For udev I had to use these rules provided by this AUR package on Arch Linux.
I’m not sure which exact device/lines from that udev rules file is required, but the quickstart rules didn’t do it for me.
I’m not using the studio nor the SDK atm, but Rust directly with JLink provided by said package and objdump from SiFive’s toolchain. Currently I got serial, build-in LEDs and timer interrupts working fine.