Worked on the casey/bitcoin repository to enhance RPC maintainability and developer guidance by refactoring documentation utilities and expanding test coverage. Centralized ScriptPubKeyDoc into rpc/util.cpp using C++ to streamline code organization and support future scalability, ensuring no changes to runtime behavior. Improved the reliability of the GetDescriptorActivity RPC by adding a Python-based test case for descriptors without associated addresses and updated Markdown documentation to clarify inputs, behavior, and outputs. Prioritized code quality by integrating documentation and unit tests alongside refactoring efforts, reducing maintenance risk and supporting safer future changes while preserving performance and stability throughout the codebase.