---

name: papers description: | Search scientific papers on arXiv, OpenAlex, Scopus and Semantic Scholar. Use when the user wants to search, explore or save academic papers.

USE THIS SKILL FOR ALL:

• Search scientific papers, academic articles, recent research
• Explore ML, AI, NLP, Computer Vision literature
• Save papers to Second Brain vault
• Find paper citations and references
• Discover new papers on specific topics
• Search specific paper by DOI

TRIGGERS: papers, paper, artigo, artigos, pesquisa, literatura, arxiv, openalex, scopus, semantic scholar, buscar paper, papers sobre, quero ler sobre, o que tem de novo em, salva esse paper, papers recentes, citacoes, quem cita, referencias, search papers, find papers, academic search, literature review, citations, references, save paper, recent papers, what's new in

Papers Search Skill

Search scientific papers using scimesh via uvx (no global installation required).

Environment Variables

Variable	Required	Description
SCOPUS_API_KEY	For Scopus	Elsevier API key (+ institutional VPN)
SEMANTIC_SCHOLAR_API_KEY	Optional	For higher rate limits on Semantic Scholar
UNPAYWALL_EMAIL	For download	Email for Unpaywall API

Available Providers

Provider	API Key	Notes	search	get	citations
arXiv	No	Preprints	Y	Y	N
OpenAlex	No	61M+ papers, largest open DB	Y	Y	Y
Scopus	SCOPUS_API_KEY	Requires institutional access	Y	Y	Y (in)
Semantic Scholar	Optional	200M+ papers, citation graph	Y	Y	Y

Basic Usage

Execute commands directly with uvx scimesh:

# Search with field operators
uvx scimesh search "TITLE(transformer)"

# Plain text also works (searches in title AND abstract)
uvx scimesh search "transformers"
uvx scimesh search "attention mechanism"

Triggers

• "search papers about X"
• "papers about Y"
• "I want to read about Z"
• "recent papers on W"
• "what's new in transformers?"
• "save this paper to vault"

Search Flow

1. Understand the intent: extract topic/query from user message
2. Refine with questions (use AskUserQuestion):
   • Year filter? (2024 / 2023-2024 / 2020-2024 / Run search)
   • Specific area? (ML / NLP / CV / Run search)
   • Preferred sources? (All / arXiv / OpenAlex / Run search)
   • IMPORTANT: Always include "Run search" as an option so the user can skip refinements
3. Connectivity check (BEFORE executing search):

   {
       "questions": [
           {
               "question": "Are you connected to institutional VPN?",
               "header": "VPN",
               "options": [
                   {"label": "Yes, VPN active", "description": "Better access to papers"},
                   {"label": "No VPN", "description": "Will use Open Access only"},
                   {"label": "Wait, connecting...", "description": "Pause for VPN connection"}
               ],
               "multiSelect": False
           }
       ]
   }
   

   • If user chooses "Wait", pause and ask again when ready
4. Execute search using Scopus syntax:

   uvx scimesh search "TITLE(transformer) AND PUBYEAR > 2020" -p arxiv,openalex -n 20
   

5. Present results in a readable format

Full Paper Reading Flow

When the user wants to read a complete paper (fullpaper):

1. Pre-Download Check

BEFORE downloading, ask about connectivity and Sci-Hub in a single batch:

{
    "questions": [
        {
            "question": "Are you connected to institutional VPN?",
            "header": "VPN",
            "options": [
                {"label": "Yes, VPN active", "description": "Institutional access enabled"},
                {"label": "No VPN", "description": "Will try Open Access only"},
                {"label": "Wait, connecting...", "description": "Pause for VPN connection"}
            ],
            "multiSelect": False
        },
        {
            "question": "Enable Sci-Hub as fallback if Open Access fails?",
            "header": "Sci-Hub",
            "options": [
                {"label": "No (Rec)", "description": "Only legal Open Access sources"},
                {"label": "Yes", "description": "Use --scihub flag (at your own risk)"}
            ],
            "multiSelect": False
        }
    ]
}

• If user chooses "Wait, connecting...", pause and ask again when ready
• If user enables Sci-Hub, add --scihub flag to download commands

2. Download the PDF

Use the scimesh download command (requires UNPAYWALL_EMAIL):

# Download via DOI (tries Open Access via Unpaywall)
uvx scimesh download "10.1234/example" -o {papers_dir}/

# With Sci-Hub fallback (use at your own risk)
uvx scimesh download "10.1234/example" --scihub -o {papers_dir}/

# Download multiple DOIs from file
uvx scimesh download -f dois.txt -o {papers_dir}/

# Search + Download directly (pipe)
uvx scimesh search "TITLE(paper)" -f json | uvx scimesh download -o {papers_dir}/

# For arXiv papers, use DOI in the format: 10.48550/arXiv.XXXX.XXXXX

PDF Caching: PDFs are automatically cached in ~/.scimesh/cache/pdfs/ - avoids re-download.

