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 Willian-2-0-0-1/os-control-mcp --skill os-controlgit clone --depth 1 https://github.com/Willian-2-0-0-1/os-control-mcpWrote 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/willian-2-0-0-1/os-control-mcp/os-control)<a href="https://agentmods.dev/skills/willian-2-0-0-1/os-control-mcp/os-control"><img src="https://agentmods.dev/badge/skills/willian-2-0-0-1/os-control-mcp/os-control/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/willian-2-0-0-1/os-control-mcp/os-control"><img src="https://agentmods.dev/badge/skills/willian-2-0-0-1/os-control-mcp/os-control.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 | $0.00029 | $0.00675 |
| Opus 5 | $0.00015 | $0.00338 |
| Sonnet 5 | $0.00006 | $0.00135 |
| Haiku 4.5 | $0.00003 | $0.00068 |
Grade A, and why
os-control 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 — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OS Control MCP
Modo autônomo
Quando o usuário pedir para trabalhar até concluir, crie um objetivo com
os_goal_start, usando autonomy: "autonomous", uma lista objetiva de
acceptance_criteria, max_steps e timeout_seconds.
Depois, mantenha o ciclo abaixo até o objetivo ficar completed, blocked,
failed ou cancelled:
- escolha uma ação pequena e in-scope;
- execute pela sessão vinculada usando
goal_id; - leia a saída nova com
os_read_output; - valide o resultado e registre evidências com
os_goal_update; - continue para
next_actionsem encerrar a conversa prematuramente.
Não marque completed apenas porque um comando retornou; comprove todos os
critérios. Se não houver progresso após tentativas razoáveis, marque blocked
com o motivo. Os limites do objetivo evitam loops infinitos, mas não são uma
aprovação manual.
Sessões
Use os_list_sessions antes de operar uma sessão existente. Confirme o
session_id, o shell e o diretório antes de enviar entrada.
O MCP suporta vários chats simultâneos. Quando o cliente fornecer um
identificador estável de conversa, preserve-o como client_id em todas as
chamadas para manter sessões e objetivos separados. Sem client_id, trate a
lista como estado compartilhado do servidor e nunca assuma que uma sessão
criada nesta conversa é a única sessão ativa.
Use os_send_input para digitar no terminal e os_read_output com o último
next_seq e next_offset para buscar apenas a saída nova. Pode usar
max_bytes grande quando a tarefa exigir saída extensa. Se a resposta vier
com has_more: true ou truncated: true, continue imediatamente usando os
cursores retornados; não descarte o restante nem marque a etapa como concluída.
Não trate o retorno de os_send_input como prova de que o comando terminou;
avalie a saída com os_read_output e o estado com os_session_status.
Em um objetivo autonomous, não peça confirmação a cada comando: o usuário
autorizou a execução contínua dentro dos limites do objetivo. Fora de um
objetivo autônomo, peça confirmação explícita antes de comandos destrutivos,
alteração de rede, instalação de software, encerramento de processos ou
encerramento de sessões. Nunca envie chaves, senhas ou tokens para o terminal.
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 · 61 lines · 29 tokens per session scan A 846adc37c881
os-control is a skill published in the GitHub repository Willian-2-0-0-1/os-control-mcp (0 stars, last pushed 12d ago), licensed MIT. It adds 29 tokens to every session and 675 once invoked, about $0.0001 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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