Stdlib Lisp editor.

Type any expression, or load a tiny example. Iteration 02 keeps the core seven visible while adding the first portable standard-library layer: lambda, define, defn, let, do, list, and arithmetic.

Iteration 2 is where tiny programs become reusable: define names, write functions, bind local values, group steps with do, build lists directly, and calculate with +, -, *, and /.