Please give an example because I have an ambiguous understanding of your question

Ex: Script is at /home/dir/project/script.clj I launch it from cmd while i'm in /home/dir and return /home/dir/project/. I call it from /tmp and I get /home/dir/project/

You can do this by using *file*:

(ns script)

(require '[babashka.fs :as fs])
(def script-file *file*)
(def script-dir (str (fs/parent script-file)))

you must execute this on the top level like in the above example, it does not work in function bodies, since *file* isn't bound anymore

Thanks!