[BUGFIX] Adjust smart routing / model switching

Author: o-ba

Classes/Domain/Model/AiProviderManifest.php

@@ -97,19 +97,23 @@ private function getSpecializedCapabilities(): array
         if ($this->modelCapabilities === []) {
             return [];
         }
-        // Collect capabilities that ONLY appear in models with a reduced set
-        $allProviderCapabilities = count($this->capabilities);
+        // Use the maximum capability count of any listed model as the threshold.
+        // Comparing against count($this->capabilities) (ALL_CAPABILITIES) breaks
+        // when provider-level capabilities include interfaces no model in the
+        // catalog supports (e.g. TranslationCapableInterface), because then every
+        // model is considered "reduced" and every capability becomes specialized.
+        $maxModelCapabilities = max(array_map('count', $this->modelCapabilities));
         $specialized = [];
         foreach ($this->modelCapabilities as $caps) {
-            if (count($caps) < $allProviderCapabilities) {
+            if (count($caps) < $maxModelCapabilities) {
                 foreach ($caps as $cap) {
                     $specialized[$cap] = true;
                 }
             }
         }
         // Remove capabilities that also appear in models with the full set
         foreach ($this->modelCapabilities as $caps) {
-            if (count($caps) >= $allProviderCapabilities) {
+            if (count($caps) >= $maxModelCapabilities) {
                 foreach ($caps as $cap) {
                     unset($specialized[$cap]);
                 }

Classes/Provider/ProviderResolver.php

@@ -330,17 +330,18 @@ public function resolveAllForCapability(string $capabilityFqcn): array
             }
         }
 
-        $result = array_merge($defaults, $others);
-
-        // If no direct matches, try auto model switch
-        if ($result === []) {
+        // If no default directly supports the capability, try auto model switch first.
+        // This ensures a default provider's alternative model (e.g. OpenAI → text-embedding-ada-002)
+        // takes priority over a non-default that only claims support via empty modelCapabilities
+        // (e.g. Ollama with a dynamic catalog where every model appears capable of everything).
+        if ($defaults === []) {
             $switched = $this->tryAutoModelSwitch($capabilityFqcn, $configurations);
             if ($switched !== null) {
-                $result[] = $switched;
+                array_unshift($others, $switched);
             }
         }
 
-        return $result;
+        return array_merge($defaults, $others);
     }
 
     /**