Fix messy CSV and Excel data -- duplicates, inconsistent formatting, mismatched date formats, stray whitespace -- before you analyze or import it, no formulas or code required.
Data & Analysis is 15 skills deep today and only one (DuckDB Analytics) is free -- every other tool in the category assumes the user already writes SQL, Python (Pandas Data Expert), or spreadsheet formulas (Excel Wizard is in Document Skills, not here). This skill is the step before any of that: given a messy export -- duplicate rows, "NY" vs "New York" vs "ny", dates in three different formats, trailing whitespace that breaks a VLOOKUP -- it produces a cleaned, consistent version and a plain-language list of what it changed and why. Distinct from CSV Data Summarizer (summarizes data that's already clean) and Statistical Analyzer (runs statistics on it): this is data hygiene, not analysis. Added as the category's free entry point for the large share of Data & Analysis visitors who aren't coders.
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