Worked on the luau-lang/luau repository to enhance the Luau type system by implementing solver improvements and addressing key bugs. Focused on compiler development and static analysis, the work introduced a feature that pre-populates class definitions, preventing use-before-declaration issues in declaration files and supporting complex project structures. Additionally, fixed the population of definition locations and module names for table types, ensuring the new solver aligns with previous behavior and improves type information accuracy. Utilized C++ and the Luau language to deliver these updates, contributing to more reliable type checking and better tooling support for developers working with Luau projects.