[Bug] Auto-Compact consumes excessive session usage quota

Bug Description
hello why my usage is cut while i am compacting my session, i knwo compacting causes usage but compacting costed me 32% of my current session limit, isn't it a bug please check this out i can also share screenshot and necessary inforamtion, just started a new session and claude costed me 30 i am using cli and i only ran just compact my current session usage was at 0% this is seriously wrong and i am not going to tolerate this

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.1.216
• Feedback ID: a12f15e5-ab01-43cc-9166-373aa2aba723

Errors

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