import type { TraitDNA } from '../analyzer/dna.js';
import type { CreatureState } from '../store.js';
export type RarityTier = 'common' | 'uncommon' | 'rare' | 'epic' | 'legendary';
export interface RarityResult {
    tier: RarityTier;
    score: number;
    reasons: string[];
}
/**
 * Calculate rarity tier from Trait DNA and creature state.
 * Higher score = rarer creature.
 *
 * Target distribution:
 *   Common:    0-30  (~50% of creatures)
 *   Uncommon: 31-50  (~25%)
 *   Rare:     51-70  (~15%)
 *   Epic:     71-85  (~8%)
 *   Legendary: 86+   (~2%)
 */
export declare function calculateRarity(dna: TraitDNA | null, creature: CreatureState): RarityResult;
/** Display labels for rarity tiers */
export declare const RARITY_LABELS: Record<RarityTier, string>;
/** CSS color for rarity tier */
export declare const RARITY_COLORS: Record<RarityTier, string>;