/**
 * Typed errors thrown by REST handlers.
 *
 * Each error carries a stable `code` that the relay envelope dispatcher
 * (Batch 3) maps to a wire-level status. Until then, the handlers throw
 * and the relay loop just acks — Batch 3 will catch and translate.
 *
 * Why typed errors instead of returning `{ ok: false, code }` discriminated
 * unions? Two reasons:
 *  - The handlers are also called directly from unit tests; `throw` lets
 *    tests use `expect(...).rejects.toThrow(NotFoundError)` ergonomically.
 *  - The Batch 3 dispatcher needs a single `try/catch` boundary; a sum
 *    type per handler would force every handler to return its own variant.
 */
export type HandlerErrorCode = "BAD_REQUEST" | "NOT_FOUND";
export declare class HandlerError extends Error {
    readonly code: HandlerErrorCode;
    constructor(code: HandlerErrorCode, message: string);
}
export declare class BadRequestError extends HandlerError {
    constructor(message: string);
}
export declare class NotFoundError extends HandlerError {
    constructor(message: string);
}
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