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-automacao-referencia/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-automacao-referencia)<a href="https://agentmods.dev/skills/flpccabral/mcp-browser/browser-automacao-referencia"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-automacao-referencia/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-automacao-referencia"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-automacao-referencia.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 | $0.00332 | $0.06698 |
| Opus 5 | $0.00166 | $0.03349 |
| Sonnet 5 | $0.00066 | $0.01340 |
| Haiku 4.5 | $0.00033 | $0.00670 |
Grade A, and why
browser-automacao-referencia 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 — 422 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Referência de Automação de Browser — a teoria por trás deste código
Este é o pacote de teoria do domínio que um engenheiro pleno normalmente
não tem, explicado como se aplica AQUI — não como livro-texto. Cada conceito
traz: definição curta, onde aparece neste repositório (arquivo:linha) e a
consequência prática. Fatos voláteis estão datados de 2026-07-12;
re-verifique com a última seção.
Esta skill é a teoria. As decisões de design que se apoiam nela estão em
browser-mcp-contrato-de-arquitetura. A aplicação prática (triagem de falhas)
está em browser-mcp-playbook-de-depuracao e browser-mcp-arqueologia-de-falhas.
Definições usadas uma vez, valendo para o documento inteiro:
- Substrato — a camada técnica que efetivamente controla o Chrome. Há três: Playwright gerenciado, CDP sobre Chrome existente, e extensão MV3 via WebSocket.
- Modo — o campo
BrowserManager._mode("playwright" | "cdp" | "extension"), declarado emsrc/browser_mcp/browser_manager.py:113. - Bridge — o par extensão Chrome + servidor WebSocket que liga o mundo Python
ao Chrome real do usuário (
extension/+src/browser_mcp/websocket_server.py).
1. MCP (Model Context Protocol)
O que é. MCP é um protocolo JSON-RPC em que um servidor expõe tools a um
client (o modelo/host). O transporte aqui é stdio: o processo servidor lê
requisições e escreve respostas pelos file descriptors padrão. Um client MCP
chama uma tool enviando name (string) + arguments (objeto JSON); o servidor
devolve conteúdo (aqui, TextContent).
Onde aparece.
- Transporte stdio e loop principal:
src/browser_mcp/server.py:77(stdio_server()) eserver.py:77(server.run(...)). - Handshake de listagem:
server.py:18-21—@server.list_tools()retornaapp.get_tools(). - Despacho de execução:
server.py:24-30—@server.call_tool()recebename: str, arguments: dicte roteia paraapp.call_tool(name, arguments). - Registro real das tools: decorator
@app.tool(...)emsrc/browser_mcp/tools.py(definição doToolRegistryemtools.py:19;get_tools()montatypes.ToolcominputSchemaemtools.py:49;call_tool()roteia por nome emtools.py:62).
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 · 422 lines · 332 tokens per session scan A b227dd3a7885
browser-automacao-referencia is a skill published in the GitHub repository flpccabral/mcp-browser (0 stars, last pushed 1mo ago), licensed MIT. It adds 332 tokens to every session and 6,698 once invoked, about $0.0017 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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