I didn't update it for a while. It reads your local conversation history, correlate input/output token with usage (claude doesn't give exact breakdown), and classify if they are subagent/tooluse/normal message/whatever. Let me know if I can make it any way useful to you.

https://github.com/kmcheung12/ccaudit

Thanks, this looks useful. The subagent and tool-use breakdown is exactly the kind of visibility I was looking for. I will give it a try.