Synapse is Artefact's shared Claude Code server — one Claude Team seat, several of us, one connected nervous system. Paste the invite Alex sent you to get a one-line installer.
Step 01 — Activate your access
Paste your invite
Your invite is one-time-use and pre-bound to a private Linux account on Synapse — your terminal, your skills, your memory. The Claude Team seat that powers claude is shared (that's the whole point), and Alex assigns it for you — you don't pick one.
Step 02 — Existing keys for this seat
Active keys
These keys can already ssh synapse as —. Check any you want revoked when the new key is registered. Revoke removes the line from authorized_keys within ~30 seconds of the new key being accepted.
Step 03 — Name this device & download installer
One key per device.
The download is a tiny shell wrapper. Your SSH keypair is generated locally on your Mac by the standard ssh-keygen when you run the installer — the browser never touches the private key.
Step 04 — Run the installer
Double-click the installer.
The .command file is now in your ~/Downloads/ folder. Double-clicking it opens Terminal, which runs the standard Synapse onboarding script: it installs VS Code if missing, generates your SSH key with ssh-keygen, patches ~/.ssh/config, and posts your public key to Synapse. Slice B's authorized-keys sync (30 s tick) propagates it to the server.
Double-click~/Downloads/synapse-install-<device>.command in Finder.
If Gatekeeper warns "from an unidentified developer", right-click the file → Open → Open in the dialog.
Terminal opens. You may be asked for a passphrase (recommended) and your Mac password (for Homebrew if it's not installed yet).
When the script finishes, open any terminal and run ssh synapse — you're in.
Fallback — power users / headless / unsupported browser
Or paste this in Terminal.
If you'd rather generate the key with ssh-keygen on your Mac (the original onboarding path), open Terminal and paste the line below. The script installs VS Code + extensions and configures the workspace — full setup, not just the SSH key. Idempotent, safe to re-run.
~ ✦ synapse installer (fallback)
Detected platform:—switch →
Already using 1Password SSH Agent? Use the terminal fallback above, or run the browser flow and import the downloaded key into 1Password afterward — see MAC-TROUBLESHOOTING.md.
Loi 25 · Sovereignty
Quebec data, Quebec metal.
Synapse runs on a dedicated server in Beauharnois, QC (OVH BHS7). All conversations, code, and artifacts stay on Canadian soil. Each Linux account is isolated — your terminal history, your Claude conversations, your SSH keys are yours alone. The Claude Team seat that runs claude is the only thing pooled.