# mntmn/interim

The Interim Operating System

Repository: https://github.com/mntmn/interim
Canonical: https://ross.abutalabs.com/products/interim
Language: C
License Family: other
Last push: 2021-06-11T16:41:45+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4207, "days_push": 1909, "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 1315, forks 56 (observed 2026-08-28T04:04:20.556255+00:00)

## What it is
Interim OS is a minimalist experimental operating system with a language-based kernel inspired by Lisp machines and Plan 9. It boots to a JIT-compiling Lisp REPL (Sledge) and exposes system resources as filesystems, running bare-metal on Raspberry Pi 2 and hosted on Linux, macOS, Windows, and Amiga OS.

## Use cases
- experiment with a lisp machine style operating system
- boot a custom OS bare metal on a raspberry pi
- explore everything-is-a-file system design
- run a jit lisp repl as a shell and editor
- study minimal operating system kernel design
- try an os where the shell is the editor is the compiler

## When to choose
- you want a hands-on research OS blending Lisp and Plan 9 concepts
- you need a bare-metal playground for Raspberry Pi 2
- you prefer keyboard-driven, minimalist computing environments

## When to avoid
- you need a production operating system with drivers and software ecosystem
- you require GPU, networking, or mouse support
- you want a maintained project with active releases

## Facets
- artifact type: application
- maturity: maintenance
- function: interpreter, compiler, programming-language, file-system, terminal-ui, editor
- domain: operating-systems, programming-languages, compilers, developer-tools
- platform: windows, cpp, c, embedded
- tags: lisp-machine, bare-metal, raspberry-pi, jit-compiler, repl, plan9-inspired, minimalism, operating-system, linux, macos

## Member repositories
- mntmn/interim (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:20.556255+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 2026-08-30T04:48:42.118985+00:00, confidence not recorded.
  - readme: https://github.com/mntmn/interim (fetched 2026-08-28T04:04:20.556255+00:00, sha 52611bf1a3ad)
- Data as of 2026-08-30T08:39:29.467469+00:00.