import type { TurnResult, StuckEvaluation } from "../types/agent.js";
/**
 * Stateful detector that tracks patterns across harness turns and identifies
 * when the agent is stuck in a loop.
 *
 * Uses a two-strike system: first detection of a pattern triggers an intervention
 * (the harness injects a diagnostic prompt). If the same pattern is detected again,
 * the harness gives up and terminates.
 */
export declare class StuckDetector {
    private toolCallHistory;
    private responseHistory;
    private errorHistory;
    private emptyTurnCount;
    private interventions;
    /**
     * Evaluate a completed turn for stuck patterns.
     * Checks patterns in priority order: repeating tools → repeating responses →
     * error loop → empty turns.
     */
    evaluate(turn: TurnResult): StuckEvaluation;
    /**
     * Two-strike system: first occurrence triggers intervention, second gives up.
     */
    private strike;
    /** Reset all state (for fresh runs). */
    reset(): void;
    /** Replay existing turn results to rebuild state (for resume scenarios). */
    initializeFromHistory(turnResults: TurnResult[]): void;
}