import type { WorkflowIR } from './ir';
/** Validation failure for the unified workflow representation. */
export declare class WorkflowValidationError extends Error {
    readonly workflowId: string;
    constructor(message: string, workflowId: string);
}
/** Validate node identity, references, entry, DAG shape, and branch fallbacks. */
export declare function validateWorkflowIR(ir: WorkflowIR): void;
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