Smelter

Lisp Scripts That Just Work

Coalton or Common Lisp. No SBCL. No Quicklisp. Just run.

brew tap abacusnoir/smelter && brew install smelter

curl -fsSL https://github.com/abacusnoir/smelter/releases/latest/download/install.sh | bash

⚡ Zero Setup

No SBCL install. No Quicklisp config. One command and you're running Lisp.

🎯 Two Modes

Coalton for type-safe scripts. Common Lisp for everything else. Same binary.

🚀 Batteries Included

Ships with JSON, HTTP, filesystem, and process utilities. Real scripting, not a toy.

Quick Start

Coalton (type-safe)

#!/usr/bin/env smt run

(declare fibonacci (Integer -> Integer))
(define (fibonacci n)
  (match n
    (0 0)
    (1 1)
    (n (+ (fibonacci (- n 1))
          (fibonacci (- n 2))))))

(define main
  (println (show (fibonacci 10))))

Common Lisp

#!/usr/bin/env smt-cl

(defun fibonacci (n)
  (if (<= n 1)
      n
      (+ (fibonacci (- n 1))
         (fibonacci (- n 2)))))

(format t "~A~%" (fibonacci 10))

Try Coalton Online Examples GitHub

CL mode runs locally. Coalton can be prototyped at coalton.app