/**
 * .what = ensures the isolated temp infrastructure exists
 * .why = creates physical storage in /tmp/ with symlink at gitroot for discoverability
 *
 * .note = symlink creation is idempotent — safe to call from parallel workers
 *
 * @throws UnexpectedCodePathError if /tmp/ does not exist
 */
export declare const genIsolatedTempInfra: (input: {
    gitRoot: string;
}) => {
    pathPhysical: string;
    pathSymlink: string;
};