Edit without recompressing

createZipModifier() edits an archive without touching the entries you keep: save() appends the changes after the original bytes (fast, but replaced data lingers as dead bytes), while saveCompact() rewrites canonically and truly deletes — still without recompressing anything. Pick edits, apply, and compare the two outputs byte for byte.

The demo archive holds a dominant report.csv (~24 KB), a small logo.svg and a readme.txt.