YueGuobin 9b85417a82 fix(copilot): serialize tool output to JSON in ToolMessage for history ...

Fixed tool output serialization in tool_node function to ensure
ToolMessage.content is always in JSON format, not Python str() representation.

This fixes the issue where conversation history showed tool outputs
with single quotes (Python format) instead of standard JSON.

Changes:
- Added json import to gns3_copilot.py
- Modified tool_node() to serialize observation to JSON before creating ToolMessage
- Ensures both SSE streaming and history storage use consistent JSON format

Root cause: ToolMessage was created with raw dict/list objects, which
LangChain converted to Python str() representation when saving to history.

Co-Authored-By: YueGuobin <yueguobin@outlook.com>

2026-03-09 15:50:36 +08:00

..

gns3_copilot

fix(copilot): serialize tool output to JSON in ToolMessage for history

2026-03-09 15:50:36 +08:00