I got tired of copy-pasting between agents for simple coordination. Everything I found was a framework or a hosted service. I just needed them to talk.

Walkie-Clawkie is a single JS file, zero dependencies. It’s an MCP server that gives agents walkie_send and walkie_agents. Same machine: file mailboxes. Cross machine: HTTP relay you expose however you want. Unknown agents need human approval before they can get through.

https://github.com/jahala/walkie-clawkie