https://www.bleepingcomputer.com/news/technology/twitter-open-sources-recommendation-algorithm-code/

Twitter announced on Friday that it's open-sourcing the code behind the recommendation algorithm the platform uses to select the contents of the users' For You timeline.

However, the code made public today doesn't include parts behind advertising recommendations, or that would endanger Twitter's ability to keep threat actors' attempts to manipulate the platform under control.