This tool is made to link all Bahá'í prayers together across all languages using the code from Phelps' catalog or a derivative of this when the prayer is a subpart of a work from the catalog.
Just compile and run the tool with a rel/ directory containing code.list and lang.csv. The tool will update the code.list while you are working. To help the project, pick languages you can match, try to find the right prayer using keyword search, and when done send your updated code.list to the project so it can be merged in.
To avoid confusion, the latest rel/ directory can be found in the bahaiprayers-static github repository. It has been retired from this repository. You can run the phelpsify tool on the rel/ directory there.