crossref-lookuplisted

# Crossref Lookup Use this skill for citation metadata work backed by the Crossref REST API. ## Instructions 1. Prefer this skill when the user needs DOI validation, title search, citation metadata, or bibliography auditing. 2. Use the bundled CLI: - In this repository: `skills/crossref-lookup/scripts/lookup` - After installation: `~/.agents/skills/crossref-lookup/scripts/lookup` 3. Choose the narrowest mode that matches the request: - `--doi` for validating or enriching one DOI - `--title` for title-to-DOI discovery - `--validate-file` for one DOI per line - `--audit-bibliography` for a bibliography file such as `.bib` or plain text 4. Normalize DOI strings before interpreting failures. - Acceptable raw forms include `10.xxxx/...`, `doi:10.xxxx/...`, and `https://doi.org/10.xxxx/...` 5. If the user has a contact email for polite-pool requests, pass it with `--email`. 6. Treat Crossref as citation metadata, not full text. - If exact abstract-page wording, final pagination, or publisher formatting matters, verify the shortlisted record on the publisher or DOI landing page. 7. When title search returns multiple plausible records, keep the ambiguity explicit instead of selecting a match silently. 8. Use `--strict` for audits that must fail on malformed, missing, or unresolved records. Exit code 2 denotes a transient service/network failure; exit code 1 denotes invalid, missing, or other audit failures. ## Quick Reference | Task | Action | |----