Think there might be an error related to macros and Joker types:
13:55:29 ~ > joker
Welcome to joker v0.14.1. Use EOF (Ctrl-D) or SIGINT (Ctrl-C) to exit.
user=> (defmacro try-log [ & body ] `(try ~@body (catch Error t# (println t#))))
#'user/try-log
user=> (try-log (throw (ex-info "Oouch" {})))
<repl>:1:50: Parse error: Unable to resolve symbol: user/Error
user=>
Request: joker.os/uuid
to return a UUID string.