Henry Parker developed the X-ray mode for inlay hints in the scalameta/metals repository, enhancing the developer experience by displaying intermediate types within multi-line and chained expressions. He implemented configuration-driven feature toggles and refined the inlay hints logic to group and render type annotations more effectively, improving code readability and comprehension. His work involved tuning compiler parameters and updating UI instrumentation to ensure stable rendering without regressions. Using Scala and Java, Henry focused on code analysis and IDE development, delivering a feature that reduces cognitive load and accelerates debugging for complex codebases. The implementation demonstrated thoughtful depth and technical precision.