Build a Conversion Rate Optimizer with Claude Code

Build a Conversion Rate Optimizer web app. People search for "conversion rate optimizer" about 700 times a month, plus related searches like "conversion rate optimization", "cro tools", "website conversion optimizer". The goal is a tool that ranks for those searches and makes money.

What it should do:
Build a conversion rate optimizer with URL analysis and conversion tracking. Include page speed analysis, mobile optimization checks, and user experience scoring. Add A/B testing suggestions and conversion funnel analysis. Show improvement recommendations and priority rankings. Focus on getting basic analysis working first.

How to build it:
1. Read this folder first. If it is empty, set up Next.js (App Router, TypeScript, Tailwind). Write a short PLAN.md with the pages, components, any library or API you need, and what you are leaving for later. Then build.
2. Put the tool itself on the homepage so a visitor can use it within seconds, with no sign-up. Do the processing in the browser where you can, so it is fast and cheap to run. Look at how Optimizely, Unbounce, VWO do it and make ours simpler and faster.
3. Make it rank. Use "conversion rate optimizer" in the title tag, H1 and meta description. Under the tool, add a short how-to and an FAQ with FAQPage schema, and add a sitemap and robots.txt. Scaffold these programmatic pages from one template and a data file: /conversion-optimizer-[industry], /cro-tools-[website-type], /conversion-analysis-[business-type].
4. Monetisation: Freemium: 5 analyses/month, $15/mo unlimited + reports. Add a pricing page and the free usage limit, and leave Stripe checkout as a clearly marked stub with the environment variables it needs.
5. Run it locally and test the main flow end to end, including edge cases like empty input and very large files. Fix what breaks, then finish with a summary of what works, what is stubbed and how to deploy it to Vercel.

Paste it into Claude Code in an empty folder. It plans first, so read PLAN.md and steer before it starts building.