diff --git a/packages/cli-kit/src/public/node/vscode.test.ts b/packages/cli-kit/src/public/node/vscode.test.ts
index 58bc65fd552..b40b3de7e9f 100644
--- a/packages/cli-kit/src/public/node/vscode.test.ts
+++ b/packages/cli-kit/src/public/node/vscode.test.ts
@@ -1,5 +1,5 @@
-import {isVSCode} from './vscode.js'
-import {inTemporaryDirectory, mkdir} from './fs.js'
+import {addRecommendedExtensions, isVSCode} from './vscode.js'
+import {fileExists, inTemporaryDirectory, mkdir, readFile, writeFile} from './fs.js'
 import {joinPath} from './path.js'
 import {describe, expect, test} from 'vitest'
 
@@ -19,3 +19,62 @@ describe('isVSCode', () => {
     })
   })
 })
+
+describe('addRecommendedExtensions', () => {
+  test('does nothing if the directory does not have a .vscode folder', async () => {
+    await inTemporaryDirectory(async (tmpDir) => {
+      // Given
+      const extensionsPath = joinPath(tmpDir, '.vscode/extensions.json')
+
+      // When
+      await addRecommendedExtensions(tmpDir, ['shopify.shopify-cli-extensions'])
+
+      // Then
+      await expect(fileExists(extensionsPath)).resolves.toEqual(false)
+    })
+  })
+
+  test('creates extensions.json with the recommendations if .vscode folder exists but no extensions.json exists', async () => {
+    await inTemporaryDirectory(async (tmpDir) => {
+      // Given
+      await mkdir(joinPath(tmpDir, '.vscode'))
+      const extensionsPath = joinPath(tmpDir, '.vscode/extensions.json')
+
+      // When
+      await addRecommendedExtensions(tmpDir, ['shopify.shopify-cli-extensions'])
+
+      // Then
+      await expect(fileExists(extensionsPath)).resolves.toEqual(true)
+      const content = await readFile(extensionsPath)
+      const parsed = JSON.parse(content)
+      expect(parsed).toEqual({
+        recommendations: ['shopify.shopify-cli-extensions'],
+      })
+    })
+  })
+
+  test('appends recommendations to the existing ones in extensions.json if both .vscode folder and extensions.json exist', async () => {
+    await inTemporaryDirectory(async (tmpDir) => {
+      // Given
+      await mkdir(joinPath(tmpDir, '.vscode'))
+      const extensionsPath = joinPath(tmpDir, '.vscode/extensions.json')
+      const initialJson = {
+        recommendations: ['ms-sarah.another-ext'],
+        otherSetting: true,
+      }
+      await writeFile(extensionsPath, JSON.stringify(initialJson, null, 2))
+
+      // When
+      await addRecommendedExtensions(tmpDir, ['shopify.shopify-cli-extensions'])
+
+      // Then
+      await expect(fileExists(extensionsPath)).resolves.toEqual(true)
+      const content = await readFile(extensionsPath)
+      const parsed = JSON.parse(content)
+      expect(parsed).toEqual({
+        recommendations: ['ms-sarah.another-ext', 'shopify.shopify-cli-extensions'],
+        otherSetting: true,
+      })
+    })
+  })
+})