Ask HN: Would a service like this make sense?

I personally haven't come across a need for that, but I imagine it could be useful to someone.

Clickable: http://see-reaction.appspot.com/index.html

One particular use case for me is: I usually push article to +Pocket or readability, and then I like to check it comments on HN.

I've always wanted a browser plugin like this that will flag if the website I'm currently on has comments on hn/reddit etc.

Check this out: https://chrome.google.com/webstore/detail/hhedbplnihmkekhgma...

Looks good, although not sure the reactions from Reddit and HackNews are the widest perspective.

What is the stack?

Reddit and HN are just a start, will keep on adding more services.

And what do you mean by stack?

Presently its all client side. Working on APIs.

Why is it trying to submit to Reddit?

Why do I have to enter a title, why not just a url?

It tries to submit to HN/Reddit in case the link isn't already present there. And requirement of title is from respective sites. It opens submit page in an iframe.