What I shipped during I/O 2026 week: Gemma 4 on Ollama with a five-piece safety stack

During Google I/O 2026 week, the author successfully deployed Gemma 4 on Ollama, leveraging a "five-piece safety stack" to address common challenges encountered with 2B-parameter models. This setup enabled the operation of a research agent loop by mitigating issues like incorrect JSON formatting and tool argument hallucinations.