import type { SpecDiagram, Spec } from '../types/index.js';
/**
 * Generate a class diagram for types/interfaces structure.
 */
export declare function generateClassDiagram(spec: Spec): SpecDiagram;
/**
 * Generate a Gantt chart for implementation timeline.
 */
export declare function generateGanttDiagram(spec: Spec): SpecDiagram;
/**
 * Generate a pie chart for effort distribution (dev vs review hours).
 */
export declare function generatePieDiagram(spec: Spec): SpecDiagram;
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