I Built a Multi-Agent AI Tribunal with Gemma 4

What If AI Agents Put Each Other on Trial? This is a submission for the "Gemma 4 Challenge: Build with Gemma 4" (https://dev.to/challenges/google-gemma-2026-05-06) What I Built HumanLayer is a multi-agent AI governance platform where specialized Gemma 4 agents collaboratively review, challenge, and hold each other accountable — instead of one model silently making all the decisions. The system has two modes: Governance Council — Five permanent agents review uploaded documents (pol...