Maybe Discord can be a starting point, and documentation can be written later.

One way to think about documentation is that it is useful to help scale up support. But if there is no scale, it is less important.

That doesn’t seem very unix philosophy to me

The Unix philosophy has nothing to do with documentation lol. It is actually the exact opposite of your know it all hypothetical "no reason to play fast and loose when you can just do the job right" fantasy :

"Design and build software, even operating systems, to be tried early, ideally within weeks. Don't hesitate to throw away the clumsy parts and rebuild them."

If anything, it is a lot closer to move fast and break things.