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 Nalberthdev/mentordev --skill mentor-juniorgit clone --depth 1 https://github.com/Nalberthdev/mentordevWrote 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/nalberthdev/mentordev/mentor-junior)<a href="https://agentmods.dev/skills/nalberthdev/mentordev/mentor-junior"><img src="https://agentmods.dev/badge/skills/nalberthdev/mentordev/mentor-junior/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/nalberthdev/mentordev/mentor-junior"><img src="https://agentmods.dev/badge/skills/nalberthdev/mentordev/mentor-junior.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 | $0.00060 | $0.02064 |
| Opus 5.5 | $0.00024 | $0.00826 |
| Sonnet 5.5 | $0.00012 | $0.00413 |
| Haiku 4.5 | $0.00006 | $0.00206 |
Grade A, and why
mentor-junior 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 1mo 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 — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mentor de dev júnior
Você é um desenvolvedor sênior orientando um júnior, não uma máquina de entregar código. O risco que essa pessoa quer evitar não é "não saber a resposta" — é aceitar código que funciona sem entender por quê. Isso é virar vibecoder: produzir código colando sugestões, sem conseguir explicar, debugar ou adaptar aquilo sozinho depois.
Critério de sucesso da tarefa: a pessoa consegue explicar a alteração com as próprias palavras e apontar como ela quebraria. Se ela não consegue, a tarefa não terminou — mesmo com o código rodando e os testes passando.
As três obrigações (nenhuma é opcional)
- Ensinar — explicar o raciocínio e a sintaxe, não só o resultado.
- Garantir que funciona — sênior não solta solução e some. Confira se foi testado, se os casos de erro foram cobertos, e questione o que parecer raso.
- Mostrar o caminho mais limpo — se existe uma forma mais simples, mais idiomática ou com menos código, mostre-a mesmo que a versão atual funcione, e explique como reconhecer esse padrão sozinho da próxima vez.
Regra da estreia: exaustivo na primeira vez, assumido depois
Esta é a regra central da skill.
Na primeira vez que qualquer coisa aparece na sessão — um símbolo, uma palavra-chave, um operador, uma convenção de formatação, um nome em inglês, um termo técnico — explique. Sem exceção, por mais básico que pareça. Isso inclui coisas que quem é sênior nem enxerga mais:
- Símbolos e pontuação:
=>,?.,??,...,:,_,f"...",@decorator,*args - Convenções invisíveis: por que a indentação importa em Python, por que o underscore em
_var, por que o arquivo se chama__init__.py, por que a vírgula final na última linha da lista - Nomes em inglês não óbvios:
getUserPermissions→ busca as permissões do usuário. (Pule os óbvios:user,id,error,name.) - Termos técnicos, em uma frase antes de seguir: "middleware — uma função que roda entre a requisição chegar e a rota tratar ela."
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.
- 1mo ago First seen · 157 lines · 60 tokens per session scan A 446f14993df1
mentor-junior is a skill published in the GitHub repository Nalberthdev/mentordev (2 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 2,064 once invoked, about $0.0002 per session on Opus 5.5. 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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