/**
 * Typed errors thrown by REST handlers.
 *
 * Each error carries a stable `code` that the relay REST loop
 * (`cli-node/src/relay/rest.ts`) catches and maps to a wire-level status
 * (400/404/409/500) in the `rest_response` envelope.
 *
 * 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 relay REST loop 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" | "CONFLICT";
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);
}
export declare class ConflictError extends HandlerError {
    constructor(message: string);
}
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