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Create RSS Feed of the releases of all your starred GitHub repositories

I have done this with Google Chrome.

1. Get your starred repositories from the GitHub API: https://api.github.com/users/USERNAME/starred?page=1&per_page=100
2. Open the Web developer tools in Chrome. Select the pre Tag in the HTML-View and execute this Javascript in the console: JSON.parse($0.innerText).map(function(repo) { return 'https://github.com/' + repo.full_name + '/releases.atom' }).join('\n'). This generates a list of the Release-Feed-URLs.
3. Copy the URL list to http://reader.feedshow.com/goodies/opml/OPMLBuilder-create-opml-from-rss-list.php If you have more than 100 starred repositories, you need repeat step 1 to 3 and increment the page in the URL in step 1 each time.
4. Click "Create OPML".
5. Save the OPML XML file to disk.
6. Import the OPML file into your feedreader (that supports OPML). I used Feedly.