import type { BusyEntry } from "../runtime/waits.js";
/** An open wait as the UI holds it: the entry and the UI's clock
 *  reading when the wait began. */
export type BusyShown = {
    entry: BusyEntry;
    since: number;
};
/** The list to hold after the run sent `entries`: an entry already held,
 *  by its token, keeps its time; a new one began `elapsedMs` before
 *  `now`, so a UI that joins late shows the wait's whole length; one
 *  that is gone is dropped. A pure function of its inputs, so the order
 *  the notices arrive in is the only order there is. */
export declare function withSince(previous: BusyShown[], entries: BusyEntry[], now: number): BusyShown[];
/** A duration as the screen shows it: `4m10s`, `30s`, `250ms`. */
export declare function formatElapsed(ms: number): string;
/** The wait as one line: where the `llm()` statement is, how long the
 *  wait has been open, and what the loop is doing there. `line` is the
 *  statement's source line when the UI knows it. */
export declare function busyText(shown: BusyShown, line: number | undefined, now: number): string;