# robert-strandh/SICL

A fresh implementation of Common Lisp

Repository: https://github.com/robert-strandh/SICL
Canonical: https://ross.abutalabs.com/products/sicl
Language: TeX
License: NOASSERTION
License Family: other
Last push: 2026-08-30T14:41:07+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 100, release rhythm 35, longevity 100
- inputs: {"age_days": 5061, "days_push": 3, "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 1147, forks 83 (observed 2026-09-01T02:14:06.341481+00:00)

## What it is
SICL is a fresh, modular implementation of the Common Lisp programming language. It is split into many implementation-independent, highly portable modules that other Common Lisp implementations can reuse instead of maintaining their own versions.

## Use cases
- implement a Common Lisp runtime from scratch
- reuse portable Common Lisp modules in another Lisp implementation
- study how a Common Lisp implementation is structured
- research programming language implementation techniques
- bootstrap a new Lisp compiler and runtime

## When to choose
- you need a modular, research-oriented Common Lisp implementation
- you want to borrow well-separated components like a reader or loop macro for your own implementation
- you are studying language implementation design

## When to avoid
- you need a production-grade, high-performance Common Lisp for daily work
- you want a mature implementation with long-term vendor support
- you need a simple out-of-the-box Lisp toolchain with minimal setup

## Facets
- artifact type: library
- maturity: experimental
- function: interpreter, compiler, programming-language
- domain: programming-languages, compilers, developer-tools
- platform: windows, cross-platform
- tags: common-lisp, lisp-implementation, modular-architecture, portable-modules, linux, macos

## Member repositories
- robert-strandh/SICL (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-09-01T02:14:06.341481+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 2026-08-30T08:22:58.435502+00:00, confidence not recorded.
  - readme: https://github.com/robert-strandh/SICL (fetched 2026-09-01T02:14:06.341481+00:00, sha 957ed612d685)
- Data as of 2026-08-30T08:39:29.467469+00:00.