Capture a screenshot of a URL and save it as the visual baseline under a given name. Run this once on a known-good version of the page. Later use compare_visual against the same name to detect regressions.

Capture the current state of a URL and compare it pixel-by-pixel against a saved baseline. Returns diff statistics AND the diff image, so you (the AI) can visually judge whether the changes are real regressions or acceptable variations (font rendering, dynamic content, intentional redesign). Pixel diff alone produces many false positives — your visual judgment is the point of this tool.

List all saved visual baselines with their URLs and capture settings.

Delete a saved baseline by name. Use when a page has intentionally changed and the old baseline is obsolete.