This is a comprehensive Power BI reference that covers the full stack: DAX measures, M language for Power Query, star schema modeling, and time intelligence patterns. You get concrete examples for everything from basic CALCULATE filters to iterator functions like SUMX and RANKX, plus proper date table setup and relationship management. The DAX section is especially thorough with variables, context switching, and year-over-year calculations you'll actually use. If you're building dashboards or data models in Power BI and need to look up syntax or see how to structure measures correctly, this gives you working patterns instead of documentation links. It assumes you know what you're trying to do and just need the right DAX formula or modeling approach.
npx skills add https://github.com/personamanagmentlayer/pcl --skill powerbi-expert