argent-screenshot-diff
Installation
SKILL.md
1. Role
Use screenshot-diff as supporting visual evidence for UI QA and visual regression checks. It highlights pixel-visible change or stability; it does not replace visual inspection, accessibility/component-tree state, frame/attribute checks, logs, network evidence, or app behavior. Its description covers the input combinations, physical-iPhone captures and the result.
Do not use screenshot diffing for tap-coordinate discovery. Use describe to find targets first.
2. When To Use
- Required for explicit "UI regression test", "visual regression test", "screenshot diff", "compare screenshots", or "before/after visual comparison" requests, unless stable comparable screenshots cannot be produced.
- Good fit when the expected result is pixel-visible, or when the risk is an unintended visual regression outside the exact element changed.
- Poor fit when the result is better verified structurally: state changes, navigation existence, accessibility tree contents, console/network behavior, or unit tests.
- Poor fit when dynamic content, unpausable animation, timestamps, ads, random data, or missing baseline/current screenshots would make the comparison noisy or meaningless.