Rewrite wording inside a WhatsApp Flow draft, and nothing else. Each patch is a JSON pointer (from get_whatsapp_flow: the component's path plus "/" plus the property, e.g. /screens/0/layout/children/1/label) and the replacement string; at most 20 per call, applied all or nothing. Two things are refused outright, so do not attempt them: a pointer that does not land on a text property (a screen id, an action name, a component type, a payload key) is refused with the path named, and a flow that is not a draft cannot be patched at all — a published flow has to be superseded by a new draft. A value that holds a ${...} reference is a binding, not wording, and is left alone. Always pass the lock_version get_whatsapp_flow returned for this flow: it is what proves the patch was written against the document as it stands, and a patch without one cannot be applied.