{"slug": "show-hn-cobaltcode-dedicated-persistent-computer-for-codex", "title": "Show HN: CobaltCode – Dedicated persistent computer for Codex", "summary": "Vlad launched CobaltCode.ai, a platform that runs coding agents inside persistent virtual machines with isolated environments for each task, using the user's own OpenAI subscription. The product is currently free and supports OpenAI Codex in production, with plans to add Cursor Agent, Claude Code, GitHub Copilot CLI, OpenCode, and Pi. Repository support is limited to GitHub and Azure DevOps, with credentials injected only for active operations.", "body_md": "Hi HN,\n\nI'm building CobaltCode, a platform for running coding agents inside persistent development environments.\n\nBasically 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, running services, agent session, previews, and persistent state. It can also run your app inside the vm so you can preview different features in parallel.\n\nYou can leave a task, resume it later, or save the computer as a reusable starting point. The agent is a full-fledged Codex that runs without limits in the sandbox and can run commands, modify files, start applications, and expose browser previews from inside the isolated environment.\n\nIt uses your OpenAI subscription so you don't pay for tokens in CobaltCode and the product is currently free while I'm trying to figure out how useful it is.\n\nCobaltCode currently supports OpenAI Codex in PROD and I am also adding Cursor Agent, Claude Code, GitHub Copilot CLI, OpenCode and Pi soon.\n\nFor repository providers the support is limited to GitHub and Azure DevOps for now. Credentials are injected only for the active operation and excluded from saved computer state.\n\nIt is still early, and I would especially appreciate feedback on:\n\nWhat would make this useful for your own development workflow What features you think may be useful to add Any bugs or mistakes\n\nDemo: [https://youtu.be/1yyhj5wYyvA](https://youtu.be/1yyhj5wYyvA)\n\nI also submitted it for OpenAI Build Week here, I'd appreaciate the support: [https://devpost.com/software/cobalt-code](https://devpost.com/software/cobalt-code)\n\nHappy to answer technical questions or help in anyway\n\nVlad\n\nComments URL: [https://news.ycombinator.com/item?id=49027309](https://news.ycombinator.com/item?id=49027309)\n\nPoints: 1\n\n# Comments: 0", "url": "https://wpnews.pro/news/show-hn-cobaltcode-dedicated-persistent-computer-for-codex", "canonical_source": "https://cobaltcode.ai/", "published_at": "2026-07-23 20:06:19+00:00", "updated_at": "2026-07-23 20:22:42.900404+00:00", "lang": "en", "topics": ["ai-agents", "developer-tools", "ai-products", "ai-infrastructure"], "entities": ["CobaltCode.ai", "OpenAI Codex", "Cursor Agent", "Claude Code", "GitHub Copilot CLI", "OpenCode", "Pi", "GitHub"], "alternates": {"html": "https://wpnews.pro/news/show-hn-cobaltcode-dedicated-persistent-computer-for-codex", "markdown": "https://wpnews.pro/news/show-hn-cobaltcode-dedicated-persistent-computer-for-codex.md", "text": "https://wpnews.pro/news/show-hn-cobaltcode-dedicated-persistent-computer-for-codex.txt", "jsonld": "https://wpnews.pro/news/show-hn-cobaltcode-dedicated-persistent-computer-for-codex.jsonld"}}