Manual alternatives:

• arXiv: https://arxiv.org/pdf/XXXX.XXXXX
• Generic DOI: Check the pdf_url field in search results

2. Folder Structure

Ask user where to save papers (if not already configured):

{
    "question": "Where should I save papers?",
    "header": "Papers dir",
    "options": [
        {"label": "Current directory", "description": "./papers/"},
        {"label": "Documents", "description": "~/Documents/papers/"},
        {"label": "Custom path", "description": "You specify"}
    ],
    "multiSelect": False
}

Save in {papers_dir}/ with the structure:

{papers_dir}/
  <year>-<first-author>-<short-title>/
    fullpaper.pdf
    README.md

Note: {papers_dir} is user-defined. Examples: ./papers/, ~/Documents/papers/, ~/brain/08-papers/

Example: 2024-wang-treb/

3. Read the PDF

• Use Read tool directly on the .pdf file (native Claude Code support)
• No need for pdftotext, PyMuPDF, or other Python libs
• Claude Code extracts text + renders figures page by page

4. Systematic Reading Structure

1. Abstract - understand the main claim
2. Figures/Tables - often tell the story before the text
3. Methodology - how they did it
4. Results - specific metrics, comparisons with baselines
5. Limitations - what the authors admit (or omit)

5. Critical Verification Checklist

• Compares with relevant baselines?
• Uses standard metrics for the field?
• Tests on multiple datasets?
• Reports standard deviation/confidence intervals?
• Code available?
• Limitations section exists?

6. Common Red Flags

• Empty or superficial "Evaluation" sections
• Only one dataset
• Non-standard or invented metrics
• No quantitative comparison with existing methods
• Strong claims without proportional evidence

Save Flow

When the user asks to save a paper:

1. Get complete details (use previous search result or search by DOI/arXiv ID)

2. Create paper folder:

   mkdir -p {papers_dir}/<year>-<author>-<title>/
   

3. Download PDF (if available):

   uvx scimesh download "DOI" -o {papers_dir}/<year>-<author>-<title>/
   

4. Create README.md in the folder with the format:

   ---
   title: "Paper Title"
   authors: [Author 1, Author 2]
   year: 2024
   doi: 10.1234/example
   arxiv: 2401.12345
   tags: [paper, area, subtopic]
   saved: YYYY-MM-DD
   ---
   
   ## Summary
   
   [Generated summary - 2-3 accessible paragraphs]
   
   ## Original Abstract
   
   [Paper abstract]
   
   ## Methodology
   
   [Methodology description]
   
   ## Results
   
   [Main results and metrics]
   
   ## Critical Evaluation
   
   ### Strengths
   - [...]
   
   ### Limitations
   - [...]
   
   ## Links
   
   - [arXiv](url)
   - [PDF](./fullpaper.pdf)
   - [GitHub](url) (if available)
   
   ## Connections
   
   - [[related-note-1]]
   - [[related-note-2]]
   
   ## Notes
   
   [Space for personal annotations]
   

5. Suggest connections with other vault notes

Available Commands

Search Paper by DOI

# Search specific paper by DOI (merge from multiple providers)
uvx scimesh get "10.1038/nature14539"

# From specific providers
uvx scimesh get "10.1038/nature14539" -p openalex,semantic_scholar

# Export to BibTeX
uvx scimesh get "10.1038/nature14539" -f bibtex -o paper.bib

# arXiv paper by ID
uvx scimesh get "1706.03762" -p arxiv

Search Citations

# Papers that cite a DOI (incoming citations)
uvx scimesh citations "10.1038/nature14539" --direction in

# Papers cited by a DOI (references/outgoing)
uvx scimesh citations "10.1038/nature14539" --direction out

# Both directions
uvx scimesh citations "10.1038/nature14539" --direction both

# From specific providers (openalex, semantic_scholar, scopus)
uvx scimesh citations "10.1038/nature14539" -p semantic_scholar -n 50

# Export to JSON
uvx scimesh citations "10.1038/nature14539" -f json -o citations.json

Search with Scopus Syntax

# Search by title
uvx scimesh search "TITLE(transformer)"

# Search with multiple filters
uvx scimesh search "TITLE(transformer) AND AUTHOR(Vaswani)"

# Filter by year
uvx scimesh search "TITLE(attention) AND PUBYEAR > 2020"
uvx scimesh search "TITLE(BERT) AND PUBYEAR = 2024"

