testland/wcag-compliance-reporter

Builds a per-page WCAG 2.2 compliance score report by aggregating output from one or more accessibility scanners (axe-core / pa11y / lighthouse / WAVE / IBM Equal Access), pivoting violations by Success Criterion (1.4.3 contrast, 2.4.7 focus visible, etc.), grouping by conformance level (A / AA / AAA), reporting per-page coverage gaps explicitly (the "this page wasn't scanned" failure mode), and emitting both an executive summary and a per-page drill-down. Use after a multi-page accessibility scan - pa11y-ci, axe across a sitemap, lighthouse-batch - when the team needs a shareable conformance report rather than a per-page tool dump.

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Per-tool normalizers and the SC mapping

Name: testland/wcag-compliance-reporter
Rating: 80 (1 reviews)
Author: testland

Deep reference for wcag-compliance-reporter SKILL.md. Consult when writing or updating a per-tool normalizer; SKILL.md Step 1 keeps only the Violation contract and the concept and points here for the implementation.

Each scanner tags violations with its own WCAG hints, so each tool needs a small normalizer that maps its native rule IDs to a WCAG Success Criterion. The mapping is curated upstream:

axe-core ships tags like wcag2a, wcag143.
pa11y ships codes like WCAG2AA.Principle1.Guideline1_4.1_4_3.
Lighthouse uses an internal mapping documented in its audit catalog.

Worked normalizer - axe-core

# scripts/normalize_axe.py
def normalize_axe(json_blob, page_url):
    out = []
    for violation in json_blob.get('violations', []):
        sc = sc_from_axe_tags(violation['tags'])  # e.g. "1.4.3"
        if not sc: continue
        for node in violation['nodes']:
            out.append({
                'page': page_url,
                'successCriterion': sc,
                'level': level_from_sc(sc),       # "1.4.3" → "AA"
                'ruleId': violation['id'],
                'selector': ' '.join(node['target']),
                'message': violation['help'],
                'helpUrl': violation['helpUrl'],
                'scanner': 'axe',
            })
    return out

The central SC mapping

A single sc-mapping.json file holds rule-to-SC for every tool the report consumes. Update it whenever a tool's rule catalog changes so a renamed or newly-added rule keeps resolving to the right Success Criterion; a stale mapping silently drops violations that no longer match a known rule ID.