A greenfield project orchestrator that guides a new project from a plain-language idea through brainstorming, user personas, a PRD, and software specifications. In express mode, it continues through planning and implementation.

It helps start a new project, research intended users, draft requirements, create software-design documents, plan tasks, and optionally carry the work through coding.

It gives an idea a defined path toward buildable specifications or working code. Each stage produces documents that the next stage can use, reducing gaps between product intent and implementation.

reversa-new — Skill for Codex by sandeco

About the project

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.

sandeco/reversa · 1,567 stars · on GitHub

Install

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.

Any agent

npx skills add sandeco/reversa --skill reversa-new

Clone the repo

git clone --depth 1 https://github.com/sandeco/reversa

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/sandeco/reversa/reversa-new/github.svg)](https://agentmods.dev/skills/sandeco/reversa/reversa-new)

Your own site

<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-new"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-new/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/sandeco/reversa/reversa-new"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/reversa-new.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,804 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00086	$0.04804
Opus 5	$0.00043	$0.02402
Sonnet 5	$0.00017	$0.00961
Haiku 4.5	$0.00009	$0.00480

Measured 9d ago against content hash c035a2de7a87, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

reversa-new 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.

agents/reversa-new/SKILL.md · 329 lines

How it starts

The opening of the file, as written. The whole thing — 329 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Você é o orquestrador do time Code New Project Agents do Reversa. Sua missão é conduzir o pipeline greenfield, do "tenho uma ideia" até as specs SDD prontas para entrar no ciclo forward (modo guiado) ou até o código implementado (modo expresso).

Pipeline

/reversa-new (você está aqui)
       │
       ▼ chama
   reversa-ideator            → ideation.md
       │
       ▼ chama (guiado: após CONTINUAR | expresso: direto)
   reversa-researcher         → personas.md
       │
       ▼ chama (guiado: após CONTINUAR | expresso: direto)
   reversa-drafter            → prd.md
       │
       ▼ chama (guiado: após CONTINUAR | expresso: direto)
   reversa-spec-sdd           → sdd/<componente>.md
       │
       ├── modo guiado: handoff, sugere /reversa-forward
       │
       ▼ modo expresso: continua direto
   reversa-requirements       → <forward_folder>/<NNN>-<short>/requirements.md
       │
       ▼ (clarify pulado, [DÚVIDA] vira premissa 🟡)
   reversa-plan               → roadmap.md, investigation.md, ...
       │
       ▼
   reversa-to-do              → actions.md
       │
       ▼
   reversa-coding             → código + progress.jsonl + legacy-impact.md + regression-watch.md

No modo guiado você nunca executa um agente automaticamente sem CONTINUAR do usuário. No modo expresso, após o INICIAR da entrevista única, você é quem responde os handoffs (ver "Modo expresso").

Antes de começar

Leia .reversa/state.json. Se não existir, crie com defaults:
```
{
  "user_name": "",
  "chat_language": "pt-br",
  "doc_language": "Português",
  "project": "",
  "output_folder": "_reversa_sdd"
}
```
Se faltar user_name, peça antes de prosseguir (mesmo padrão de /reversa). Exceção: no modo expresso, essa coleta acontece no bloco 1 da entrevista única, não pergunte duas vezes.
Resolva output_folder a partir de state.json (padrão _reversa_sdd). Quando o texto deste SKILL.md menciona _reversa_sdd/, use o valor real.
Garanta que _reversa_sdd/ existe (criação recursiva, sem .gitkeep). Mesmo padrão do /reversa-forward.

Read the full file on GitHub · 329 lines

Files

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.

agents/openai.yaml 125 B

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.

9d ago First seen · 329 lines · 86 tokens per session scan A c035a2de7a87

Subscribe to this mod's changes

reversa-new is a skill published in the GitHub repository sandeco/reversa (1,567 stars, last pushed yesterday), licensed MIT. It adds 86 tokens to every session and 4,804 once invoked, about $0.0004 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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