fix: OpenAI tools (#328)

- MCP tool params schema lost causing all MCP not working well
- Compatible with occasional llm return tool call parameters that are invalid json

packages/core/src/utils/safeJsonParse.ts

@@ -0,0 +1,45 @@
+/**
+ * @license
+ * Copyright 2025 Qwen
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { jsonrepair } from 'jsonrepair';
+
+/**
+ * Safely parse JSON string with jsonrepair fallback for malformed JSON.
+ * This function attempts to parse JSON normally first, and if that fails,
+ * it uses jsonrepair to fix common JSON formatting issues before parsing.
+ *
+ * @param jsonString - The JSON string to parse
+ * @param fallbackValue - The value to return if parsing fails completely
+ * @returns The parsed object or the fallback value
+ */
+export function safeJsonParse<T = Record<string, unknown>>(
+  jsonString: string,
+  fallbackValue: T = {} as T,
+): T {
+  if (!jsonString || typeof jsonString !== 'string') {
+    return fallbackValue;
+  }
+
+  try {
+    // First attempt: try normal JSON.parse
+    return JSON.parse(jsonString) as T;
+  } catch (error) {
+    try {
+      // Second attempt: use jsonrepair to fix common JSON issues
+      const repairedJson = jsonrepair(jsonString);
+
+      // jsonrepair always returns a string, so we need to parse it
+      return JSON.parse(repairedJson) as T;
+    } catch (repairError) {
+      console.error('Failed to parse JSON even with jsonrepair:', {
+        originalError: error,
+        repairError,
+        jsonString,
+      });
+      return fallbackValue;
+    }
+  }
+}