Verify citations and references in scientific documents to detect hallucinated or invalid sources. Extracts DOIs, URLs, arXiv IDs, PubMed IDs, and ISBNs from Markdown, LaTeX, org-mode, and plain text, then validates them using API lookups and web fetches.
Install
npx skills add jkitchin/skillz --skill citation-verifiernpx skills add jkitchin/skillz --skill citation-verifier -a claude-code -gnpx skills add jkitchin/skillz --skill citation-verifier -a codex -ggemini skills install https://github.com/jkitchin/skillz.git --path skills/citation-verifiergh skill install jkitchin/skillz citation-verifiergit clone --depth 1 https://github.com/jkitchin/skillz /tmp/jkitchin__skillz
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/jkitchin__skillz/skills/citation-verifier ~/.claude/skills/citation-verifier # Claude Code
cp -R /tmp/jkitchin__skillz/skills/citation-verifier ~/.agents/skills/citation-verifier # Codex, Cursor, Gemini CLI, Copilot, OpenCode