Introduction In my previous post, we explored how Gemini Code Assist’s Agent Mode can handle multi-file refactors. However, an agent is only as good as the instructions it follows. Without guidance, AI might generate code that works but violates your team’s architectural standards. To solve this, Gemini supports a special file: GEMINI.md. Think of this as the “System Prompt” for your entire repository. What is GEMINI.md? The GEMINI.md file is a Markdown document placed in your project’s root.