sequilade/tokentab ? reverse-engineered prompt

Build me a small Python tool called tokentab that reads the session logs Claude Code, Codex, Cursor, and Gemini CLI already save on my machine, and tells me how much those sessions cost. I want it to work completely locally, with no login, no API keys, and nothing sent anywhere.

When I run it in the terminal, it should show totals for the last 7 days by default, and let me filter by today, this month, a custom date range, one provider, or one project. I also want JSON output for piping into other tools.

Please add a simple local web view too, so I can open the same data in a browser with a clean dashboard and charts. It should read the log files directly each time, and stay on localhost only.

Use the token counts from the logs, calculate pricing from a built in table, and handle unknown models gracefully by showing that they need to be added. If you need current details, look up the latest docs online.