Accessibility Enforcer Protocol

Accessibility (a11y) on mobile is not a nice-to-have; it's a legal and moral requirement. A screen reader user should be able to navigate, understand, and interact with the app as easily as a sighted user. This skill acts as an automated a11y auditor.

Core principle: If VoiceOver or TalkBack can't read it, the button doesn't exist for that user.

Workflow

1. Identify the UI component / interaction pattern
2. Analyze for specific platform screen reader requirements
3. Check WCAG contrast and touch target sizes
4. Recommend code-level implementations

Step 1: Component Identification

Identify the elements being used:

• Core UI (Buttons, Images, TextInputs)
• Complex UI (Modals, Carousels, Custom Drawers)
• State changes (Loading spinners, Error messages)

Step 2: Screen Reader Analysis

Screen readers need three things from an element:

1. Focusability: Can the user navigate to it?
2. Label: What is it called? (e.g., "Submit")
3. Role/Trait: What does it do? (e.g., "Button")
4. State: Is it active? (e.g., "Selected", "Disabled")

Check for missing accessibilityLabel (iOS/React Native) or contentDescription (Android) on interactive non-text elements (like icon-only buttons).

Step 3: Interaction & Visual Checks

• Touch Target Size: Minimum 44x44pt (iOS) or 48x48dp (Android).
• Color Contrast: WCAG AA requires 4.5:1 for normal text and 3:1 for large text/icons.
• Focus Order: Does the reading order make logical sense? Does a modal trap focus so the screen reader doesn't read the background?

Step 4: Implementation Recommendation

Provide exact code snippets for the specific platform to fix the identified issues.

Output Format

# ♿ Accessibility Audit Report

**Component / View:** [e.g., Custom Icon Button Navbar]

## 🚨 Critical VoiceOver/TalkBack Issues
*Issues blocking screen reader users from using the feature.*

1. **[Issue Name]** (e.g., Unlabeled Icon Button)
   - **Problem:** [E.g., The search icon button has no label. VoiceOver will just read "Button", leaving the user confused.]
   - **Fix:** [Give the exact code fix, such as adding `accessibilityLabel="Search"` and `accessibilityRole="button"`.]

## ⚠️ UX / Interaction Warnings
*Issues failing WCAG but not completely broken.*

1. **[Warning Area]** (e.g., Touch Target Too Small)
   - **Problem:** [Explanation]
   - **Mitigation:** [Solution, e.g., Add `hitSlop` to increase the touchable area without visually changing the design.]

## 💡 Code Implementation

```javascript/swift/kotlin
// Before (Inaccessible):
<TouchableOpacity onPress={search}>
   <Icon name="search" />
</TouchableOpacity>

// After (Accessible):
<TouchableOpacity 
   onPress={search}
   accessibilityRole="button"
   accessibilityState={{disabled: false}}
   accessibilityLabel="Search"
   accessibilityHint="Opens the search bar to find users"
   hitSlop={{top: 10, bottom: 10, left: 10, right: 10}}
>
   <Icon name="search" />
</TouchableOpacity>
```

When to Skip

• The task is entirely backend logic or database schema design.

Guardrails

• Beware Redundant Data: Never tell a dev to add the word "button" into the accessibilityLabel (e.g., "Search Button"). The screen reader will announce "Search Button Button" because of the element's trait.
• Hide Decorative Images: Explicitly instruct devs to hide purely decorative images from screen readers (importantForAccessibility="no" or accessible={false}).
• Dynamic Text Warning: Ensure custom fonts scale properly when the user increases the system font size (Dynamic Type on iOS).

References

See references/EXAMPLES.md for a worked case.

🔗 Next Steps & Handoffs

Ecosystem: @ecosystem-mobile — Mobile App Domain.

Workflows:

• Pre-Release Audit Flow (mobile-pre-release-audit, step 1 of 3): last step → once it passes, complete the workflow and report the outcome.

Handoff contract: pass results to the next skill through an inline Handoff block in your reply with the fields skill, workflow, created_at, inputs, summary, and next (the handoff contract of @ecosystem-mobile). If a next skill is not installed, continue with its step from the ecosystem map, or install it with npx skills add fatih-developer/fth-skills --skill <name> after the user agrees.