import type { ConditionOperator } from '../types/validated/step-definition';
export interface Clock {
    now: Date;
    timezone: string;
}
/**
 * Pure evaluation of one deterministic condition. Never throws for data reasons:
 * - `null` = not evaluable (the resolved value is null/missing) — treated as "not met";
 * - a type-mismatched comparison (including for negated operators) is "not met" (`false`),
 *   so a broken config can never accidentally satisfy a condition.
 */
export default function evaluateOperator(operator: ConditionOperator, actual: unknown, expected: unknown, clock: Clock): boolean | null;
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