pub fn parent_is_agentmux_launcher() -> Option<bool>Expand description
Returns Some(true) if the host’s parent process is the AgentMux
launcher (under any of its on-disk names), Some(false) if it’s
something else, or None if the parent identity couldn’t be
determined (snapshot creation failed, parent process exited
between PID discovery and lookup). Callers treat None as “fall
through to the path-based guard” — see the call site.