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Running Python code in a sandbox with MicroPython and WASM

Running Python code in a sandbox with MicroPython and WASM 6th June 2026 I’ve been experimenting with different approaches to running code in a sandbox for several years now, but my latest attempt feels like it might finally have all of the characteristics I’ve been looking for. I’ve released it as an alpha package called micropython-wasm, and I’m using it for a code execution sandbox plugin for Datasette Agent called datasette-agent-micropython. - Why do I want a sandbox? -

Hacker News 4d ago

Self-hosted dev sandboxes with preview URLs (Docker, Go, no K8s)

The open-source engine for AI app-builder products. Give every user an isolated cloud dev environment, a built-in coding agent, and a live preview URL — self-hosted, on one machine, in one command. Think of the apps where you type "build me a todo app" and seconds later a working website appears at its own link — like Lovable, Bolt, v0, or Replit. sandboxed is the open-source backend that makes that possible, running on your own server.

Hacker News 7d ago

DeltaBox: Scaling Stateful AI Agents with Millisecond-Level Sandbox Checkpoint/Rollback

arXiv:2605.22781v2 Announce Type: replace Abstract: LLM-powered AI agents require high-frequency state exploration (e.g., test-time tree search and reinforcement learning), relying on rapid checkpoint and rollback (C/R) of the complete sandbox state, including files and process state (e.g., memory, contexts, etc.). Existing mechanisms duplicate the entire state, causing hundreds of milliseconds to seconds of latency per C/R, which severely bottlenecks deep search and large-scale fan-outs....

arXiv CS 1d ago

Show HN: Kyushu – A self-hostable WASM sandbox for JavaScript workers

A Self-Hostable Wasm Sandbox for JavaScript Workers Ever wanted to run a Cloudflare Workers-style handler, on a VPS or anywhere, without Node.js, Bun, or even Docker? Kyushu is an open source CLI that lets you write a JavaScript or TypeScript handler, build it into a self-contained WebAssembly binary, and run it anywhere with one command - kyu . No Node, Bun, or Docker - just a single binary - Cloudflare Workers-style API - familiar fetch handler - Self-hostable - runs on a VPS or anywhere -...

Hacker News 3d ago

AI Code Sandboxes: A Comparative Security Study. Part 1 of 2 -- Engine-Level Properties (Attack Surface, Leakage, Stackability, CVE History, Patch Cadence, Fuzzing)

arXiv:2606.08433v1 Announce Type: new Abstract: This paper reads six engine-level measurements together -- 1.1 host attack surface, 1.2 information leakage, 1.3 defense-in-depth stackability, 1.4 public CVE history, 1.5 patch cadence, and 1.6 upstream fuzzing posture -- to describe how five AI-sandbox products isolate guest code from the host kernel. No single axis is a sufficient basis for a comparative judgement; the cross-axis reading is the load-bearing analysis. Three high-level...

arXiv CS 1d ago

Bathtubs, Boundaries, and Sandboxes: AI Regulatory Learning under Legal Uncertainty

arXiv:2601.04094v3 Announce Type: replace Abstract: Effective regulation of AI is a defining policy challenge, driven by their integration into all aspects of society. To remain responsive to their rapid development and emergent properties, policymakers across the globe rely on high-level principles and abstract legal requirements. Yet, while this flexibility supports future-proofing human-centred regulations and aligning them with socio-ethical values, it also causes legal uncertainty...

arXiv CS 1d ago

Securing the Sandbox: A Rootless Containerized Framework for Process-Oriented Monitoring in Computer Graphics Education

arXiv:2606.05929v1 Announce Type: new Abstract: Computer Science education fundamentally depends on intensive laboratory hours to foster true programming mastery and logical reasoning. However, the widespread adoption of Generative Artificial Intelligence (AI) has made it virtually impossible to distinguish authentic student effort from instant AI code synthesis by evaluating final submissions alone. To preserve pedagogical integrity, educators must enforce authentic coding discipline,...

arXiv CS 5d ago

Zeroserve: A zero-config web server you can script with eBPF

zeroserve is a small, fast, zero-config HTTPS server. You hand it a tarball of a website and it serves it - over HTTP/2 and TLS 1.3, with hot reload and a tiny resident footprint. The twist is that you can drop eBPF programs into the tarball and they run on every request, in userspace, as sandboxed middleware - rewriting, authenticating, and rate-limiting requests, or reverse-proxying them to a backend when you want it to act as a gateway in front of your app.

Hacker News 4d ago

Show HN: TakoVM – Isolated model and tool execution used by enterprises

Run untrusted Python safely. Job queues and Docker isolation built-in. Run AI-generated code in isolated Docker containers with optional gVisor sandboxing.

Hacker News 3d ago

Synthetic Hallucinations, Real Gains: Hard Negatives from Frontier Models for FIM Hallucination Mitigation

arXiv:2606.03130v1 Announce Type: new Abstract: Small open-source code models that power IDE autocomplete still emit hallucinated Fill-in-the-Middle (FIM) completions: syntactically natural calls to methods, parameters, variables, and imports that do not exist in the surrounding project. Existing mitigations either require per-language execution sandboxes that do not apply at mid-keystroke or preference-optimisation pipelines that need large human-labelled corpora.

arXiv CS 7d ago