import type { Severity } from "./contracts.js";
export declare const SCHEMA_VERSION = "1.0.0";
export declare function nowIso(): string;
export declare function randomId(prefix: string): string;
export declare function clamp(value: number, min?: number, max?: number): number;
export declare function normalizeSeverity(score: number): Severity;
export declare function dedupe<T>(values: T[]): T[];
export declare function safeArray<T>(value: T[] | undefined | null): T[];
export declare function safeNumber(value: unknown, fallback?: number): number;
export declare function haversineDistanceKm(lat1: number, lon1: number, lat2: number, lon2: number): number;
/**
 * Sanitize a string to prevent XSS and injection. Strips control characters and
 * truncates to a safe length.
 */
export declare function sanitizeString(value: unknown, maxLength?: number): string;
/**
 * Validate that an ID matches the expected ADBIS identifier format.
 * Prevents path-traversal and injection through route params.
 */
export declare function isValidId(id: unknown): boolean;
/**
 * Deep-scan an object and strip prototype-pollution keys (__proto__, constructor, prototype).
 * Returns a clean copy. Operates recursively with depth limit to prevent stack overflow.
 */
export declare function stripPoisonedKeys(obj: unknown, depth?: number): unknown;
/**
 * Safe JSON parse that rejects prototype pollution payloads.
 * Returns null on parse failure instead of throwing.
 */
export declare function safeJsonParse<T = unknown>(raw: string): T | null;
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