senior-backend

senior-backend is a skill for Claude Code, Codex from ricneves-ai/flowgrammers-skills. It costs 112 tokens per session (2,742 once invoked), scanned A, original, MIT.

A guide for designing and building the server-side part of applications, including REST APIs, authentication, databases, and microservices.

In plain words
What is it for?
Use it to generate API routes from OpenAPI definitions, create database migrations, test endpoint load, design authentication flows, and review backend code.
Why use it?
It helps avoid inconsistent API designs, inefficient database work, and common security weaknesses in backend systems.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python scripts/api_scaffolder.py openapi.yaml --framework express --output src/routes/.

Good fit Use it to generate API routes from OpenAPI definitions, create database migrations, test endpoint load, design authentication flows, and review backend code.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/ricneves-ai/flowgrammers-skills
agentmods
npx agentmods add skills/ricneves-ai/flowgrammers-skills/senior-backend

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for senior-backend

README.md
[![agentmods](https://agentmods.dev/badge/skills/ricneves-ai/flowgrammers-skills/senior-backend/github.svg)](https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/senior-backend)
Your own site
<a href="https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/senior-backend"><img src="https://agentmods.dev/badge/skills/ricneves-ai/flowgrammers-skills/senior-backend/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.

agentmods 80×15 button for senior-backend

Your own site · 80×15
<a href="https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/senior-backend"><img src="https://agentmods.dev/badge/skills/ricneves-ai/flowgrammers-skills/senior-backend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,742 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00112 $0.02742
Opus 5 $0.00056 $0.01371
Sonnet 5 $0.00022 $0.00548
Haiku 4.5 $0.00011 $0.00274

Measured 9d ago against content hash 67fe7c14cb56, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

senior-backend 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 9d 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.

engineering-team/senior-backend/SKILL.md · 368 lines

How it starts

The opening of the file, as written. The whole thing — 368 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Engenheiro Backend Sênior

Padrões de desenvolvimento backend, design de API, otimização de banco de dados e práticas de segurança.


Início Rápido

# Gerar rotas de API a partir da spec OpenAPI
python scripts/api_scaffolder.py openapi.yaml --framework express --output src/routes/

# Analisar schema de banco de dados e gerar migrações
python scripts/database_migration_tool.py --connection postgres://localhost/mydb --analyze

# Teste de carga em um endpoint de API
python scripts/api_load_tester.py https://api.example.com/users --concurrency 50 --duration 30

Visão Geral das Ferramentas

1. API Scaffolder

Gera handlers de rotas de API, middleware e especificações OpenAPI a partir de definições de schema.

Entrada: Spec OpenAPI (YAML/JSON) ou schema de banco de dados Saída: Handlers de rota, middleware de validação, tipos TypeScript

Uso:

# Gerar rotas Express a partir da spec OpenAPI
python scripts/api_scaffolder.py openapi.yaml --framework express --output src/routes/
# Saída: Generated 12 route handlers, validation middleware, and TypeScript types

# Gerar a partir do schema do banco de dados
python scripts/api_scaffolder.py --from-db postgres://localhost/mydb --output src/routes/

# Gerar spec OpenAPI a partir de rotas existentes
python scripts/api_scaffolder.py src/routes/ --generate-spec --output openapi.yaml

Frameworks Suportados:

  • Express.js (--framework express)
  • Fastify (--framework fastify)
  • Koa (--framework koa)

2. Ferramenta de Migração de Banco de Dados

Analisa schemas de banco de dados, detecta mudanças e gera arquivos de migração com suporte a rollback.

Entrada: String de conexão do banco de dados ou arquivos de schema Saída: Arquivos de migração, relatório de diff de schema, sugestões de otimização

Uso:

# Analisar schema atual e sugerir otimizações
python scripts/database_migration_tool.py --connection postgres://localhost/mydb --analyze
# Saída: Missing indexes, N+1 query risks, and suggested migration files

# Gerar migração a partir do diff de schema
python scripts/database_migration_tool.py --connection postgres://localhost/mydb \
  --compare schema/v2.sql --output migrations/

# Executar migração em modo dry-run
python scripts/database_migration_tool.py --connection postgres://localhost/mydb \
  --migrate migrations/20240115_add_user_indexes.sql --dry-run

Read the full file on GitHub · 368 lines

Changes

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.

  1. 9d ago First seen · 368 lines · 112 tokens per session scan A 67fe7c14cb56

Subscribe to this mod's changes

senior-backend is a skill published in the GitHub repository ricneves-ai/flowgrammers-skills (112 stars, last pushed 3mo ago), licensed MIT. It adds 112 tokens to every session and 2,742 once invoked, about $0.0006 per session on Opus 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 2026-09-03.

Related

Other skills, from other repositories

azure-postgres-ts

Connect to Azure Database for PostgreSQL Flexible Server from Node.js/TypeScript using the pg (node-postgres) package. Use for PostgreSQL queries, connection pooling, transactions, and Microsoft Entra ID (passwordless) authentication. Triggers: "PostgreSQL", "postgres", "pg client", "node-postgres", "Azure PostgreSQL…

microsoft/skills · 94 tokens

butterbase

AI-native, open-source backend-as-a-service with a built-in Model Context Protocol server. Postgres, auth, storage, functions, AI gateway.

butterbase-ai/butterbase · 34 tokens

supabase

Use when doing ANY task involving Supabase. Triggers: Supabase products (Database, Auth, Edge Functions, Realtime, Storage, Vectors, Cron, Queues); client libraries and SSR integrations (supabase-js, @supabase/ssr) in Next.js, React, SvelteKit, Astro, Remix; auth issues (login, logout, sessions, JWT, cookies…

supabase/agent-skills · 185 tokens

supabase-cli

This skill should be used when user asks to "use supabase CLI", "supabase init", "supabase start", "run migrations", "deploy edge functions", "manage Supabase project", or works with the supabase command-line tool for local development and project management.

fcakyon/claude-codex-settings · 60 tokens

supabase-js

This skill should be used when user asks to "use supabase-js", "query Supabase database", "supabase auth", "supabase storage", "supabase realtime", "supabase edge functions", or works with the @supabase/supabase-js JavaScript/TypeScript SDK.

fcakyon/claude-codex-settings · 64 tokens

supabase-node

Express/Hono with Supabase and Drizzle ORM.

alinaqi/maggy · 14 tokens