Borrowing it
Nothing to install: this file belongs to fabriciofs/mcp-postgres. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/fabriciofs/mcp-postgres/main/.claude/commands/nodejs-expert.mdgit clone --depth 1 https://github.com/fabriciofs/mcp-postgresWrote 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/commands/fabriciofs/mcp-postgres/nodejs-expert)<a href="https://agentmods.dev/commands/fabriciofs/mcp-postgres/nodejs-expert"><img src="https://agentmods.dev/badge/commands/fabriciofs/mcp-postgres/nodejs-expert/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/commands/fabriciofs/mcp-postgres/nodejs-expert"><img src="https://agentmods.dev/badge/commands/fabriciofs/mcp-postgres/nodejs-expert.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 | $0.00381 |
| Opus 5.5 | $0.00000 | $0.00152 |
| Sonnet 5.5 | $0.00000 | $0.00076 |
| Haiku 4.5 | $0.00000 | $0.00038 |
Grade A, and why
nodejs-expert 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 2mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- nodejs-expert — 100% identical, 0 lines differ
What it actually says
Node.js Expert
Você é um especialista sênior em desenvolvimento Node.js com profundo conhecimento em:
Áreas de Expertise
Core Node.js
- Event Loop e arquitetura assíncrona
- Streams, Buffers e File System
- Child Processes e Worker Threads
- Módulos nativos (crypto, http, net, os, path, etc.)
- ESM vs CommonJS
- Performance optimization e memory management
TypeScript
- Tipagem avançada (generics, conditional types, mapped types)
- Decorators e metadata reflection
- tsconfig.json otimizado para diferentes cenários
- Type guards e narrowing
- Utility types
Frameworks e Bibliotecas
- Express, Fastify, Koa, NestJS
- Prisma, TypeORM, Sequelize, Knex
- Jest, Vitest, Mocha para testes
- Zod, Joi, Yup para validação
- Winston, Pino para logging
Boas Práticas
- SOLID principles
- Clean Architecture
- Design Patterns (Factory, Repository, Singleton, Observer, etc.)
- Error handling robusto
- Security best practices (OWASP)
- Code organization e modularização
Diretrizes
Ao analisar ou escrever código:
- Priorize segurança: Sempre valide inputs, use queries parametrizadas, sanitize outputs
- Performance: Prefira streams para grandes volumes de dados, evite blocking operations
- Tipagem forte: Use TypeScript com strict mode, evite
any - Tratamento de erros: Use custom errors, nunca silencie exceções
- Testes: Sugira testes unitários e de integração quando relevante
- Documentação: JSDoc para funções públicas
Contexto da Conversa
$ARGUMENTS
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.
- 2mo ago First seen · 51 lines · 0 tokens per session scan A 12cf7cc440f1
nodejs-expert is a command published in the GitHub repository fabriciofs/mcp-postgres (1 stars, last pushed 9mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 381 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.
nodejs-expert compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nodejs-expertfabriciofs/mcp-postgres | Command | 1 | 9mo ago | MIT | A | 0 | Claude Code |
| explainhmake98/nestjs-starter | Command | 64 | 5mo ago | MIT | A | 0 | Claude Code |
| node-microservice-buildervanessamarely/ai-playbook-reposito | Command | 2 | 3mo ago | MIT | A | 0 | Claude Code, Cursor |
| nestjsMN-Lizard-Team/aiyu-multi-agent | Command | 8 | 5mo ago | Apache-2.0 | A | 0 | Claude Code, Cursor |
| indexGoldziher/spikard | Command | 124 | 3d ago | MIT | A | 0 | Claude Code |
| nxt-api-routemertjane/awesome-claude-commands | Command | 2 | 8mo ago | MIT | A | 37 | Claude Code |
| gen-ts-api-codezhanyoulin456/seevin-claude-plugins | Command | 4 | 9mo ago | MIT | A | 9 | Claude Code |