# google/lisp-koans

Common Lisp Koans is a language learning exercise in the same vein as the ruby koans, python koans and others.   It is a port of the prior koans with some modifications to highlight lisp-specific features.  Structured as ordered groups of broken unit tests, the project guides the learner progressively through many Common Lisp language features.

Repository: https://github.com/google/lisp-koans
Canonical: https://ross.abutalabs.com/products/lisp-koans
Language: Common Lisp
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2023-04-14T13:37:55+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4858, "days_push": 1237, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3193, forks 571 (observed 2026-08-28T04:07:48.233025+00:00)

## What it is
A collection of broken unit tests that guide learners progressively through Common Lisp language features, in the style of the Ruby and Python koans. Learners fix fill-in-the-blank asserts to advance through 198 koans across 31 lessons.

## Use cases
- learn common lisp
- practice lisp exercises
- learn a programming language by fixing failing tests
- lisp tutorial for beginners
- interactive language learning exercises
- teach myself common lisp

## When to choose
- you want a hands-on, test-driven introduction to Common Lisp
- you already know another language and want to pick up Lisp idioms
- you prefer learning by fixing code rather than reading docs

## When to avoid
- you need a Common Lisp reference manual or production library
- you are learning a language other than Common Lisp
- you want a GUI-based interactive course

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: testing, developer-tools
- domain: programming-languages, tutorials, education
- platform: windows, cli
- tags: common-lisp, koans, learn-to-code, exercises, test-driven-learning, linux, macos

## Member repositories
- google/lisp-koans (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:48.233025+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 2026-08-30T07:24:55.218837+00:00, confidence not recorded.
  - readme: https://github.com/google/lisp-koans (fetched 2026-08-28T04:07:48.233025+00:00, sha 8907b8f380ef)
- Data as of 2026-08-30T08:39:29.467469+00:00.