Borrowing it
Nothing to install: this file belongs to flpccabral/mcp-browser. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/flpccabral/mcp-browser/main/.claude/skills/browser-mcp-metodologia-e-prova/SKILL.mdgit clone --depth 1 https://github.com/flpccabral/mcp-browserWrote 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/flpccabral/mcp-browser/browser-mcp-metodologia-e-prova)<a href="https://agentmods.dev/skills/flpccabral/mcp-browser/browser-mcp-metodologia-e-prova"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-mcp-metodologia-e-prova/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/flpccabral/mcp-browser/browser-mcp-metodologia-e-prova"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-mcp-metodologia-e-prova.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00240 | $0.05896 |
| Opus 5 | $0.00120 | $0.02948 |
| Sonnet 5 | $0.00048 | $0.01179 |
| Haiku 4.5 | $0.00024 | $0.00590 |
Grade A, and why
browser-mcp-metodologia-e-prova 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 10d 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 — 387 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Metodologia e Prova — como transformar intuição em resultado aceito NESTE repo
Esta skill define a barra de evidência do projeto e fornece seis receitas de prova, cada uma com um exemplo resolvido extraído da história real deste repositório. A regra da casa em uma frase: prove, não apenas instale.
Público: engenheiro sem contexto prévio. Todos os comandos de verificação
rodam a partir da raiz do repo. Comandos git show referem-se ao commit
histórico cbc8e28 ("feat: 4 P0 fixes", 2026-07-10), que contém os relatórios
de investigação removidos do working tree atual.
Quando NÃO usar esta skill
- Triagem rápida de um bug em produção — use
browser-mcp-playbook-de-depuracao(esta skill é o rigor por trás da triagem, não a triagem em si). - Passar pelo gate formal de merge (testes obrigatórios, lint, README) —
use
browser-mcp-controle-de-mudancas. - Escolher o instrumento de medição (network log, HAR, screenshot,
accessibility tree) — use
browser-mcp-diagnosticos-e-ferramentas. - Consultar uma ideia já aposentada — o registro vive em
browser-mcp-arqueologia-de-falhas. - Rodar a suíte de testes formal / evidência de QA — use
browser-mcp-validacao-e-qa.
Parte A — Barra de evidência
A.1 Um mecanismo deve explicar TODAS as observações
Um mecanismo proposto só é aceito se explicar todas as observações, inclusive as negativas (o que NÃO aconteceu), e sobreviver a uma refutação adversarial designada (receita B.6).
Regras práticas:
- Liste as observações numeradas ANTES de propor o mecanismo — positivas e negativas ("o click falha em X" E "o click funciona em Y").
- Para cada observação, escreva como o mecanismo a explica. Uma observação sem explicação = mecanismo incompleto ou errado.
- Um mecanismo que explica só as observações convenientes é uma racionalização, não uma explicação.
Exemplo do padrão neste repo: os testes do agente cobrem tanto o caminho feliz
(test_execute_task_simple) quanto os negativos — teto de iterações
(test_max_iterations) e erros consecutivos (test_consecutive_errors) em
tests/test_agent.py. Um mecanismo de loop testado só no caminho de sucesso
poderia estar ignorando silenciosamente as condições de parada.
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.
- 10d ago First seen · 387 lines · 240 tokens per session scan A 7a0bfbe5b539
browser-mcp-metodologia-e-prova is a skill published in the GitHub repository flpccabral/mcp-browser (0 stars, last pushed 1mo ago), licensed MIT. It adds 240 tokens to every session and 5,896 once invoked, about $0.0012 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 2026-08-31.
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