During a two-month period, El Kenny contributed to both the rubocop/rubocop and Shopify/rails repositories, focusing on backend development and static analysis using Ruby and Ruby on Rails. In rubocop/rubocop, El Kenny refined the Lint/UselessAssignment rule to eliminate false positives for variable reassignment across conditional branches, improving lint accuracy and reducing CI noise. For Shopify/rails, El Kenny delivered eager autoloading for ActiveRecord::Transaction, enhancing startup performance, and fixed an edge-case bug in DatabaseTasks#for_each to ensure correct behavior across diverse database configurations. The work demonstrated a strong grasp of Ruby internals and a thoughtful approach to maintainability and performance.