Remote-machine messages add an asleep case and tell the model when it need not recheck

What

Claude Code can run commands on attached remote machines. The messages Claude, the model, receives when one of those machines stops answering have been reworked.

• host_asleep is a new result for a tool call (an action Claude takes) on a machine that reported it went to sleep. The message tells a withdrawn request apart from a paused command.
• host_unresponsive now takes a returnNoted flag. When the flag is set, Claude is told not to call the machine again until a later attached-machines note says it is reachable, or until the user says it is back.
• The note about unreachable machines now comes in three versions: return_noted, rechecked and call_only.
• The return_noted version tells Claude it need not check, because a later copy of the note will say when the machine reconnects.
• The rechecked version says the session will recheck a few times over the next five minutes.

Before, the note was a single fixed text. It said a call takes up to 10 seconds to fail and is the only way to learn whether the machine is back. host_unresponsive always told Claude to check again only when the user says the machine is back.

Why

This changes how Claude behaves after a remote machine goes to sleep or drops offline. It should spend fewer attempts on a machine that cannot answer yet.