---

name: csv-deduper

description: Remove duplicate rows from CSV files by key columns. Use when asked to deduplicate CSVs or keep unique records.

Overview

Deduplicate CSV rows using one or more key columns. Keeps the first row by default.

Inputs

• A CSV file.
• Optional key columns (comma separated).

Outputs

• A new CSV file with duplicates removed.

Workflow

1. Choose the key columns (or use the whole row).
2. Run the script to produce a deduped CSV.
3. Validate row counts.

Usage

python scripts/csv_dedupe.py --input data.csv --output data.deduped.csv --keys id,email
python scripts/csv_dedupe.py --input data.csv --output data.deduped.csv

Safety

• No network access.
• Only reads/writes the file paths you pass in.