I've just published draft #3 of SRFI 143.  It was submitted by John Cowan, author of the SRFI.

<https://srfi.schemers.org/srfi-143/>

Here's the diff:

<https://github.com/scheme-requests-for-implementation/srfi-143/commit/e3508275e128da6ad35e7da09b140fdf87c7d2f4>

Regards,

SRFI Editor