Screenshotting Changelog

Screenshot Changelog

Use this skill when preparing a pull request that includes visual/UI changes. Capture before and after screenshots to create a visual changelog that reviewers can quickly scan.

Steps

1. Capture the "before" state — before making changes (or on the base branch), start the dev server and screenshot the affected pages:

   git stash  # or checkout the base branch

Start the dev server, then:

   Tool: browser_navigate
   Arguments: { "url": "http://localhost:3000/affected-page", "take_screenshot_afterwards": true }

   Tool: browser_take_screenshot
   Arguments: { "fullPage": true, "filename": "before-homepage.png" }

Repeat for each affected page or component state.

2. Switch to the feature branch — apply your changes:

   git stash pop  # or checkout the feature branch

Wait for the dev server to hot-reload (or restart it).

3. Capture the "after" state — screenshot the same pages:

   Tool: browser_take_screenshot
   Arguments: { "fullPage": true, "filename": "after-homepage.png" }

4. Generate the changelog — create a summary describing what changed visually:

   ## Visual Changes

   ### Homepage
   **Before:**
   ![before](before-homepage.png)

   **After:**
   ![after](after-homepage.png)

   Changes: Updated hero section layout, new CTA button color, added testimonials section.

5. Include in the PR description — paste the visual changelog into the PR body so reviewers can see the changes at a glance without running the app locally.

Variations

• Responsive comparison: use browser_resize to capture screenshots at mobile (375px), tablet (768px), and desktop (1280px) widths.
• Dark mode comparison: if the app has a dark mode toggle, capture both themes.
• Interactive states: capture hover states, open modals, filled forms, and error states.

Notes

• Screenshots are saved to the workspace. You can reference them in markdown or upload them to the PR.
• For component-level screenshots, navigate to a Storybook URL or a specific component route.
• This is most valuable for design-heavy PRs — skip it for backend-only changes.