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mpai — your teammate's session, with their name on the prompt
A terminal tool (MIT, macOS) that joins an existing, native Codex or Claude Code session running on a teammate's Mac — not a new IDE, not a cloud copy of the conversation. The host explicitly shares a session over your existing Tailscale network; the guest arrives with the full context and prompts under their own name, and the demo is a real two-Mac recording of exactly that, with Claude addressing each participant separately. Launched on Product Hunt today at #12 with 94 votes. CI and CodeQL run on every commit, which is more rigor than the repo's age would suggest: it was created Saturday and has three GitHub stars.
This is the meat-proxy complaint deleted at the mechanism level. The relay human exists because the session has one seat, so whoever holds it becomes the API between the agent and everyone else — mpai adds seats instead. It's also the most honest launch copy in the pool: a public-alpha boundary doc, "trusted teammates" named outright as the trust model, and a pinned pilot issue stating they're measuring completed rooms and week-later return, not launch votes. The honesty precedent (HART OS 07-27, kassette 07-14) says that discipline at 44 stars is a better signal than polish at four thousand; this is that bet again, one day earlier in the tool's life than we've ever placed it.
Reach for it when a teammate asks "what did Claude say" for the third time in one afternoon. Delete the transcript paste into Slack and the screen-share where one person types. Tradeoffs: one day old, three stars, alpha, and it says so on the first screen; macOS plus Tailscale only; a shared session is a capability grant — the guest is prompting an agent that holds the host's write access, which is exactly the per-collaborator ceiling the 07-23 doorbell watch asked for and nobody has shipped; and it wraps native sessions, so a harness update can break it under you.