/**
 * classifyError — pure function mapping a thrown error to one of the
 * coarse `ReliabilityScope.errorKind` categories used by reliability rules.
 *
 * Centralized so rules read structured `errorKind` instead of doing
 * regex on `error.message` themselves. Add new categories ONLY when a
 * new rule needs to discriminate them — keep the taxonomy small.
 *
 * Categories:
 *   • 'ok'             — no error (caller should pass `undefined` or omit)
 *   • 'circuit-open'   — `CircuitOpenError` from the breaker layer
 *   • 'rate-limit'     — HTTP 429 or vendor rate-limit signal
 *   • '5xx-transient'  — HTTP 5xx, ETIMEDOUT, ECONNRESET, ECONNREFUSED
 *   • 'schema-fail'    — `OutputSchemaError` from the schema validator
 *   • 'unknown'        — anything else (default; still routable but
 *                        consumers usually `'fail-fast'` on this)
 */
import type { ReliabilityScope } from './types.js';
type ErrorKind = ReliabilityScope['errorKind'];
/**
 * Classify an error into a `ReliabilityScope['errorKind']` category.
 *
 * @param err - The thrown value. May be an Error, a vendor SDK error
 *   shape with `.status`/`.code`, or anything else (`unknown` defaults).
 * @returns the matching coarse category string.
 */
export declare function classifyError(err: unknown): ErrorKind;
export {};