/**
 * Flowchart Parser
 *
 * Parses Mermaid flowchart syntax into an AST using the vendored JISON parser.
 * The JISON parser calls methods on a `yy` object - we provide our own implementation
 * that builds an AST instead of mermaid's internal db structure.
 */
import { type FlowchartAST } from '../types/flowchart.js';
/**
 * Parse a flowchart diagram string into an AST
 */
export declare function parseFlowchart(input: string): FlowchartAST;
/**
 * Detect if input is a flowchart diagram
 */
export declare function isFlowchartDiagram(input: string): boolean;
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