Fix invalid PEP 723 header in new-script template

files/templates/new723ScriptTemplate/script.py

@@ -1,4 +1,4 @@
-# /// script_name
+# /// script
 # requires-python = ">=X.XX" TODO: Update this to the minimum Python version you want to support
 # dependencies = [
 #   TODO: Add any dependencies your script requires

src/test/features/creators/newScriptProject.unit.test.ts

@@ -0,0 +1,44 @@
+import assert from 'assert';
+import * as fs from 'fs-extra';
+import * as os from 'os';
+import * as path from 'path';
+
+// Path to the real script template, resolved from the compiled test location
+// (out/test/features/creators/ → workspaceRoot/files/templates/...). We do NOT
+// rely on `NEW_PROJECT_TEMPLATES_FOLDER` because it is anchored at
+// `path.dirname(__dirname)` of the compiled `constants.js`, which resolves to
+// `out/` in test mode and does not contain the bundled template tree.
+const TEMPLATE_PATH = path.join(
+    __dirname,
+    '..',
+    '..',
+    '..',
+    '..',
+    'files',
+    'templates',
+    'new723ScriptTemplate',
+    'script.py',
+);
+
+suite('new723ScriptTemplate / NewScriptProject', () => {
+    let tmpDir: string;
+
+    setup(async () => {
+        tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'new-script-test-'));
+    });
+
+    teardown(async () => {
+        await fs.remove(tmpDir);
+    });
+
+    test('Template file starts with a valid PEP 723 header (# /// script)', async () => {
+        const contents = await fs.readFile(TEMPLATE_PATH, 'utf8');
+        const firstNonBlankLine = contents.split(/\r?\n/).find((l) => l.trim().length > 0);
+
+        assert.strictEqual(
+            firstNonBlankLine,
+            '# /// script',
+            'Template must start with a valid PEP 723 `script` header line',
+        );
+    });
+});