I've just published draft #2 of SRFI 154.  It was submitted
by Marc Nieper-Wißkirchen, author of the SRFI.

  <https://srfi.schemers.org/srfi-154/>

Here are Marc's comments on the draft:

  - Changed terminology from "dynamic environment" to
    "dynamic extent" to be in line with the R7RS

  - Accordingly, changed the title of this SRFI to
    "First-class dynamic extents"

  - Added efficient implementation for Chibi Scheme

  - Explain example better

  - Add link to SRFI 155

  - Chibi implementation fixed.

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-154/compare/be305df3096a52488676142399ef2559fcac2498...e63881aa7fd8b6140194823792e6858dbdded962>

Regards,

SRFI Editor