Worked on improving the Ecto Query API documentation in the elixir-ecto/ecto repository, focusing on enhancing clarity and accuracy for developers using Elixir. Addressed a documentation bug by correcting an example for the identifier function, removing references to the deprecated literal function, and clarifying how to interpolate values into query fragments. These updates aligned the documentation with current API practices, reducing onboarding time and support inquiries. The work emphasized API design and documentation skills, ensuring that technical explanations matched the actual behavior of the codebase. All changes were implemented in Elixir, with careful attention to detail and developer experience.