Points history at ~/.qunitx_repl_history, honouring QUNITX_REPL_HISTORY (an empty value turns it off). Only in a terminal — setupHistory is a no-op without one, and a scripted invocation has no business writing to a history file.

import { setupHistory } from './history.ts';

import type { REPLServer } from 'node:repl';

// Defined, not invoked: it opens a file in the developer's home directory.
function example(server: REPLServer) {
  setupHistory(server, false); // a pipe keeps no history
}