/**
 * Sequence Diagram Parser
 *
 * Parses Mermaid sequence diagram syntax into an AST using the vendored JISON parser.
 * The sequence parser returns an array of statements that we process into our AST.
 */
import { type SequenceAST } from '../types/sequence.js';
/**
 * Parse a sequence diagram string into an AST
 */
export declare function parseSequence(input: string): SequenceAST;
/**
 * Detect if input is a sequence diagram
 */
export declare function isSequenceDiagram(input: string): boolean;
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