/**
 * Tracker contract — workflows record actions for dedup, stats, and history.
 * Core provides a default implementation; plugins use it via WorkflowStepContext.
 */
export interface TrackedAction {
    workflow: string;
    action: string;
    key: string;
    metadata: Record<string, unknown>;
    costUsd: number;
    createdAt: string;
}
export interface WorkflowStats {
    totalRuns: number;
    totalActions: number;
    totalCostUsd: number;
    todayActions: number;
    todayCostUsd: number;
    lastRun?: string;
    byAction: Record<string, number>;
}
export interface WorkflowTracker {
    trackAction(action: string, key: string, metadata: Record<string, unknown>, costUsd?: number): void;
    isDuplicate(key: string): boolean;
    getStats(): WorkflowStats;
    getByAction(action: string): TrackedAction[];
}