Weights: Critical (confirmed, all three sources): -18 points Critical (high confidence, both sources): -15 points Critical (high confidence, single source): -10 points Critical (medium confidence): -7 points Critical (low confidence): -3 points Serious (high confidence): -7 points Serious (medium confidence): -5 points Serious (low confidence): -2 points Moderate (high confidence): -3 points Moderate (medium confidence): -2 points Moderate (low confidence): -1 point Minor: -1 point

Floor: 0 (minimum score)


## Score Grades

| Score | Grade | Meaning |
|-------|-------|---------|
| 90-100 | A | Excellent - minor or no issues, meets WCAG AA |
| 75-89 | B | Good - some issues, mostly meets WCAG AA |
| 50-74 | C | Needs Work - multiple issues, partial WCAG AA compliance |
| 25-49 | D | Poor - significant accessibility barriers |
| 0-24 | F | Failing - critical barriers, likely unusable with AT |

## Confidence Levels

| Level | Weight | When to Use |
|-------|--------|-------------|
| Confirmed | 120% | Validated by all three sources: axe-core + agent review + Playwright behavioral testing |
| High | 100% | Confirmed by axe-core + agent, or definitively structural (missing alt, no labels, no lang) |
| Medium | 70% | Found by one source, likely issue (heading edge cases, questionable ARIA, possible keyboard traps) |
| Low | 30% | Possible issue, needs human review (alt text quality, reading order, context-dependent link text) |

### Source Correlation

Issues found by both axe-core AND agent review are automatically upgraded to **high confidence** regardless of individual confidence ratings.

Issues found by all three sources (axe-core + agent review + Playwright behavioral testing) are upgraded to **confirmed confidence** with a 1.2x weight multiplier. This applies when:

- axe-core reports a violation
- Agent code review identifies the same issue
- Playwright behavioral scan confirms the issue at runtime (e.g., keyboard trap confirmed by actual Tab traversal, contrast failure confirmed by rendered CSS computation)

When Playwright is not available, the maximum achievable confidence remains **High (100%)**. The confirmed tier is additive — it never downgrades findings.

## Scorecard Format

### Single Page

```markdown
## Accessibility Score

| Metric | Value |
|--------|-------|
| Page | [URL] |
| Score | [0-100] |
| Grade | [A-F] |
| Critical | [count] |
| Serious | [count] |
| Moderate | [count] |
| Minor | [count] |

Multi-Page

## Accessibility Scorecard

| Page | Score | Grade | Critical | Serious | Moderate | Minor |
|------|-------|-------|----------|---------|----------|-------|
| / | 82 | B | 0 | 2 | 3 | 1 |
| /login | 91 | A | 0 | 0 | 2 | 1 |
| /dashboard | 45 | D | 2 | 4 | 3 | 2 |
| **Average** | **72.7** | **C** | **2** | **6** | **8** | **4** |

Cross-Page Pattern Classification

Pattern Type	Definition	Remediation ROI
Systemic	Same issue on every audited page	Highest - usually layout/nav, fix once
Template	Same issue on pages sharing a component	High - fix the shared component
Page-specific	Unique to one page	Normal - fix individually

Remediation Tracking

Change Classification

Status	Definition
Fixed	Issue was in previous report but no longer present
New	Issue not in previous report, appears now
Persistent	Issue remains from previous report
Regressed	Issue was previously fixed but has returned

Progress Metrics

Issue reduction: (fixed / previous_total) * 100
Score change: current_score - previous_score
Pages improved: count of pages with higher scores than previous audit
Trend: improving (score up 5+), stable (within 5), declining (score down 5+)

Issue Severity Categories

Critical

No keyboard access to essential functionality
Missing form labels on required fields
Images conveying critical information have no alt text
Color is the sole means of conveying information
Keyboard traps with no escape

Serious

Missing skip navigation
Poor heading hierarchy (skipped levels)
Focus not visible on interactive elements
Form errors not programmatically associated
Missing ARIA on custom widgets

Moderate

Redundant ARIA on semantic elements
Suboptimal heading structure (multiple H1s)
Missing autocomplete on identity fields
Links to new tabs without warning
Missing table captions

Minor

Redundant title attributes
Suboptimal button text
Missing landmark roles where semantic elements exist
Decorative images with non-empty alt text

web-severity-scoring

Web Severity Scoring

Severity Scoring Formula