import type { SessionOpts } from '../types/run-result.js';
export interface BusLike {
    emitPlainEntry(entry: unknown): void;
}
export declare function busOf(opts: SessionOpts): BusLike | undefined;
/**
 * How long a turn's wall-clock guard should wait before firing, or `null` when the budget is
 * genuinely unbounded and no guard should be armed.
 *
 * Both runners computed this inline, identically, and so shared one bug: they floored the
 * remaining time at 0 and then armed the timer only for `> 0`, which made an ELAPSED deadline
 * take the same path as "no deadline configured" and left the turn running unbounded. That is
 * reachable — `runTwoPhasePipeline` computes ONE deadline for the whole run and gives it to
 * both sessions, so an implementer that spends the entire budget hands the reviewer an elapsed
 * one, and the reviewer becomes the only unbounded stage of an already-late run.
 *
 * `0` and `null` are the distinction the inline version collapsed: 0 means "no time left, stop
 * now", null means "no limit was set". Only a non-finite deadline yields null.
 */
export declare function wallClockDelayMs(deadline: number, now?: number): number | null;
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