export interface ProblemDetailsOptions {
    /** Include only the request pathname as `instance`. Query strings are never included. Default false. */
    readonly includeInstance?: boolean;
    /** Prefix for code-specific problem types. Default `about:blank`. */
    readonly typeBase?: string;
    /** Maximum JSON error body inspected. Default 64 KiB. */
    readonly maxBytes?: number;
}
/**
 * Opt-in RFC 9457 formatting for Nifra's structured error envelope.
 *
 * The default `{ ok: false, error }` response remains unchanged. This plugin only converts that
 * framework envelope, so custom JSON errors and already-formatted problem documents pass through.
 * Raw JSON error Responses are supported through a capped clone; encoded responses are never drained.
 */
export declare function problemDetails(options?: ProblemDetailsOptions): import("@nifrajs/core").IdentityPlugin<never>;
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