I Built a Production-Grade Next.js Caching Skill Because the Docs Let Me Down

The Next.js docs cover caching basics. They don't tell you what to do when your page has dynamic routes, search params, or personalized content. I ran into this firsthand. I was building a production app and kept asking myself: If the page has searchParams , does "use cache" still work? Where do I put cookies() if I can't call it inside a cached function? How do I invalidate one product without nuking the entire cache? Should the page component fetch data or just orchestrate? The docs had none o