Worked on core enhancements and documentation improvements across the elixir-lang/elixir and phoenixframework/phoenix repositories. Delivered an update to Elixir’s NaiveDateTime.from_erl and Time.from_erl functions, refining Erlang time tuple parsing to accurately handle microseconds and updating function signatures for better validation. In Phoenix, focused on controller documentation, correcting render chaining usage and providing explicit XML rendering guidance to streamline developer onboarding and reduce misconfigurations. Applied skills in Elixir, API design, and technical writing to clarify workflows and improve usability. The work emphasized precise specification updates and actionable documentation, contributing to more robust time handling and clearer XML rendering practices.