Shared SentryDock monitor setup

monitor updates to Grain's purchase of 800mhz spectrum from Tmobile

This public SentryDock page shows a reusable monitoring setup, configured sources, latest surfaced results, and a copy action for creating the same AI-powered news monitor in another workspace.

Sources monitored: https://tecknexus.com/, https://thefastmode.com/, https://onetouchintelligence.com/, https://isemag.com/, https://broadbandbreakfast.com/, https://x.com/GrainManagement.