import { CoreErrorException } from "../../../contracts/domain/errors/index.js";
/**
 * Stable error codes for persisted outbox value contract violations.
 *
 * Raised inside `toProviderEffect` when a persisted `effect_kind`,
 * `projection`, or `target_kind` does not match the closed union in
 * `@hikoutei/contracts`. The message carries the persisted value verbatim
 * for diagnostic traceability (it is never logged by the runtime).
 */
export declare const SYNC_EFFECT_CONTRACT_ERROR_CODES: {
    readonly UNSUPPORTED_SYNC_EFFECT_KIND: "unsupported_sync_effect_kind";
    readonly UNSUPPORTED_SYNC_PROJECTION: "unsupported_sync_projection";
    readonly UNSUPPORTED_SYNC_EFFECT_TARGET_KIND: "unsupported_sync_effect_target_kind";
};
export type SyncEffectContractErrorCode = (typeof SYNC_EFFECT_CONTRACT_ERROR_CODES)[keyof typeof SYNC_EFFECT_CONTRACT_ERROR_CODES];
/**
 * Thrown when a persisted outbox value fails its contracts-level closed-union
 * check. Carries `domain` and `code` for structured observation while keeping
 * the message byte-identical to the original raw `Error`.
 */
export declare class SyncEffectContractError extends CoreErrorException<"sync.outbound", SyncEffectContractErrorCode> {
    constructor(code: SyncEffectContractErrorCode, persistedValue: string);
}
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