vrt

vlmkit is a TypeScript visual-regression toolkit built on Playwright + pixelmatch. Beyond raw pixel diffs, it surfaces agent-friendly signal: computed-style deltas split into universal vs. breakpoint-gated, per-section diffRatio against component bboxes, worst-viewport screenshot paths inline, and (optionally) VLM-emitted CHANGE lists feeding an LLM CSS-fix step.

Source: https://github.com/mizchi/vlmkit. CHANGELOG + old-CLI-to-new-CLI mapping: CHANGELOG.md.

When to invoke this skill