import Database from 'better-sqlite3';
import { ConcentrationState } from '../../schema/concentration.js';
export declare class ConcentrationRepository {
    private db;
    constructor(db: Database.Database);
    /**
     * Start concentration on a spell
     */
    create(concentration: ConcentrationState): void;
    /**
     * Get active concentration for a character
     */
    findByCharacterId(characterId: string): ConcentrationState | null;
    /**
     * Break concentration (delete the record)
     */
    delete(characterId: string): boolean;
    /**
     * Check if a character is concentrating
     */
    isConcentrating(characterId: string): boolean;
    /**
     * Get all active concentrations (for debugging/admin)
     */
    findAll(): ConcentrationState[];
}
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