Dumpall

List all ids registered.

Command /dumpall to run, dump to <installation folder>/dumpall directory. Output files are tsv format, they have only single column; as just resource locations/identifiers lists.

Each files located as registry ids, for example items is dumped in <installation folder>/dumpall/minecraft/item.tsv.

I guess this mod could help to make datapacks or modpacks. The output files of this mod are simple tsv, you can process these outputs into what useable you working on.