openclaw - 💡(How to fix) Fix [Bug] transcript repair inserts 'missing tool result' after LCM compaction [1 comments, 2 participants]

Summary: After LCM (Lossless Context Management) compaction, the session transcript repair logic inserts synthetic error messages: [openclaw] missing tool result in session history; inserted synthetic error result for transcript repair.

• When a tool call exists in an assistant message but its corresponding tool result has been compacted away, the repair logic inserts a synthetic error

1. Transcript repair sees orphan tool calls → inserts error messages Option A: In transcript repair, detect if tool result was compacted (check LCM summaries) instead of inserting error Option C: Add config option to disable synthetic error insertion (missingToolResultText: null) Impact: Cosmetic but confusing - execution succeeds but UI shows error messages

TL;DR

Increase recentTurnsPreserve to 25+ and set mode to "safeguard" as a temporary workaround to reduce synthetic error messages.

Guidance

• Review the session-transcript-repair-D9T_omS-.js file, specifically the repairToolUseResultPairing function, to understand how synthetic error messages are inserted.
• Consider implementing one of the suggested fixes: detecting compacted tool results, preserving tool result/tool call pairs, or adding a config option to disable synthetic error insertion.
• Verify the effectiveness of any changes by testing with long sessions (100+ messages) and many tool calls.
• Monitor the impact of increased recentTurnsPreserve values on performance and adjust as needed.

Example

No code snippet is provided as the issue does not contain sufficient code details.

Notes

The provided workaround is config-level and may not be a permanent solution. The suggested fixes require further implementation and testing.

Recommendation

Apply the workaround by increasing recentTurnsPreserve to 25+ and setting mode to "safeguard", as it is a relatively safe and easy change to implement while a more permanent solution is developed.