Meticulous Simulate And Diff

Runs a Meticulous session replay against a live URL and tells you what broke visually. You give it a session ID and optionally a base replay to diff against. With a base, it compares screenshots pixel by pixel and diffs the HTML snapshots so you can see both what changed visually and which DOM elements are responsible. Without a base it just captures screenshots for manual inspection. The HTML diff analysis is smart: it pulls the full page DOM from metadata files and highlights class changes and structural shifts, which usually map directly to the components you changed. Good for catching regressions before you push, especially if you're tweaking styles or layout and want to know exactly which routes got affected.

Install to Claude Code

npx -y skills add alwaysmeticulous/skills --skill meticulous-simulate-and-diff --agent claude-code