From 415b89440536c1f49ab358f52adc7be0a1009add Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Thu, 2 Apr 2026 12:54:20 +0000
Subject: [PATCH] fix: wrap sync instructor.to_json() in asyncio.to_thread for
 ato_json
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Addresses Cursor Bugbot feedback: the function-calling path in ato_json
was still calling _create_instructor().to_json() synchronously, blocking
the event loop. Now wrapped in asyncio.to_thread() to offload the
blocking call to a separate thread.

Co-Authored-By: João <joao@crewai.com>
---
 lib/crewai/src/crewai/utilities/converter.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/crewai/src/crewai/utilities/converter.py b/lib/crewai/src/crewai/utilities/converter.py
index d253cc6e6..825c70792 100644
--- a/lib/crewai/src/crewai/utilities/converter.py
+++ b/lib/crewai/src/crewai/utilities/converter.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import json
 import re
 from typing import TYPE_CHECKING, Any, Final, TypedDict
@@ -225,7 +226,7 @@ class Converter(OutputConverter):
         """
         try:
             if self.llm.supports_function_calling():
-                return self._create_instructor().to_json()
+                return await asyncio.to_thread(self._create_instructor().to_json)
             return json.dumps(
                 await self.llm.acall(
                     [