What problem does it solve? UI changes can silently break layout, spacing, color, typography, or rendering on mobile screens, and manual inspection often misses subtle pixel-level regressions. This Skill provides a deterministic screenshot comparison workflow that produces visual diff evidence for before/after UI verification. ## Core Features & Use Cases - Visual Regression Comparison: Compare a saved baseline PNG against a live-captured current screenshot, or compare two saved screenshot files directly. - Full-Resolution Capture Guidance: Capture baseline and current images at scale 1.0 with image output suppressed from context, keeping comparisons accurate and context usage low. - Diff Artifact Output: Produce diff summaries and artifact files in a specified output directory for review alongside structural and runtime evidence. - Use Case: After changing a screen's layout, capture the pre-change baseline, apply the change, then run the diff to confirm only the intended pixels changed and no unintended regression occurred elsewhere on the screen. ## Quick Start Capture a full-resolution baseline screenshot of the screen, make your UI change, then ask the assistant to run a screenshot diff comparing the saved baseline against the current screen on the device.
