Guile

This mode is built in lem, there is the basic command of start-scheme-repl that launches a basic REPL interaction.

For a more advance development experience, I highly recommend using the r7rs-swank library.

Here is a configuration example:

(defvar *swank-port* 4015)

(setf lem-scheme-mode::*default-port* *swank-port*
      lem-scheme-mode:*use-scheme-autodoc* :auto
      lem-scheme-mode:*scheme-swank-server-run-command* 
      `("guile" "--r7rs"
        "-l" ".lem/CUSTOM-PATH/r7rs-swank/guile-swank.scm" 
        "-c" 
        ,(format nil "(import (guile-swank)) (start-swank ~a)" 
                *swank-port*))
      lem-scheme-mode:*use-scheme-repl-shortcut* t ) 

The idea is to load the scheme file “guile-swank.scm”, so that the swank server start, for now, the path is concatenated from where the buffer is located, so I recommed to just launch the repl in the tmp buffer.

Launch an interactive REPL with the command scheme-slime, this will start the REPL.