Gemma.Witness - Offline Multimodal Evidence Capture with Gemma 4
Brad Kinnard
This is a submission for the Gemma 4 Challenge: Build with Gemma 4 What I Built Gemma.Witness is an offline-first multimodal evidence capture system built for environments where cloud access, trust, or chain-of-custody assumptions fail. The system records audio alongside supporting images, runs local multimodal analysis through Gemma 4, and produces a signed evidence bundle containing: Structured incident reports Timestamped evidence metadata Local reasoning traces Hash-linked verification artif