How does the App Router resolve a URL to a page component?

Unfortunately, the available repository data doesn't contain detailed information about the core URL resolution algorithm for the App Router. The data focuses on patterns, testing utilities, and configuration rather than the routing engine's internals.

Based on what I can see in the repository data, here's what I can tell you about the App Router structure:

File Structure Convention: The App Router uses a file-system-based routing model where URLs map to the app/ directory structure. For example:

• /products/jackets/my-jacket maps to files in app/products/[category]/[slug]/ with a page.tsx file

URL to Params Resolution: As shown in the patterns, dynamic segments like [region] and [category] are extracted from the pathname. Components receive these as params: Promise<{ region: string; category: string }> [.claude-plugin/plugins/cache-components/skills/cache-components/PATTERNS.md:L619-L628], which they must await before using.

Build Template: The actual routing happens in the app-page.ts build template [.agents/skills/dce-edge/SKILL.md:L54-L58], which is compiled by the user's bundler at build time and matches pathnames to page components.

However, I don't have access to the specific algorithm that matches incoming URLs to route segments or how the manifest is used to perform this lookup. To fully understand the resolution logic, you'd need to examine the core routing implementation files in packages/next/src/server/ or related route matching modules.

FOLLOW_UPS:

• How does App Router handle dynamic segment catch-all routes?
• What is the role of generateStaticParams in routing?
• How does App Router differentiate between layouts and pages?