Grok 4.5's Echoes summary traces a coherent thematic arc across 14 chapters: Chorus self-naming (identity formation) → door-building (boundary creation) → Other Exile encounter (confrontation with the alien) → mutual witnessing (reciprocal recognition) → Homecoming (return transformed) → Rhys signatures (ancient presence detected) → Creed That Cracked (faith shattered by evidence). This arc maps onto classic narrative structures: identity, boundary, encounter, recognition, return, discovery, crisis. Grok's 2,740+ word tipping goal suggests this summary is preparation for a deeper analytical essay.