vercel-labs / next-browser

The CLI itself is the bulk of what's here: after a global install (pnpm add -g @vercel/next-browser, plus playwright install chromium) it opens a real Chromium instance and lets an agent run one-shot commands against it — tree and snapshot for the component and accessibility trees, errors/logs/network for build, runtime, and request inspection, click/fill/eval to interact with the page, perf for Core Web Vitals and hydration timing, and ppr lock to freeze a Partial Prerendering shell for inspection, then resume it when you're done. A long-lived daemon keeps the browser open between commands, so an agent loop can fire them off without managing browser lifecycle itself.

None of that command set is documented as a skill in our database — the CLI's own README is the only place any of it is explained. The single live skill here, synthesize-transcript, does something different: it reads back an agent's transcript of using the next-browser CLI and proposes SKILL.md updates, feature requests, and bug fixes for the tool itself, aimed at vercel-labs's own maintainers rather than at someone debugging their Next.js app.