SponsorProof: Local AI Tool Flags Sponsorship Compliance Errors Before Submission

SponsorProof is an open-source auditing tool that compares a brand's campaign brief against a creator's draft script, transcript, or caption to catch compliance problems. It verifies exact requirements such as discount codes, hashtags, and sponsor URLs using deterministic rule-based code, while semantic items like talking points and tone are assessed by Google's Gemma 3 model running locally through Ollama. Each finding is tied to verbatim excerpts from the brief and draft, and findings the AI marks compliant but cannot be supported by evidence are downgraded to NEEDS_REVIEW. The tool also estimates spoken duration, suggests copy-ready corrections, and exports reports as Markdown or JSON. It is built with Next.js, React, TypeScript, and Tailwind CSS, and was developed as a submission to the Hacktoberfest Open-Source AI Challenge.