--- title: Another Week, Another Vibe Coded OS; Closed-Source In... description: NULLos is an operating system built entirely from scratch, including its own UEFI bootloader, kernel, and a self-hosting-capable C compiler. While many vibe... canonical: https://daily.dev/posts/another-week-another-vibe-coded-os-closed-source-in-the-name-of-security-5rzxydl5r twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Another Week, Another Vibe Coded OS; Closed-Source In The Name Of Security | daily.dev og:description: NULLos is an operating system built entirely from scratch, including its own UEFI bootloader, kernel, and a self-hosting-capable C compiler. While many vibe... og:url: https://daily.dev/posts/another-week-another-vibe-coded-os-closed-source-in-the-name-of-security-5rzxydl5r og:image: https://api.daily.dev/og/posts/5rZXyDl5R.png og:image:alt: Another Week, Another Vibe Coded OS; Closed-Source In The Name Of Security og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Another Week, Another Vibe Coded OS; Closed-Source In The Name Of Security **[Phoronix](https://daily.dev/sources/phoronix)** · 1 min read · 0 upvotes · 0 comments ## Summary NULLos is an operating system built entirely from scratch, including its own UEFI bootloader, kernel, and a self-hosting-capable C compiler. While many vibe coded operating systems are open-source, NULLos is closed-source. Its single developer argues this is a security choice, saying one person who cannot be infiltrated beats a team from which code can leak or vulnerabilities can be found and exploited. The project is hosted at nullos.de. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is NULLos and how was it built? NULLos is an operating system built entirely from scratch, including its own UEFI bootloader, kernel, and a self-hosting-capable C compiler. It was developed predominantly through AI agents in a style sometimes called 'vibe coding'. Unlike most similar AI-built OS projects, which are open-source, NULLos is closed-source and maintained by a single developer, hosted at nullos.de. _Developers curious about AI-built operating systems can follow emerging vibe coding projects on daily.dev._ ### Why would a developer keep an AI-built operating system closed-source for security reasons? The NULLos developer argues that being a single person who cannot be infiltrated is safer than a team, from which code can leak or where vulnerabilities can be found and exploited before fixes ship. This reasoning positions closed-source, single-developer maintenance itself as a security control, rather than relying on open peer review. _Those debating open versus closed source security trade-offs can track this discussion on daily.dev._ ## Similar posts on daily.dev - [Trying A Vibe-Coded Operating System](https://daily.dev/posts/trying-a-vibe-coded-operating-system-hevdvydap) · Hackaday · 0 upvotes · 0 comments - [NostOS: the Nostalgia Operating System for the RC2014 retro/vintage computer](https://daily.dev/posts/nostos-the-nostalgia-operating-system-for-the-rc2014-retro-vintage-computer-9p2b4ddcu) · Adafruit Blog · 0 upvotes · 0 comments - [GitHub - roscopeco/anos: An operating system](https://daily.dev/posts/github---roscopeco-anos-an-operating-system-ivfxebsrz) · Hacker News · 1 upvotes · 0 comments - [Not Every Open Source OS Needs to Be Based on Linux, and These Six Aren’t](https://daily.dev/posts/not-every-open-source-os-needs-to-be-based-on-linux-and-these-six-aren-t-jdafoeixg) · It's Foss · 0 upvotes · 0 comments --- Tags: [#ai-coding](https://daily.dev/tags/ai-coding), [#vibe-coding](https://daily.dev/tags/vibe-coding) [View this post on daily.dev](https://daily.dev/posts/another-week-another-vibe-coded-os-closed-source-in-the-name-of-security-5rzxydl5r) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Another Week, Another Vibe Coded OS; Closed-Source In The Name Of Security","url":"https://daily.dev/posts/another-week-another-vibe-coded-os-closed-source-in-the-name-of-security-5rzxydl5r","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/another-week-another-vibe-coded-os-closed-source-in-the-name-of-security-5rzxydl5r"},"datePublished":"2026-10-30T12:31:20.773Z","dateModified":"2026-10-30T12:34:30.477Z","description":"NULLos is an operating system built entirely from scratch, including its own UEFI bootloader, kernel, and a self-hosting-capable C compiler. 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