Build a Podcast Audio Enhancer with Claude Code

Build a Podcast Audio Enhancer web app. People search for "podcast audio enhancer" about 800 times a month, plus related searches like "podcast audio editor", "audio enhancement tool", "podcast sound quality". The goal is a tool that ranks for those searches and makes money.

What it should do:
Create a podcast audio enhancer with upload and automatic audio processing. Include noise reduction, volume normalization, and clarity enhancement. Add manual controls for EQ, compression, and effects. Show before/after audio comparison and export options. Include preset templates for different podcast types. Focus on getting basic enhancement 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 Audacity, Descript, Adobe Audition do it and make ours simpler and faster.
3. Make it rank. Use "podcast audio enhancer" 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: /podcast-audio-enhancer-[recording-type], /audio-enhancement-[podcast-format], /podcast-sound-[quality-level].
4. Monetisation: Freemium: 30min audio/month, $12/mo unlimited + premium effects. 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.