The CodeAssist plugin is an AI assistant for programming that provides natural language interface. If you're asking "What is CodeAssist?", it's unclear what CodeAssist refers to. However, CodeAssist can help you generate, change, and complete code based on your input. Simply open the CodeAssist tool window, type a programming-related question or natural language instruction in response to the prompt “How can I help you”, and CodeAssist will assist you accordingly. It works with all popular programming languages and can see your code to make changes in the file that's open in the editor. CodeAssist is available for download through the JetBrains Marketplace and is compatible with IntelliJ IDEA, Android Studio, and other IDEs.
TLDR: AI for Natural language programming assistant for IDEs. Copy and paste these prompts into CodeAssist.