paper-filter

paper-filter is a skill for Claude Code from FrontisAI/NatureBench. It costs 54 tokens per session (1,304 once invoked), scanned A, original, MIT.

A screening process for finding papers about the central nervous system that contain a machine-learning task suitable for benchmark creation. It checks the task, how results are measured, and whether the necessary data is available.

In plain words
What is it for?
Use it to decide whether a paper passes the task, evaluation, and data-availability checks, while consulting supplementary files when key details are missing.
Why use it?
It prevents unsuitable papers from moving further through the workflow and stops checking as soon as a paper fails a requirement.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: agent in frontmatter.

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.

agentmods
npx agentmods add skills/frontisai/naturebench/paper-filter
Any agent
npx skills add FrontisAI/NatureBench --skill paper-filter
Clone the repo
git clone --depth 1 https://github.com/FrontisAI/NatureBench

Made for: Claude Code.

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 paper-filter

README.md
[![agentmods](https://agentmods.dev/badge/skills/frontisai/naturebench/paper-filter.svg)](https://agentmods.dev/skills/frontisai/naturebench/paper-filter)
Your own site
<a href="https://agentmods.dev/skills/frontisai/naturebench/paper-filter"><img src="https://agentmods.dev/badge/skills/frontisai/naturebench/paper-filter.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,304 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00054 $0.01304
Opus 5 $0.00027 $0.00652
Sonnet 5 $0.00011 $0.00261
Haiku 4.5 $0.00005 $0.00130

Measured 6d ago against content hash 16779320945f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

paper-filter 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 6d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/estimate_size.py, scripts/validate_links.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

naturegym/.claude/skills/paper-filter/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Paper Filter Skill

Filter CNS papers for machine learning task extraction suitability.

Input Requirements

Before invoking this skill, provide:

  1. Paper Folder Path: Directory containing original paper files and preprocessed data
  2. Output Directory: Directory to store filtering results

Paper folder structure:

  • {paper_id}.pdf: Original paper PDF file
  • {paper_id}.html: HTML version of the paper
  • preprocessed/: Preprocessed data subdirectory, containing:
    • text.md: Full paper text
    • figures/: Figures directory
    • tables/: Tables directory
    • links.json: List of links from the paper (with section identifiers and surrounding context)

Supplementary Materials

preprocessed/text.md may not include supplementary content. When the main text references supplementary materials (tables, figures, or supplementary notes/text) for core results, metric details, evaluation protocols, or experimental details, and the information is not present in preprocessed/text.md:

  1. Check preprocessed/links.json for supplementary material links (section: supplementary_information)
  2. Download supplementary PDFs/files to a temporary location
  3. Use the original paper PDF/HTML as fallback if supplementary links are not separately available
  4. Extract relevant information (score tables, metric details, evaluation protocols, experimental details, and dataset descriptions)
  5. Delete downloaded supplementary files after extraction is complete

Workflow

Phase 1: Understand Core Definitions

Read references/core_definitions.md to understand the basic criteria and requirements for task extraction.

Core definitions describe the structure of the candidate task tuple T = (A, Data, M, S, B):

  • A (Algorithm): The core algorithm or strategy proposed by the paper
  • Data: The data environment involved in the task, divided into D_dev (development data) and D_eval (evaluation data)
  • M (Metric): The metric function used to measure result quality
  • S (SOTA): The performance values of the proposed core algorithm on evaluation metrics
  • B (Baseline): The baseline metric values reported in the paper (optional, may not exist)

Read the full file on GitHub · 115 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. 6d ago First seen · 115 lines · 54 tokens per session scan A 16779320945f

Subscribe to this mod's changes

paper-filter is a skill published in the GitHub repository FrontisAI/NatureBench (112 stars, last pushed yesterday), licensed MIT. It adds 54 tokens to every session and 1,304 once invoked, about $0.0003 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 2026-08-30.

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