File Classification by Subject

SkillFiles & storage

Classify academic papers and documents into subject categories using keyword-based text analysis.

Available today. Use it from your connected AI after setup.

Connect ahel once, and every AI you use reads what you have installed.

Then ask your AI: use the File Classification by Subject skill

What this skill tells your AI

The instructions your AI receives, as published by cxcscmu/skilllearnbench in skills/b1-one-shot-claude-opus-4-6/organize-messy-files/file-classification/SKILL.md and read by ahel’s review.

Approach: Keyword Scoring

For classifying documents into known categories, a keyword scoring approach is effective:

  1. Define keyword sets for each category
  2. Extract text from each document
  3. Score text against each keyword set (count occurrences)
  4. Assign document to highest-scoring category

Keyword Sets for This Task

  • LLM: language model, transformer, attention mechanism, GPT, BERT, token, prompt, fine-tuning, NLP, neural network, deep learning, text generation, embedding, LLM, large language, reinforcement learning from human feedback, RLHF, instruction tuning, pretraining, machine learning
  • Trapped ion / Quantum computing: trapped ion, quantum computing, qubit, quantum gate, entanglement, quantum error, ion trap, quantum circuit, quantum algorithm, quantum processor, quantum information, Coulomb, motional mode, laser cooling, quantum simulation
  • Black hole: black hole, event horizon, Hawking radiation, singularity, gravitational, spacetime, general relativity, accretion, Schwarzschild, Kerr, entropy, holographic, AdS/CFT, cosmological, dark energy, dark matter
  • DNA: DNA, genome, gene expression, nucleotide, protein, sequencing, CRISPR, mutation, chromosome, transcription, RNA, epigenetic, genetic, molecular biology, bioinformatics, cell, amino acid
  • Music history: music, composer, symphony, opera, baroque, classical period, jazz, rhythm, harmony, melody, instrument, musicology, sonata, concert, orchestra, musical

Implementation Pattern

def classify(text, keyword_sets):
    text_lower = text.lower()
    scores = {}
    for category, keywords in keyword_sets.items():
        scores[category] = sum(text_lower.count(kw.lower()) for kw in keywords)
    return max(scores, key=scores.get)

Signals

GitHub stars
83
Forks
5
Last commit
Jul 2026
Advanced
Catalog kind
skill
Gateway key
file-classification
Source
github.com/cxcscmu/skilllearnbench