During June 2025, Felix improved the Ecto Query API documentation in the elixir-ecto/ecto repository, focusing on clarifying how identifiers and constants are interpolated into query fragments. By correcting an example to remove an unused variable and eliminating references to deprecated functions, Felix ensured the documentation accurately reflected current API practices. This work, leveraging Elixir and skills in API design and technical documentation, aimed to reduce onboarding time for new developers and decrease support overhead. The changes did not introduce new features but addressed a documentation bug, demonstrating attention to detail and a commitment to maintaining clear, up-to-date developer resources.