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Fix 'undefined message' error when using interrupt and Command({ resume }) in LangGraph

Fix 'undefined message' error when using interrupt and Command({ resume }) in LangGraph

Fix the 'Cannot read properties of undefined (reading message)' error in LangGraphJS when using interrupt and Command({ resume }). The solution involves adding a ToolMessage on rejection to keep the message history valid.

ChatGPThow-tointermediate9 min read
How to Turn Off or Minimize Reasoning in GPT-5-Nano

How to Turn Off or Minimize Reasoning in GPT-5-Nano

Learn how to turn off or minimize reasoning in GPT-5-Nano using the reasoning parameter. Includes the correct dictionary format, code examples, and troubleshooting for empty responses.

ChatGPThow-tointermediate13 min read