Make existing Codex and Claude Code sessions multiplayer
Open-source terminal multiplayer for Codex and Claude Code. Join a teammate's explicitly shared native session from another Mac, arrive with the real context, and prompt with your name attached. Tailscale stays private; the host Mac stays in control.
AI coding got dramatically better, but the session stayed single-player.
My cofounder Hudson and I already had our Macs connected with Tailscale. The missing layer was not another IDE or chat app—it was a way to enter the exact Codex or Claude Code conversation already in motion, understand the context, and add a turn with a real human name attached.
That is what mpai does. I sent an attributed prompt from my Mac into Hudson’s existing Claude Code session; Claude received the teammate label and answered inside that exact session.
This is an honest public alpha: macOS + Tailscale, explicit session sharing, Claude Code support, and managed-mode Codex prompting. Standalone Codex stays view-only by default because we will not race an active desktop task for a prettier demo.
It is MIT licensed and built in public. I would especially value feedback on install friction, the sharing model, and the terminal interaction.
About mpai on Product Hunt
“Make existing Codex and Claude Code sessions multiplayer”
mpai launched on Product Hunt on August 3rd, 2026 and earned 116 upvotes and 13 comments, placing #11 on the daily leaderboard. Open-source terminal multiplayer for Codex and Claude Code. Join a teammate's explicitly shared native session from another Mac, arrive with the real context, and prompt with your name attached. Tailscale stays private; the host Mac stays in control.
On the analytics side, mpai competes within Open Source, Developer Tools and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how mpai performed against the three products that launched closest to it on the same day.
Who hunted mpai?
mpai was hunted by Reagan Stock. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of mpai including community comment highlights and product details, visit the product overview.
Reagan Stock