Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add CaseMark/casedotdev-starter-app --skill routinggit clone --depth 1 https://github.com/CaseMark/casedotdev-starter-appWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/casemark/casedotdev-starter-app/routing)<a href="https://agentmods.dev/skills/casemark/casedotdev-starter-app/routing"><img src="https://agentmods.dev/badge/skills/casemark/casedotdev-starter-app/routing.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.01993 |
| Opus 5 | $0.00000 | $0.00996 |
| Sonnet 5 | $0.00000 | $0.00399 |
| Haiku 4.5 | $0.00000 | $0.00199 |
Grade A, and why
routing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 376 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Routing Skill
Purpose
This skill covers the Next.js 15+ App Router, including pages, layouts, navigation, and route organization.
Key Concepts
- App Router: Next.js 15+ uses the
app/directory for routing - File-based Routing: Folders define routes, special files define UI
- Server Components: Default component type (no
'use client'needed) - Layouts: Shared UI that wraps pages
Special Files
page.tsx- Unique UI for a route, makes route publicly accessiblelayout.tsx- Shared UI for a segment and its childrenloading.tsx- Loading UI for a segmenterror.tsx- Error UI for a segmentnot-found.tsx- Not found UIroute.ts- API endpoint
Creating Pages
Basic Page
// app/about/page.tsx
export default function AboutPage() {
return (
<div>
<h1>About</h1>
<p>Welcome to our about page.</p>
</div>
);
}
Page with Metadata
// app/about/page.tsx
import type { Metadata } from 'next';
export const metadata: Metadata = {
title: 'About Us',
description: 'Learn more about our company',
};
export default function AboutPage() {
return <div>{/* Content */}</div>;
}
Dynamic Routes
// app/cases/[id]/page.tsx
interface PageProps {
params: Promise<{ id: string }>;
}
export default async function CasePage({ params }: PageProps) {
const { id } = await params;
return (
<div>
<h1>Case {id}</h1>
</div>
);
}
Multiple Dynamic Segments
// app/teams/[teamId]/cases/[caseId]/page.tsx
interface PageProps {
params: Promise<{
teamId: string;
caseId: string;
}>;
}
export default async function TeamCasePage({ params }: PageProps) {
const { teamId, caseId } = await params;
return (
<div>
<h1>Team {teamId} - Case {caseId}</h1>
</div>
);
}
Layouts
Root Layout
// app/layout.tsx
import type { Metadata } from 'next';
import { Inter } from 'next/font/google';
import './globals.css';
const inter = Inter({ subsets: ['latin'] });
export const metadata: Metadata = {
title: 'Create Legal App',
description: 'Legal tech application',
};
export default function RootLayout({
children,
}: {
children: React.ReactNode;
}) {
return (
<html lang="en">
<body className={inter.className}>{children}</body>
</html>
);
}
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 376 lines · 0 tokens per session scan A 5b9b76c1e0f7
routing is a skill published in the GitHub repository CaseMark/casedotdev-starter-app (2 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,993 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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