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Project Zero

Tessen's developer program: build with Tessen intelligence at no cost, in OpenCode.

Project Zero gives developers Tessen intelligence for real coding work at no cost during the Developer Alpha, inside the tools they already build with — starting with OpenCode. Requests run only on capacity Tessen has verified costs nothing to serve. Project Zero never falls back to paid capacity, and never bills you.

The journey

  1. Get access

    Sign in with your Tessen account. Access is granted per account.

  2. Install the Tessen CLI

    Requires Node.js 20 or newer, on macOS, Linux or WSL.

    BASH
    curl -fsSL https://github.com/TessenLab/zero/releases/latest/download/install.sh | sh

  3. Authenticate a machine

    Device sign-in from the Tessen CLI. No pasted keys.

    BASH
    tessen auth:login

  4. Configure OpenCode

    One command adds the Tessen provider.

    BASH
    tessen opencode

  5. Build

    Select tessen/project-zero.

    BASH
    opencode --model tessen/project-zero

Everything about Project Zero

What is Project ZeroWhy it is free, and the rules that keep it that way.Getting accessWho can use it and how to check.AuthenticationDevice sign-in and the credential it produces.OpenCode setupConnect OpenCode in one command.CLI usageEvery Project Zero command.Model aliastessen/project-zero, and what it means.Limits and the Zero PoolThe shared daily pool and its reset.TroubleshootingEach refusal, and its fix.
Project Zero on Tessen Platform →
Project Zero — Tessen Docs