Agent Skills: ds

ALWAYS use for ANY substantive empirical task whose output is a dataset, table, figure or number - "analyze this data", "build the panel", "merge these datasets", "run the regression", "profile this dataset", "clean this file up for analysis", "how many firms are in here", "make me a summary table", "pull the data and check X", "replicate this paper's table 2", "build the ETL pipeline", "/ds". Use proactively even when the user asks casually and never says "analysis" - do not start writing pandas or SQL first.