January 2026 monthly summary for madeline-underwood/arm-learning-paths. Focus this month was improving user guidance for performance simulation with MCA on Neoverse cores and reducing ambiguity around the -mcpu flag. Delivered an updated Documentation: Clarify -mcpu flag usage in MCA, including a note for users of older llvm-mca versions regarding the command syntax for help. This enhancement directly improves benchmarking accuracy, onboarding speed, and user experience. No major bugs fixed this period. Overall impact includes reduced support overhead and faster performance tuning across Neoverse configurations. Key technologies/skills demonstrated include documentation best practices, performance benchmarking workflows, Neoverse architecture awareness, and llvm-mca usage.