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Building hobai

What shipped, what broke, and why it's built the way it is.

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Twice the runs on one worker: optimizing hobai for 1,000 at once

One hobai worker on a 2 vCPU server now runs 1,000 tasks at once, and 908 succeed, up from 456. Here's what made the difference.

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Earlier

  • A provider-agnostic sandbox layer: adding E2B

    hobai's sandboxes moved from Daytona to E2B without a single line of agent code changing. Here's how the sandbox layer is built, and the rules that made the switch small.

  • How hobai is built

    The first post covered what hobai does. This one covers how it's built - where the agent runs, why it never holds a token that can write, and why a deploy doesn't kill a run.

  • hobai is live

    Describe a clear coding task, and hobai opens the pull request. Here's how it works end to end, and what it can and can't do yet.