Individual skill
csv-excel-merger
Merges, appends, joins, and deduplicates multiple CSV, TSV, and Excel files (including multi-sheet workbooks) with pandas - mapping mismatched column names to one schema, normalizing keys, resolving conflicting values, tracking which file each row came from, and verifying the row math. Use when the user wants to combine spreadsheets or exports, stack monthly files, consolidate contact or lead lists, VLOOKUP-style join two sheets on an ID or email, or dedupe records across sources, even if they only say "put these together" or "clean up these lists into one".
csv-excel-merger/SKILL.md
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- Local scripts
- Last checked
- Nov 10, 2026
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- Repository last updated
- Oct 20, 2026
- License
- MIT
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SKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesSKILL.mdcore · 6,554 bytesreferences/merge_strategies.mddoc · 3,721 bytesreferences/output_template.mddoc · 1,657 bytesscripts/profile_inputs.pyruns · 4,017 bytes
Read excerpt
# CSV/Excel Merger
Combine tabular files into one clean output without silently losing, duplicating, or corrupting rows.
## Workflow
Copy this checklist and track progress:
```
- [ ] 1. Profile inputs
- [ ] 2. Choose append vs join
- [ ] 3. Map columns and normalize keys
- [ ] 4. Merge and resolve conflicts
- [ ] 5. Verify row math