/**
 * Bounded, credential-free summary of one Sandbox transport failure.
 *
 * A transport message carries the request URL, and that URL can carry userinfo
 * or a query token, so no contract payload ever repeats the message. A summary
 * is built from structured error members only: a status is re-emitted as an
 * integer, and a code or an error name is emitted only when it matches a bare
 * identifier, which cannot express a URL, a bearer, or whitespace.
 */
/** Which transport read one reason describes. */
export type TransportRead = "environment refresh" | "placement lookup" | "resource usage read" | "subscription read" | "account usage read" | "terminal attach" | "terminal acknowledgement" | "terminal metadata read" | "terminal socket" | "interactive start" | "interactive control" | "interactive control claim" | "interactive status" | "interactive attach" | "interactive prompt" | "interactive stop";
/** Name the read that failed and the cause, with nothing copied from it. */
export declare function transportFailureReason(read: TransportRead, error: unknown): string;