Nessie Computer lets the agents in your Nessie team work on your own computer. They can read the folders you share, run the programs you allow and use the apps installed there. You decide what they can use, on the computer itself, and you can pause them at any time.
It runs on Mac, Windows and Linux. On a Mac it lives in the menu bar; on Windows, in the notification area beside the clock; on Linux, as a service you control from the command line.
Full guides: Nessie Computer guides
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Install it on the computer the agents should use. Download the latest package from Releases:
Computer Download Needs Mac Download for Apple silicon Apple silicon (M1 or newer), macOS 15 or later Windows Download for Windows x64 Windows 10 or 11, 64-bit Linux Debian / Ubuntu (.deb) · Fedora (.rpm) x86-64 Every computer needs its own copy. Install guide
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Add a team. Open Nessie Computer. It shows an 8-digit pairing code. In Nessie, open Computers, choose Add a computer and enter the code. Nessie shows this computer's name; choose Connect. Step by step
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Check what the team can use. Pick the team in the Team list at the top and open Access.
| By default | You can | |
|---|---|---|
| Folders | A Nessie folder in your home folder | Add or remove folders |
| Programs | Apps from UnlikeOtherAI, Claude Code, Codex and T3 Code | Allow more, block some, or allow none |
| Other programs | Agents ask first. You choose Allow once, Always allow or Don't allow | Answer on the computer |
| Local apps | Every app on this computer that agents can talk to (MCP servers) | Switch any off |
| Claude Code and Codex | Available if installed and signed in on this computer | Switch either off in AI |
| Websites | None | Add the sites the agents' browser may open |
Programs run under your account, so a program you allow can open any file you can. Allow programs you trust. How access works
- Pause. Choose Pause in the menu bar or notification-area menu. Agents start nothing new until you choose Resume, even after a restart. Pausing
- Several teams. Add each one. In the window, pick a team from the Team list, then change its access, documents and AI. Several teams
- Keep your documents on the computer. Open Documents, turn on Keep a copy of {team}'s documents on this computer and pick a folder. Every document you can read in that team syncs both ways. Documents
- Use your ChatGPT plan. Open AI, choose Add a ChatGPT plan and sign in with ChatGPT. Give each connection a name you recognise. The computer opens OpenAI’s personal-agent OAuth sign-in and sends requests to OpenAI itself, including when connected to hosted Nessie. A blocked sign-in shows a red message with the next step. Choose the connection’s model in Nessie under Connected accounts → AI plans. On a Mac, idle team connections briefly reconnect for sign-in. If the browser attempt expires, start sign-in again from AI; your name is kept. AI
- Update on a Mac. Nessie Computer replaces its runtime after its work ends. Stale records from an ended runtime do not require restarting macOS. Settings and updates
- Disconnect a team. Pick it in the Team list, open Settings, choose Disconnect…. Disconnect or uninstall
Everything the app does, the nessie-computer command does too, with the same
words. (nessie-executor is the same command under its older name.)
nessie-computer status # what each team is doing
nessie-computer add # add a team: get a code
nessie-computer pause # pause every team
nessie-computer resume --team "Sales · Acme"
nessie-computer access show --team "Sales · Acme"
nessie-computer access programs allow "npm *" --team "Sales · Acme"
nessie-computer requests list # programs waiting for your answer
nessie-computer help access # help for any commandAdd --json to any command for scripts. Command line guide
· Command reference
FSL-1.1-ALv2: fair source. You may use, inspect, change and share it for permitted purposes, including internal commercial use; competing commercial offerings are restricted. Each version becomes available under Apache 2.0 two years after its release. Bundled third-party components keep their own licences.
Error and crash reporting uses the standard Sentry SDKs; see configuration and verification.
Nessie Computer checks its signed GitHub update feed. In Settings → Software updates, review Show release notes before accepting an offered update. It downloads, waits for current work and restarts; your teams and settings stay on the computer. Fresh installations ask first. Existing automatic-update preferences are preserved. See Settings and updates for reminders and automatic installation. A published package becomes an offered update only after its signed catalogue is published; the current stable rollout limits are recorded in automatic updates.