export interface MermaidBlock {
    index: number;
    startLine: number;
    endLine: number;
    content: string;
}
export interface MermaidValidationError {
    blockIndex: number;
    startLine: number;
    message: string;
    diagramSnippet: string;
}
export interface MermaidValidationResult {
    valid: boolean;
    errors: MermaidValidationError[];
    structuralErrors: string[];
    blockCount: number;
}
export interface ExtractionResult {
    blocks: MermaidBlock[];
    structuralErrors: string[];
}
/**
 * Extracts mermaid code blocks from markdown content.
 * Also detects structural issues like unclosed fences and empty blocks.
 */
export declare function extractMermaidBlocks(markdown: string): ExtractionResult;
/**
 * Validates all mermaid diagrams in the given markdown.
 * Uses the mermaid package's parse() function for syntax validation.
 * Falls back gracefully if mermaid is unavailable.
 */
export declare function validateMermaidDiagrams(markdown: string): Promise<MermaidValidationResult>;
/**
 * Formats validation errors into a string suitable for returning to the AI agent.
 */
export declare function formatValidationErrors(result: MermaidValidationResult): string;
export interface SaveValidationOptions {
    content: string;
    attemptCount: number;
}
export interface SaveValidationResult {
    accepted: boolean;
    errorMessage?: string;
}
/**
 * Validates document content for mermaid diagram errors before saving.
 * After MAX_VALIDATION_ATTEMPTS failed attempts, accepts the document anyway.
 */
export declare function validateDocumentForSave(options: SaveValidationOptions): Promise<SaveValidationResult>;
/**
 * Resets the mermaid loader state. Used for testing.
 */
export declare function _resetMermaidLoader(): void;
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