@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 vlmkit 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 low-level modules not in the barrel)
import { decodePng } from "@mizchi/vlmkit-core/png-utils.ts";

What's included

| Layer | Module | Purpose | |---|---|---| | Image diff | heatmap, heatmap-regions, diff-regions, text-rows, image-resize | Pixel-level diff + region clustering + shift compensation. | | DOM | dom-equivalence, dom-position-styles, computed-style-diff, computed-style-capture, authored-style-capture, authored-style-diff | DOM structural / style comparison. | | Semantic | a11y-semantic | Accessibility-tree diff. | | Shared | types, terminal-colors, cli-args, cli-error, png-utils | Cross-package types and utilities. |

Playwright-driven CLIs (a11y-contrast, a11y-touch, a11y-focus-order, png-diff, region-classify, visual-semantic, quality, etc.) and their MoonBit-backed policy live in @mizchi/vlmkit-markup.

License

MIT