# wcagfail.patternd.io

> WCAG 2.2 failure specimen corpus: one intentional failure per URL, conforming chrome, and a machine-readable catalog plus per-specimen contracts. 119 specimens; A+AA coverage 55/55.

Agents should use the JSON surfaces below, not bulk HTML scraping.

- Start with [catalog.json](https://wcagfail.patternd.io/catalog.json): ids, canonical urls, success criteria, and automatable flags.
- Fetch each specimen contract at `{specimenUrl}meta.json` (append `meta.json` to the catalog `url`, do not rebuild paths from `id`).
- Only `#specimen` is intentionally non-conformant. A `missed` scoreboard outcome describes the scanner adapter, not a defective specimen.

## Core

- [Catalog](https://wcagfail.patternd.io/catalog.json): specimen index for crawlers and tools
- [Sitemap](https://wcagfail.patternd.io/sitemap.xml): all published URLs
- [Home](https://wcagfail.patternd.io/): coverage summary and criterion tables

## Documentation

- [Agents](https://wcagfail.patternd.io/llms/agents.md): how to change the system
- [Context](https://wcagfail.patternd.io/llms/context.md): domain language
- [Conformance](https://wcagfail.patternd.io/llms/conformance.md): scanner contract and detection outcomes
- [ID scheme](https://wcagfail.patternd.io/llms/id-scheme.md): rule prefixes, variants, and pair members
- [README](https://wcagfail.patternd.io/llms/readme.md): install, build, and deploy workflow

## Specimens

Each specimen page has a sibling `meta.json` with the full ledger record and contract (`expectedFindings`, `mustNotFlag`, `scanScope`, `versions`).

- [F3 meta.json](https://wcagfail.patternd.io/specimens/F3/meta.json): canonical W3C failure technique with further case variants
- [SC-2.5.8 meta.json](https://wcagfail.patternd.io/specimens/SC-2.5.8/meta.json): synthetic specimen for a WCAG 2.2-only criterion
- [F77 meta.json](https://wcagfail.patternd.io/specimens/F77/meta.json): obsolete 4.1.1 parsing failure (applies to WCAG 2.0 and 2.1 only)

## Optional

- [WCAG 2.2 Quick Reference](https://www.w3.org/WAI/WCAG22/quickref/): normative success criteria