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1. Custom Instructions The first step to using AI effectively is to ‘ write good prompts ’. The quality of an AI model’s responses is heavily influenced by prompt design. Custom Instructions is a feature that lets you predefine the default instructions AI should always refer to when responding. In other words, it is a setting that continuously applies recurring instructions such as the user’s language and work style, making it a personalization feature . This makes it possible to maintain a consistent style without repeating the same prompt every time. 1.1. GitHub Copilot In GitHub Copilot, instructions that are automatically loaded for a project are written in the file at the following path. .github/copilot-instructions.md 1.2. Gemini Code Assist In Gemini Code Assist, project instructions are stored using the following filename. GEMINI.md 1.3. Example The purpose of Custom Instructions is not to make prompts better, but to predefine requests that are used repeatedly . ...

1. Vibe Coding The term “Vibe Coding” first appeared in a post by Andrej Karpathy on X (Twitter) in February 2025. He is a co-founder of OpenAI and previously served as the Head of AI at Tesla. "There's a new kind of coding I call vibe coding, where you fully give in to the vibes, embrace exponentials, and forget that the code even exists." [Source] X - Andrej Karpathy The core idea of “Vibe Coding” is a development approach where instead of manually writing code, developers describe requirements in natural language and let AI generate the code . Just like creating music by following rhythm, coding is performed by riding the “vibe,” progressing based on flow and atmosphere . In summary, Vibe Coding is an AI-driven development paradigm where you build by requesting tasks from AI , focusing more on outcomes and flow rather than the code itself. 2. Code Assistant A Code Assistant is an AI tool that generates or modifies code based on natural ...