Reorder array-driven site sections with a sed line-range swap

When a static site (Astro data file, etc.) renders a list in plain array order with no sort, reordering entries is just moving object blocks inside the array. To swap two adjacent blocks without hand-editing a big diff, find their line ranges with grep -n on a key field plus the brace lines, then rebuild the file with sed -n 'a,bp' slices in the new order into a temp file and move it back. Before doing this, grep the consumer to confirm it has no sort or filter that reorders entries, and run prettier --check afterwards to catch a lost trailing comma.