diff --git a/examples/cjs-js/haetae.config.mjs b/examples/cjs-js/haetae.config.mjs
index 5b1c821..354fc1a 100644
--- a/examples/cjs-js/haetae.config.mjs
+++ b/examples/cjs-js/haetae.config.mjs
@@ -9,7 +9,7 @@ export default configure({
       env: {
         foo: 'bar',
       },
-      run: () => ({ hi: 'there' }),
+      run: () => console.log('hi!'),
     },
   },
 })
diff --git a/examples/cjs-ts-1/haetae.config.mts b/examples/cjs-ts-1/haetae.config.mts
index 5b1c821..354fc1a 100644
--- a/examples/cjs-ts-1/haetae.config.mts
+++ b/examples/cjs-ts-1/haetae.config.mts
@@ -9,7 +9,7 @@ export default configure({
       env: {
         foo: 'bar',
       },
-      run: () => ({ hi: 'there' }),
+      run: () => console.log('hi!'),
     },
   },
 })
diff --git a/examples/cjs-ts-2/haetae.config.mts b/examples/cjs-ts-2/haetae.config.mts
index 5b1c821..354fc1a 100644
--- a/examples/cjs-ts-2/haetae.config.mts
+++ b/examples/cjs-ts-2/haetae.config.mts
@@ -9,7 +9,7 @@ export default configure({
       env: {
         foo: 'bar',
       },
-      run: () => ({ hi: 'there' }),
+      run: () => console.log('hi!'),
     },
   },
 })
diff --git a/examples/esm-js/haetae.config.js b/examples/esm-js/haetae.config.js
index f7c57a9..354fc1a 100644
--- a/examples/esm-js/haetae.config.js
+++ b/examples/esm-js/haetae.config.js
@@ -2,14 +2,14 @@ import { configure } from 'haetae'
 
 export default configure({
   commands: {
-    foo: {
+    helloworld: {
       run: () => ({ hello: 'world' }),
     },
-    bar: {
+    hi: {
       env: {
-        hi: 'there',
+        foo: 'bar',
       },
-      run: () => ({ hello: 'world' }),
+      run: () => console.log('hi!'),
     },
   },
 })
diff --git a/examples/esm-ts/haetae.config.ts b/examples/esm-ts/haetae.config.ts
index 5b1c821..354fc1a 100644
--- a/examples/esm-ts/haetae.config.ts
+++ b/examples/esm-ts/haetae.config.ts
@@ -9,7 +9,7 @@ export default configure({
       env: {
         foo: 'bar',
       },
-      run: () => ({ hi: 'there' }),
+      run: () => console.log('hi!'),
     },
   },
 })
diff --git a/examples/my-calculator/README.md b/examples/my-calculator/README.md
new file mode 100644
index 0000000..878f025
--- /dev/null
+++ b/examples/my-calculator/README.md
@@ -0,0 +1,3 @@
+# my-calculator-test
+
+This is an example project guided by the official *Getting Started* docs.
diff --git a/examples/my-calculator/haetae.config.js b/examples/my-calculator/haetae.config.js
new file mode 100644
index 0000000..bd49442
--- /dev/null
+++ b/examples/my-calculator/haetae.config.js
@@ -0,0 +1,25 @@
+import { configure, $, git, js, utils } from 'haetae'
+
+export default configure({
+  commands: {
+    test: {
+      run: async () => {
+        // An array of changed files
+        const changedFiles = await git.changedFiles()
+        // console.log(changedFiles)
+        // An array of test files that (transitively) depend on changed files
+        const affectedTestFiles = await js.dependOn({
+          dependents: ['**/*.test.js'], // glob pattern
+          // dependents: await utils.glob(['**/*.test.js']), // glob pattern
+          dependencies: changedFiles,
+        })
+
+        if (affectedTestFiles.length > 0) {
+          // Equals to "pnpm jest /path/to/foo.test.ts /path/to/bar.test.ts ..."
+          // Change 'pnpm jest' to your test runner.
