April 2025 monthly summary for DUNE/ndlar_flow focused on feature delivery and pipeline enhancements. Delivered a Muon Selection Workflow for MC and real data by introducing shell scripts and YAML configuration to drive muon selection, and added a new selection stage to the h5flow processing pipeline for rock muon identification. This work improves reproducibility, reduces manual setup, and streamlines end-to-end muon analyses across simulated and real datasets. No major bug fixes were logged for this repository this month. Overall impact includes accelerates data processing for muon studies, better configuration management, and alignment with the project roadmap. Technologies demonstrated include shell scripting, YAML configuration, h5flow pipeline integration, and git-based version control.