import type { WorkflowDefinition } from './workflow.js';
/** A single validation error or warning */
export interface ValidationIssue {
    message: string;
    /** Dot-path to the problematic element (e.g., "phases[0].steps[1]") */
    path?: string;
}
/** Result of validating a workflow definition */
export interface WorkflowValidationResult {
    valid: boolean;
    errors: ValidationIssue[];
    warnings: ValidationIssue[];
}
/**
 * Validate a parsed WorkflowDefinition for structural issues.
 * Does NOT re-validate YAML parsing — assumes parseWorkflow() already succeeded.
 */
export declare function validateWorkflow(def: WorkflowDefinition): WorkflowValidationResult;
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