Python @directory walk asserts the directory stays empty; manifest comment names the write paths

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

packages/cultcache-py/tests/test_cultcache.py

@@ -1606,14 +1606,12 @@ class CultCacheTests(unittest.TestCase):
                         # A path that cannot be reached as a file stays an OSError (_read_store): not a store that failed to decode.
                         with self.assertRaises(OSError, msg=f"{vector} {operation}"):
                             run()
+                        self.assertTrue(store_path.is_dir() and not any(store_path.iterdir()), f"{vector} {operation} touched the directory")
                     else:
                         with self.assertRaises(StoreUnreadableError, msg=f"{vector} {operation}") as refused:
                             run()
                         self.assertIsNotNone(refused.exception.__cause__, f"{vector} {operation}")
-                        if content is None:
-                            self.assertTrue(store_path.is_dir() and not any(store_path.iterdir()), f"{vector} {operation} touched the directory")
-                        else:
-                            self.assertEqual(store_path.read_bytes(), content, f"{vector} {operation} rewrote a file it cannot read")
+                        self.assertEqual(store_path.read_bytes(), content, f"{vector} {operation} rewrote a file it cannot read")
 
     @staticmethod
     def _rec(type: str, key: str, second: int = 0) -> CultCacheEnvelope:

tests/vectors/document-variants-c2a/readability/manifest.txt

@@ -1,7 +1,7 @@
 # Whether each runtime's own reader opens the file. A flush and a commit replace a file exactly when it reads; where a runtime has a soft flush (TypeScript, Rust) it leaves a file that reads byte for byte and refuses one that does not.
 # A store holding two records under one key is unreadable; keys are ordinal strings (no case folding, no normalisation), so distinct spellings are distinct keys.
 # Columns: file, csharp, rust, typescript, python. `../v3-base.msgpack` is the one valid store.
-# `@directory` is no file: the walker makes an empty directory at the store path and every runtime must refuse to open it.
+# `@directory` is no file: the walker makes an empty directory at the store path and every runtime must refuse to open it and to write over it (flush, commit, delete), leaving the directory empty.
 ../v3-base.msgpack  reads    reads    reads    reads
 zero-byte.bin       refuses  refuses  refuses  refuses
 empty-array.bin     reads    reads    reads    reads