If you're on Emacs you can set each clj-refactor.el defcustom in .dir-locals.el Otherwise as the doc says, Configuration settings are passed along with each msg i.e. they're up to the caller to pass with each invocation You can also rebind these dyn vars if you find so more convenient: https://github.com/clojure-emacs/refactor-nrepl/blob/c2f629d82879e12c8976c23b68008bacce72a68b/src/refactor_nrepl/config.clj#L4

Thank you @U45T93RA6 will try both

Given these are custom settings on my end probably the defcustoms are the best approach