fix: CLAUDE.md compatibility for GEMINI.md '@' file import behavior (#2978)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Allen Hutchison <adh@google.com>

scripts/test-windows-paths.js

@@ -0,0 +1,51 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+// Test how paths are normalized
+function testPathNormalization() {
+  // Use platform-agnostic path construction instead of hardcoded paths
+  const testPath = path.join('test', 'project', 'src', 'file.md');
+  const absoluteTestPath = path.resolve('test', 'project', 'src', 'file.md');
+
+  console.log('Testing path normalization:');
+  console.log('Relative path:', testPath);
+  console.log('Absolute path:', absoluteTestPath);
+
+  // Test path.join with different segments
+  const joinedPath = path.join('test', 'project', 'src', 'file.md');
+  console.log('Joined path:', joinedPath);
+
+  // Test path.normalize
+  console.log('Normalized relative path:', path.normalize(testPath));
+  console.log('Normalized absolute path:', path.normalize(absoluteTestPath));
+
+  // Test how the test would see these paths
+  const testContent = `--- File: ${absoluteTestPath} ---\nContent\n--- End of File: ${absoluteTestPath} ---`;
+  console.log('\nTest content with platform-agnostic paths:');
+  console.log(testContent);
+
+  // Try to match with different patterns
+  const marker = `--- File: ${absoluteTestPath} ---`;
+  console.log('\nTrying to match:', marker);
+  console.log('Direct match:', testContent.includes(marker));
+
+  // Test with normalized path in marker
+  const normalizedMarker = `--- File: ${path.normalize(absoluteTestPath)} ---`;
+  console.log(
+    'Normalized marker match:',
+    testContent.includes(normalizedMarker),
+  );
+
+  // Test path resolution
+  const __filename = fileURLToPath(import.meta.url);
+  console.log('\nCurrent file path:', __filename);
+  console.log('Directory name:', path.dirname(__filename));
+}
+
+testPathNormalization();