Add basic framework to README.md

README.md

@@ -1,3 +1,31 @@
 # DevChat
 
-The way developers chat with AI.
+The DevChat core library and CLI.
+
+:point_right: Better check out our [Visual Studio Code extension](https://github.com/covespace/devchat-vscode) on [Visual Studio Marketplace](https://marketplace.visualstudio.com/items?itemName=merico.devchat)! Install and instantly enjoy the UI :clap:
+
+***
+
+## What is DevChat?
+
+The way developers chat and work with AI.
+
+:speech_balloon: Write prompts, _not_ code.
+
+## Why DevChat?
+
+- To let AI write code, DevChat helps you bring **the right context** to AI.
+
+- To apply AI-generated code, DevChat facilitate your **actions to take**.
+
+- To drive AI to work, define **your own workflows and experiences** with DevChat.
+
+## What is Prompt-Centric Software Development (PSSD)?
+
+- Write prompts to create code. Turn prompts to everything.
+
+- DevPromptOps
+
+***
+
+## Community