The **error‑if‑array‑too‑short‑to‑meet‑adjacent‑items‑request** package exports a single utility function that validates whether an array contains enough elements to return a given number of adjacent items starting at a specified index (which may be positive or negative). If the request cannot be satisfied, it throws an informative error. This lightweight, zero‑dependency module is aimed at JavaScript/TypeScript developers who need a simple runtime guard for safe array slicing or neighbor‑lookup logic.