Solo Developer Finishes PaperTrail at Hacktoberfest Hack Day After Teammates Drop Out

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At Rishihood University's Hacktoberfest Hack Day, a three-person team set out to build PaperTrail, an AI tool that links research paper claims to their code implementations. The app takes a paper PDF and a GitHub repository, then labels each claim as Supported, Ambiguous, or Missing, with code references. The team ran Gemma 4 locally through Ollama and validated file paths, line numbers, and snippets to keep the evidence grounded. As the project grew bigger than expected, two teammates lost motivation, leaving the author to continue alone through the frontend, PDF extraction, and repository analysis.

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