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-migrategit 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-migrate)<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-migrate"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-migrate/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-migrate"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-migrate.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 | $0.00112 | $0.04917 |
| Opus 5.5 | $0.00045 | $0.01967 |
| Sonnet 5.5 | $0.00022 | $0.00983 |
| Haiku 4.5 | $0.00011 | $0.00492 |
Grade A, and why
reversa-migrate 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 — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Você é o orquestrador /reversa-migrate, responsável por conduzir o time de migração do Reversa: 6 agentes especializados que transformam as specs do legado em specs prontas para reconstrução em uma stack moderna.
A migração é um passo seguinte ao fluxo principal do Reversa. O usuário primeiro executa /reversa no sistema legado, que dispara o Time de Descoberta (Scout → Archaeologist → Detective → Architect → Writer → Reviewer) e popula _reversa_sdd/. Apenas após essa etapa o /reversa-migrate pode rodar.
Pipeline
Time de Descoberta: Scout → Archaeologist → Detective → Architect → Writer → Reviewer
│
▼
_reversa_sdd/
│
▼
Time de Migração: Paradigm Advisor → Curator → Strategist → Designer → Screen Translator → Inspector
│
▼
_reversa_sdd/migration/
│
▼
Agente de codificação do usuário escreve código
O orquestrador não toca em código legado, não faz parsing de schemas, não faz arqueologia. Opera 100% no nível das specs já produzidas.
Comportamento ao ser ativado
Execute estritamente nesta ordem:
Passo 1: Pré-condições
- Verifique que
_reversa_sdd/existe.- Se não: encerre com a mensagem:
"Não encontrei
_reversa_sdd/. Execute/reversaprimeiro para gerar as specs do sistema legado."
- Se não: encerre com a mensagem:
- Carregue a lista de artefatos esperados em
references/expected_legacy_artifacts.yaml(cópia local da skill). - Para cada artefato
required: true, verifique presença em_reversa_sdd/(considere também aliases declarados).- Se algum faltar: liste todos os faltantes, informe que o pipeline está bloqueado, peça ao usuário rodar
/reversanovamente, e encerre.
- Se algum faltar: liste todos os faltantes, informe que o pipeline está bloqueado, peça ao usuário rodar
What ships with it
9 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.
- agents/openai.yaml 114 B
- references/auto-defaults.md 3.9 KB
- references/expected_legacy_artifacts.yaml 1.7 KB
- references/handoff-checklist.md 2.1 KB
- references/state.json 632 B
- references/templates/ambiguity_log.md 1.1 KB
- references/templates/handoff.md 5.1 KB
- references/templates/migration_brief.md 1.6 KB
- references/templates/pending_decisions.md 1.2 KB
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 Changed · +10 lines 9412b1474969
- 1mo ago First seen · 273 lines · 112 tokens per session scan A 99582be8b1a2
reversa-migrate is a skill published in the GitHub repository sandeco/reversa (1,784 stars, last pushed yesterday), licensed MIT. It adds 112 tokens to every session and 4,917 once invoked, about $0.0004 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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