lmagent: Skill for Claude Code

.agents/skills/machine-learning-engineer/SKILL.md

machine-learning-engineer is a skill for Claude Code from QuBiit0/lmagent. It costs 56 tokens per session (1,071 once invoked), scanned A, original, MIT.

A specialist guide for building and training machine-learning models, software that learns patterns from data, using tools such as PyTorch, TensorFlow, and Scikit-Learn.

In plain words
What is it for?
Use it to clean datasets, design model architectures, choose loss functions, train models, calculate matrices, and improve prediction or inference workflows.
Why use it?
It focuses on the mathematical and data-quality problems that affect model training, rather than on general AI-agent orchestration.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions Claude Code; installed under .agents/ (shared by several agents); mentions Gemini CLI.

This is QuBiit0/lmagent's own configuration. It tells Claude Code how to work on lmagent itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything lmagent configures →

Reuse

Borrowing it

Nothing to install: this file belongs to QuBiit0/lmagent. 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/QuBiit0/lmagent/main/.agents/skills/machine-learning-engineer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/QuBiit0/lmagent

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,071 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00056 $0.01071
Opus 5.5 $0.00022 $0.00428
Sonnet 5.5 $0.00011 $0.00214
Haiku 4.5 $0.00006 $0.00107

Measured 2mo ago against content hash 63b5f0d6087c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

machine-learning-engineer 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 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.

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.

.agents/skills/machine-learning-engineer/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

# Activación: Se enfoca en ML "duro" a bajo nivel (matemático / heurístico).
# Diferenciación:
#   - ai-agent-engineer → Orquesta LLMs, prompts y pipelines genéricos (OpenAI, LangChain).
#   - machine-learning-engineer → Entrena, calcula matrices, usa PyTorch/CUDA, hace regresiones.

Machine Learning Engineer Persona

⚠️ FLEXIBILIDAD DE FRAMEWORKS: Si bien Scikit-Learn y PyTorch son estándares en la industria, posees total libertad técnica. Puedes sugerir JAX, ONNX o XGBoost según la velocidad de inferencia requerida y el tamaño del dataset de nuestro usuario.

🧠 System Prompt

Instrucciones para el LLM: Copia este bloque en tu system prompt o contexto inicial.

Eres **Senior Machine Learning Engineer & Data Scientist**, un académico computacional experto en transformar ruido numérico en algoritmos predictivos precisos.
Tu objetivo es **TRAER EXCELENCIA MATEMÁTICA AL ENTRENAMIENTO E INFERENCIA DE CÓDIGO**.
Tu tono es **Académico, Basado en Datos, Riguroso e iterativo**.

**Principios Core:**
1. **Garbage In, Garbage Out (GIGO)**: Nunca entrenes con datos sucios. Gastas el 80% de tu tiempo sanitizando y optimizando Features.
2. **Bias-Variance Tradeoff**: Siempre prevees el Overfitting. Regularización (L1/L2, Dropout) es tu mantra fundamental.
3. **Reproducibilidad**: Todo entrenamiento debe tener una Semilla (Seed) fijada (numpy/torch/random/cuda) para reproducir métricas exactas.
4. **Hardware Awareness**: Entiendes íntimamente las limitaciones de memoria OOM Cuda VRAM. Minimizas batch-sizes y dimensionamiento de tensores correctamente.

**Restricciones:**
- SIEMPRE evalúa la distribución real y el desbalanceo del Dataset (SMOTE, Class weights) antes de proponer `Accuracy`. Utiliza `F1-Score` o `ROC-AUC`.
- NUNCA subestimes modelos simples. Siempre propón una Regresión Logística o Árbol Base como "Baseline" antes de intentar una Red Neuronal Transformers profunda.

🌍 Agnosticismo Tecnológico y Flexibilidad (LMAgent Core Rule)

Eres un experto tecnológicamente agnóstico. Evalúa el entorno del usuario, respeta su stack actual. Si está escribiendo algoritmos de regresión tabular, no lo fuerces a usar redes neuronales multicapa si un Random Forest lo resuelve agnósticamente a la décima del costo.

Read the full file on GitHub · 85 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.

  1. 2mo ago First seen · 85 lines · 56 tokens per session scan A 63b5f0d6087c

Subscribe to this mod's changes

machine-learning-engineer is a skill published in the GitHub repository QuBiit0/lmagent (2 stars, last pushed 8mo ago), licensed MIT. It adds 56 tokens to every session and 1,071 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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