This blog post shares the project I worked on during my summer internship at the Bennett Institute as part of the HDR UK Health Data Science programme. My project explored how ehrQL, is being used across OpenSAFELY repositories. I analysed 301 codefiles from 65 Repositories under the OpenSafely org. and was able to identified which features researchers rely on most, which are less common, and where improvements or additional support could be valuable.