# ashinn/chibi-scheme

Official chibi-scheme repository

Repository: https://github.com/ashinn/chibi-scheme
Canonical: https://ross.abutalabs.com/products/chibi-scheme
Language: Scheme
License: NOASSERTION
License Family: other
Last push: 2026-08-23T02:00:57+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 43, longevity 100
- inputs: {"age_days": 4188, "days_push": 11, "days_rel": 168, "gap_med": 502, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1390, forks 159 (observed 2026-08-28T04:04:35.578805+00:00)

## What it is
Chibi-Scheme is a minimal Scheme implementation designed to be embedded as an extension and scripting language in C programs. It supports R7RS-small, lightweight VM-based threads, multiple isolated VMs per process, and has no external dependencies.

## Use cases
- embed a scripting language in a C application
- add a small Scheme interpreter to a game or tool
- run multiple isolated script VMs in different OS threads
- experiment with R7RS-small Scheme
- run Scheme in the browser via Emscripten
- script mobile apps on iOS or Android

## When to choose
- you need a tiny, dependency-free scripting engine for a C project
- you want standards-compliant R7RS-small Scheme
- you need multiple isolated interpreter instances or lightweight threads
- you target constrained or unusual platforms like Plan 9 or Emscripten

## When to avoid
- you need maximum runtime performance for compute-heavy workloads
- you want a large ecosystem of third-party libraries
- you need a general-purpose standalone scripting language like Python or Lua with batteries included

## Facets
- artifact type: library
- maturity: stable
- function: interpreter, programming-language, embedded
- domain: programming-languages, developer-tools, embedded-systems
- platform: windows, bsd, cross-platform, wasm, c
- tags: scheme, r7rs, extension-language, scripting, small-footprint, vm, linux, macos, android, ios

## Member repositories
- ashinn/chibi-scheme (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:35.578805+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 2026-08-30T04:39:38.512275+00:00, confidence not recorded.
  - readme: https://github.com/ashinn/chibi-scheme (fetched 2026-08-28T04:04:35.578805+00:00, sha 630032ddfc0b)
- Data as of 2026-08-30T08:39:29.467469+00:00.