Client on OpenCart: in Merchant Center hundreds of products 'Page unavailable'. Ads running.
Fed Claude Code 600 MB of access logs. Found in minutes: the feed was serving product URLs without the /uk/ prefix → the site redirected them to another language version via a 301 redirect → Google considers 'unavailable'.
Fix — one line in the feed settings, added /uk/. Ran all products as Google bot: 947 out of 947 → 200. A couple of hours from 'I don't understand what's wrong' to 'all green'.
Moral: a year ago, a programmer was needed here — to dig into logs, feed code, database. And it would have taken several hours. Now AI does all this diagnostics, and you just guide it. The entry threshold for such tasks has collapsed. (but you still need to know the basics! for example, I understood where the server is, how to access it, where to look, where to get logs and what to do with them).
