Background daemon start-up stands down when Claude Code is exiting

What

Claude Code can use a background daemon, a helper program that keeps running behind the scenes. It may start one early, which is called pre-warming. A process that is exiting now avoids starting it.

• The routine that makes sure the daemon is running now takes a standsDownAtExit option.
• When the option is set and the daemon is not in the retired state, the routine stops early. It does not spawn the daemon or start its service. Before, it always started or spawned the daemon.
• If the process is exiting, the routine returns a "stood down" result.
• The spare pre-warm passes standsDownAtExit. It is skipped entirely when the process is exiting, with the log line bg: pre-warm not sent, because this process is exiting.
• If the daemon stood down for any other start request, that request is retried.
• The retry that runs after a jump in the system clock clears the option.

Why

This stops a Claude Code process that is shutting down from starting the background daemon again, so no stray daemons are left behind at exit.