claude-code - 💡(How to fix) Fix [BUG] Status line cost counter resets on context compaction — undercounts session cost [1 comments, 2 participants]

• Before compaction: Status line showed ~$5-6 (roughly correct for 77 turns up to 164k context)
• After compaction: Status line showed ~$4.97 total (approximately post-compaction cost only)
• Actual total from JSONL: $8.35 (calculated from full transcript with correct Opus 4.6 pricing)

TL;DR

The cost displayed in the Claude Code status line can be made cumulative across the entire session by modifying the cost tracking logic to account for pre-compaction spend.

Guidance

• Review the cost calculation logic to ensure it accumulates costs across compaction events, rather than resetting.
• Verify that the JSONL transcript contains all turns, including pre-compaction ones, to use as a reference for correct total cost.
• Consider modifying the status line update logic to read from the JSONL transcript or a similar cumulative cost tracker.
• Check if the compaction event is properly handled in the cost tracking logic, ensuring that pre-compaction costs are not lost.

Example

No code snippet is provided due to lack of specific implementation details in the issue.

Notes

The provided information suggests a logic issue in the cost tracking mechanism, but the exact implementation details are not available. The solution may involve modifying the existing cost tracking logic or introducing a new cumulative cost tracker.

Recommendation

Apply a workaround by modifying the cost tracking logic to accumulate costs across compaction events, as the root cause appears to be a logic issue rather than a version-specific problem.