/**
 * Document tier classification system.
 * Classifies documents into 5 tiers based on content structure.
 */
export declare const TIERS: readonly ["guide", "standard", "example", "reference", "admin"];
export type Tier = (typeof TIERS)[number];
export interface TierDefinition {
    id: Tier;
    name: string;
    description: string;
    sizeRange: {
        min: number;
        max: number;
    };
    indicators: string[];
    headingPatterns: RegExp[];
}
export declare const TIER_DEFINITIONS: Record<Tier, TierDefinition>;
export interface TierClassificationResult {
    tier: Tier;
    confidence: number;
    scores: Record<Tier, number>;
    reasoning: string[];
}
/**
 * Classify document content into a tier
 */
export declare function classifyTier(content: string): TierClassificationResult;
/**
 * Get tier definition by ID
 */
export declare function getTierDefinition(tier: Tier): TierDefinition;
/**
 * Check if a string is a valid tier
 */
export declare function isValidTier(value: string): value is Tier;
/**
 * Get tier display name
 */
export declare function getTierDisplayName(tier: Tier): string;
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