Also, packaged jarchive, it allows to open files inside jars using special file path like:
(find-file "~/dl/hiccup-1.0.5.jar::/hiccup/page.clj")
https://git.sr.ht/~abcdw/rde/commit/73c1faa227b9eb3cb4f01c5f04529bd2d1e54dc3
And now eglot+lsp-clojure have working goto definition for clojure code even if it comes from jars.