A tiny Node.js library that implements the three combinators S, K and I from the SKI combinatory calculus, exposing them as plain JavaScript functions. It lets developers write and experiment with functional‐programming concepts (e.g., constant, identity, and substitution combinators) in any JavaScript environment, either by loading the whole module or by requiring individual combinators. Ideal for learners, educators, and functional‑programming hobbyists who want a simple, public‑domain implementation of SKI calculus in Node.