diff --git a/mempalace/cli.py b/mempalace/cli.py
index 1d56f88e1c..3204160e1c 100644
--- a/mempalace/cli.py
+++ b/mempalace/cli.py
@@ -1188,8 +1188,13 @@ def cmd_purge(args):
     where = clauses[0] if len(clauses) == 1 else {"$and": clauses}
 
     backend = ChromaBackend()
+    from .backends.base import PalaceRef
+
     try:
-        col = backend.get_collection(palace_path, "mempalace_drawers")
+        col = backend.get_collection(
+            palace=PalaceRef(id=palace_path, local_path=palace_path),
+            collection_name="mempalace_drawers",
+        )
     except Exception as e:
         print(f"\n  Error reading palace: {e}")
         return
@@ -1278,8 +1283,13 @@ def cmd_mined(args):
         return
 
     backend = ChromaBackend()
+    from .backends.base import PalaceRef
+
     try:
-        col = backend.get_collection(palace_path, "mempalace_drawers")
+        col = backend.get_collection(
+            palace=PalaceRef(id=palace_path, local_path=palace_path),
+            collection_name="mempalace_drawers",
+        )
     except Exception as e:
         print(f"\n  Error reading palace: {e}")
         return
@@ -1486,10 +1496,14 @@ def cmd_repair(args):
     print(f"  Palace: {palace_path}")
 
     backend = ChromaBackend()
+    from .backends.base import PalaceRef
 
     # Try to read existing drawers
     try:
-        col = backend.get_collection(palace_path, collection_name)
+        col = backend.get_collection(
+            palace=PalaceRef(id=palace_path, local_path=palace_path),
+            collection_name=collection_name,
+        )
         total = col.count()
         print(f"  Drawers found: {total}")
     except Exception as e:
@@ -1641,8 +1655,13 @@ def cmd_compress(args):
 
     # Connect to palace
     backend = ChromaBackend()
+    from .backends.base import PalaceRef
+
     try:
-        col = backend.get_collection(palace_path, "mempalace_drawers")
+        col = backend.get_collection(
+            palace=PalaceRef(id=palace_path, local_path=palace_path),
+            collection_name="mempalace_drawers",
+        )
     except Exception:
         print(f"\n  No palace found at {palace_path}")
         print("  Run: mempalace init <dir> then mempalace mine <dir>")
diff --git a/tests/test_cli.py b/tests/test_cli.py
index bbb3d8e901..b8c6b1e08a 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1195,7 +1195,14 @@ def test_cmd_repair_uses_configured_collection(mock_config_cls, tmp_path, capsys
 
     out = capsys.readouterr().out
     assert "Repair complete" in out
-    mock_backend.get_collection.assert_called_once_with(str(palace_dir), "custom_drawers")
+    # Migrated to kwargs-only PalaceRef form in #37 — the assertion checks
+    # call shape, so it has to track the new signature.
+    from mempalace.backends.base import PalaceRef as _PalaceRef
+
+    mock_backend.get_collection.assert_called_once_with(
+        palace=_PalaceRef(id=str(palace_dir), local_path=str(palace_dir)),
+        collection_name="custom_drawers",
+    )
     assert mock_backend.create_collection.call_args_list == [
         call(str(palace_dir), "custom_drawers__repair_tmp"),
         call(str(palace_dir), "custom_drawers"),