# Khan/perseus

Perseus is Khan Academy's exercise question editor and renderer.

Repository: https://github.com/Khan/perseus
Canonical: https://ross.abutalabs.com/products/khan-perseus
Homepage: https://khan.github.io/perseus/
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-08-26T19:42:23+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 4968, "days_push": 7, "days_rel": 9, "gap_med": 0.0, "n_releases_24m": 1583}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1584, forks 371 (observed 2026-08-28T04:05:07.347718+00:00)

## What it is
Perseus is Khan Academy's open-source exercise system for rendering, interacting with, and grading interactive educational questions. It ships as multiple npm packages from a TypeScript monorepo.

## Use cases
- render interactive math exercises on a learning website
- build a question editor for educational content
- grade learner answers to structured problems
- embed interactive widgets like graphs and input fields in lessons
- author exercises in the Perseus JSON format

## When to choose
- you need interactive, gradable exercise questions for an education platform
- you want Khan Academy's battle-tested exercise rendering system
- you need a component library for building learning assessments

## When to avoid
- you need a general-purpose quiz tool with no custom development
- your project is not JavaScript/TypeScript based
- you want a turnkey LMS rather than a rendering library

## Facets
- artifact type: library
- maturity: active
- function: ui-components, form-handling, templating
- domain: education, web-development, frontend
- platform: browser
- tags: exercise-renderer, interactive-questions, khan-academy, grading, react-components, monorepo, web-server, nodejs

## Member repositories
- Khan/perseus (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:07.347718+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 2026-08-30T03:55:53.348487+00:00, confidence not recorded.
  - readme: https://github.com/Khan/perseus (fetched 2026-08-28T04:05:07.347718+00:00, sha c8c2961d6bd1)
  - homepage: https://khan.github.io/perseus/ (fetched 2026-08-29T11:26:27.038552+00:00, sha e2fbed70c055)
- Data as of 2026-08-30T08:39:29.467469+00:00.