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Sandboxes

Every risky step in its own sealed machine.

When an AI agent runs code, a file is opened or a build runs, it happens in a throwaway machine with only the memory and network access it needs. When the step ends, the machine is gone. Every refusal is recorded, without anyone seeing the code.

A fresh machine for each stepNetwork only where allowedRefusals recorded
nexus · sandboxes · warm pools and nodesSample data
Machines kept warm so steps start quickly, node by node
Warm pools and nodes. Checking there is room to start sealed machines quickly, and draining one node.Sample data
Profiles

The right size, nothing more.

Profiles set the memory, time and network each kind of step may use. Each platform and domain pack is allowed only the profiles it needs.

Profiles

See the sizes and networks steps may run with, and who uses each.

  • Memory, time and network
  • Who uses each
  • Changed with approval
nexus · sandboxes · profilesSample data
Sandbox sizes and networks and who uses each
Profiles. The memory, time and network each kind of step may use.Sample data
Shadow, then enforce

Tried in shadow, then enforced.

New limits run in shadow first, showing what they would have stopped. Then they are enforced, one kind of step at a time.

  • Shadow mode first
  • Enforced step by step
  • Every change recorded
nexus · sandboxes · from shadow to enforceSample data
Moving limits from shadow to enforce
From shadow to enforce. Moving limits from shadow mode to enforcement, one kind of step at a time.Sample data
Competing drafts

Three drafts, three sealed machines.

When an AI agent fixes something, it can make several drafts, each in its own sandbox, and a person picks the one to keep.

  • Each draft isolated
  • Compared side by side
  • A person chooses
nexus · competing draftsSample data
Three drafts of a fix, each made in its own sandbox
Competing drafts. Picking one of three drafts of a fix, each made in its own sandbox.Sample data
Use and refusals

Who used what, without seeing the code.

See sandbox use and every refusal, by team and profile. Nobody sees the code that ran.

  • Use by team and profile
  • Every refusal listed
  • Code itself never shown
nexus · sandboxes · use and refusalsSample data
Who used sandboxes and every refusal
Use and refusals. Seeing who used sandboxes, and every refusal, without seeing any code.Sample data
Questions

About sandboxes.

What runs in a sandbox?

Code written by AI agents, files being opened, builds, tests and plugin steps. Anything that could do harm if it misbehaved.

Does it slow things down?

Machines are kept warm, so most steps start in well under a second.

Book a briefing

Run something risky, safely.

We will show an AI agent writing and running code inside a sandbox, and what happens when it tries to reach further.