/**
 * [WHO]: LoopProgressTracker and deterministic tool evidence fingerprints
 * [FROM]: No external dependencies
 * [TO]: Consumed by agent loops when progress-aware stopping is enabled
 * [HERE]: core/lib/agent-core/src/loop-progress.ts - bounded livelock detection primitive
 */
export interface LoopProgressOptions {
    repetitionThreshold: number;
    historySize?: number;
}
export interface LoopProgressEvidence {
    toolName: string;
    input: unknown;
    outcome: "success" | "error" | "denied";
    output?: unknown;
    progressMarker?: string;
}
export interface LivelockDetection {
    fingerprint: string;
    repeatCount: number;
}
export declare function fingerprintProgressEvidence(evidence: LoopProgressEvidence): string;
export declare class LoopProgressTracker {
    #private;
    stagnationCount: number;
    constructor(options: LoopProgressOptions);
    reset(): void;
    observe(evidence: LoopProgressEvidence): LivelockDetection | undefined;
}