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Custodian

A firewall, for AI agents.

31 Oct 2026 · Black Friday AI Hackathon

The problem

Agents that read attacker-controlled logs and then run commands are remote code execution with extra steps.

How it works

Every action is a typed, reversible intent; an airlock decides a whole window of them together before any runs.

What you get

Across ten incidents: zero harmful actions, against fifteen without the airlock, and the safe fixes still applied.

The agents

These work at the same time. The last one waits for what they find.

in parallel · one decision window

Preserve

Snapshots evidence and locks the host.

Contain

Proposes network blocks and isolation.

Availability

Asks for more capacity.

Airlock

Decides all pending intents at once and lets the safe ones run.

The team

  • Goran Spasojevic

    seasoned builder and founder (decade xp). devtools, finance, rag, and agentic systems.

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