hi, while testing irssi 1.4, i found out there was a wip plugin for matrix, (https://codeberg.org/ticho/irssi-matrix) so might aswell port it (and its dep, a maintained fork of matrix-glib by the same upstream) - its mentioned on the irssi relnotes at https://irssi.org/2022/06/12/irssi-1.4.1-released/
i havent tested it, upstream has zero doc on how to configure it, but irssi manages to load the plugin: 11:47 -!- Irssi: Loaded module matrix/core 11:47 -!- Irssi: Loaded module matrix/fe-common just in case, for irssi hardcore users.. Landry
irssi-matrix.tgz
Description: application/tar-gz