How does the App Router resolve a route to a page component? Cite the source.

I apologize, but I cannot provide a complete answer to your question with the repository data available. The retrieved data shows examples of how pages are structured in the App Router (with layouts, dynamic segments like [region], and page components), but it does not contain the actual route resolution algorithm or the code that performs URL-to-filesystem mapping.

The data includes:

• How to compose page components with layouts [.claude-plugin/plugins/cache-components/skills/cache-components/PATTERNS.md:L605-L680]
• How to use dynamic segments like [productId] [.claude-plugin/plugins/cache-components/skills/cache-components/PATTERNS.md:L605-L680]
• How to use generateStaticParams to pre-generate routes [.claude-plugin/plugins/cache-components/skills/cache-components/PATTERNS.md:L640-L655]

However, it does not include the actual route matching logic, filesystem crawling, or segment resolution code that occurs internally.

To fully answer this question, I would need to search for files like route matchers, segment loaders, or the app router middleware—which aren't present in the current data set.