mpai is an open-source terminal developer tool designed to bring real-time multiplayer collaboration to existing Codex and Claude Code AI sessions. Created by Reagan Stock, the tool enables software engineers to collaborate directly inside command-line AI workflows without losing session history or context.
Using mpai, team members can join an explicitly shared native session from another Mac and immediately access the full context of the active conversation. Prompts sent by collaborators arrive with their name attached to distinguish inputs. To ensure security and control, mpai relies on Tailscale to keep network traffic private, while the host Mac remains in full control of the session.
mpai is an open-source developer tool that adds terminal multiplayer functionality to existing Codex and Claude Code sessions.
A developer explicitly shares a native terminal session from their Mac. Teammates can join from another Mac, access the existing context, and send prompts with their name attached.
mpai relies on Tailscale to keep network traffic private, and the host Mac always maintains full control over the shared session.
mpai supports Mac systems running Codex or Claude Code terminal sessions.
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