feat(opencode): use reasoning summary auto for gpt-5 models that are not chat (#12502)

packages/opencode/src/provider/transform.ts

@@ -646,6 +646,7 @@ export namespace ProviderTransform {
     if (input.model.api.id.includes("gpt-5") && !input.model.api.id.includes("gpt-5-chat")) {
       if (!input.model.api.id.includes("gpt-5-pro")) {
         result["reasoningEffort"] = "medium"
+        result["reasoningSummary"] = "auto"
       }
 
       // Only set textVerbosity for non-chat gpt-5.x models