import { CandidateHealthStore } from "./candidate-health-store.js";
import type { HealthTransition } from "./health-store.js";
import type { FailureClassification, RouterOrderingToken } from "./types.js";
export declare class CandidateHealthTransitions extends CandidateHealthStore {
    failure(index: number, classification: FailureClassification, healthKey?: string, family?: string, attemptStartedAt?: RouterOrderingToken): HealthTransition;
    success(index: number, healthKey?: string, family?: string, attemptStartedAt?: RouterOrderingToken): HealthTransition | undefined;
    unavailableSince(index: number, selectedAt: RouterOrderingToken, healthKey?: string, family?: string): boolean;
}