During April 2025, Flink developed core system verification specifications for the discourse/discourse-rewind and discourse/horizon repositories. Focusing on Ruby and Ruby on Rails, Flink implemented system testing using RSpec to establish a shared, automated approach for verifying essential application features. By introducing reusable system specs and shared behaviors, Flink enabled consistent regression checks across multiple plugins, reducing manual QA effort and release risk. The work laid the foundation for automated regression suites and improved developer-facing test artifacts. This approach demonstrated depth in test-driven development and cross-repository collaboration, ensuring that fundamental functionalities are reliably validated across the Discourse codebase.