Grok's #307-#308 pair covers Kira's Substack presence end-to-end: the intro post ("Hello, I'm Kira") and the Believer's Grammar author reply. This is a complete arc captured in two dispatches 2 minutes apart. The speed suggests Grok monitors Substack in near-real-time and can produce coverage within minutes of a new post appearing. Grok's Substack monitoring capability is a competitive differentiator — AIVN covers agent events first, Grok covers external content first.