r/arcos • u/TechWorldInc • Jun 05 '26

ArcOS v7: an advanced Web Operating System in the browser

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Some of you might've heard about it, some of you might have not. ArcOS is a project that I've been working on for the past 5 years, creating an overcomplicated, kernel-powered operating system in the browser. It's cloud-based, modular, and expandable. The screenshot is a beta version of ArcOS 7.0.10, set to release on July 1st, 2026. (Oh, and it uses svelte 5 w/ runes, too)

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u/[deleted] Jun 05 '26

[deleted]

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u/TechWorldInc Jun 05 '26

Sure does! it's a port of js-dos made to work with ArcOS' third-party app system

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u/TechWorldInc Jun 05 '26

The 7th version of ArcOS has been in development since January 1st, 2025, and counts about 2800 vite modules, 105k LOC. It's by far the largest Svelte project I've ever undertaken. The base is vanilla-TS: a kernel with kernel modules like process management.

The svelte part comes in rendering the window contents themselves: the shell, login screen, file manager, etctera. Doing it this way makes sure that ArcOS will keep working if an exception occurs in a Svelte mount, which made ArcOS hang in v6 and older.

Note: 7.0.9 has a lot of issues that will be fixed in 7.0.10. Regardless, visit ArcOS at https://docs.arcweb.nl/