Stephan works on the third part project potluck
(https://github.com/bsdpot/potluck) and has reported about pot and potluck in the FreeBSD Status reports.
His first authored commit is in the doc repository:
eb2e55d843695eb0c5b4d3f289a72f6b07543581
But he had already contributed with status reports before, to the now
archived https://github.com/freebsd/freebsd-quarterly repository.