/**
 * Deterministic PRNG + sampling primitives backing the CEL `randomSample`
 * function.
 *
 * STABILITY CONTRACT — DO NOT CHANGE THESE ALGORITHMS.
 * The same seed must produce the same sample on every runtime and every SDK
 * version: the backend (server) and frontend (client) rely on agreeing outputs,
 * and customers rely on seeds for reproducible workflow runs. Golden-value
 * tests in tests/lib/cel/prng.test.ts pin the exact outputs.
 */
/** A source of random floats in [0, 1). */
export type RandomSource = () => number;
/**
 * mulberry32: fast 32-bit PRNG with exact, platform-independent output.
 * `seed` is coerced to uint32 (via `>>> 0`); use {@link normalizeSeed} to
 * convert arbitrary CEL ints before calling this.
 */
export declare function mulberry32(seed: number): RandomSource;
/** Normalize a CEL int (bigint or number) to a uint32 PRNG seed. */
export declare function normalizeSeed(seed: bigint | number): number;
/**
 * Sample `count` distinct elements via partial Fisher–Yates.
 * `count` is clamped to [0, list.length]; the input list is not mutated.
 */
export declare function sampleWithoutReplacement<T>(list: readonly T[], count: number, rand: RandomSource): T[];
/** `count` independent draws; duplicates allowed. Returns [] if the list is empty or count <= 0. */
export declare function sampleWithReplacement<T>(list: readonly T[], count: number, rand: RandomSource): T[];
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