export interface WorkflowLogger {
    log(message: string): void;
    error(message: string): void;
    warn(message: string): void;
    info(message: string): void;
    debug(message: string): void;
}
export interface WorkflowSpan {
    setAttribute(key: string, value: unknown): void;
    setAttributes(attributes: Record<string, unknown>): void;
    addEvent(name: string, attributes?: Record<string, unknown>): void;
    setStatus(status: {
        code: 'OK' | 'ERROR' | 'UNSET';
        message?: string;
    }): void;
    end(): void;
}
export interface WorkflowTracer {
    startSpan(name: string, options?: {
        attributes?: Record<string, unknown>;
        parent?: WorkflowSpan;
    }): WorkflowSpan;
    getCurrentSpan(): WorkflowSpan | undefined;
}
export interface ValidationResult {
    valid: boolean;
    error?: string;
    data?: unknown;
}
export interface WorkflowValidator {
    (value: unknown, schema: unknown): ValidationResult;
}
export interface WorkflowEngineConfig {
    defaultTaskTimeoutMs: number;
    validate: WorkflowValidator;
    logger?: WorkflowLogger;
    tracer?: WorkflowTracer;
    retryPolicy: {
        maxAttempts: number;
        backoffMs?: number;
    };
}
export declare function configureWorkflowEngine(config: Partial<WorkflowEngineConfig>): void;
export declare function getWorkflowEngineConfig(): WorkflowEngineConfig;