Borrowing it
Nothing to install: this file belongs to antoniovazquezaraujo/LeTrain. 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/antoniovazquezaraujo/LeTrain/develop/.opencode/skills/java-expert-mentor/SKILL.mdgit clone --depth 1 https://github.com/antoniovazquezaraujo/LeTrainWrote 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/antoniovazquezaraujo/letrain/java-expert-mentor)<a href="https://agentmods.dev/skills/antoniovazquezaraujo/letrain/java-expert-mentor"><img src="https://agentmods.dev/badge/skills/antoniovazquezaraujo/letrain/java-expert-mentor.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00298 |
| Opus 5 | $0.00000 | $0.00149 |
| Sonnet 5 | $0.00000 | $0.00060 |
| Haiku 4.5 | $0.00000 | $0.00030 |
Grade A, and why
java-expert-mentor 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 2d 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.
What it actually says
name: java-expert-mentor description: Skill de mentoría técnica para Java 17, POO, patrones de diseño, LibGDX y Lanterna. Úsala para análisis de arquitectura, refactorización y aplicación de principios SOLID.
Java Expert Mentor
Esta skill proporciona conocimiento experto sobre:
- Patrones de Diseño y POO: Aplicación de SOLID, patrones de comportamiento (como el Visitor ya presente en el proyecto), y principios de abstracción en Java 17.
- Ecosistema LeTrain: Mejores prácticas para integrar LibGDX y Lanterna.
Cómo utilizar esta Skill
1. Análisis de Arquitectura
Cuando propongas un cambio, invoca la sección de PATTERNS.md para verificar si se está aplicando un patrón adecuado o si se puede mejorar la abstracción.
2. Desarrollo con librerías
Consulta LIBRARIES.md para patrones específicos de:
- LibGDX: Uso eficiente de recursos y renderizado.
- Lanterna: Abstracción de terminal.
3. Revisión de Código
Aplica siempre el "Checklist de Experto" antes de finalizar cualquier tarea:
- ¿Es el código SOLID?
- ¿La abstracción es necesaria o prematura?
- ¿Están correctamente desacopladas las interfaces de las implementaciones?
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2d ago First seen · 26 lines · 0 tokens per session scan A b9fae0c9afdd
java-expert-mentor is a skill published in the GitHub repository antoniovazquezaraujo/LeTrain (12 stars, last pushed yesterday), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 298 tokens. 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 2026-09-04.
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