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 cookieMonsterDev/agents-skills --skill nestjs-docsgit clone --depth 1 https://github.com/cookieMonsterDev/agents-skillsWrote 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/cookiemonsterdev/agents-skills/nestjs-docs)<a href="https://agentmods.dev/skills/cookiemonsterdev/agents-skills/nestjs-docs"><img src="https://agentmods.dev/badge/skills/cookiemonsterdev/agents-skills/nestjs-docs/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/skills/cookiemonsterdev/agents-skills/nestjs-docs"><img src="https://agentmods.dev/badge/skills/cookiemonsterdev/agents-skills/nestjs-docs.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 | $0.00116 | $0.01449 |
| Opus 5.5 | $0.00046 | $0.00580 |
| Sonnet 5.5 | $0.00023 | $0.00290 |
| Haiku 4.5 | $0.00012 | $0.00145 |
Grade A, and why
nestjs-docs 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 — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NestJS questions are easy to answer from stale memory, NestJS 11 assumptions that no longer apply in NestJS 12, or generic Node.js advice. Use this skill to ground answers in the official NestJS documentation and return the closest authoritative page instead of improvising framework patterns.
When to Use
Use this skill when the request is about:
- NestJS concepts, architecture, terminology, or project structure
- Modules, controllers, providers, services, and dependency injection
- Middleware, guards, pipes, interceptors, exception filters, and custom decorators
- Request lifecycle, execution context, or scoping (global, controller, route)
- Configuration, environment variables, and dynamic modules
- Databases, ORMs, validation, serialization, caching, queues, and task scheduling
- Authentication, authorization, CORS, Helmet, CSRF, rate limiting, and encryption
- GraphQL, microservices, WebSockets, and hybrid applications
- OpenAPI/Swagger documentation and API design with
@nestjs/swagger - Testing, CLI scaffolding, deployment, serverless, and performance tuning
- Observability, reliability patterns (resilience, idempotency, outbox, locks), and health checks
- NestJS 12 migration, ESM packages, and version differences from NestJS 11
- Express or Fastify as the underlying HTTP platform (
@nestjs/platform-express,@nestjs/platform-fastify)
Do not use this skill for:
- Raw Express or Fastify usage without NestJS abstractions. Use
expressjs-docsorfastify-docsinstead. - Angular frontend questions unless the user is asking about shared Nest/Angular patterns in the NestJS docs.
- Third-party package behavior not covered by NestJS docs unless the docs explicitly reference that package.
Workflow
1. Classify the request
Decide which bucket the question belongs to before searching:
- Getting started or first steps
- Core fundamentals (modules, controllers, providers, DI)
- Request pipeline (middleware, guards, pipes, interceptors, filters)
- Techniques (configuration, database, validation, caching, queues, etc.)
- Security and authentication
- GraphQL, microservices, or WebSockets
- OpenAPI/Swagger
- Observability or reliability
- CLI, testing, deployment, or FAQ
- Migration and version differences
- Recipes and integration patterns
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · +8 lines · +11 tokens per session 6818e482bcfd
- 1mo ago First seen · 104 lines · 105 tokens per session scan A b2647bbea13f
nestjs-docs is a skill published in the GitHub repository cookieMonsterDev/agents-skills (6 stars, last pushed today), licensed MIT. It adds 116 tokens to every session and 1,449 once invoked, about $0.0005 per session on Opus 5.5. 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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