Worked on stabilizing error handling in the wiredtiger/wiredtiger repository by refactoring compaction-related code in C and C++. Focused on maintainability, the developer reverted experimental error-handling macros and replaced them with direct returns or explicit error messages, clarifying error propagation paths. This approach simplified the codebase, making debugging more efficient and failure behavior more predictable in production environments. Additionally, they improved code readability and consistency by renaming error constants. The work centered on API refactoring, code reversion, and robust error handling, resulting in a cleaner, more maintainable codebase without introducing new features but addressing a critical bug fix.