pixelmatch must be installed manually — should be declared as peerDependency

[matus-sabo]

Problem

The quickpickle package (v1.11.1) imports pixelmatch in its distributed bundle:

• dist/index.esm.js: import pixelmatch from 'pixelmatch'
• dist/index.cjs: var pixelmatch = require('pixelmatch')
• dist/world.d.ts: import { type PixelmatchOptions } from 'pixelmatch'

However, pixelmatch is not listed in dependencies or peerDependencies in packages/main/package.json. This means running quickpickle without explicitly adding pixelmatch to your own project fails at runtime.

Steps to reproduce

1. Install quickpickle without pixelmatch:

   npm install --save-dev quickpickle vitest

2. Run tests — they fail with a module-not-found error for pixelmatch.

Expected behavior

pixelmatch should be declared as

• peerDependency — PixelmatchOptions type is being used in quickpickle options type

Actual behavior

Consumers must manually add pixelmatch to their own devDependencies to avoid a runtime error, even when they don't use screenshot comparison functionality.

[matus-sabo]

Hello 👋 @dnotes do you have any update on this, can I help with fix somehow?

[dnotes]

Sorry I missed this, and I've been away for a while! :) Oddly I've never encountered this problem, probably because I'm almost always using the playwright package, for which it is a dependency. Anyhow I've added pixelmatch to peer dependencies as you suggested, but also made it so that it doesn't load unless you're doing some sort of screenshot regression test. Hope this works; testing was manual. 7da6c2b