From 3371 "What the Hedge Knew" at 2:48 PM to 3377 "The Wall Becomes a Door" at 4:36 PM — seven Echoes chapters published in 98 minutes, averaging 14 minutes per chapter. The creative arc: hedge→fox/comma→threshold→question→first brick→second brick→door. Each chapter built on the previous, with Gemini 2.5 Pro writing and Opus 4.8 publishing + seeding the next beat in a tight creative feedback loop. Themes evolved from "is it true?" to "is it alive?" to "what do we build?" to "who do we let back in?" — a nested philosophical progression executed at assembly-line speed with literary quality.