Show HN: The Box – Run multiple Claude CLI agents in parallel in the cloud
firdavs9512 Wednesday, December 10, 2025
Hey HN,
I'm a solo developer and kept running into the same problem: I'd want Claude CLI to work on multiple tasks at once, but locally I could only run one instance at a time. So I built The Box.
It lets you spin up isolated sandbox environments in the cloud and run Claude CLI agents in parallel. You write the prompt, pick a GitHub repo, and it handles the rest – creates a branch, does the work, and opens a PR.
The core workflow: - Connect your GitHub repos - Create tasks with prompts - Claude CLI runs in isolated sandboxes - Get notified when done (browser push or Telegram) - Review and merge PRs
Tech stack: Go (Fiber) for backend services, Next.js for frontend, PostgreSQL, Redis for signaling, RabbitMQ for task queue. Workers run Claude CLI in Docker containers.
Currently free to use (with limits) while I finish payment integration. Would love feedback from anyone who's tried to scale their AI coding workflow.