The user should provide a number N as an argument. If they didn't, ask them for it.
Run this command (replacing $N with the user's value):
jq -n --argjson existing "$(cat .reviewer/settings.local.json 2>/dev/null || echo '{}')" --argjson n $N '$existing * {"stop_hook": {"max_consecutive_blocks": $n}}' > .reviewer/settings.local.json.tmp && mv .reviewer/settings.local.json.tmp .reviewer/settings.local.json
Then confirm that the stop hook max consecutive blocks has been set to the requested value.