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Hugging FaceKnown publisherhuggingface/s2-cli/SKILL.md

s2-cli

Skill31 starsChanged 3 months agoApache-2.0View on GitHub

Semantic Scholar CLI (`s2`) for on-demand citation graph lookup: papers a work cites, papers that cite a work, and graph search across 200M+ papers. Use whenever the user asks for Semantic Scholar, S2, cited papers, references, bibliography, citing papers, citation count from Semantic Scholar, or papers outside a local catalog. Prefer `s2` over curl or ad-hoc Graph API requests.

  • Reads credentials

1 other project uses a version of this, 1 of them edited.

Adopted by

Most recently taken up by

  • Other versions1 project uses a version of this.

    Word for word · 0

    None found.

    Edited · 1

    1. huggingface/paperswithcode★ 31547% same

    Wrote their own version · 0

    None found.

    How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.

The file

We split this skill into the rules it gives an agent

7 rules. About 0 are common, 1 is distinctive, and 6 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 6

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    Use compact TSV for reading.

    line 12
  2. Very specific:

    Default --limit is 20. Search max --limit is 100.

    line 29
  3. Very specific:

    Use s2 search QUERY --limit 100 --json for graph-wide discovery.

    line 35
  4. Very specific:

    Run a second s2 search QUERY --year 2025-2026 --limit 100 --json for a recent slice.

    line 36
  5. Very specific:

    Use s2 refs PAPER for a bibliography and s2 citations PAPER for citing work.

    line 38
  6. Very specific:

    Do not curl api.semanticscholar.org while this CLI is available.

    line 41
  7. Distinctive:

    Default request pacing is 1.5s.

    line 47

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

The s2 CLI is read-only. It queries the Semantic Scholar Graph API and requires S2_API_KEY or PWC_SEMANTIC_SCHOLAR_API_KEY. Run s2 --help or a nested --help command when the live parser and this skill disagree; the parser is authoritative.

Install with uv tool install git+https://github.com/huggingface/s2-cli.git. Use compact TSV for reading. Add --json for programmatic filtering, joining, or schema-dependent processing.

PAPER accepts a modern or legacy arXiv ID, a DOI, a 40-character Semantic Scholar paper ID, a prefixed ID (ARXIV:, DOI:, CorpusId:, PMID:, URL:), an arXiv or Semantic Scholar URL, or a quoted title. Title matching uses Semantic Scholar's closest-title endpoint and prints a header with the matched title, ID, arXiv ID, and match score. If the header is wrong, rerun with an ID. Do not fall back to s2 search to resolve a specific paper.

Commands

  • s2 refs PAPER [--limit LIMIT] [--offset OFFSET] [--fields FIELDS] [--json] — papers this paper cites.
  • s2 citations PAPER [--limit LIMIT] [--offset OFFSET] [--fields FIELDS] [--json] — papers that cite this paper.
  • s2 search QUERY [--limit LIMIT] [--offset OFFSET] [--year YEAR] [--fields FIELDS] [--json] — search the Semantic Scholar graph.
  • s2 version — show CLI and API contract versions.

Default --limit is 20. Search max --limit is 100; refs/citations max is 1000. There is no --all. When stderr prints # more: rerun with --offset N, pass that offset. Citations must keep offset + limit <= 9999.

Research workflow

  1. Use s2 search QUERY --limit 100 --json for graph-wide discovery.
  2. Run a second s2 search QUERY --year 2025-2026 --limit 100 --json for a recent slice. Do not treat one search as both the classic and recent lists.
  3. Use s2 refs PAPER for a bibliography and s2 citations PAPER for citing work. Quote titles. Prefer ARXIV: IDs after the first resolution.
  4. Extract arXiv IDs from the arxiv TSV column or externalIds.ArXiv in JSON.
  5. Do not curl api.semanticscholar.org while this CLI is available.

Output and limits

  • Stable exit codes are 0 success, 2 invalid usage or missing key, 3 network/rate-limit failure, and 4 not found or invalid API response.
  • Default request pacing is 1.5s. Do not page citations of famous papers up to the 10k cap unless the user explicitly asks.

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