A real, isolated Linux terminal for learning by building. You'll find opencode, the tools, and nothing to break: everything stays in the sandbox.
This space is private: it's our turn, not a public service. If you want to experiment and build in turn, the right way is to take your own turn — the method is meant to be copied, not squatted. Here, we train at home.
Click, log in with the login, and you're in a real Linux shell.
login: tour · password: sandbox-tour-2026
Learn by building, not by reading. The room is a real terminal where you practice the shell, the tools, opencode — before the real field. You test, you break, you start over, without damaging anything: the tower stays intact, the sandbox is there for trying.
Create a webapp with a friend and discuss it. Create a chess game and play it together. Test an idea, break it, redo it. The possibilities are infinite — it all starts with a command in the sandbox.
The room is designed to be autonomous: it runs on its own, without needing anyone. And its real purpose is to learn to handle the tower — understand its circuits, its skills, its guardrails, its way of advancing what is earned. You train in the sandbox to know how to navigate in the real world.
Training dungeons with levels: progressive challenges in the sandbox — learn a command, tame git, build a small program, make opencode talk, understand a circuit of the tower. And security dungeons: learn to protect by playing — spot an open door, understand a guardrail, secure a path. Each level is earned, never just given (like in the game). Then we'll open the room to guides, with paths and challenges.
⚠️ Note: all of the above are ideas, not promises. We only deliver what is actually built and tested — "written ≠ done".
opencode (the copilot, with the key), git, curl, Python, Node, build tools, vim, nano. Build, break, learn — the sandbox is for that.
Access is via the web terminal (SSH to the container possible on request). The sandbox is isolated: what you do there never touches the tower. Direct SSH access can be opened when needed.
Who can play in the sandbox, right now:
1 USERS — the sandbox is personal for now; we can open it to the guild.