Preprint Update

Daily preprint monitor — arXiv, bioRxiv, medRxiv new papers + 30-day trending.

Features

• 📅 Today's new papers from arXiv, bioRxiv, and medRxiv
• 🔥 30-day trending — ranked by citation count via OpenAlex
• 🔗 Auto-generated clickable links to paper pages
• 📊 Formatted markdown + structured JSON output
• 🏷️ Category filtering for targeted searches
• 🔐 No API keys required — uses only free public APIs

Installation

Prerequisites

• Python 3.11+
• uv (auto-installs dependencies via PEP 723 inline metadata)

Clone this repository into your skills directory

For Claude Code users:

# Clone into your user skills folder
git clone https://github.com/<you>/Skills.git ~/Documents/Skills
# Or copy just this skill:
cp -r ~/Documents/Skills/preprint-update ~/.claude/skills/preprint-update

Standalone usage:

git clone https://github.com/<you>/Skills.git
cd Skills/preprint-update

Quick Start

cd preprint-update

# Today's new papers + trending
uv run python scripts/preprint_update.py all

# Only today's papers
uv run python scripts/preprint_update.py today

# Only trending (top 50)
uv run python scripts/preprint_update.py trending --limit 50

# With abstracts in output
uv run python scripts/preprint_update.py all --abstracts

# List available categories
uv run python scripts/preprint_update.py categories

Usage as a Claude Code Skill

When installed under ~/.claude/skills/preprint-update/, Claude Code will automatically load SKILL.md as context. Type /preprint-update or ask questions like:

• "What's new on bioRxiv today?"
• "Show me trending AI papers on arXiv this month"
• "Preprint update — genomics only"

Output Format

Markdown Report (preprint-update-YYYY-MM-DD.md)

# Preprint Update — 2026-06-29

## 📅 Today's New Papers

### arXiv — 42 papers
- **[Paper Title](https://arxiv.org/abs/2606.XXXXX)**
  — Author One, Author Two
  Categories: cs.AI, cs.LG, Date: 2026-06-29

## 🔥 30-Day Trending (Most Cited)
*(2026-05-30 → 2026-06-29)*

### arXiv — top 100

**1.** **[Towards Accurate Model Selection...](https://arxiv.org/abs/2606.04665)**
  — Kaichao You, Ximei Wang...
  Date: 2026-06-03, **Citations: 75**

JSON Output (preprint-update-YYYY-MM-DD.json)

{
  "date": "2026-06-29",
  "generated_at": "2026-06-29T12:00:00+00:00",
  "daily": {
    "arxiv": [{"title": "...", "authors": [...], "doi": "...", "categories": [...]}],
    "biorxiv": [...],
    "medrxiv": [...]
  },
  "trending": {
    "arxiv": [{"title": "...", "cited_by_count": 75, "publication_date": "..."}],
    "biorxiv": [...],
    "medrxiv": [...]
  }
}

Data Sources

Source	Daily API	Trending API	Rate Limit
arXiv	export.arxiv.org/api/query (Atom XML)	OpenAlex S4306400194	Polite, no key
bioRxiv	api.biorxiv.org/details/	OpenAlex S4306402567	No stated limit
medRxiv	api.medrxiv.org/details/	OpenAlex S4306400573	No stated limit
OpenAlex	—	api.openalex.org/works	100k/day (no key)

Available Categories

arXiv (default tracked)

q-bio.BM q-bio.CB q-bio.GN q-bio.MN q-bio.NC q-bio.NE q-bio.OT q-bio.PE q-bio.QM q-bio.SC q-bio.TO cs.AI cs.LG cs.NE cs.CL cs.CV cs.IR stat.ML stat.AP stat.ME physics.bio-ph physics.med-ph physics.chem-ph physics.data-an math.OC math.ST

bioRxiv

animal_behavior_and_cognition biochemistry bioengineering bioinformatics biophysics cancer_biology cell_biology developmental_biology ecology epidemiology evolutionary_biology genetics genomics immunology microbiology molecular_biology neuroscience pharmacology_and_toxicology physiology systems_biology (and more)

medRxiv

50+ medical categories including neurology oncology psychiatry cardiovascular_medicine infectious_diseases public_and_global_health (full list via categories command)

Known Limitations

• arXiv does not post papers on weekends; Monday covers Fri–Sun.
• bioRxiv posts daily (~30–100 papers/day), medRxiv fewer.
• OpenAlex citation counts lag 3–5 days — this ranking measures scholarly attention, not real-time buzz.
• The arXiv API submittedDate filter can be unreliable; we fetch by recency sort and filter client-side.

License

MIT License — see LICENSE file.

Contributing

Bug reports and feature requests are welcome. Please open an issue or PR.

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Built by gjhan. Uses data from arXiv, bioRxiv, medRxiv, and OpenAlex.