Worked on enhancing RISC-V FENCE instruction support across the golang/arch and golang/go repositories, focusing on both disassembler functionality and technical documentation. Improved the disassembler in Go to handle FENCE and FENCE.TSO instructions with plan9 operand compatibility, adding checks for reserved encodings to ensure accurate decoding. Updated documentation in golang/go to clarify the semantics of FENCE instructions, including predecessor and successor sets, aligning guidance with current assembler capabilities. Leveraged skills in Go, assembly language, and backend development to deliver features that reduce ambiguity for developers and streamline support, demonstrating depth in disassembler internals and cross-repository code alignment.