What problem does it solve? Academic documents and research repositories often accumulate dead links, hallucinated YouTube video IDs, and paywalled DOI references that block readers. This Skill enforces a strict validation protocol so every URL, video, and paper citation in the PI-Guard repository is verified, accessible, and backed by an open-access full-text source. ## Core Features & Use Cases - Zero Dead Links Enforcement: Verifies every URL via HTTP GET/HEAD checks requiring HTTP 200/301/302 responses, and validates YouTube videos through the official oEmbed endpoint to confirm videos exist and are public. - Open-Access PDF Retrieval: Resolves DOIs through OpenAlex and Semantic Scholar APIs to automatically locate free full-text PDFs from arXiv or university repositories, preventing paywall-blocked citations. - Five-Step Academic Rigor Gate: Audits bibliographic provenance, venue/year accuracy, four-tier attribution, black-box scope compatibility, and local PDF archival with BibTeX logging. - Use Case: Before committing a research document citing an IEEE paper, run the verification script on the Markdown file to confirm all links return HTTP 200, then fetch the open-access PDF via the paper's DOI and add the dual-link citation format. ## Quick Start Ask the agent to verify all links in a Markdown file and find the open-access PDF for a given DOI using the repository's verification scripts.
