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/nestjs-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/nestjs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nestjs-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/nestjs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nestjs-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 | $0.01044 |
| Opus 5.5 | $0.00000 | $0.00418 |
| Sonnet 5.5 | $0.00000 | $0.00209 |
| Haiku 4.5 | $0.00000 | $0.00104 |
Grade A, and why
nestjs-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 — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NestJS Rules for Cursor: Modules, DTOs and Guards
Install
Install the native export at .cursor/rules/nestjs-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.
NestJS Rules for Cursor: Modules, DTOs and Guards
File-scoped Cursor rule for NestJS. It attaches when a matching file is in context.
Updated for NestJS 12.4.2, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Project shape
A feature is a module that declares its controllers and providers and exports only what other modules may use. Do not reach into another module's private provider. A new provider is listed in providers. A global module is rare and already a project decision.
Controllers take DTOs. Services own the use case and the transaction. Repositories talk to the database. Do not query from the controller.
DTOs and validation
Nest 12 validates in two supported ways. A class DTO with class-validator decorators needs ValidationPipe. A Standard Schema (Zod, Valibot, ArkType) passed as @Body({ schema }) needs StandardSchemaValidationPipe. The decorator only stores the schema. Without that pipe, nothing is checked. A TypeScript interface disappears at runtime and does not validate. Do not flag @Body({ schema }) when the pipe is registered. Do not use an interface as the @Body() type and call it safe.
The validation pipe rejects unknown fields when the project has whitelist and forbidNonWhitelisted. Keep that on. A write copies the DTO fields the entity is allowed to store. Do not spread the DTO into a save if the DTO contains a role or an owner id the client must not set.
Guards and errors
A route that changes data has a guard. Class-level @UseGuards is easy to forget on a new method. Public routes are marked with the project's public decorator and are rare. Check the owner inside the service even after the guard, when the guard only checks that someone is signed in.
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 · 99 lines · 0 tokens per session scan A 2f67bb2c7f8a
nestjs-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 1,044 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.
nestjs-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nestjs-rulesbeel-collab/presets.dev | Cursor rule | 3 | yesterday | MIT | A | 0 | Cursor |
| pn-ruby-backendperniemann/pnCore | Cursor rule | 0 | 4d ago | MIT | A | 0 | Cursor |
| pn-rust-backendperniemann/pnCore | Cursor rule | 0 | 4d ago | MIT | A | 0 | Cursor |
| pn-go-backendperniemann/pnCore | Cursor rule | 0 | 4d ago | 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 |