Function backgroundTaskRefError

packages/runtime/src/shell-run-manager.ts:105–109

* The model reads BACKGROUND_TASK_REF_HELP; an operator reads the * `cause`. Dropping the rejected string outright would have made three call * sites indistinguishable in a log, so it travels the way `builtin-tools.ts` * carries its worker-protocol violations: out of the transcript, in ev

(ref: string)

 * stack.
 */
function backgroundTaskRefError(ref: string): Error {
  return new Error(BACKGROUND_TASK_REF_HELP, {
    cause: new Error(`Unsupported runtime background task ref: ${ref}`),
  });
}
type DriverExit =
  | { mode: 'pipes'; value: PipeProcessExit }
  | { mode: 'pty'; value: PtyProcessExit };