This terminal runs the actual zincvm C VM compiled to WebAssembly — the same interpreter that ships in the repo, booting the ~295-closure globals.csexp bundle. Type KLambda expressions and hit Enter:
(+ 1 2) → 3 (cons 1 2) → [1 . 2] (= [+ 1 2] [+ 1 2]) → true (hd [1 2 3]) → 1 (tl [1 2 3]) → [2 3] (reverse [1 2 3]) → [3 2 1]
The playground evaluates primitive calls through the metacircular interpreter. The repo's open close-the-loop item — defun registration and non-bundled closures — is not yet functional in the reduced bundle, so (defun ...) forms report an honest registration result.
The collector under wasm swaps the native 4 GB mmap reservation for an aligned_alloc heap, and the input/output bridge is a synchronous shen_eval_line entrypoint — no blocking fgetc(stdin), no web worker.