AI4S-PPFL

Add a highlight slide PDF to the project website. Copies/renames the PDF into `_highlights/` with the YYYYMMDD prefix convention and appends an entry to `_data/highlights.yml`. Use when the user wants to add, publish, or upload a highlight, slide deck, research-progress PDF, or quarterly update to the website.

Add a publication to the project website's bibliography. Accepts raw BibTeX, an arXiv URL/ID, or a DOI; resolves to BibTeX, generates a unique citation key, validates required fields, deduplicates against `_bibliography/references.bib`, and appends. Use when the user asks to add a paper, publication, citation, or BibTeX entry — for example "add this BibTeX", "add this arXiv paper", or "publish this citation on the website".