/**
 * Capture Agent — Circuit Breaker
 *
 * Three-level circuit breaker to prevent infinite recovery loops:
 * - Per-opcode: max failures before the opcode is abandoned
 * - Per-page: max failures across all opcodes on the same page
 * - Per-run: max total failures across the entire program
 */
import type { CircuitBreakerConfig } from './execution-types.js';
export type BreakerTrip = 'opcode' | 'page' | 'run';
export interface BreakerState {
    tripped: boolean;
    level?: BreakerTrip;
    reason: string;
    opcodeFailures: number;
    pageFailures: number;
    runFailures: number;
}
export declare class CircuitBreaker {
    private config;
    private opcodeFailures;
    private pageFailures;
    private runFailures;
    private currentPageKey;
    constructor(config?: CircuitBreakerConfig);
    /** Set the current page context (URL-based key) */
    setPage(url: string): void;
    /** Record a failure for an opcode. Returns breaker state. */
    recordFailure(opcodeIndex: number, maxPerOpcode?: number): BreakerState;
    /** Record a success for an opcode (resets opcode-level counter) */
    recordSuccess(opcodeIndex: number): void;
    /** Check if the breaker is currently tripped at any level */
    isTripped(): BreakerState;
    /** Get summary of all failure counts */
    getSummary(): {
        opcodeFailures: Record<number, number>;
        pageFailures: Record<string, number>;
        runFailures: number;
    };
    /** Reset all counters */
    reset(): void;
}