fix an error where role 'tool' is not a response to a preceding messa…

[NetchiHub]

Fix for OpenAI API Tool Message Error

Changes

Added modifications to handle tool messages in the add_message and add_messages methods of the Memory class in schema.py.

Specifically, when the number of messages exceeds max_messages, we now remove any leading messages with role="tool".

Background

When using the OpenAI API, the following error was occurring:
ERROR | app.llm:ask_tool:768 - API error: Error code: 400 - {'error': {'message': "Messages with role 'tool' must be a response to a preceding message with 'tool_calls'", 'type': 'invalid_request_error', 'param': None, 'code': 'invalid_request_error'}}

This error occurs when a message with role="tool" is not preceded by a message containing tool_calls.

Solution

When the message history exceeds max_messages, we now remove any leading messages with role="tool". This prevents tool messages from being sent without the proper context.

Impact

This fix only affects message history management when using the OpenAI API. It has no impact on other functionality.

Testing

• Verified behavior when message count exceeds max_messages
• Confirmed proper handling of tool messages
• Verified successful processing of OpenAI API requests