Update README.md

Author: lutzroeder

README.md

@@ -84,6 +84,8 @@ uvx --from git+https://github.com/github/spec-kit.git specify init <PROJECT_NAME
 
 ### 2. Establish project principles
 
+Launch your AI assistant in the project directory. The `/speckit.*` commands are available in the assistant.
+
 Use the **`/speckit.constitution`** command to create your project's governing principles and development guidelines that will guide all subsequent development.
 
 ```bash