large-scale-text-editing

Guidance for transforming large text files (thousands to millions of rows) using text editors like Vim. This skill should be used when the task involves bulk text transformations, CSV manipulation, column reordering, regex-based find-and-replace operations, or when there are keystroke/efficiency constraints. Applies to tasks requiring macro-based editing, batch substitutions, or complex text processing where understanding the transformation pattern from input/output samples is needed.