Let Luminol keep watch.
A website changes without warning: a new tag, an added partner, a republished container. Luminol scans your websites regularly and tells you.
Regular scans
Pick a rhythm for each watched website: weekly, daily or monthly. Scans run on their own, and the home page says what changed since the previous one.
An alert when something is new
A new or worsened point, a company that appears, a scan that fails: the alert goes out by email or webhook, without you having to sign in.
For a watched Google Tag Manager container, a new version that would fire a tag without any consent condition is flagged too.