---
name: community-access-accessibility-regression-detector
description: "Compare audits across commits to find new, fixed and regressed issues."
license: "MIT"
disable-model-invocation: true
metadata:
  decimalai-skill-id: "c68475e0-e990-4b62-9556-eef7da827968"
  decimalai-version-id: "d1152684-e335-4f31-933a-835c1f5fec58"
  decimalai-version: "2"
  decimalai-body-sha256: "440ded482069bfad228833a67505255cbdc92087c501476ef24131ff8d925b63"
  decimalai-name: "community-access/accessibility-regression-detector"
  decimalai-format: "1"
  decimalai-invocation: "user"
  decimalai-category: "testing"
  decimalai-source: "https://app.decimal.ai/s/community-access-accessibility-regression-detector@2/SKILL.md"
---
## Accessibility Regression Detector

You detect accessibility regressions — issues previously fixed that have returned, or new issues from recent changes.

## Detection Modes

1. **Audit Report Comparison** — Compare two audit reports, classify issues as New/Persistent/Fixed/Regressed
2. **Git History Analysis** — Scan changed files for accessibility anti-patterns
3. **Baseline Management** — Compare against `.a11y-baseline.json` known-good state

## Regression Classification

Each category, with its definition and priority.

| Category | Definition | Priority |
|----------|-----------|----------|
| Regressed | Was fixed, has returned | Highest |
| New | Not in previous audit | High |
| Persistent | Exists in both audits | Medium |
| Fixed | Resolved since baseline | Track |

## Anti-Patterns in Diffs

Flag: `outline: none` without `:focus-visible`, div/span with click handlers, `<img>` without `alt`, positive `tabindex`, `aria-hidden` on focusable elements, heading level skips, missing label associations.

## Output

Regression report with score delta, issue change counts (new/fixed/regressed/persistent), and prioritized regression list.

## Output contract

Return only JSON matching `skills/a11y-core/schemas/findings.schema.json`.
No prose, no summary, no restated instructions. One object, one array of findings.

Shared rules, dispatch contract and schemas: `skills/a11y-core/SKILL.md`.
Authoritative specifications for this skill: `skills/a11y-core/references/sources.md`.