# haileys/jsos

An operating system written in JavaScript

Repository: https://github.com/haileys/jsos
Canonical: https://ross.abutalabs.com/products/jsos
Language: C
License Family: other
Last push: 2024-04-29T12:02:42+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5318, "days_push": 856, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1038, forks 150 (observed 2026-08-28T04:03:19.698945+00:00)

## What it is
JSOS is a hobby operating system whose kernel, C library, compiler, and JavaScript virtual machine are written largely in JavaScript, with C components. It is an experimental OS development project demonstrating JavaScript as a systems language.

## Use cases
- run an operating system written in javascript
- study how to build a javascript vm for a kernel
- learn os development with a javascript userspace
- explore hobby operating system source code
- boot a minimal OS with a javascript interpreter

## When to choose
- you want to study or hack on an unconventional JavaScript-based OS
- you are learning OS development and want a small readable codebase
- you need a JavaScript VM running bare-metal as a reference

## When to avoid
- you need a production-ready operating system
- you require a permissive license for all components without review
- you need modern hardware support, drivers, or active development

## Facets
- artifact type: application
- maturity: maintenance
- function: interpreter, compiler, programming-language
- domain: operating-systems, programming-languages, developer-tools
- platform: cpp, c, cross-platform
- tags: operating-system, javascript-vm, osdev, hobby-os, kernel

## Member repositories
- haileys/jsos (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:19.698945+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:04:15.879859+00:00, confidence not recorded.
  - readme: https://github.com/haileys/jsos (fetched 2026-08-28T04:03:19.698945+00:00, sha 38edbfaa4106)
- Data as of 2026-08-30T08:39:29.467469+00:00.