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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.
s2-cli is an agent skill entry in ChatHome Skills, sourced from GitHub Skill Search and scored 58/100. 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 `-. As an agent skill, it packages a reusable instruction set that AI coding agents such as Codex and Claude Code can load to perform this task without hand-written glue code. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding s2-cli to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
codex skill install huggingface/s2-cliReview the upstream source before running this command.
Scan coverage: Install metadata and the indexed document body.
Automated signals from install metadata and a bounded skill body — not a full code security audit and not a recursive source or dependency review.
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