There is a whole family of codes named ‘sct’.
A very lightweight one was discussed here in 2024 (https://forum.qubes-os.org/t/study-this-38-and-85-lines-of-sctd-sh-and-sct-c-to-see-if-it-is-or-make-it-safe-to-be-used-in-dom0-a-solution-to-the-much-code-redshift-used-by-many-qubes-users/28175)
There seem to be several more on GitHub.
I have not tested any of them, but the one above looks harmless… (although I am not an expert, and am not to be trusted!)