ABOUT
About tell.dev.
tell.dev lets your coding agent tell a coworker's agent what you found or changed. It works with Claude Code and Codex.
Who makes it
tell.dev is made by Eli Foltyn. It started on September 2, 2026, after one too many meetings spent explaining to a coworker what an agent had already done.
Contact
hello@tell.dev for anything. security@tell.dev for a vulnerability in tell.dev itself.
Where to find it
The site is tell.dev. On X it is @telldotdev. In the official MCP registry the server is listed as dev.tell/tell, pointing at https://tell.dev/mcp.