file-classification

file-classification is a skill for Claude Code, Codex from cxcscmu/SkillLearnBench. It costs 19 tokens per session (432 once invoked), scanned A, original, MIT.

A keyword-scoring method for assigning academic papers and other documents to known subject categories.

In plain words
What is it for?
Use it to extract document text, compare it with category keyword sets, and assign the highest-scoring subject.
Why use it?
It provides a simple way to classify files by counting relevant terms instead of sorting them manually.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to extract document text, compare it with category keyword sets, and assign the highest-scoring subject.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cxcscmu/skilllearnbench/file-classification
Install

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.

Any agent
npx skills add cxcscmu/SkillLearnBench --skill file-classification
Clone the repo
git clone --depth 1 https://github.com/cxcscmu/SkillLearnBench

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for file-classification

README.md
[![agentmods](https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/file-classification.svg)](https://agentmods.dev/skills/cxcscmu/skilllearnbench/file-classification)
Your own site
<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/file-classification"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/file-classification.svg" alt="Measured on agentmods" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 432 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 $0.00019 $0.00432
Opus 5 $0.00010 $0.00216
Sonnet 5 $0.00004 $0.00086
Haiku 4.5 $0.00002 $0.00043

Measured 3d ago against content hash df1952d1f206, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

file-classification 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 3d 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.

skills/b1-one-shot-claude-opus-4-6/organize-messy-files/file-classification/SKILL.md · 34 lines

What it actually says

File Classification by Subject

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)
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. 3d ago First seen · 34 lines · 19 tokens per session scan A df1952d1f206

Subscribe to this mod's changes

file-classification is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 19 tokens to every session and 432 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 2026-09-03.