pr-screenshot-docs

PR Screenshot Documentation

Guidance for capturing and documenting UI changes with before/after screenshots when creating pull requests.

When to Use This Skill

• Creating PRs with frontend/UI modifications
• Documenting visual changes for code review
• Building a visual record of design evolution
• Enabling async design review without running the app

Screenshot Workflow

1. Before Making Changes

Capture the current state before implementing UI modifications:

1. browser_resize(width: 320, height: 568)  # Mobile-first
2. browser_navigate to the target page
3. browser_snapshot to identify elements
4. browser_take_screenshot(element: "Target component", ref: "E123")

Save or note the screenshot for later comparison.

2. After Implementing Changes

Capture the same view after your modifications:

1. Refresh or navigate to the updated page
2. browser_snapshot to get updated refs
3. browser_take_screenshot(element: "Target component", ref: "E123")

3. Upload Screenshots (Optional)

For persistent URLs in PR descriptions, upload to an image hosting service:

# Using curl with 0x0.st (ephemeral hosting)
curl -F '[email protected]' https://0x0.st

# Or use project-specific image storage

Note: 0x0.st URLs expire. For permanent records, use GitHub's drag-and-drop image upload in PR descriptions or project documentation storage.

PR Description Template

Include a visual comparison section in your PR description:

## Visual Changes

| Before | After |
|--------|-------|
| ![Before](url-or-path) | ![After](url-or-path) |

### What Changed
- [Specific visual change 1]
- [Specific visual change 2]

Viewport Recommendations

Choose viewport size based on what you're documenting:

Target	Width	Height	Use Case
Mobile	320	568	Mobile-first responsive
Tablet	768	1024	Tablet layouts
Desktop	1280	800	Standard desktop
Wide	1440	900	Wide desktop layouts

Default to mobile (320px) for documentation - if it looks good on mobile, it usually scales up well.

Best Practices

Capture Strategy

• Focus on the changed component - don't capture full pages unless layout changed
• Use consistent viewports - same size for before and after
• Capture interactive states - hover, focus, active when relevant
• Include error states - if you changed error handling UI

Documentation Quality

• Describe what changed - don't make reviewers guess
• Explain why - connect visual changes to user benefit
• Note accessibility - mention contrast, focus indicators if relevant

When NOT to Capture

• Pure backend changes with no UI impact
• Code refactoring without visual changes
• Test-only changes
• Configuration updates

Integration with PR Workflow

This skill complements the /create-pr command. Before creating a PR with UI changes:

1. Take before screenshots (if you didn't already)
2. Implement your changes
3. Take after screenshots
4. Include comparison in PR description
5. Run the create-pr command

Example PR Section

## Visual Changes

| Before | After |
|--------|-------|
| ![Before - Button styling](./docs/screenshots/button-before.png) | ![After - Button styling](./docs/screenshots/button-after.png) |

### Changes Made
- Increased button padding from 8px to 12px for better touch targets
- Added subtle shadow for depth
- Improved contrast ratio from 3.5:1 to 4.8:1 (now WCAG AA compliant)

### Tested Viewports
- [x] Mobile (320px)
- [x] Tablet (768px)
- [x] Desktop (1280px)

Related Tools

• visual-validator agent - For rigorous visual QA after changes
• ui-ux-designer agent - For iterative design refinement