What problem does it solve? Combining spreadsheets from different sources is tedious and error-prone when files use different column names, formats, and schemas. This Skill automates the merge process while preserving data lineage and surfacing conflicts instead of silently dropping data. ## Core Features & Use Cases - Intelligent Column Matching: Maps variant column names (e.g., "firstname", "First Name", "fname") onto one unified schema using exact, case-insensitive, then fuzzy matching, with an auditable mapping report. - Deduplication & Conflict Resolution: Deduplicates by primary or compound keys with keep-first, keep-last, keep-longest, or merge strategies, and logs every conflict with its resolution. - Verification & Reporting: Asserts row math and key uniqueness after merging, then produces a structured merge report with completeness stats and export options (CSV, Excel, JSON, SQL, Parquet). - Use Case: You receive three contact exports from different teams with inconsistent headers. Use this Skill to consolidate them into one deduplicated file, review the 47 conflicting records it flags, and export the result as Excel. ## Quick Start Merge the attached contacts_jan.csv, contacts_feb.csv, and leads_export.xlsx into one deduplicated file keyed on email and show me the merge report.
