Cobalt

What it does

Cobalt is an AI developer that works on your GitHub repository from its own cloud computer. Describe a task, watch your app change live, and come back to working software - no local setup required.

Cobalt is the cloud-first harness for coding agents. Run every task in a dedicated environment, automate work with Loops, and collaborate on working software.

Built for software engineering teams that want to run multiple isolated coding agents in the cloud, automate recurring work with Loops, and stay in control. Choose an agent and attach the repositories. Cobalt provisions an isolated cloud computer, runs the code and services, and keeps the preview, changes, and pull request attached to the task. Choose Codex, Gemini, Claude Code, GitHub Copilot, Cursor, Grok, OpenCode, or Pi. Accounts and models can differ; the task environment, collaboration, verification, and delivery workflow stay consistent. Choose from 22 built-in themes, pair your preferred light and dark palettes, or import a portable Cobalt pack or standalone VS Code JSON or JSONC…from cobaltcode.ai

In the maker’s words, at launch

Hi HN, I'm building CobaltCode, a platform for running coding agents inside persistent development environments. Basically I was fed up with git worktrees and having to run everything locally, usually one at a time so built CobaltCode.ai. Each task gets an separate vm with its own repository checkout, dependencies…

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