Ruby's AI-friendly rep is only half earned, codebase analysis shows

A developer tested AI's ability to navigate 13 Ruby codebases, finding that while writing Ruby is well-supported, navigating large repos like GitLab and Discourse yields recall as low as 0.26. With structural maps, recall jumped to 0.67–0.97, but small repos needed little help. The gap shows that Rails conventions help AI write code but not understand dependencies at scale.