# clasp-developers/clasp

clasp Common Lisp environment

Repository: https://github.com/clasp-developers/clasp
Canonical: https://ross.abutalabs.com/products/clasp-developers-clasp
Homepage: https://clasp-developers.github.io/
Language: Common Lisp
License Family: other
Topics: common-lisp, compiler, lisp
Last push: 2026-08-24T19:40:08+00:00

## Health v2 (maintenance only)
Score: 85/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 58, longevity 100
- inputs: {"age_days": 4488, "days_push": 9, "days_rel": 70, "gap_med": 259.0, "n_releases_24m": 3}
- 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 2782, forks 155 (observed 2026-08-28T04:07:21.773043+00:00)

## What it is
Clasp is a Common Lisp implementation that compiles to native code via LLVM and seamlessly interoperates with C++ libraries and programs. It supports the standard Common Lisp ecosystem (SLIME, ASDF, Quicklisp, CFFI) and targets scientific computing use cases.

## Use cases
- implement a common lisp environment
- call c++ libraries from lisp
- rapid prototyping with lisp and native code
- scientific computing with common lisp
- compile lisp to native code with llvm

## When to choose
- you need Common Lisp with tight C++ interop
- you want LLVM-based native code compilation for Lisp
- you're doing scientific computing and want Lisp's incremental development

## When to avoid
- you need a mainstream, widely-supported Lisp implementation like SBCL
- you need Windows support
- you can't afford heavy build requirements (8+ GB RAM, long compile times)

## Facets
- artifact type: library
- maturity: active
- function: compiler, interpreter, programming-language, developer-tools
- domain: programming-languages, compilers, developer-tools, data-science
- platform: bsd, cpp
- tags: common-lisp, llvm, c++-interop, lisp-implementation, scientific-computing, linux, macos

## Member repositories
- clasp-developers/clasp (main) score 85

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:21.773043+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 2026-08-30T08:16:04.918894+00:00, confidence not recorded.
  - readme: https://github.com/clasp-developers/clasp (fetched 2026-08-28T04:07:21.773043+00:00, sha 924a519b8ac7)
  - homepage: https://clasp-developers.github.io/ (fetched 2026-08-29T09:55:18.361888+00:00, sha 060f8f05f524)
- Data as of 2026-08-30T08:39:29.467469+00:00.