openclaw - 💡(How to fix) Fix [Bug]: Long sessions (600+ messages) break with "invalid function call parameters" [1 comments, 1 participants]

TL;DR

The issue can likely be resolved by addressing the serialization of historical toolCall/toolResult pairs in the context engine plugin, potentially by implementing a mechanism to clean up or validate the accumulated message history.

Guidance

• Investigate the custom context engine plugin's serialization pipeline to identify potential issues with old tool call entries becoming malformed, such as missing matching toolResults or arguments fields that don't round-trip cleanly.
• Verify that the ownsCompaction: true setting in the custom context engine plugin is correctly handling the compaction of the message history.
• Test the API with a smaller number of messages to see if the issue still occurs, and if not, gradually increase the number of messages to identify the threshold at which the issue starts to happen.
• Consider implementing a temporary workaround, such as periodically clearing or resetting the accumulated message history, to mitigate the issue until a permanent fix can be implemented.

Example

No specific code snippet can be provided without more information about the custom context engine plugin's implementation.

Notes

The root cause of the issue is likely related to the serialization of historical toolCall/toolResult pairs, but the exact cause and solution may depend on the specific implementation of the custom context engine plugin.

Recommendation

Apply a workaround, such as periodically clearing or resetting the accumulated message history, to mitigate the issue until a permanent fix can be implemented, as the root cause is likely related to the custom context engine plugin's serialization pipeline.