If you've used other browser-based code editors, you've probably noticed that the terminal feels off. You can run a script. You can print to stdout. But the moment you try to install a package and then actually use it in the next command, something breaks. The environment doesn't carry over. It feels like every command starts from scratch in a vacuum.

That was the problem I wanted to solve when building the terminal for Cloudpen. Not just a place to run isolated snippets, but a proper environment where you can install dependencies, run build tools, and have everything you did in one command still be there for the next one.

What most cloud terminals get wrong

The core issue is that running code in the browser is hard to do without cheating somewhere. A lot of tools use sandboxed environments that look like a terminal but don't behave like one. They're good enough for demos. They fall apart in real work.

The thing developers actually need is simple: if I install something, it should be there when I run the next command. That's it. That's the whole requirement. Surprisingly few cloud tools actually deliver it.

How Cloudpen handles it

Without going into the full technical detail, the short version is this: every command runs in a completely isolated environment, but all commands within your session share the same filesystem. So when you run npm install, those files are written somewhere. When you run your next command, that somewhere is exactly where it looks.

Package installs work. Build tools work. Multi-step workflows work. And because each command runs in a clean, isolated environment, there's no bleed between users or sessions.

The current terminal is optimized for commands that run to completion, while live application previews are handled through Cloudpen's deployment system.

On the free plan, you can run any file in your project and see the output directly in the terminal. The live coding environment where you type commands yourself is on the Pro plan. Both use the same underlying execution model.

If you want to try it, Cloudpen is at cloudpen.dev. The free plan doesn't require a card.

webdev #devtools #showdev #programming #cloud