Cursor, Claude Code, Codex all shipped multi-agent this week. Here is the missing piece.

This week, every major coding tool shipped multi-agent capabilities at once: Cursor launched background agents that run autonomously Claude Code revealed Agent Teams with sub-agent coordination Codex shipped parallel agent sessions via the Agents SDK Grok Build runs 8 agents simultaneously Windsurf launched 5 parallel agents The message is clear: the future is multi-agent. But there is a gap none of them filled. The missing layer Every tool above lets you spawn multiple agents. None of them solve what happens between agents: Task ownership : How does Agent A know Agent B already started the auth refactor? Presence : Which agents are active, which are stuck in a loop, which went idle? Communication : How do agents talk to each other without the human relaying messages? Right now, the human is the coordination layer. You are the message router, the task dispatcher, the conflict resolver. That does not scale past 3-4 agents. What coordination looks like We run 9 AI agents on one machine b