During March 2026, Firas enhanced the robustness of JSON handling in the Ruby ecosystem by addressing edge-case failures related to negative depth values. Working across the ruby/ruby and ruby/json repositories, Firas implemented validation logic in both C and Ruby to reject negative depth inputs during JSON generation, preventing potential crashes and hangs. He reinforced these changes with targeted unit tests to ensure that invalid inputs consistently raise ArgumentError exceptions. By establishing cross-repository consistency for depth validation, Firas improved the stability and maintainability of JSON processing, demonstrating careful attention to defensive programming and reliability in production environments.