Describing what to track in plain language is the part I would test hardest. We aggregate job postings from dozens of boards, and the real problem was never volume: the same vacancy shows up on four sites with slightly different titles, and a filter that treats each copy as its own signal buries the one new thing under repeats. Grouping duplicates mattered more to us than filtering. When the same announcement lands on X, Reddit and a couple of RSS feeds, does Zooi merge it into one item with the sources attached, or does each platform get its own card?