The SRFI is (near) finalization, see the sample implementation at:

  https://github.com/ashinn/chibi-scheme/pull/587

You can run tests with the following commands:

  git clone https://github.com/amirouche/chibi-scheme/
  cd chibi
  git checkout srfi-168
  make
  make test-libs

The above will run all chibi tests including srfi-167 (in-memory),
srfi-168 and srfi-173.

Ideas about more tests more than welcome.

Best regards,

Amirouche