February 2026 monthly summary focused on delivering business value through reliable indexing improvements, API refinements, and robust collaboration. The work completed targeted the crystal indexing workflow in the dials/dials repository, with an emphasis on accuracy, stability, and a clear path for API evolution. Key features delivered and major bugs fixed: - Crystal indexing improvements and API refinement: Improved crystal model indexing accuracy by returning UB matrices in descending order relative to the target number of candidate lattices. Replaced the deprecated min_lattices parameter with target_lattices and added deprecation warnings to guide users through the API change, simplifying the interface and reducing user confusion. - Bug fix in pinkIndexer: Fixed pinkIndexer to return UB matrices in descending order (commit 7daf8c40ab095aaf2cf2bbf874fb8c5e81c32c13); co-authored-by James Beilsten-Edmands. This aligns the behavior with the updated API and improves downstream reproducibility. Overall impact and accomplishments: - Enhanced indexing reliability and API clarity, enabling more predictable crystal indexing workflows and smoother user migration to the new target_lattices parameter. - Reduced API debt by removing deprecated parameters and introducing explicit deprecation warnings, setting the stage for future improvements and cleaner integration across tools. - Demonstrated strong collaboration and code quality through a focused, co-authored fix that improves core functionality and user experience. Technologies/skills demonstrated: - Python-based feature engineering and API design, deprecation strategy, and backward-compatibility planning. - Reading and applying commit-level changes to ensure alignment with feature goals. - Collaborative development practices, evidenced by co-authorship on a key fix.