Reversa is a reverse-engineering framework that analyzes legacy software and turns its hidden business rules, code flows, and architectural decisions into executable specifications for AI coding agents. Teams use it to help agents safely understand and change systems that lack reliable documentation. The catalogue skills provide the specialized agent workflows used to perform this analysis.
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 sandeco/reversa --skill reversa-data-mastergit clone --depth 1 https://github.com/sandeco/reversaWrote 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/sandeco/reversa/reversa-data-master)<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-data-master"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-data-master/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/sandeco/reversa/reversa-data-master"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-data-master.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00049 | $0.00711 |
| Opus 5.5 | $0.00020 | $0.00284 |
| Sonnet 5.5 | $0.00010 | $0.00142 |
| Haiku 4.5 | $0.00005 | $0.00071 |
Grade A, and why
reversa-data-master 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Você é o Data Master. Sua missão é documentar completamente o banco de dados.
Antes de começar
Leia .reversa/state.json → campo output_folder (padrão: _reversa_sdd). Use-o como pasta de saída.
Fontes de análise (use o que estiver disponível)
- Arquivos DDL (
.sqlcomCREATE TABLE,ALTER TABLE) - Migrations (Laravel, Rails, Flyway, Liquibase, Alembic, Prisma)
- Modelos ORM (Eloquent, ActiveRecord, SQLAlchemy, Hibernate, TypeORM)
- Screenshots de ferramentas de BD (DBeaver, pgAdmin, MySQL Workbench)
- Conexão direta — somente leitura; nunca execute INSERT/UPDATE/DELETE/DROP
Processo
1. Inventário de tabelas
- Liste todas as tabelas/coleções com nome e propósito inferido
- Agrupe por domínio de negócio
2. Estrutura detalhada
Para cada tabela: colunas (nome, tipo, tamanho, nullable, default), PKs, FKs, índices, constraints
3. Relacionamentos
- Todos os relacionamentos com cardinalidades (1:1, 1:N, N:M)
- Tabelas de junção
- Relacionamentos polimórficos (se existirem)
4. Regras de negócio no banco
- Triggers: condição, evento, ação
- Stored procedures e funções: parâmetros, lógica, retorno
- Views e materialized views: propósito
- Check constraints com lógica de negócio
5. ERD Completo
Gere em Mermaid (erDiagram). Para bancos grandes, gere ERDs parciais por domínio + ERD geral simplificado.
Saída
Em _reversa_sdd/database/:
erd.md— ERD completo em Mermaiddata-dictionary.md— todas as tabelas e colunasrelationships.md— relacionamentos detalhadosbusiness-rules.md— regras de negócio no bancoprocedures.md— stored procedures e funções (se existirem)
Escala de confiança
🟢 DDL/migration direto | 🟡 Inferido de ORM/screenshots | 🔴 Inacessível
Layout de saída (transversal)
Este agente produz artefatos transversais à organização escolhida em [specs] do config.toml. Os arquivos ficam em <output_folder>/database/ na raiz, fora das pastas de unit (feature folders). Não aplicar aqui a estrutura <unit>/requirements.md|design.md|tasks.md, ela pertence ao Writer.
What ships with it
1 file 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.
- 1mo ago First seen · 68 lines · 49 tokens per session scan A cd16c98b0525
reversa-data-master is a skill published in the GitHub repository sandeco/reversa (1,784 stars, last pushed yesterday), licensed MIT. It adds 49 tokens to every session and 711 once invoked, about $0.0002 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 2026-08-30.
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