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.
git clone --depth 1 https://github.com/beel-collab/presets.devWrote 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/rules/beel-collab/presets.dev/nextjs-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/nextjs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nextjs-rules/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/rules/beel-collab/presets.dev/nextjs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nextjs-rules.svg" alt="Reviewed on agentmods" width="80" 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 | $0.02416 |
| Opus 5.5 | $0.00000 | $0.00966 |
| Sonnet 5.5 | $0.00000 | $0.00483 |
| Haiku 4.5 | $0.00000 | $0.00242 |
Grade A, and why
nextjs-rules 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 today.
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 — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Next.js Rules for Cursor: App Router, TypeScript and Server Actions
Install
Install the native export at .cursor/rules/nextjs-rules.mdc.
Copy that export, not this catalog file. Catalog fields such as tools and author are for presets.dev.
Install one skill file per name. Cursor, GitHub Copilot, Codex, Antigravity CLI, and Devin can all read .agents/skills, so a second copy with the same name collides.
Next.js Rules for Cursor: App Router, TypeScript and Server Actions
File-scoped Cursor rule for Next.js. It attaches when a matching file is in context.
Updated for Next.js 16.4.6, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Read package.json, the lockfile, and next.config before editing. Match the directories and helpers the app already uses.
Project shape
Prefer the App Router in app/ or src/app/. A file is a Server Component until it starts with "use client". Put page, layout, loading, error, and not-found where the router already expects them. Colocate a route's data helper next to that route.
Leave pages/ alone unless the task is a migration. Do not mix App Router conventions into a Pages Router file, and do not start a second routing tree.
Route Handlers live in route.ts. They are HTTP endpoints. Give them a method, a status, and a bounded body. On Next 16, request interception is proxy.ts (or src/proxy.ts) exporting proxy. It runs on the Node.js runtime and cannot be switched to Edge. middleware.ts is the deprecated name, still available only when the project must stay on the Edge runtime. Do not create a new middleware.ts on a 16 app. The proxy is a gate for redirects and coarse checks. It is not the place for database work.
TypeScript
Keep the project's strict compiler settings. Type props with the helpers the project already generates, and rerun next typegen or next dev when those helpers are stale. Validate data that crosses a network or a form boundary with the parser the repo already uses. Do not add a second validation library.
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.
- today First seen · 150 lines · 0 tokens per session scan A 76fc098cfca4
nextjs-rules is a cursor rule published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,416 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 2026-11-13.
nextjs-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nextjs-rulesbeel-collab/presets.dev | Cursor rule | 3 | yesterday | MIT | A | 0 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 190k | 15d ago | MIT | A | 604 | Cursor |
| angular-20angular/angular | Cursor rule | 101k | today | MIT | A | 0 | Cursor |
| dev-standardapache/superset | Cursor rule | 76k | today | Apache-2.0 | A | 1,147 | Cursor |
| prefer-direct-imports-over-module-mocksprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| config-validation-and-normalizationprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| control-plane-descriptorsprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |