# Routing

> Designs the app/ route tree for a Next.js 16 App Router site — route groups for layout scoping, dynamic segments with awaited params (they are Promises in Next 16), parallel routes with their mandatory default.tsx, intercepting routes for URL-addressable modals, per-segment loading.tsx/error.tsx/not-found.tsx plus global-not-found.tsx and global-error.tsx as designed moments, and a root-layout Speculation Rules block that prerenders the likely next document — all designed to the system, not framework defaults. Invoke during the build phase when translating design/SITEMAP.md into app/ directories, when adding a dynamic or catch-all route, when a modal needs a shareable URL, when a 404/error/loading surface still looks default, or when navigation should feel instant. Trigger phrases — "set up the routes", "dynamic route", "route group", "slug page", "modal with a URL", "intercepting route", "custom 404", "500 error page", "loading state for this page", "error page", "prerender the next page".

## Facts
- Page: https://tashan.sh/capability/skill-blyatiful1-routing
- tashan id: skill:blyatiful1/routing
- Source: https://github.com/blyatiful1/ultraweb
- Type: skill
- Category: design
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 99.0
- Freshness: 97.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- License: MIT
- Official: no

## Install

```sh
cp -r routing ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-23 by tashan (https://tashan.sh) from public evidence. Scorer s5.