export interface WorkflowStep {
    id: string;
    type: 'tool' | 'llm' | 'condition';
    tool?: string;
    input?: Record<string, any>;
    prompt?: string;
    condition?: string;
    onTrue?: string;
    onFalse?: string;
    output?: string;
}
export interface WorkflowDefinition {
    name: string;
    description?: string;
    steps: WorkflowStep[];
    errorHandling?: 'stop' | 'skip' | 'retry';
}
export interface WorkflowState {
    workflowName: string;
    currentStepId: string;
    variables: Record<string, any>;
    status: 'running' | 'completed' | 'failed' | 'paused';
    startedAt: number;
    completedAt?: number;
    error?: string;
}
export declare class WorkflowEngine {
    private state;
    private _paused;
    private _definition;
    private _resumeIndex;
    execute(definition: WorkflowDefinition, initialVars?: Record<string, any>): Promise<WorkflowState>;
    private _run;
    private executeStep;
    private evaluateCondition;
    private resolveVariables;
    getState(): WorkflowState | null;
    pause(): void;
    resume(): Promise<WorkflowState>;
}
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