Isolation by construction: how a company of agents stays safe

The first question anyone serious asks about autonomous software is: what happens when it gets something wrong? The honest answer is that it will, sometimes — so the architecture has to assume it. Aria's answer is isolation by construction: every track of work runs in its own sandbox, with its own filesystem, its own process space, and no implicit reach into anything else.

Blast radius is a design decision

When a build fans out across many agents, the risk is not any single mistake — it is a mistake that spreads. We bound the blast radius up front. An agent working on the checkout flow cannot touch the analytics pipeline's files; a failed track is rolled back without dragging its neighbors down with it.

• Per-track sandboxes: filesystem and process isolation by default.
• No ambient authority — capabilities are granted, never assumed.
• Failures contain to their track and roll back cleanly.
• Review gates sit between build and anything that touches production.

Why this unlocks parallelism

Isolation is not just a safety story — it is what makes the parallelism trustworthy. Because tracks cannot interfere, the company can run six of them at once without holding its breath. The same property that contains failures is the one that lets the work go fast.