/**
 * Deterministic seeded PRNG (mulberry32) for reproducible scenario behavior.
 */
export declare const createSeededRng: (seed: number) => (() => number);
/** Derive a numeric seed from a string (scenario id / session id). */
export declare const hashSeed: (input: string) => number;
export declare const resolveSeed: (seed: number | string | undefined, fallback: string) => number;
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