Worked on the noir-lang/noir repository to enhance the reliability and correctness of the SSA interpreter within the CLI toolchain. Focused on enforcing cross-pass consistency, this developer implemented a bug fix that detects and fails on discrepancies in interpreter outputs across SSA passes, directly addressing silent divergences that previously complicated debugging and continuous integration. By surfacing inconsistencies and improving error handling, the changes increased observability and enabled faster issue resolution for downstream tooling. The work leveraged Rust for robust CLI development and error management, resulting in more predictable and transparent results for users interacting with the Noir command-line interface.