/**
 * Structured logger for OCC.
 * Outputs JSON to stderr when LOG_FORMAT=json, otherwise human-readable.
 * Levels: debug, info, warn, error
 */
export declare const logger: {
    debug: (component: string, msg: string, data?: Record<string, unknown>) => void;
    info: (component: string, msg: string, data?: Record<string, unknown>) => void;
    warn: (component: string, msg: string, data?: Record<string, unknown>) => void;
    error: (component: string, msg: string, data?: Record<string, unknown>) => void;
};