Build Your Own Local AI Coding Agent with Gemma 4 and OpenCode

Towards Data Science provides a step-by-step guide on building a local AI coding agent using Gemma 4 and OpenCode via Ollama. Meanwhile, a developer addressed the issue of AI agents losing session context by implementing a durable external storage system. Instead of relying on system messages or prompts, the solution utilizes plain markdown and YAML files. This approach allows the agent to read and write persistent project data, eliminating the need to re-explain context every session.