# maestro-os/maestro

Lightweight, Linux-compatible kernel, written in Rust to leverage the safety of the typesystem. Aiming to remove as much legacy as possible while supporting most usecases

Repository: https://github.com/maestro-os/maestro
Canonical: https://ross.abutalabs.com/products/maestro-os-maestro
Homepage: https://blog.lenot.re
Language: Rust
License: AGPL-3.0
License Family: copyleft
Topics: kernel, rust, unix, lightweight, operating-system, posix, x86-64, os
Last push: 2026-08-23T20:32:22+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2103, "days_push": 10, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3327, forks 111 (observed 2026-08-28T04:07:56.436308+00:00)

## What it is
Maestro is a lightweight Unix-like kernel and operating system written from scratch in Rust, aiming for Linux syscall compatibility while leveraging Rust's type system for memory safety. It is in early-stage development, supporting x86_64 and x86 with AArch64 planned, and explicitly not production-ready.

## Use cases
- run a lightweight Linux-compatible kernel written in Rust
- study how to write an OS kernel in Rust from scratch
- experiment with a POSIX-like kernel with kernel modules
- explore memory management like buddy allocators and copy-on-write in a real kernel
- follow operating system development in Rust
- test Linux syscall compatibility on a small kernel

## When to choose
- you want a small, Rust-based Unix-like kernel to learn from or contribute to
- you need a Linux-compatible kernel that strips away legacy code
- you are researching memory-safe kernel design

## When to avoid
- you need a production-ready OS - the project is explicitly unstable and incomplete
- you need full Linux syscall coverage - only roughly 30% is implemented
- you need AArch64 support - it is planned but not yet available

## Facets
- artifact type: application
- maturity: experimental
- function: concurrency, file-system
- domain: operating-systems, embedded-systems, developer-tools
- platform: rust, cpp
- tags: rust-kernel, unix-like, posix, osdev, linux-compatible, lightweight-kernel, aarch64-planned, operating-system, kernel, memory-management, driver, linux, x86-64

## Member repositories
- maestro-os/maestro (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:56.436308+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 2026-08-29T18:41:45.817669+00:00, confidence not recorded.
  - readme: https://github.com/maestro-os/maestro (fetched 2026-08-28T04:07:56.436308+00:00, sha 91828116f718)
  - homepage: https://blog.lenot.re (fetched 2026-08-29T09:34:41.344155+00:00, sha 3a22f58a0a65)
- Data as of 2026-08-30T08:39:29.467469+00:00.