/**
 * Canonical JavaScript error codes for the product-facing host bridge.
 *
 * Public callers should prefer matching on `error.code` when present and
 * continue treating `error.message` as the backward-compatible fallback.
 */
import type { BridgeErrorCode } from "./bridge/contract.js";
export type HostErrorCode = BridgeErrorCode;
export declare class HostError extends Error {
    readonly code: HostErrorCode;
    constructor(code: HostErrorCode, message: string);
}
export declare function isHostError(error: unknown): error is HostError;
export declare function bridgeDestroyedError(): HostError;
export declare function rateLimitError(operation: string, maxCalls: number, windowMs: number): HostError;
export declare function unsupportedCapabilityError(capability: string): HostError;
export declare function hostRuntimeUnavailableError(subject: string): HostError;
export declare function binaryBridgeUnavailableError(): HostError;
export declare function invalidArgumentError(message: string): HostError;
export declare function timeoutError(message: string): HostError;
export declare function hostRejectedError(message: string): HostError;
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