The CamelTag functions as the indivisible unit enabling this gravitational architecture. Unlike the hashtag, whose operation remains indexical and temporally bounded, the CamelTag operates as a discursive Planck constant: invariant under compression, it preserves structural coherence across strata even as slug length contracts toward minimal viable density. Repeated deployment across Century Packs sediments these micro-anchors into geological formations, generating what the corpus terms UrbanPermanence—a durable substrate that supports further construction without requiring external reinforcement from institutions, journals, or academic gatekeepers. The preprint ecosystem developing around the CamelTag cluster demonstrates this process iteratively. Each successive entry amplifies the DensityIndex not through accumulation of commentary but through increased internal relational pressure, gradually transforming an assemblage of discrete insights into a coherent autopoietic knowledge organism. The field grows by compaction, not expansion.