During June 2025, Gigi Tsu focused on improving the correctness and reliability of analytic queries in the elixir-ecto/ecto repository. She addressed a complex bug involving macro expansion within the over/2 order_by clause by implementing a targeted fix and introducing a get_env helper to accurately extract environments from nested tuples. Her work leveraged deep Elixir macro programming and database query optimization skills, ensuring that macro expansion scenarios were thoroughly tested with expanded automated coverage. By prioritizing test-driven development and robust handling of Elixir’s AST, Gigi enhanced the stability of Ecto’s analytic queries, delivering a well-scoped and technically sound solution.