What problem does it solve? Academic paper directories accumulate stale PDFs from old pipelines, mismatched filenames, and broken bibliography references that cause LaTeX compilation failures. This Skill systematically reconciles PDF files against the current references.bib, archives unrelated files, and restores a clean compilable state. ## Core Features & Use Cases - Content-Verified PDF Matching: Compares each subdirectory PDF against BibTeX entries using pdfinfo metadata (title, author, year) instead of assuming filename correspondence, archiving mismatches to _archive/ rather than deleting them. - Ordered Bib Cleanup: Enforces a strict sequence of cleaning invalid bib entries, removing stale \cite{} references from .tex files, then recompiling with pdflatex until zero errors and zero undefined references remain. - Symlink-Based Deduplication: Creates symbolic links in the root directory pointing to PDFs already present in subdirectories, avoiding duplicate physical copies and data drift. - Use Case: A paper directory contains 12 legacy PDFs in pdfs/ and a 29-entry references.bib, including a file named Shams2025.pdf that actually corresponds to bibkey Shams2023BRFSS. The Skill verifies content with pdfinfo, renames the file, archives 8 unrelated PDFs, and confirms pdflatex compiles cleanly. ## Quick Start Clean up my paper directory by matching the PDFs in the pdfs subfolder against references.bib, archiving unrelated files, fixing name mismatches, and verifying the paper compiles with no undefined references.