fix: use configured collection in recovery paths

tests/test_mcp_server.py

@@ -484,6 +484,26 @@ class TestWriteTools:
         assert result2["success"] is True
         assert result2["reason"] == "already_exists"
 
+    def test_add_drawer_fails_when_readback_misses(self, monkeypatch, config, kg):
+        _patch_mcp_server(monkeypatch, config, kg)
+        from mempalace import mcp_server
+
+        class _FakeGetResult:
+            ids = []
+
+        class _FakeCol:
+            def get(self, **kwargs):
+                return _FakeGetResult()
+
+            def upsert(self, **kwargs):
+                return None
+
+        monkeypatch.setattr(mcp_server, "_get_collection", lambda create=False: _FakeCol())
+
+        result = mcp_server.tool_add_drawer("w", "r", "content")
+        assert result["success"] is False
+        assert "not readable" in result["error"]
+
     def test_add_drawer_shared_header_no_collision(self, monkeypatch, config, palace_path, kg):
         """Documents sharing a >100-char header must get distinct IDs (full-content hash)."""
         _patch_mcp_server(monkeypatch, config, kg)
@@ -503,9 +523,9 @@ class TestWriteTools:
 
         assert result1["success"] is True
         assert result2["success"] is True
-        assert (
-            result1["drawer_id"] != result2["drawer_id"]
-        ), "Documents with shared header but different content must have distinct drawer IDs"
+        assert result1["drawer_id"] != result2["drawer_id"], (
+            "Documents with shared header but different content must have distinct drawer IDs"
+        )
 
     def test_delete_drawer(self, monkeypatch, config, palace_path, seeded_collection, kg):
         _patch_mcp_server(monkeypatch, config, kg)
@@ -1158,6 +1178,25 @@ class TestCacheInvalidation:
         assert "Reconnected" in result["message"]
         assert isinstance(result["drawers"], int)
 
+    def test_reconnect_closes_shared_backend(self, monkeypatch, config, kg):
+        _patch_mcp_server(monkeypatch, config, kg)
+        from unittest.mock import MagicMock
+
+        from mempalace import mcp_server, palace
+
+        close_palace = MagicMock()
+        monkeypatch.setattr(palace._DEFAULT_BACKEND, "close_palace", close_palace)
+
+        class _FakeCol:
+            def count(self):
+                return 7
+
+        monkeypatch.setattr(mcp_server, "_get_collection", lambda create=False: _FakeCol())
+
+        result = mcp_server.tool_reconnect()
+        assert result["success"] is True
+        close_palace.assert_called_once_with(config.palace_path)
+
     def test_get_collection_create_true_avoids_get_or_create_on_reopen(
         self, monkeypatch, config, palace_path, kg
     ):