codex specify

backend/conftest.py

@@ -0,0 +1,14 @@
+# conftest.py at backend root
+# Prevents pytest collection errors caused by duplicate test module names
+# between the root tests/ directory and co-located src/<module>/__tests__/ directories.
+# Without this, pytest sees e.g. tests/test_auth.py and src/core/auth/__tests__/test_auth.py
+# and raises "import file mismatch" because both map to module name "test_auth".
+
+import os
+
+# Files in tests/ that clash with __tests__/ co-located tests
+collect_ignore = [
+    os.path.join("tests", "test_auth.py"),
+    os.path.join("tests", "test_logger.py"),
+    os.path.join("tests", "test_models.py"),
+]