refactor: improve component loading logic and add resource directory check

src/langbot/pkg/discover/engine.py

@@ -241,12 +241,14 @@ class ComponentDiscoveryEngine:
                 return
 
             for file in importutil.list_resource_files(path):
-                if (not os.path.isdir(os.path.join(path, file))) and (file.endswith('.yaml') or file.endswith('.yml')):
-                    comp = self.load_component_manifest(os.path.join(path, file), owner, no_save)
+                file_path = os.path.join(path, file)
+                is_dir = importutil.is_resource_dir(file_path)
+                if (not is_dir) and (file.endswith('.yaml') or file.endswith('.yml')):
+                    comp = self.load_component_manifest(file_path, owner, no_save)
                     if comp is not None:
                         components.append(comp)
-                elif os.path.isdir(os.path.join(path, file)):
-                    recursive_load_component_manifests_in_dir(os.path.join(path, file), depth + 1)
+                elif is_dir:
+                    recursive_load_component_manifests_in_dir(file_path, depth + 1)
 
         recursive_load_component_manifests_in_dir(path)
         return components

src/langbot/pkg/platform/adapters/telegram/manifest.yaml

@@ -93,5 +93,5 @@ spec:
 
 execution:
   python:
-    path: pkg/platform/adapters/telegram/adapter.py
+    path: ./adapter.py
     attr: TelegramAdapter

src/langbot/pkg/utils/importutil.py

@@ -47,3 +47,10 @@ def read_resource_file_bytes(resource_path: str) -> bytes:
 
 def list_resource_files(resource_path: str) -> list[str]:
     return [f.name for f in importlib.resources.files('langbot').joinpath(resource_path).iterdir()]
+
+
+def is_resource_dir(resource_path: str) -> bool:
+    try:
+        return importlib.resources.files('langbot').joinpath(resource_path).is_dir()
+    except (TypeError, FileNotFoundError):
+        return False

src/langbot/templates/components.yaml

@@ -10,6 +10,8 @@ spec:
     MessagePlatformAdapter:
       fromDirs:
         - path: pkg/platform/sources/
+        - path: pkg/platform/adapters/
+          maxDepth: 3
     LLMAPIRequester:
       fromDirs:
         - path: pkg/provider/modelmgr/requesters/