Tip: `notify_when_idle` Lets a Cross-Session SendMessage Ping You Once When the Target Goes Idle
Claude Code Changelog·medium signal
Claude Code 2.1.236 adds a `notify_when_idle` option to cross-session `SendMessage`, giving opt-in one-shot notification when the session you messaged finishes and goes idle. Before this, coordinating two long-running sessions meant polling or guessing at completion. For anyone running an orchestrator session that farms work to teammates, this replaces a sleep-and-check loop with an event.