Add a second machine

You end with your second machine listed as reachable and allowed to run workers.

SpecWithCode
1:13
Codex
Narrated, with captions

Recorded on SpecWithCode 1.0.47 with SpecWeave 3.0.23, 18 October 2026, added 18 October 2026. The current release is SpecWithCode 1.0.191.

Before you start: SpecWithCode on both machines (Mac, Windows 10 or 11 on x64, or Linux); A SpecWithCode Connect account on the new machine; the main machine does not need one.

Length 1:13Captions

Steps

On the new machine, sign in to SpecWithCode Connect at the bottom of the Settings sidebar and turn on Enable SpecWithCode Connect under Settings, Connections. On a server, run specwithcode connect.
On the new machine, open Settings, Connections, and choose Invite this machine. Paste your main machine's environment ID, give it a name and choose Make the line.
Copy the line. It works like a password, so paste it only on your main machine. A Connect line works once, within an hour.
On the main machine, open Settings, Connections, paste the line under Add a machine and choose Add machine. It checks the address answers as that machine before saving it.
Choose Allow workers on the card and pick the most a worker there may do. Coordinators can now start threads there, and each one uses that machine's own sign-ins for Claude Code, Codex and the other agents.

Recorded headlessly in one take on two disposable SpecWithCode 1.0.47 servers with disposable homes, a Mac (main) and a Mac mini (new machine) on one tailnet, 18 October 2026. The invitation line, the Mac mini's Tailscale address and the pairing code are blurred. The one-time pairing code was made off camera on the Mac mini with `specwithcode pair` (Operate threads scopes); the welcome wizard, adding the sample project and choosing Full access happened off camera, and Full access was chosen for the demo only. Navigation is sped up 2x where marked and one frame is held as a still. Known issues in 1.0.47: Allow workers asks for a pairing code although the guide describes one click; Connect machine fails with 'Could not pair this machine'; and a coordinator could not yet start a worker on the added machine ('no execution binding'), so the video ends at Allowed rather than a running worker. Narration is an AI voice (ElevenLabs, the author's cloned voice); captions are timed from the voice service's character timestamps. Since this recording, machines pair through SpecWithCode Connect: only the new machine links Connect, Tailscale is an optional fallback, and Allow workers no longer needs a pairing code. Workers on a Mac, Linux or Windows use each agent's own sign-in, subscriptions included.

Transcript

Built from the caption file of the narration.

0:00 What you need

Add a second machine. Both machines need Tailscale, signed in to the same account, with MagicDNS and HTTPS certificates turned on.

0:11 Make the line on the new machine

On the new machine, here a Mac mini, open Settings, then Connections. Choose Invite this machine, give it a name, and choose Make the line. SpecWithCode publishes itself on the Mac mini's private Tailscale name, never on the public internet. The line works like a password, so it stays blurred here.

0:32 Add it on the main machine

On your main machine, open the same Connections page. Paste the line under Add a machine, and choose Add machine. The main machine checks that the address answers as that Mac, then lists it as reachable. Its address is blurred too.

0:49 Allow workers

Pick the most a worker there may do. Version 1.0.47 also asks for a one-time pairing code from the Mac mini, made there beforehand with specwithcode pair. Then choose Allow workers. The card now reads Allowed: Full access.