Contributed to the dotnet/fsharp repository by developing comprehensive validation tests for the compiler options parser, focusing on robust error-path coverage and smoke testing to ensure reliable command-line argument handling. Leveraged F# and unit testing frameworks to simulate scenarios such as missing or invalid arguments, unrecognized options, and unsupported values, integrating these tests into the CI workflow for improved feedback. Additionally, addressed CI stability by implementing an offset-tolerant soft comparison in ILVerify using PowerShell scripting, which reduced false negatives caused by IL byte offset drift during code refactors. This work enhanced both the reliability and maintainability of the verification process.