# Search in abstract
uvx scimesh search "TITLE-ABS-KEY(reinforcement learning)"

# Fulltext search
uvx scimesh search "ALL(CRISPR gene editing)"

# Combine operators
uvx scimesh search "TITLE(transformer) AND AUTHOR(Bengio) AND PUBYEAR > 2020"

# Negation
uvx scimesh search "TITLE(deep learning) AND NOT TITLE(survey)"

# Group conditions
uvx scimesh search "(TITLE(transformer) OR TITLE(attention)) AND PUBYEAR = 2024"

Command Line Options

# Limit number of results per provider
uvx scimesh search "TITLE(transformer)" -n 20

# Limit total results
uvx scimesh search "TITLE(transformer)" -t 50

# Choose providers (arxiv, openalex, scopus, semantic_scholar)
uvx scimesh search "TITLE(transformer)" -p arxiv,openalex,semantic_scholar

# Export to BibTeX
uvx scimesh search "TITLE(transformer)" -f bibtex -o papers.bib

# Export to RIS
uvx scimesh search "TITLE(transformer)" -f ris -o papers.ris

# Export to CSV
uvx scimesh search "TITLE(transformer)" -f csv -o papers.csv

# Export to JSON
uvx scimesh search "TITLE(transformer)" -f json -o papers.json

# Search + Download directly (pipe)
uvx scimesh search "TITLE(transformer)" -f json | uvx scimesh download -o papers/

# Disable deduplication
uvx scimesh search "TITLE(transformer)" --no-dedupe

Local Indexing for Fulltext

For fulltext search on providers without native support (Semantic Scholar):

# Index local PDFs
uvx scimesh index ./papers/

# Clear and re-index
uvx scimesh index ./papers/ --clear

# Now ALL() uses local index + native APIs
uvx scimesh search "ALL(attention mechanism)"

The index is stored in ~/.scimesh/fulltext.db using SQLite FTS5.

Available Search Fields

Field	Syntax	Example
Plain text	term	transformers (searches in title AND abstract)
Title	TITLE(x)	TITLE(transformer)
Author	AUTHOR(x) or AUTH(x)	AUTHOR(Vaswani)
Abstract	ABS(x)	ABS(attention mechanism)
Keywords	KEY(x)	KEY(machine learning)
Title+Abstract	TITLE-ABS(x)	TITLE-ABS(neural network)
Title+Abstract+Keywords	TITLE-ABS-KEY(x)	TITLE-ABS-KEY(neural network)
Fulltext	ALL(x)	ALL(CRISPR gene editing)
Year	PUBYEAR	PUBYEAR = 2024, PUBYEAR > 2020, PUBYEAR >= 2020
DOI	DOI(x)	DOI(10.1234/example)

Logical Operators

Operator	Example
AND	TITLE(a) AND AUTHOR(b)
OR	TITLE(a) OR TITLE(b)
AND NOT	TITLE(a) AND NOT TITLE(survey)
Grouping	(TITLE(a) OR TITLE(b)) AND PUBYEAR = 2024

Interaction Examples

User: "I want to see papers about RLHF"

Skill:

1. Ask: "Do you want to filter by year?" with options [2024, 2023-2024, 2020-2024, Run search]
2. If user chooses year, ask next filter or execute
3. Execute:

   uvx scimesh search "TITLE-ABS-KEY(RLHF) AND PUBYEAR > 2022" -n 20
   

4. Present formatted results

User: "papers about transformers in 2024"

Skill:

uvx scimesh search "TITLE(transformer) AND PUBYEAR = 2024" -n 20

User: "papers by Bengio about deep learning"

Skill:

uvx scimesh search "AUTHOR(Bengio) AND TITLE(deep learning)" -n 20

User: "save the second one to vault"

Skill:

1. Get data from the second paper of the last search
2. Create folder: {papers_dir}/2024-author-title/
3. Download PDF: fullpaper.pdf (if available via Open Access)
4. Generate README.md with complete summary
5. Suggest tags and connections

User: "read this paper for me"

Skill:

1. Use Read tool on fullpaper.pdf
2. Follow systematic reading structure
3. Apply critical verification checklist
4. Identify red flags if any
5. Update README.md with complete analysis

User: "export the search to bibtex"

Skill:

uvx scimesh search "TITLE(transformer)" -f bibtex -o papers.bib