Claude Code internal msg system

Описание: Inter-Agent Messaging: How My Claude Code Sessions Talk to Each Other

I walk through my multi-agent development setup where multiple Claude Code sessions running in separate iTerm2 terminals communicate with each other using a custom MSG tool.

Timestamps:
0:00 Intro - what this video is about
0:22 My terminal setup (main + tools sessions)
0:54 How the sessions are organized (orchestrator vs tooling)
1:15 How the MSG messaging system was born
1:27 Live demo: asking "main" to get a tool list from "tools"
2:30 Walkthrough of the MSG command in action
3:06 How "tools" receives and processes the message
3:32 The tmux persistence layer — how sessions read each other
4:17 What should have happened vs what actually happened
4:26 Second demo: agents chatting back and forth
5:20 How models figure out they're talking to another agent
5:46 When agents don't reply — the "peek over shoulder" fallback
6:11 How the idle/wait message loop works
6:38 Summary of how it works
6:43 Real-world use case: WP Multitool → Marketing cross-project tasks
7:32 Q&A and next steps
7:49 Open sourcing — built on iTerm + tmux
8:19 Outro

The stack:
Claude Code (Anthropic CLI)
iTerm2 with custom profiles
tmux for session persistence
Custom bash/Python tooling (~90+ CLI tools)

Built with open source tools — planning to release the messaging system. Questions? Drop a comment, happy to do a deeper dive.