Merge pull request #2 from DUBSOpenHub/copilot/update-readme-clariification

[WIP] Update README to clarify /skills add command usage

Author: DUBSOpenHub

README.md

@@ -32,12 +32,15 @@ Designed for **absolute beginners**. Even if you've never touched a terminal, we
 
 ### Add the Skill
 
-Inside a Copilot CLI session, run:
+1. Open a Copilot CLI session (run `copilot` in your terminal)
+2. At the `>` prompt, **type** the following slash command (do not paste it into a conversation):
 
 ```
 /skills add DUBSOpenHub/copilot-cli-quickstart
 ```
 
+> **Note:** `/skills add` is a built-in CLI command — it must be entered directly at the prompt, not sent as a chat message.
+
 That's it! One command. You're ready. 🎉
 
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