Particularly there is no process mentioned about how to create a add-on,however a simple process is given to send a notification that's it......what I want to know is how to create a add-on and then put it in the market place and from there my friend could install the add-on and work as needed.....please share the detailed information.
Here are some tutorials for building add-ons with Hipchat:
If you want to put it in the marketplace, then it will probably have to be a full add-on (https://developer.atlassian.com/hipchat/tutorials/getting-started-with-atlassian-connect-express-node-js).
You should be able to use the second link to be able to create a sample add-on by following the steps. Unfortunately, that's about as easy as it gets. If you don't understand what's written there, then it will be difficult to write your own Hipchat add-on.
Alternatively, you could look on bitbucket/github for some project that is similar to what you are trying to achieve and copy from there.
Please note that I have not made a Hipchat add-on myself, so I cannot give you much guidance beyond that.
...have mention name FirstnameLastname. Fe.: @MaartenCautreels This certainly helps to know who is being mentioned in a conversation. Imagine your colleague sends the following message...
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