Improve LLM model iteration and metadata handling

Added __iter__ to LlmModelMeta for dynamic model iteration and updated metadata retrieval to handle missing registry entries gracefully. Fixed BlockSchema cached_jsonschema initialization and improved discriminator mapping refresh logic. Updated NodeInputs to display beautified string if label is missing.

autogpt_platform/backend/backend/blocks/llm.py

@@ -114,6 +114,15 @@ class LlmModelMeta(type):
 
         return cls(slug)
 
+    def __iter__(cls):
+        """Iterate over all models from the registry.
+
+        Yields LlmModel instances for each model in the dynamic registry.
+        Used by __get_pydantic_json_schema__ to build model metadata.
+        """
+        for model in llm_registry.iter_dynamic_models():
+            yield cls(model.slug)
+
 
 class LlmModel(str, metaclass=LlmModelMeta):
     """
@@ -178,7 +187,12 @@ class LlmModel(str, metaclass=LlmModelMeta):
         llm_model_metadata = {}
         for model in cls:
             model_name = model.value
-            metadata = model.metadata
+            # Use registry directly with None check to gracefully handle
+            # missing metadata during startup/import before registry is populated
+            metadata = llm_registry.get_llm_model_metadata(model_name)
+            if metadata is None:
+                # Skip models without metadata (registry not yet populated)
+                continue
             llm_model_metadata[model_name] = {
                 "creator": metadata.creator_name,
                 "creator_name": metadata.creator_name,

autogpt_platform/backend/backend/data/block.py

@@ -259,7 +259,7 @@ class BlockSchema(BaseModel):
         super().__pydantic_init_subclass__(**kwargs)
 
         # Reset cached JSON schema to prevent inheriting it from parent class
-        cls.cached_jsonschema = {}
+        cls.cached_jsonschema = None
 
         credentials_fields = cls.get_credentials_fields()
 

autogpt_platform/backend/backend/data/llm_registry/schema_utils.py

@@ -82,7 +82,7 @@ def refresh_llm_discriminator_mapping(field_schema: dict[str, Any]) -> None:
 
     # Always refresh the mapping to get latest models
     fresh_mapping = get_llm_discriminator_mapping()
-    if fresh_mapping:
+    if fresh_mapping is not None:
         field_schema["discriminator_mapping"] = fresh_mapping
 
 

autogpt_platform/frontend/src/app/(platform)/build/components/legacy-builder/NodeInputs.tsx

@@ -1161,7 +1161,7 @@ const NodeStringInput: FC<{
                 value={option.value}
                 title={option.description}
               >
-                {option.label}
+                {option.label || beautifyString(option.value)}
               </SelectItem>
             ))}
           </SelectContent>