What is browser-mcp-build-e-ambiente?

A Portuguese guide for rebuilding the browser-mcp-server development environment from a fresh checkout. It covers the virtual environment, installation, Chromium setup, and common Python-version differences between local work and continuous-integration tests.

Use it for initial setup or when browser tests fail after cloning. It covers pytest checks and points to separate guides for operation, configuration, debugging, architecture, and quality checks.

It helps distinguish a broken setup from known repository problems before debugging the code itself.

How flpccabral/mcp-browser configures Claude Code

Reuse

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.

Copy the file

curl -O https://raw.githubusercontent.com/flpccabral/mcp-browser/main/.claude/skills/browser-mcp-build-e-ambiente/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/flpccabral/mcp-browser

Made for: Claude Code.

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/flpccabral/mcp-browser/browser-mcp-build-e-ambiente/github.svg)](https://agentmods.dev/skills/flpccabral/mcp-browser/browser-mcp-build-e-ambiente)

Your own site

<a href="https://agentmods.dev/skills/flpccabral/mcp-browser/browser-mcp-build-e-ambiente"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-mcp-build-e-ambiente/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/flpccabral/mcp-browser/browser-mcp-build-e-ambiente"><img src="https://agentmods.dev/badge/skills/flpccabral/mcp-browser/browser-mcp-build-e-ambiente.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 153 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,793 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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	$0.00153	$0.02793
Opus 5.5	$0.00061	$0.01117
Sonnet 5.5	$0.00031	$0.00559
Haiku 4.5	$0.00015	$0.00279

Measured 2mo ago against content hash c7af4ad6a77c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

browser-mcp-build-e-ambiente scanned grade C with 1 finding 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 2mo 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf dist/

.claude/skills/browser-mcp-build-e-ambiente/SKILL.md · 244 lines

How it starts

The opening of the file, as written. The whole thing — 244 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build e ambiente do browser-mcp-server

Guia para recriar o ambiente de desenvolvimento do zero e reconhecer os sintomas de ambiente quebrado vs dívida conhecida do repositório.

Termos usados uma vez e reaproveitados:

repo raiz — diretório que contém pyproject.toml.
suíte completa — pytest tests/ (43 testes em 3 arquivos).
testes de browser — os testes de tests/test_smoke.py, tests/test_tools.py e a maioria de tests/test_agent.py, que iniciam um Chromium real via browser_manager.start().

Quando NÃO usar esta skill

Necessidade	Use em vez desta
Rodar/operar o servidor MCP, modos de execução	`browser-mcp-executar-e-operar`
Catálogo completo de variáveis de ambiente e flags	`browser-mcp-config-e-flags`
Depurar comportamento em runtime	`browser-mcp-playbook-de-depuracao`
Entender falha histórica ou regressão	`browser-mcp-arqueologia-de-falhas`
Regras de arquitetura e limites de mudança	`browser-mcp-contrato-de-arquitetura` / `browser-mcp-controle-de-mudancas`
Validação/QA de uma mudança	`browser-mcp-validacao-e-qa`
Referência das ferramentas de automação	`browser-automacao-referencia`
Diagnóstico com ferramentas embutidas	`browser-mcp-diagnosticos-e-ferramentas`

Requisitos

Item	Valor	Fonte
Python mínimo	`>= 3.11`	`pyproject.toml` (`requires-python`)
Python no CI	matriz 3.11 / 3.12 / 3.13	`.github/workflows/ci.yml`
Python no `.venv` local	3.14 (verificado em 2026-07-12)	`.venv/bin/python --version`
Build backend	hatchling	`pyproject.toml` `[build-system]`
Pacote	`src/browser_mcp`	`[tool.hatch.build.targets.wheel]`
Entry point CLI	`browser-mcp-server = browser_mcp.server:main`	`[project.scripts]`
Pytest	`asyncio_mode = "auto"`, `testpaths = ["tests"]`	`[tool.pytest.ini_options]`

Diferença local vs CI: o .venv do repo roda Python 3.14, mas o CI só testa 3.11–3.13 e os classifiers do pyproject.toml param em 3.13. Algo que passa localmente pode se comportar diferente nas versões oficialmente suportadas — na dúvida, trate 3.11–3.13 como o alvo de compatibilidade. Confirme sua versão antes de investigar qualquer diferença de comportamento:

Read the full file on GitHub · 244 lines

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.

2mo ago First seen · 244 lines · 153 tokens per session scan C c7af4ad6a77c

Subscribe to this mod's changes

browser-mcp-build-e-ambiente is a skill published in the GitHub repository flpccabral/mcp-browser (0 stars, last pushed 3mo ago), licensed MIT. It adds 153 tokens to every session and 2,793 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Browser automation

browser-mcp-build-e-ambiente next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
browser-mcp-build-e-ambienteflpccabral/mcp-browser	Skill	0	3mo ago	MIT	C	153	Claude Code
interactive-loginyc-software/qm	Skill	16k	yesterday	MIT	A	46	Claude Code, Codex
pinchtab-mcppinchtab/pinchtab	Skill	11k	10d ago	MIT	A	52	Claude Code, Codex
azure-messaging-webpubsub-javamicrosoft/skills	Skill	3.2k	yesterday	MIT	A	43	Claude Code
cua-driverdavidondrej/skills	Skill	4.3k	3d ago	MIT	A	68	Claude Code, Codex
open-design-browsercompozy/compozy	Skill	2.8k	yesterday	MIT	A	56	Claude Code, Codex
southwestborski/travel-hacking-toolkit	Skill	895	yesterday	MIT	A	40	Claude Code

mcp-browser: Skill for Claude Code