What is lighthouse-ci?

Lighthouse CI is a set of tools from Google Chrome that automatically checks your website's quality every time you push code changes. It is built on top of Lighthouse, a tool that audits web pages and scores them on performance, accessibility, SEO, and how well they follow web best practices. The CI part means it runs those audits automatically in your continuous integration pipeline, the automated system that runs checks whenever code changes are submitted. The main use case is catching problems before they reach your users. If a code change makes your site slower, breaks something for screen reader users, or drops your SEO score, Lighthouse CI can flag that change and block it from being merged. You set thresholds for the scores you care about, and the system fails the check if any score drops below them. Over time, you can also track how your scores change across commits and compare two versions of your site to see which specific files or pages got better or worse. To use it, you add a short configuration to your project's CI workflow file. The README includes a ready-to-copy example for GitHub Actions that installs Lighthouse CI and runs it against your built site on every push. For teams that want to store and view historical results, there is an optional server component you can run yourself that provides a dashboard for browsing past reports and comparing runs. The tooling is aimed at web developers who want to make quality checks part of their regular development process rather than something done manually and occasionally. A getting-started guide and introductory documentation for people unfamiliar with CI are both linked from the README. There is also a community-built GitHub Action that requires no separate server infrastructure if you just want to run checks on pull requests.