June 5th, 2026
Sandboxes now have a dedicated workspace on disk.
What's new: — Upload files once via POST /files — Exec by filename — no code in the request body — Workspace persists between runs — Zero config locally, overridable via PETRI_WORKSPACE_ROOT
The foundation for delta sync and auto dependency detection.
Full write-up: https://dev.to/thearun85/the-case-for-persistent-sandboxes-in-ai-code-execution-3158
June 4th, 2026
Petri is live. The core execution engine that powers Jhansi.io.
Create isolated sandboxes via REST API
Run Python, Go, and Node.js code safely in Docker containers
Sandbox registry with domain exceptions
Multi-language support via single exec endpoint
Full test suite with dependency injection
The foundation is solid. v0.2 brings persistent workspaces — upload files once, run many times.