DevBox

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Open Source AI coding agent that drafts pull requests

Helps engineering teams send Linear tickets to an AI agent that plans, codes, tests, and self-reviews, so they get reviewable code to merge instead of starting from scratch.

Built by Soumyadeb Mitra · Developer Tools · Open Source · Free

Coming soon on Launch Llama Tools

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Soumyadeb Mitra (Joined Nov 2026)

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Helps engineering teams send Linear tickets to an AI agent that plans, codes, tests, and self-reviews, so they get reviewable code to merge instead of starting from scratch.

DevBox demo video

About

Each task runs in its own sandbox in your cloud, and that sandbox holds only placeholder tokens while an egress proxy injects the real credentials and limits writes to your repositories. Work moves through a gated pipeline of orientation, planning, plan review, implementation, and self-review, so no code is written until the plan passes review. Learnings are distilled into your repo as commits that are reviewed like code, and the whole system can be self-hosted with Docker Compose or Kubernetes under the MIT license.

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Key Features

Runs each task in its own isolated sandbox inside your cloud
Gates work through planning, plan review, implementation, and self-review
Injects real credentials via an egress proxy so sandboxes hold only placeholder tokens
Routes review comments, @mentions, and failed CI runs back to the running task
Distills learnings into your repo as commits reviewed like code

Use Cases

Turning a Linear ticket, such as adding retry logic to webhook delivery, into a draft change for an engineer to review
Delegating routine engineering tickets to an agent while humans review the plan and the final change before merging

From the founder

Who it's for

“Engineering teams including heads of engineering, platform teams, and developers”

Why I built it

“We are a customer data infrastructure company with close to 200 Open Source projects. Managing so many projects is a big task. Coding tools made individual developer fast but not the entire org. So we built an AI teammate for the entire engineering team that they can delegate to, it learns from the feedback, builds a shared intelligence, and helps us move fast.”

— Soumyadeb Mitra, founder of DevBox

Who it is for

Engineering teams that want agents working tickets inside their own cloud with their own API keys
Platform teams deploying self-hosted tooling on Docker Compose or Kubernetes