import type { ValidationResult } from '../../model/component-types.js';
import type { ScenarioModel } from '../../model/scenario-model.js';
/**
 * Checks the event graph for structural issues:
 * - Error: No component with trigger=EventStart
 * - Warning: Unreachable events (no incoming refs and no trigger)
 * - Warning: Dead-end events (no next-event refs and no $end operation)
 */
export declare function checkEventGraph(model: ScenarioModel): ValidationResult[];
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