Perplexity Details SPACE Sandbox for Computer Agents
AravSrinivas · x · 2026-07-16
The Perplexity team introduced SPACE, a sandbox system built for their Computer agent.
Because a Computer session can last for days and needs to pause while waiting for user input, keeping the VM constantly online wastes massive amounts of memory and compute; however, relying solely on the file system for recovery would result in losing process and memory states. To solve this, they designed two types of snapshots:
- Disk snapshots: Run at high frequencies without pausing the VM, used to roll back file system changes.
- Full checkpoints: Generated at low frequencies when paused, capturing the complete VM state, including memory and processes.
When a session is suspended, the full checkpoint is uploaded to object storage, and the session is only marked as recoverable after all artifacts are flushed to disk. Afterward, any node can pull the file system increments and restore the session.
Related event: Perplexity Unveils SPACE, a Sandbox Built for Long-Running Agents(8 posts)→
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