@mizchi/vlmkit-core

VRT diff engine and shared types. Pure-TypeScript image / DOM / a11y / visual comparison primitives — no Playwright required for the lightweight surface.

Part of the vrt monorepo.

Install

pnpm add @mizchi/vlmkit-core

Usage

The package ships both a curated barrel and deep per-module exports.

// Curated barrel (excludes CLI / Playwright modules)
import { diffPng, type VrtDiff } from "@mizchi/vlmkit-core";

// Deep import (use for CLI / Playwright-bound modules)
import { runA11yTouch } from "@mizchi/vlmkit-core/a11y-touch.ts";

What's included

| Layer | Module | Purpose | |---|---|---| | Image diff | png-diff, heatmap, heatmap-regions, diff-regions, region-classify, shift-origin, text-rows, grid-ratio, image-resize | Pixel-level diff + region clustering + shift compensation. | | DOM | dom-equivalence, dom-position-styles, computed-style-diff, computed-style-capture | DOM structural / style comparison. | | Semantic | a11y-semantic, visual-semantic, quality | Accessibility-tree diff, visual-classification, quality scoring. | | CLI tools (deep import) | a11y-contrast, a11y-touch, a11y-focus-order, element-compare, mask | Run via the vrt CLI or import the exported runXxx functions. | | Shared | types, terminal-colors, cli-args, cli-error, png-utils | Cross-package types and utilities. |

License

MIT