# jezen/is-thirteen

Check if a number is equal to 13.

Repository: https://github.com/jezen/is-thirteen
Canonical: https://ross.abutalabs.com/products/is-thirteen
Language: JavaScript
License Family: other
Last push: 2026-01-29T13:44:33+00:00

## Health v2 (maintenance only)
Score: 61/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 64, release rhythm 35, longevity 100
- inputs: {"age_days": 3815, "days_push": 216, "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 6181, forks 495 (observed 2026-08-28T04:09:38.457300+00:00)

## What it is
A novelty npm package that checks whether a number is equal to 13, with a fluent API for approximate comparisons and arithmetic. It is a well-known joke library popular in the JavaScript community.

## Use cases
- check if a number is 13 in javascript
- joke npm package for fun demos
- fluent number comparison example
- teaching unit testing with a simple library

## When to choose
- you want a humorous dependency for a demo or talk
- you need a trivial example package for teaching npm or testing

## When to avoid
- any production codebase
- serious numeric comparison logic

## Facets
- artifact type: library
- maturity: stable
- function: developer-tools
- domain: developer-tools, programming-languages
- platform: -
- tags: novelty, joke-package, npm, utility, nodejs, javascript

## Member repositories
- jezen/is-thirteen (main) score 61

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:38.457300+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 2026-08-29T17:47:24.856317+00:00, confidence not recorded.
  - readme: https://github.com/jezen/is-thirteen (fetched 2026-08-28T04:09:38.457300+00:00, sha da713baa76a7)
  - registry_npm: https://registry.npmjs.org/is-thirteen (fetched 2026-08-29T08:44:17.512960+00:00, sha 44d29da935b2)
- Data as of 2026-08-30T08:39:29.467469+00:00.