I'm happy to report I'm back to scheming.

As noted in the Implementation section, neither scsh nor my Chibi Scheme implement the optional argument buffer-mode for fdes->[textual|binary]-[input|output]-port.

While it's important, for example in logging so outputs of lines are atomic, I'm not inclined to add it to Chibi Scheme at this time since it's not particularly a POSIX per se thing, but an implementation detail that ought to be easy enough for someone familiar with low level port code.  I didn't need to get into that depth to support everything else port related in the SRFI.

I've got my fork on GitHub up-to-date and am fixing minor issues, the only major task in addition to thorough proofreading and perhaps some cleanup of my Chibi Scheme implementation is making that implementation stand alone instead of a branch of the whole Chibi Scheme repo, something I learned how to do after starting it way back when, and updating all the collateral information to reflect that. 

- Harold