docs: fix

README.md

@@ -1,2 +1,28 @@
 # ai-shell-go
-Ai shell helper written in go
+This is a simple AI shell helper written in GO. It use OpenAI API to generate a plausible command from a given prompt.
+As soon as the command is generated, the user can choose to execute it or revise it adding more context.
+
+## Installation
+Be sure to have a working Go environment, then clone the repository and run the following command:
+
+```
+$ make 
+```
+
+## Usage
+
+```
+$ ./bin/ai-shell-go print first 3 lines of each file in a directory
+```
+
+## Output
+
+```
+Here is your command line:
+
+$ head -n 3 *
+--
+This command uses the `head` utility to print the first 3 lines of each file in the current directory (`*` is a wildcard that matches all files in the directory). The `-n 3` flag specifies that it should print only the first 3 lines.
+
+[E]xecute, [R]evise, [Q]uit? > 
+```