>> - Rewrite `maybe-read-number` so it doesn't rely on regular expressions
>> and `string->number`. This would remove the dependency on (chibi regexp)
>> making it easier to port SRFI 180 to other R7RS Schemes.
>
> chibi regexp is scheme regex (https://srfi.schemers.org/srfi-115/). I will put
> that inside a cond-expand with a nop if it is not available.

Sure.

> I will incorporate the changes in the next draft due later today or tomorrow.
> Like I wrote in the other thread, I already changed some stuff and those changes
> will end in a merge conflict I guess.

Whatever works is fine. Thanks for the fast work on the implementation!