---
title: "Sandbox Debugging"
sidebarTitle: "Sandbox"
description: "Hand it a failing test — it runs the code in an isolated workspace and reports back"
icon: "terminal"
---

import { SlackThread, SlackMessage, Mention } from "/snippets/slack-message.mdx";

## The scenario

A test is failing and the stack trace alone isn't enough. You want Company Brain to actually run the code, not just describe what it *would* do.

## What happens

<SlackThread channel="#eng">
  <SlackMessage self hasAvatar time="5:41 PM">
    <img src="/images/company-brain/dhravya-slack-icon.jpg" alt="" />
    <Mention>supermemory</Mention> the `permissions.lease` unit test is failing on main — can you reproduce and tell me why?
  </SlackMessage>
  <SlackMessage bot hasAvatar time="5:42 PM">
    <img src="/images/company-brain/supermemory-slack-icon.png" alt="" />
    Reproduced in a sandbox against `main`.

    **Failure:** `permissions.lease` expects temporary access to expire in 15 minutes, but the fixture still asserts 30.
    **Cause:** the default was shortened in `#1188`; the unit test wasn't updated.
    **Fix:** point the assertion at the shared default so it can't drift again.
  </SlackMessage>
</SlackThread>

## What's really going on

Company Brain spins up an **isolated workspace**, checks out what it needs, runs the command, and reads the output. It's not guessing from static code alone — it's executing.

Guardrails are intentional, so it's safe to hand real tasks to:

- No `git push`, no deploys
- No elevated privileges (`sudo` and similar are blocked)
- No reaching arbitrary internal network addresses
- No long-running dev servers

Think of it as a sealed workbench: useful for reproduce / inspect / explain loops, not for shipping changes on your behalf.

<CardGroup cols={2}>
  <Card title="Acting in tools" icon="wrench" href="/company-brain/use-cases/acting-in-tools">
    When the next step is a Linear issue or a PR lookup.
  </Card>
  <Card title="What you can do" icon="sparkles" href="/company-brain/use-cases/overview">
    All the scenario walkthroughs.
  </Card>
</CardGroup>