Read-only-by-default scripts that let Claude Code (or any agent with shell access) actually run your messaging: read threads across every platform, work out where a person is reachable, and send with guardrails that stop the classic agent failures.
I used these to schedule ~40 coffees and dinners for a week in SF: the agent read each thread, drafted a reply in my voice, showed it to me, and sent it on whatever platform that person actually uses.