MarsSeed [1] filed a deletion request for knemo [2]: Broken KDE5 package. Not worth keeping.
Upstream discontinued since 2019. [a] It depends on kdelibs4support, which is EOL and won't work on KDE Plasma 6, coming in a few months. There are alternatives for the use case it served. [a]: https://github.com/KDE/knemo/tree/frameworks [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/knemo/
