May 2025 monthly summary for landlab/landlab focusing on reliability and input validation improvements in NetworkSedimentTransporter. Key achievements delivered improved error handling and input validation, directly enhancing robustness and maintainability. Key accomplishments: - Type-safe input validation for NetworkSedimentTransporter implemented, replacing ValueError with TypeError for invalid input types (grid, parcels, flow_director) to provide more precise errors and reduce downstream failures. - Code changes consolidated under a single commit, ensuring traceability and easier code review (commit: 3862947617cf235026106e7d5de0574515f46870). - Strengthened typing and input validation patterns to support future robustness initiatives across the input pipeline. Business value: - Increased reliability of the NetworkSedimentTransporter, improved developer and user feedback during misconfiguration, and reduced debugging effort due to clearer error messages. Technologies/skills demonstrated: - Python error handling and type safety (TypeError vs ValueError) - Commit-based development and traceability - Focus on robustness and maintainability in a scientific computing repository