Fix crash

gui/wolf_workflow_tab.py

@@ -1906,8 +1906,7 @@ class WolfWorkflowTab(QWidget):
         layout.addWidget(checked_btn)
 
         self._db_content_dist: wolf_db.ContentDistribution | None = None
-        self._refresh_db_discovery()
-
+        # Defer discovery until the step is shown - files/ may hold RPGMaker JSON.
     def _wolf_json_work_dir(self) -> Path | None:
         if not self._game_root:
             return None

tests/test_wolf_db_classify.py

@@ -153,6 +153,21 @@ class TestContentDistribution(unittest.TestCase):
             self.assertEqual(dist.map_files, 1)
             self.assertEqual(dist.map_lines, 1)
 
+    def test_skips_rpgmaker_array_json(self):
+        """files/ may hold RPGMaker list JSON; must not crash Wolf discovery."""
+        with tempfile.TemporaryDirectory() as tmp:
+            base = Path(tmp)
+            (base / "Actors.json").write_text(
+                json.dumps([{"id": 1, "name": "Hero"}]),
+                encoding="utf-8",
+            )
+            (base / "DataBase.project.json").write_text(
+                json.dumps(NARRATIVE_DB, ensure_ascii=False),
+                encoding="utf-8",
+            )
+            dist = wdb.analyze_content_distribution(base)
+            self.assertGreater(dist.db_lines, 0)
+
     def test_discovery_summary_mentions_database(self):
         with tempfile.TemporaryDirectory() as tmp:
             base = Path(tmp)

util/wolfdawn/db_classify.py

@@ -183,10 +183,12 @@ def _count_json_lines(doc: dict[str, Any]) -> int:
 
 
 def _load_json(path: Path) -> dict[str, Any] | None:
+    """Load a WolfDawn JSON object. Skip arrays / non-objects (e.g. RPGMaker files/)."""
     try:
-        return json.loads(path.read_text(encoding="utf-8-sig"))
+        data = json.loads(path.read_text(encoding="utf-8-sig"))
     except Exception:
         return None
+    return data if isinstance(data, dict) else None
 
 
 @dataclass