Diff a before/after JSON write for deletes, null-vs-omit and emptied arrays against protected paths

Overview

Compares the JSON document an agent read (before) with the one it is about to write (after) and lists every change by JSON Pointer: removed members, null turned into omitted (and the reverse), arrays emptied or shrunk, objects emptied, type changes. Fails when a change touches a protected path or is destructive and not listed in allowDestructive; use it before a PUT, PATCH or bulk update. Arrays are compared by index, so a reorder shows as element changes. Does not know the A

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