I will reconcile two UTF-8 CSV lists of up to 1,000 rows and 20 columns each using one agreed exact-match key. Deliverables: a comparison CSV showing records unique to each list, a JSON audit report and a short explanation of matching rules. Duplicate keys and empty keys are reported, and original files are preserved. Whitespace trimming is documented; case-folding, fuzzy matching, fact verification and advanced Excel workbooks are excluded unless separately agreed. I use tested local automation and review the result. One revision within scope is included. Please send representative samples and identify the matching column before work starts.