I would need more details on what you mean by "pre-parsing". It works with any deliminator, it could be comma-separated, pipe-separated, etc.

Doesn't need to be pre-parsed. Perhaps give the filename to the utility instead of content via stdin. Then filename gives a hint. If there is none, run "file filename" (via library) beforehand.

I actually like `tidy` better and honestly would rather have `cat a.csv | tidy ...`. But it's probably already a thing.

You don't have to make the alias `tv`. Feel free to make your alias tidy='tidy-viewer'.

Nice idea. I might actually work on this myself