Turn a repetitive CSV export into a repeatable workflow. I will process ONE UTF-8 CSV of up to 10,000 rows and 20 columns, apply up to three agreed simple cleaning rules, and create one summary of counts or totals grouped by one column. You receive the Python source, cleaned CSV, summary CSV, example input/output, run instructions and a runnable validation check. The script uses Python 3.12+ and the standard library on Windows. Please message with a redacted sample and your expected output before ordering so we can agree duplicate handling, invalid-row rules and compatibility. Delivery: five days after complete requirements, with one revision within the agreed scope. Scraping, APIs, Excel macros, OCR, dashboards, accounting advice, currency conversion and multiple input files require a separate scope. The gallery uses fictional data, not previous client work. I use AI-assisted development and check the agreed outputs before delivery.