fix(executor): only strip maxOutputTokens for non-claude models

internal/runtime/executor/antigravity_executor.go

@@ -1419,7 +1419,9 @@ func geminiToAntigravity(modelName string, payload []byte, projectID string) []b
 			})
 			return true
 		})
-	} else {
+	}
+
+	if !strings.Contains(modelName, "claude") {
 		template, _ = sjson.Delete(template, "request.generationConfig.maxOutputTokens")
 	}