# Lighthouse Verification

> Instructions for how to validate changes made to Lighthouse. Must invoke when making changes to Lighthouse.

- Skill: `googlechrome/lighthouse-verification` (Agent Skill)
- Install (CLI): `npx skillmds@latest add googlechrome/lighthouse-verification`
- Raw SKILL.md: https://api.skillmd.com/api/skills/googlechrome/lighthouse-verification/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: googlechrome (https://skillmd.com/u/googlechrome)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/googlechrome/lighthouse-verification

---


# Lighthouse verification

Run a subset of the unit tests like this:

```
yarn mocha test/files/to/run
```

Don't run "yarn unit" - it takes too long.

Run typechecking and linter:

```
yarn type-check
yarn lint --fix
```

Make sure to run some unit tests and the type-checker / linter after making changes.

Always run `yarn update:sample-json` after making any change.