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Show HN: Vivari – Open-Source WebContainer for Node, Bun, and Python

https://vivari.jamesisme.com
9•maitrungduc•2h ago

Comments

slicendice•51m ago
This is great! It reminds me of a more modern version of sandpack. Would love to see a roadmap for more upcoming features (hopefully support for svelte/vite/etc.).
maitrungduc•37m ago
Thank you, really appreciate it.

Good news on that front: Vite and Svelte already work today. The Studio ships templates for Svelte 5 (Vite) and SvelteKit, alongside React, Vue, Astro, Nuxt, Solid, Qwik, Preact and more, and Vite is the default dev server for most of the frontend templates. If you open the Studio you can boot a Svelte + Vite project right now.

The Sandpack comparison is fair, though the approach differs a bit. Sandpack's classic setup bundles in the browser, whereas Vivari runs a real Node (plus Bun and Python) runtime with a virtual filesystem and a process model, so the actual npm dev server runs in-VM instead of a bundler standing in for it. Closer in spirit to WebContainer or CodeSandbox's Nodebox.

On the roadmap: near term I'm focused on hardening what's already there (Next.js and Postgres via PGlite are still experimental), expanding Bun coverage beyond the current shim, and improving the debugger and git support. I'll put up a proper public roadmap soon. If there's a specific framework or workflow you'd want, I'd genuinely like to hear it.

7.1 Earthquake in Japan

https://www.data.jma.go.jp/multi/quake/quake_detail.html?eventID=20260728163528&lang=en
533•krembo•7h ago•100 comments

New HIV vaccine shows unprecedented success in preclinical study

https://www.lji.org/news-events/news/post/new-hiv-vaccine-shows-unprecedented-success-in-preclini...
166•codebyaditya•1h ago•58 comments

Show HN: tale.fyi, we deserve a home for fiction

https://tale.fyi/@sam/announcing-tale-fyi-read-or-listen-to-an-entire-book-from-a-single-link
41•samuelcole•1h ago•25 comments

Kimi Linear: An Expressive, Efficient Attention Architecture

https://arxiv.org/abs/2510.26692
78•ronfriedhaber•3h ago•15 comments

Show HN: Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code

https://github.com/schildep/verified-3d-mesh-intersection
51•permute•1h ago•17 comments

Solving Fermat: Andrew Wiles

https://www.pbs.org/wgbh/nova/proof/wiles.html
22•1970-01-01•18h ago•3 comments

Show HN: Ctrlb-decompose: Strip the noise from logs before sending to LLMs

https://github.com/ctrlb-hq/ctrlb-decompose
33•ruhani_grover•1h ago•7 comments

Google's Beyond Zero: Enterprise Security for the AI Era

https://spawn-queue.acm.org/doi/10.1145/3819083
74•jordigg•4h ago•40 comments

DMARC Has Been Public Since 2012. 68.4% of Domains Still Don't Enforce It

https://ciphercue.com/blog/dmarc-enforcement-gap-rua-fragmentation-2026
56•adulion•4h ago•38 comments

Our position on open-weights models

https://www.anthropic.com/news/position-open-weights-models
1067•surprisetalk•16h ago•1537 comments

How to Survive Boiling Water

https://taxa.substack.com/p/how-to-survive-boiling-water
207•cainxinth•4d ago•30 comments

About the security content of macOS Tahoe 26.6

https://support.apple.com/en-us/128067
151•andor•5h ago•94 comments

What AI developers could learn from Charles Bukowski?

https://galjot.si/what-ai-developers-could-learn-from-charles-bukowski
28•sedovsek•1h ago•21 comments

Fast Remediation Is the New Trust Model (JFrog and OpenAI Zero-Day Findings)

https://jfrog.com/blog/jfrog-and-openai-collaboration-on-zero-day-security-findings/
26•882542F3884314B•2h ago•10 comments

Show HN: Scala Tutorials – interactive Scala 3 lessons in the browser

https://scalatutorials.com
39•eranation•3d ago•6 comments

A $500 RL fine-tune of a 9B open model beat frontier models on catalog review

https://fermisense.com/when-machines-take-the-wheel/
261•ilreb•12h ago•87 comments

Mondragon Corporation – a federation of co-operatives

https://en.wikipedia.org/wiki/Mondragon_Corporation
94•brnt•2h ago•12 comments

Usenet Archive Toolkit – process Usenet messages into a searchable archive

https://github.com/wolfpld/usenetarchive
15•bilegeek•4h ago•0 comments

Benchmarking Opus 5 on SlopCodeBench

https://github.com/humanlayer/advanced-context-engineering-for-coding-agents/blob/main/benchmarki...
353•dhorthy•16h ago•97 comments

Dolmenwood: Fantasy RPG built around the acclaimed Old-School Essentials rules

https://necroticgnome.com/collections/dolmenwood
18•doener•3d ago•7 comments

The Origins of Modern Mathematics in Russia

https://valeman.medium.com/the-origins-of-modern-mathematics-in-russia-from-peter-the-great-to-th...
11•ibobev•3d ago•0 comments

Ask HN: Crooked Timber showed showed me a virus captcha, What now?

10•Jgoauh•24m ago•5 comments

Ars Astronomica – English translations of rare Hebrew and Latin astronomy texts

https://arsastronomica.com/
94•sweisman•9h ago•28 comments

Vehicle Motion Cues

https://support.apple.com/guide/iphone/iphone-comfortably-riding-a-vehicle-iph55564cb22/ios
170•Austin_Conlon•13h ago•86 comments

Watching Go's new garbage collector move through the heap

https://theconsensus.dev/p/2026/07/19/observing-gos-garbage-collector-old-and-new.html
251•matheusmoreira•3d ago•36 comments

Great Mobile Apps Aren't Built Around Features

https://geekyants.com/case-studies/nowmatch-next-gen-social-and-dating-app-development
3•steve_7890•1h ago•0 comments

PyTorch: A Reference Language

https://docs.pytorch.org/devlogs/compiler/2026-07-25-pytorch-a-reference-language/
60•matt_d•10h ago•5 comments

TWC Classics

https://twcclassics.com/
30•stefanpie•5d ago•3 comments

Show HN: Segue – Save context in one AI, load it in another by a short handle

https://segue.ai/
10•csaguiar•2h ago•5 comments

Kimi K3 Now Available via Telnyx Inference API

https://telnyx.com/release-notes/kimi-k3-telnyx-inference
119•fionaattelnyx•16h ago•69 comments