# pilcrowonpaper/copenhagen

A basic guideline on implementing auth for the web

Repository: https://github.com/pilcrowonpaper/copenhagen
Canonical: https://ross.abutalabs.com/products/copenhagen
Homepage: https://thecopenhagenbook.com
License: MIT
License Family: permissive
Archived: true
Last push: 2026-06-03T08:09:26+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 85, release rhythm 35, longevity 66
- inputs: {"age_days": 932, "days_push": 91, "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 2119, forks 60 (observed 2026-08-28T04:06:16.456849+00:00)

## What it is
The Copenhagen Book is a free, open-source guideline on implementing authentication in web applications, maintained as a documentation site. It has been archived and replaced by auth.pilcrowonpaper.com.

## Use cases
- learn how to implement auth for the web
- understand session and cookie security best practices
- find guidance on password storage and hashing
- study common web authentication pitfalls
- supplement OWASP cheat sheets with practical auth advice

## When to choose
- you want a free, opinionated introduction to web authentication concepts
- you need a readable companion to the OWASP Cheat Sheet Series

## When to avoid
- you need an actively maintained resource - use the successor auth.pilcrowonpaper.com instead
- you need a library or tool rather than documentation

## Facets
- artifact type: learning-resource
- maturity: abandoned
- function: auth, security, documentation
- domain: security, web-development, tutorials
- platform: -
- tags: authentication, guide, book, owasp, archived, web-server

## Member repositories
- pilcrowonpaper/copenhagen (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:16.456849+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 2026-08-30T02:53:02.528201+00:00, confidence not recorded.
  - readme: https://github.com/pilcrowonpaper/copenhagen (fetched 2026-08-28T04:06:16.456849+00:00, sha 75859ef63c0f)
  - homepage: https://thecopenhagenbook.com (fetched 2026-08-29T10:33:29.390534+00:00, sha 0458327b6ac6)
- Data as of 2026-08-30T08:39:29.467469+00:00.