/** Trusted numeric codec: nullish options mean omitted; only positive safe
 * integers reach an override input. Other invalid values must be refused. */
export declare const hostOutputCeiling: (requested: number | null | undefined, fallback: number, label: string) => number;
/** Callback identity is host-owned. No guest argument can enable pausing, and
 * an explicit whole-script deadline always withholds the capability. */
export declare const providerHumanWait: <T>(callback: T | undefined, hardTimeoutMs: number | undefined) => T | undefined;
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