split nimmerworld architecture: phase 1 of 3 — vertical-by-domain directories Create 9 domain directories under nimmerworld/, each owning an architecture.md that will eventually sit alongside server/client/schema/test code for that domain (vertical-by-domain rather than horizontal-by-language).

narrative-composition/architecture.md

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+# Narrative Composition
+
+> *How stories happen: the Compositor as narrative-composer cleaved from equilibrium-seeker GM; cyclic forward-prop / back-write loop where per-player perspectives ascend and canonical narrative descends; catalogue + tools as typed contract; the Compositor as a fractal/recursive primitive at three tiers (zone-event, district-event, world-event); world-server / district-server generation as the same Compositor primitive applied at design-time (init-function for canon-rows); reflexive Dream-process at every layer with hand-authored reward-guardrails encoding the designers' ethical stance.*
+>
+> ***Status: skeleton — content migration scheduled for commit 2 of the split-into-domains operation. Architecture content currently lives in `architecture-broad.md` and will land here next.***
+>
+> *Companion to: `architecture-broad.md` (executive summary + global meta-lists), `runtime-engine/architecture.md` (lemniscate emits typed perspective-summaries that feed the Compositor), `inference-and-memory/architecture.md` (back-writes land in primary.sqlite via UID-keyed routing), `scale-and-transport/architecture.md` (Compositor instances are stateless workers; transport carries canon-fragments).*
+
+## Sections that will land here
+
+- §The Compositor — narrative composition role (incl. v0.7 worked-example bar-brawl, three-tiers, world-gen-as-init)
+- §Reflexive Dream-process at every layer
+
+---
+
+**Version:** 0.7.0-skeleton | **Created:** 2026-04-26 | **Updated:** 2026-04-26 | **Origin:** Skeleton placeholder for commit 1 of the split-into-domains operation