crawl fetches recent items from multiple sources and prints them to the stdout. It can be used, for example, with Apple Shortcuts to deliver a newsletter periodically.
go run . \
-atom 'Go Blog=https://go.dev/blog/feed.atom' \
-gnews 'Associated Press=apnews.com' \
-reddit 'Reddit Chess=chess' \
-rss 'Hacker News=https://news.ycombinator.com/rss'