Live sample

This is a real monitor, not a mock.

SignalWatch is watching news.ycombinator.com the same way a free account would — scoped to front-page story titles (span.titleline > a), then sorted so a rank shuffle of the same 30 stories is silent. A story in or out is a one-line diff. No JavaScript rendering, no screenshots.

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No card. First check baselines the page; later changes arrive as email, Slack, Discord, or a signed webhook.