extratone/obd — reverse-engineered prompt

Build me a simple JavaScript tool for car diagnostics data, mainly for OBDeleven style raw text exports. I want to be able to drop one or more text files into an input folder, using names like brand and model, then run one command and get Excel files in an output folder.

The Excel output should be easy for a normal person to review. Each raw log line should become a row, important details should go into clear columns, and any extra long leftover data should still be preserved in separate columns so nothing gets lost. If it makes sense, organize the workbook so there is one area for basic car info and another for diagnostic data.

Please use the sample files and existing folders in the repo as clues for the expected format and categories. Make it safe to rerun, handle overwriting in a sensible way, and keep setup straightforward for someone with Node installed. If anything is unclear, look up current docs online and fill in the missing pieces in the most practical way.