概要
This skill provides expert guidance for handling multi-million line text files like CSVs or log data where traditional manual editing is impossible. It outlines a comprehensive four-phase approach—Understand, Design, Test, and Execute—ensuring data integrity through strategic sampling and rigorous verification. By leveraging advanced tools like Vim macros, sed, and awk, it enables complex batch processing and repetitive transformations while strictly adhering to performance and operation count constraints.