fix(provider): preserve local agent model compatibility

src/langbot/pkg/provider/runners/localagent.py

@@ -279,12 +279,9 @@ class LocalAgentRunner(runner.RequestRunner):
             else 'provider_default'
         )
         reasoning_config = modelmgr_reasoning.normalize_reasoning_config({'level': level})
-        return modelmgr_requester.RuntimeLLMModel(
-            execution_context=model.execution_context,
-            model_entity=model.model_entity,
-            provider=model.provider,
-            reasoning_config_override=reasoning_config,
-        )
+        configured_model = copy.copy(model)
+        configured_model.reasoning_config_override = reasoning_config
+        return configured_model
 
     async def _invoke_with_fallback(
         self,

tests/unit_tests/provider/test_model_service.py

@@ -377,6 +377,10 @@ async def test_local_agent_applies_reasoning_per_fallback_model():
         {'level': 'low'},
         {'level': 'high'},
     ]
+    assert candidates[0] is not primary
+    assert candidates[1] is not fallback
+    assert primary.reasoning_config_override is None
+    assert fallback.reasoning_config_override is None
 
 
 def test_local_agent_rejects_invalid_pipeline_reasoning_level():

web/src/app/home/components/dynamic-form/DynamicFormItemComponent.tsx

@@ -915,9 +915,7 @@ export default function DynamicFormItemComponent({
                       ).filter(
                         (entry): entry is [string, ReasoningLevel] =>
                           typeof entry[1] === 'string' &&
-                          REASONING_LEVELS.includes(
-                            entry[1] as ReasoningLevel,
-                          ),
+                          REASONING_LEVELS.includes(entry[1] as ReasoningLevel),
                       ),
                     ) as Record<string, ReasoningLevel>)
                   : {},
@@ -1108,15 +1106,16 @@ export default function DynamicFormItemComponent({
 
       const renderReasoningPicker = (modelUuid: string) => {
         if (!modelUuid) return null;
-        const model = llmModels.find((candidate) => candidate.uuid === modelUuid);
+        const model = llmModels.find(
+          (candidate) => candidate.uuid === modelUuid,
+        );
         const currentLevel =
           modelValue.reasoning[modelUuid] || 'provider_default';
         const availableLevels = model?.reasoning_capabilities?.levels || [
           'provider_default',
         ];
         const levels = REASONING_LEVELS.filter(
-          (level) =>
-            availableLevels.includes(level) || level === currentLevel,
+          (level) => availableLevels.includes(level) || level === currentLevel,
         );
 
         return (