froggey/Mezzano
An operating system written in Common Lisp observed · 2026-08-28
Health v2 · maintenance only
67/100
- Activity 98
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4236
- days_rel: n/a
- days_push: 17
- n_releases_24m: 0
Adoption not part of the score
3887 stars · 203 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Mezzano is an operating system written entirely in Common Lisp, featuring its own compiler, GUI, networking stack, and file system support. It runs on x86-64 hardware and in emulators like VirtualBox and QEMU, with experimental AArch64 support.
Use cases
- run a full operating system written in Common Lisp
- experiment with a Lisp-based OS in QEMU or VirtualBox
- study OS internals implemented in a high-level language
- explore a live image with built-in editor, compiler, and REPL
- test SMP, networking, and filesystem support in a Lisp OS
- hack on an operating system kernel from within itself
When to choose
- you want to use or study a complete OS built in Common Lisp
- you're interested in Lisp machines and image-based development
- you want a self-hosting environment with compiler, editor, and introspection tools
- you're doing research or education on OS design with a high-level language
When to avoid
- you need a production OS with broad hardware support
- you need guaranteed driver support for specific hardware
- you need a stable, supported platform for daily use
- you're not comfortable digging into source code to get things working
Facets
application · maturity active
interpreter compiler gui networking file-system operating-systems programming-languages developer-tools cpp cross-platform common-lisp operating-system lisp-machine x86-64 research-os
1 source
- readme: https://github.com/froggey/Mezzano · fetched 2026-08-28 · ba278e42c68f
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| froggey/Mezzano | main | 67 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem