/**
 * Frontmatter validator - validates spec frontmatter for quality issues
 *
 * Phase 1b: Frontmatter Validation
 * - Required fields: status, created
 * - Valid status values: planned, in-progress, complete, archived
 * - Valid priority values: low, medium, high, critical
 * - Date format validation (ISO 8601)
 * - Tags format validation (array of strings)
 */
import type { ValidationRule, ValidationResult } from '../utils/validation-framework.js';
import type { SpecInfo, SpecStatus, SpecPriority } from '../types/index.js';
export interface FrontmatterOptions {
    validStatuses?: SpecStatus[];
    validPriorities?: SpecPriority[];
}
export declare class FrontmatterValidator implements ValidationRule {
    name: string;
    description: string;
    private validStatuses;
    private validPriorities;
    constructor(options?: FrontmatterOptions);
    validate(spec: SpecInfo, content: string): ValidationResult;
    /**
     * Validate date field format (ISO 8601: YYYY-MM-DD or full timestamp)
     */
    private validateDateField;
}
//# sourceMappingURL=frontmatter.d.ts.map