fix(genbi): treat non-dict apps.yml entries as missing

core/wren/src/wren/genbi/index.py

@@ -103,13 +103,20 @@ def remove_app(project_path: Path, name: str) -> bool:
 
 def get_app(project_path: Path, name: str) -> dict | None:
     """Return the entry for ``name`` or None if not registered."""
-    return load_index(project_path)["apps"].get(name)
+    entry = load_index(project_path)["apps"].get(name)
+    # Hand-edited apps.yml may put a scalar/list under an app key; treat as
+    # unregistered rather than letting callers AttributeError on .get keys.
+    if entry is not None and not isinstance(entry, dict):
+        return None
+    return entry
 
 
 def update_app(project_path: Path, name: str, **fields) -> dict:
     """Merge ``fields`` into the entry for ``name`` and persist."""
     index = load_index(project_path)
-    entry = index["apps"][name]
+    entry = index["apps"].get(name)
+    if not isinstance(entry, dict):
+        raise KeyError(name)
     entry.update(fields)
     save_index(project_path, index)
     return entry

core/wren/tests/unit/test_genbi_get_app_guard.py

@@ -0,0 +1,13 @@
+from pathlib import Path
+
+import yaml
+
+from wren.genbi.index import get_app, load_index, save_index
+
+
+def test_get_app_skips_non_dict_entry(tmp_path: Path):
+    idx = {"schema_version": 1, "apps": {"bad": "not-a-map", "good": {"source": "apps/good"}}}
+    save_index(tmp_path, idx)
+    assert get_app(tmp_path, "bad") is None
+    assert get_app(tmp_path, "good") == {"source": "apps/good"}
+    assert get_app(tmp_path, "missing") is None