Netlify is expanding its `Build Plugins` feature, allowing plugins to run custom automated tasks at different stages of the build-deploy lifecycle, including after a successful site deploy (`onSuccess`) and at the very end (`onEnd`). This enables new plugin capabilities such as crawling live deploy URLs, running performance audits, sending timely deploy data, testing Netlify Functions responses, and quicker access to Deploy Previews. The feature is now available for customers to install or create their own plugins, with opportunities for feedback on future features.