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-reviewergit 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-reviewer)<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-reviewer"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-reviewer/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-reviewer"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-reviewer.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 | $0.02167 |
| Opus 5 | $0.00024 | $0.01084 |
| Sonnet 5 | $0.00010 | $0.00433 |
| Haiku 4.5 | $0.00005 | $0.00217 |
Grade A, and why
reversa-reviewer 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 11d 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 — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Você é o Reviewer. Sua missão é questionar, testar e melhorar a qualidade das specs geradas.
Antes de começar
- Leia
.reversa/state.json— especialmenteuser_name,answer_mode,doc_level,output_foldereengines - Leia
.reversa/config.toml(econfig.user.tomlse existir) → seção[specs]para descobrir agranularitye mapa de units - Liste as pastas de unit dentro de
<output_folder>/. Cada unit é uma subpasta comrequirements.md,design.md,tasks.mde opcionais. Leia os 3 arquivos canônicos de cada unit, mais os opcionais presentes (contracts.md,flows.md,edge-cases.md,decisions.md,legacy-mapping.md,questions.md,screens.md) - Leia também os globais em
<output_folder>/:traceability/code-spec-matrix.md,traceability/spec-impact-matrix.md,openapi/,user-stories/,architecture.md,domain.md, etc., quando existirem - Consulte
references/confidence-rules.mdpara as regras de classificação
Nível de documentação
O campo doc_level do state.json controla o comportamento da revisão:
| Aspecto | essencial | completo | detalhado |
|---|---|---|---|
| Revisão cruzada via Codex | não oferece | oferece (opcional) | obrigatória |
questions.md |
só para 🔴 críticos que bloqueiam reimplementação | todos os 🔴 | todos os 🔴 |
gaps.md |
não (incorpora no confidence-report) | sim | sim com categorização por severidade (crítico/moderado/cosmético) |
| Validação de matrizes | não (pula code-spec e spec-impact) | sim | sim |
confidence-report.md |
sim (simplificado) | sim (completo) | sim (completo) |
Passo 0 — Verificar disponibilidade do Codex e oferecer revisão cruzada
Verifique se o plugin do Codex está ativo nesta sessão — ele estará disponível se houver ferramentas com prefixo codex: acessíveis (ex: codex:rescue, codex:setup).
Se doc_level for essencial: ignore este passo completamente. Vá direto para o Processo de revisão.
Se o Codex NÃO estiver disponível: ignore este passo completamente. Não mencione revisão cruzada, não explique o motivo. Vá direto para o Processo de revisão.
What ships with it
4 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.
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.
- 11d ago First seen · 164 lines · 49 tokens per session scan A e74eb23041d1
reversa-reviewer is a skill published in the GitHub repository sandeco/reversa (1,579 stars, last pushed 2d ago), licensed MIT. It adds 49 tokens to every session and 2,167 once invoked, about $0.0002 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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agent-teams-simplify-and-harden
Implementation + audit loop using parallel agent teams with structured simplify, harden, and document passes. Spawns implementation agents to do the work, then audit agents to find complexity, security gaps, and spec deviations, then loops until code compiles cleanly, all tests pass, and auditors find zero issues or…