+          await $`pnpm jest ${affectedTestFiles}`
+        }
+      },
+    },
+  },
+})
diff --git a/examples/my-calculator/package.json b/examples/my-calculator/package.json
new file mode 100644
index 0000000..ee0d5cc
--- /dev/null
+++ b/examples/my-calculator/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "my-calculator",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "haetae": "haetae",
+    "ht": "haetae",
+    "jest": "cross-env NODE_OPTIONS=--experimental-vm-modules jest",
+    "test": "haetae test"
+  },
+  "devDependencies": {
+    "cross-env": "^7.0.3",
+    "haetae": "workspace:*",
+    "jest": "^29.5.0"
+  }
+}
diff --git a/examples/my-calculator/src/add.js b/examples/my-calculator/src/add.js
new file mode 100644
index 0000000..d64a34e
--- /dev/null
+++ b/examples/my-calculator/src/add.js
@@ -0,0 +1,3 @@
+export default function add(a, b) {
+  return a + b
+}
diff --git a/examples/my-calculator/src/exponent.js b/examples/my-calculator/src/exponent.js
new file mode 100644
index 0000000..79981a7
--- /dev/null
+++ b/examples/my-calculator/src/exponent.js
@@ -0,0 +1,10 @@
+import multiply from './multiply.js'
+
+export default function exponent(a, b) {
+  let agg = 1
+  for (let i = 0; i < b; i += 1) {
+    agg = multiply(agg, a)
+  }
+
+  return agg // === a^b
+}
diff --git a/examples/my-calculator/src/multiply.js b/examples/my-calculator/src/multiply.js
new file mode 100644
index 0000000..8eb339b
--- /dev/null
+++ b/examples/my-calculator/src/multiply.js
@@ -0,0 +1,10 @@
+import add from './add.js'
+
+export default function multiply(a, b) {
+  let agg = 0
+  for (let i = 0; i < b; i += 1) {
+    agg = add(agg, a)
+  }
+
+  return agg // === a * b
+}
diff --git a/examples/my-calculator/src/subtract.js b/examples/my-calculator/src/subtract.js
new file mode 100644
index 0000000..d524d36
--- /dev/null
+++ b/examples/my-calculator/src/subtract.js
@@ -0,0 +1,5 @@
+import add from './add.js'
+
+export default function subtract(a, b) {
+  return add(a, -b) // a - b
+}
diff --git a/examples/my-calculator/test/add.test.js b/examples/my-calculator/test/add.test.js
new file mode 100644
index 0000000..5d0a697
--- /dev/null
+++ b/examples/my-calculator/test/add.test.js
@@ -0,0 +1,9 @@
+import add from '../src/add.js'
+
+describe('add()', () => {
+  test('basic usage', () => {
+    expect(add(1, 2)).toBe(3)
+    expect(add(4, 2)).toBe(6)
+    expect(add(12, 5)).toBe(17)
+  })
+})
diff --git a/examples/my-calculator/test/exponent.test.js b/examples/my-calculator/test/exponent.test.js
new file mode 100644
index 0000000..7f9986a
--- /dev/null
+++ b/examples/my-calculator/test/exponent.test.js
@@ -0,0 +1,9 @@
+import exponent from '../src/exponent.js'
+
+describe('exponent()', () => {
+  test('basic usage', () => {
+    expect(exponent(0, 2)).toBe(0)
+    expect(exponent(1, 3)).toBe(1)
+    expect(exponent(2, 4)).toBe(16)
+  })
+})
diff --git a/examples/my-calculator/test/multiply.test.js b/examples/my-calculator/test/multiply.test.js
new file mode 100644
index 0000000..397d7dc
--- /dev/null
+++ b/examples/my-calculator/test/multiply.test.js
@@ -0,0 +1,9 @@
+import multiply from '../src/multiply.js'
+
+describe('multiply()', () => {
+  test('basic usage', () => {
+    expect(multiply(1, 1)).toBe(1)
+    expect(multiply(2, 4)).toBe(8)
+    expect(multiply(3, 3)).toBe(9)
+  })
+})
diff --git a/examples/my-calculator/test/subtract.test.js b/examples/my-calculator/test/subtract.test.js
new file mode 100644
index 0000000..dad7d5a
--- /dev/null
+++ b/examples/my-calculator/test/subtract.test.js
@@ -0,0 +1,9 @@
+import subtract from '../src/subtract.js'
+
+describe('subtract()', () => {
+  test('basic usage', () => {
+    expect(subtract(1, 2)).toBe(-1)
+    expect(subtract(4, 2)).toBe(2)
+    expect(subtract(12, 5)).toBe(7)
+  })
+})
diff --git a/package.json b/package.json
index 680ba95..aec5d7c 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,8 @@
     "lint:ci": "eslint \"*.{js,cjs,mjs,jsx,ts,cts,mts,tsx,md,mdx}\"",
     "lint:md": "pnpm lint:md:ci --fix",
     "lint:md:ci": "markdownlint",
-    "test": "cross-env NODE_OPTIONS=--experimental-vm-modules jest --coverage",
+    "jest": "cross-env NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 jest",
+    "test": "cross-env NODE_OPTIONS=--experimental-vm-modules NODE_NO_WARNINGS=1 jest --coverage",
     "husky-skip": "cross-env HUSKY=0",
     "commit": "git cz",
     "prepare": "husky install",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index dafb89c..e2209b2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -195,6 +195,18 @@ importers:
         specifier: ^4.8.2
         version: 4.8.2
 
+  examples/my-calculator:
+    devDependencies:
+      cross-env:
+        specifier: ^7.0.3
+        version: 7.0.3
+      haetae:
+        specifier: workspace:*
+        version: link:../../packages/haetae
+      jest:
+        specifier: ^29.5.0
+        version: 29.5.0(@types/node@18.6.0)(ts-node@10.9.1)
+
   packages/cli:
     dependencies:
       '@haetae/common':
@@ -6560,7 +6572,7 @@ packages:
     resolution: {integrity: sha512-Kijeg9Dag6CKtIDA7O21zNTACqD5MD/8HfIV8pdD94vFyFuer52SigdC3IQMhab3vACxXMiFk+yMHNdbqtyTGA==}
     engines: {node: ^14.15.0 || ^16.10.0 || >=18.0.0}
     dependencies:
-      '@babel/code-frame': 7.22.5
+      '@babel/code-frame': 7.22.13
       '@jest/types': 29.5.0
       '@types/stack-utils': 2.0.1
       chalk: 4.1.2