Worked on enhancing encoding-related error handling in the Prism parser within the ruby/ruby and ruby/prism repositories. Developed and expanded targeted tests in Ruby to validate the parser’s behavior when encountering regexp encoding option mismatches and UTF-8 handling with encoding modifiers. This approach improved the reliability and clarity of error reporting for end-users, reducing ambiguity in encoding scenarios. Focused on robust error handling and comprehensive testing, the work ensured that the parser correctly identifies and reports encoding mismatches. The contributions strengthened the overall parsing behavior, leveraging skills in Ruby, error handling, and automated testing to address nuanced encoding issues.