif|svg|ico|eot|ttf|woff|woff2)$": "<rootDir>/src/__tests__/__mocks__/fileMock.js",
+			"tailwindcss/tailwind\\.css": "identity-obj-proxy",
+			"\\.(css|less|sass|scss)$": "identity-obj-proxy",
+			"^/lib/(.*)$": "<rootDir>/src/lib/$1"
+		},
+		"setupFilesAfterEnv": [
+			"<rootDir>/src/__tests__/setupTests.ts"
+		],
+		"moduleDirectories": [
+			"node_modules",
+			"src"
+		],
+		"testPathIgnorePatterns": [
+			"/node_modules/",
+			"/release/"
+		]
 	}
 }
diff --git a/src/__tests__/__mocks__/fileMock.js b/src/__tests__/__mocks__/fileMock.js
new file mode 100644
index 00000000..86059f36
--- /dev/null
+++ b/src/__tests__/__mocks__/fileMock.js
@@ -0,0 +1 @@
+module.exports = 'test-file-stub';
diff --git a/src/__tests__/setupTests.ts b/src/__tests__/setupTests.ts
new file mode 100644
index 00000000..913c9e37
--- /dev/null
+++ b/src/__tests__/setupTests.ts
@@ -0,0 +1,42 @@
+import '@testing-library/jest-dom';
+
+// Mock window.electron to simulate Electron IPC bridge in tests
+Object.defineProperty(window, 'electron', {
+	value: {
+		ipcRenderer: {
+			sendMessage: jest.fn(),
+			on: jest.fn().mockReturnValue(() => {}),
+			once: jest.fn(),
+		},
+		electronStore: {
+			get: jest
+				.fn()
+				.mockImplementation(
+					(_key: string, defaultValue: unknown) => defaultValue,
+				),
+			set: jest.fn(),
+		},
+		browserWindow: {
+			reload: jest.fn(),
+			getAlwaysOnTop: jest.fn().mockReturnValue(false),
+			setAlwaysOnTop: jest.fn(),
+			promptHiddenChat: jest.fn(),
+			enableOpenAtLogin: jest.fn(),
+			disableOpenAtLogin: jest.fn(),
+		},
+	},
+	writable: true,
+});
+
+// Mock window.settings to simulate settings IPC bridge in tests
+Object.defineProperty(window, 'settings', {
+	value: {
+		getGlobalShortcut: jest.fn().mockResolvedValue('CommandOrControl+Shift+G'),
+		setGlobalShortcut: jest.fn().mockResolvedValue(undefined),
+		getFocusSuperprompt: jest.fn().mockResolvedValue(false),
+		setFocusSuperprompt: jest.fn().mockResolvedValue(undefined),
+		getPlatform: jest.fn().mockResolvedValue('darwin'),
+		getOpenAtLogin: jest.fn().mockResolvedValue(false),
+	},
+	writable: true,
+});