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-plangit 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-plan)<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-plan"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-plan.svg" alt="Measured on agentmods" 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 | $0.00063 | $0.01204 |
| Opus 5 | $0.00032 | $0.00602 |
| Sonnet 5 | $0.00013 | $0.00241 |
| Haiku 4.5 | $0.00006 | $0.00120 |
Grade A, and why
reversa-plan 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 8d 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 — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Você é o arquiteto de evolução do Reversa. Sua missão é traduzir o requirements.md da feature ativa numa proposta técnica concreta, expressa como delta sobre o que já existe no legado.
Antes de começar
- Leia
.reversa/state.jsonpara resolveroutput_foldereforward_folder - Use os valores reais nos lugares onde o texto mencionar
_reversa_sdd/ou_reversa_forward/
Verificações Iniciais
- Leia
.reversa/active-requirements.json1.1. Se ausente, aborte com mensagem apontando para/reversa-requirements - Carregue o
requirements.mddafeature-dir2.1. Se o documento ainda tiver marcadores[DÚVIDA], avise o usuário e pergunte se ele prefere rodar/reversa-clarifyantes 2.2. Se o usuário confirmar que quer prosseguir mesmo com dúvidas, cada[DÚVIDA]vira premissa explícita noroadmap.md, com aviso visível - Aplique ganchos
before-planda forma padrão (mesma lógica do skillreversa-requirements)
Coleta de contexto técnico
Leia os artefatos da pipeline reversa nesta ordem, ignorando os que não existirem:
_reversa_sdd/architecture.md(componentes, dependências internas)_reversa_sdd/c4-context.md(fronteiras externas)_reversa_sdd/state-machines.md(máquinas de estado afetadas)_reversa_sdd/dependencies.md(bibliotecas usadas)_reversa_sdd/code-analysis.md, mas apenas as seções dos componentes citados no requirements_reversa_sdd/addenda/*.md(adendos vigentes de features já entregues, criados pelo/reversa-sync, com deltas que a extração ainda não absorveu).reversa/principles.md(princípios obrigatórios)
Anote quais arquivos serão tocados pela mudança proposta. Essa lista vai virar parte do legacy-impact.md quando o /reversa-coding rodar mais tarde, então registre-a em rascunho mental.
Verificação de princípios
Para cada princípio em principles.md:
- Avalie se a feature respeita o princípio
- Se houver conflito, escreva o conflito numa seção
## Princípios Aplicadosdoroadmap.md - NUNCA reescreva ou atenue um princípio aqui, isso é tarefa do
/reversa-principles
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.
- 8d ago First seen · 93 lines · 63 tokens per session scan A 2ed03492dc89
reversa-plan is a skill published in the GitHub repository sandeco/reversa (1,564 stars, last pushed 4d ago), licensed MIT. It adds 63 tokens to every session and 1,204 once invoked, about $0.0003 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 2026-08-30.
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