import type { CompactionLevel } from '../../domain/compaction/compaction-level.js';
import type { ContextBudget } from '../../domain/compaction/context-budget.js';
interface ShapeMetrics {
    readonly duplicateRetrievalCount?: number;
    readonly repeatedRestatementCount?: number;
    readonly lowImportanceEventCount?: number;
    readonly recursiveDepth?: number;
    readonly narrativeOutputRatio?: number;
}
interface TriggerResult {
    readonly level: CompactionLevel;
    readonly reasons: string[];
}
export declare class TriggerEngine {
    private _running;
    evaluate(budget: ContextBudget, metrics: ShapeMetrics, completedEventType?: string): Promise<TriggerResult | null>;
    setRunning(value: boolean): void;
}
export {};
//# sourceMappingURL=trigger-engine.d.ts.map