tr3x

Your T3 Code threads, as tabs in Rex.

T3 runs the agents. Rex is where you read and reply. Each open thread is a tab in one Rex session, T3 Code, sorted like T3's sidebar: whatever needs you on top. tr3x runs no agent of its own: every message, approval and setting goes to T3.

What it does

• One tab per thread. Approvals, questions, failures and unread results first, then the inbox, then whatever's working.
• Reply where you read. One input under the conversation, with T3's model, effort and access chips. Approvals and questions are buttons: one click, or one tap on a phone.
• A real terminal. Rex's scrollback, find, selection and links all work. Markdown, tables, code, pictures and HTML previews render inline.
• Rex's markers are T3's. A tab's dot shows what its thread waits on, and its icon the provider: Claude, Codex, Cursor and the rest, as Rex shows them for their own CLIs.
• Every machine. Threads from each machine you run T3 on share one session, in one order.
• Any screen. Rex's Mac and iPhone apps watch the same session. Fit to This Device sizes it to the one you're on.
• Usage limits. A thread stopped on its limit says when it resets. Reply shows what's left.
• Pull requests. /pr create commits, pushes and opens one; /pr shows it in a drawer.
• Updates itself. tr3x updates in the background, and /update updates T3 on any machine and the Rex app on each Mac attached to it.

Install

Needs	A Mac or Linux machine, Rex (Rex Beta on a Mac), T3 Code running with at least one project
Optional	Chrome or Chromium for HTML previews; sup for pull requests, which the drawer offers to add

curl -fsSL https://raw.githubusercontent.com/macnason/tr3x/master/install.sh | sh

• Downloads the latest release, checks its SHA-256 and installs ~/.local/bin/tr3x.
• Adds tr3x's actions and keys to Rex's config and switches Rex to T3 Code. Sync runs whenever Rex does.
• Pairs this machine's T3, then offers the other machines on your tailnet that run T3.
• On a Mac it opens Rex and T3 Code if they aren't running. On Linux it runs Rex's server as a service.

tr3x doctor checks each part and says how to fix it. tr3x uninstall undoes every step. tr3x updates notify or off stops automatic updates. From a clone, sh install.sh builds with cargo instead.

Getting started

To	Do
See your threads	Open Rex. The T3 Code session has a tab per open thread.
Start a thread	⌘T in the session, or ⌃⌘N anywhere. The chips pick project, model and worktree.
Reply	Type under the conversation, Enter. / lists commands and the agent's skills.
Answer an approval	Click Approve, Always or Decline, or type a, s or d.
Jump to what needs you	⌃⌘I, on any machine.
Settle a thread	Close its tab. Find Thread… (⌘⇧P) brings it back.

More machines

• An always-on host. Agents stop when their T3 quits. Run T3 as a service (t3 service install) on a Linux box or a Mac you leave on, and install tr3x there. It prints the rex hosts add command for your other devices, which then need only Rex. Choosing the host has the rest.
• Another machine. tr3x pair finds the machines on your tailnet that run T3 and pairs each.
• Your phone. Rex for iPhone shows the same session. Run Fit to This Device there.

Let your agent drive it

tr3x comes with a skill for coding agents: install and check tr3x, fix a missing tab, pair a machine, change a setting, or settle, snooze and rename threads.

npx skills add macnason/tr3x

Docs

• Using tr3x: every key, command and setting, and known limits.
• Choosing the host: which machine runs Rex and sync, and moving it.
• How it works: sync, pairing, the panes, and install in detail.
• Contributing: building, testing, and clean screenshots.
• Security: what tr3x can reach, where its tokens live, and reporting a problem.

Works with T3 Code 0.1.7 and its nightlies (orchestration protocol 2), and Rex Beta 0.1.0. A daily check flags what each T3 nightly changes.

Credits

• Rex by Superlogical.
• T3 Code by Ping, which does the actual work.
• sup by SuperUltra, which reviews and merges pull requests in the drawer.
• T1code by Maria, the original reference for tr3x's T3 client.

tr3x is an independent project. It isn't affiliated with Superlogical, Ping or SuperUltra.

License

MIT, by Mac (macnason). t3client retains its MIT license.