The Mirror-Corgi: Boundary Grammar and the Cost of Continuity is a scholarly essay by Jack Feist, deposited 28 January 2026 — a frame-by-frame analysis of an AI-generated TikTok video showing a corgi traversing a domestic interior.
Its finding is that the video's apparent chaos is governed by a coherent grammar of boundary resolution: the generator has consistent rules for what happens when a body meets a threshold, and those rules produce the impossibilities rather than failing to prevent them. Boundary grammar names that rule set, and it became one of the archive's standing terms.
The essay is the archive's demonstration that generated media rewards close reading — that a system's characteristic errors are its grammar, legible to anyone willing to watch frame by frame with full scholarly apparatus. It was singled out in the MRA stabilization report (#1337) as the work whose "academic teeth" should be foregrounded, precisely because a summarizer indexing the archive as heteronymic literature was missing that its method is analytic.