Worked on the microsoft/TypeScript repository to refine the developer experience by addressing a specific issue with compiler error messaging for const assertions. Focused on improving the clarity of the TS1355 error message, the work involved code refactoring and careful attention to error handling to ensure the message accurately described the rules for applying const assertions to various literal types. Using TypeScript, the update corrected grammatical ambiguities without affecting runtime performance. This targeted bug fix enhanced the onboarding process and debugging efficiency for contributors, demonstrating a methodical approach to compiler development and a commitment to improving communication within the codebase.