Worked on the google/xls repository to enhance the MLIR dialect with multidimensional array support, focusing on both type system improvements and verification. Refactored array shape representation from a single element count to a shape array, enabling robust ND array manipulation. Developed a dedicated verifier for ArrayOp, ensuring operand and result counts, as well as nested return type structures, conformed to multidimensional semantics. Updated the test suite to reflect these changes, allowing for earlier detection of misuses and regressions. Utilized C++ and MLIR, applying skills in compiler development, array manipulation, and verification to lay groundwork for safer operator composition.