Wikipedia:Articles for deletion/Yesod (web framework)
The O'Reilly book and the chapter in https://books.google.co.uk/books?isbn=1937785637 Seven Web Frameworks in Seven Weeks: Adventures in Better Web Apps, which compares and contrasts web frameworks, and the other sources mentioned above are enough to show that the topic has in depth reliable sourcing. The article itself is meticulously cited to mostly primary sources and could use some secondary sourcing and cleanup of excessive detail. But I don't see any problems that could not be fixed with ordinary editing. A notable topic and an article with  problems suggests a keep. --&#123;&#123;u&#124
— User:Mark, 22:25, 27 September 2018 (UTC)
Stance: keep
Cited policy: WP:SURMOUNTABLE (Wikipedia:Arguments to avoid in deletion discussions)