v0.27: cross-reference cleanup of event-zones.md across domain papers

Closes the v0.26 interaction-substrate paper-pass cycle initiated 2026-04-27
via the plan-as-baton mechanism (EVENT_ZONES_FOLLOWUP_PLAN.md authored at
end-of-context-density, mechanical execution next-session, scaffold deleted
on completion per the v0.24.5 pattern).

Substantive (political-register/world-generation.md → v0.2):

- §Editor-mode pre-flagging (extends L4 Cell ruleset, v0.27): editor_eligible
  bool field per cell, pre-flagged at world-gen-init; designer-tunable defaults
  per district-tier (deva-pinnacle 0% → underground/wilds 90%); per-cell
  carve-cost gradient scales by cell-position-imperialness. Choice (a)
  designer-flag-at-world-gen committed over choice (b) emergent-from-imperial-
  scrutiny per the 2026-04-27 dialog: clean LOD signal + political-readability
  via material-vocabulary + zero runtime audit-overseer-presence checks.

- §Three-source schema unification (v0.27): cell_table accepts canon-rows
  from world_gen_init / runtime_event / player_authored origins via shared
  schema. The architecture's world-gen-as-init-function key-move now extends
  to player-edit-time as a first-class peer of generator-output and runtime-
  emission. Cell-checksum-divergence audit-vector gains a third source
  (player_authored_divergence) consumed by the same Memorialist counter-
  archive and GM heresy-detection mechanisms.

Mechanical cross-references (single-paragraph propagations of v0.26 design-
decisions through the architecture's describe-by-cross-reference discipline):

- runtime-engine/architecture.md: event-zones.md added to Companion-to header
- style/consent-discipline.md: §Variants 1-4 as event-class taxonomy — the
  four hardstop-pattern variants correspond one-to-one to the event-class
  taxonomy in event-zones.md; the register-test five-question procedure is
  also the event-class-classifier (consent-validation = event-instantiation)
- style/trait-palette.md: 8 traits compose onto the cosmology's outer ring —
  vertically-symmetric on Deva (Sophrosyne+Dikaiosyne) and Naraka (Eros+Philotes),
  side-castes carrying single traits, all four oppositional pairs preserved
  at 180°. Composed wheel renders as iconography AND UI substrate
- narrative-composition/architecture.md: Three-source schema unification
  extends world-gen-as-init-function to player-edit-time
- inference-and-memory/architecture.md: Compositor reads 2D gesture-history
  (caste-target × trait-temperature); coherence-of-political-positioning
  becomes a cornerstone-memory salience axis
- identity-and-personhood/architecture.md + bodies.md: install / clasp /
  post-rogue-NPC-modding mini-games all run on the composed wheel; consent-
  discipline Variants 1-4 determine participant-count and hardstop-pattern;
  the wheel renders the resolution

Verification: 11 papers now reference event-zones.md (vs 4 pre-v0.27,
including the bonus pre-existing imperial-narrative.md cross-ref). The
describe-by-cross-reference, not by re-quotation discipline reaches steady-
state across the corpus. Cross-references resolve cleanly to existing
sections in event-zones.md (verified §Variants 1-4, §The wheel, §Player
editor-mode, §Hardstops, §The composition).

EVENT_ZONES_FOLLOWUP_PLAN.md deleted per plan-as-baton convention.

narrative-composition/architecture.md

@@ -184,6 +184,8 @@ The cyclic forward-prop / back-write loop is the runtime canon-production mechan
 
 **Re-generation semantics.** If world-gen ever needs to re-run (e.g., new world-version with retroactive lore-changes), gen-emitted canon-rows are tagged with `world_gen_version_id`; gen-rows from old version coexist with gen-rows from new version, and runtime-rows are tagged with which version they were emitted under. Coexistence is the default; selective overwriting is an explicit migration operation.
 
+**Three-source schema unification (v0.27).** The world-gen-as-init-function pattern extends to a third writer-tier: player-edit-time. Per [`../political-register/world-generation.md`](../political-register/world-generation.md) §Three-source schema unification + [`../runtime-engine/event-zones.md`](../runtime-engine/event-zones.md) §Player editor-mode + three-source schema unification, the cell_table accepts canon-rows from `world_gen_init` / `runtime_event` / `player_authored` writers, all using the same schema. Same primitive at design-time, runtime, AND player-edit-time. The Compositor's perception-up + canon-down loop integrates player-authored cells indistinguishably from generator-emitted ones — *the architecture's "no cold-start" property now extends to player-authored-content as a first-class peer of generator-output and runtime-emission.*
+
 ### Substrate-authored vs culture-emergent — what world-gen Phase 1 actually authors
 
 The architecture follows a **strict austerity principle** about what gets pre-authored at world-gen Phase 1: the *substrate* is authored; *ideologies are not*. Following the same EVE-economy discipline applied to imperial-net products (every market shelf-item produced by NPC labor; no silent feeding mechanisms), the architecture extends the principle to *cultural belief*: every named ideology, religion, underground, or resistance-movement that exists in the simulation must have *emerged from player action* propagating through the architecture's existing mechanisms.
@@ -277,4 +279,4 @@ Above the four-tier hierarchy sits a fifth, **system-scale Dream-process**: the
 
 ---
 
-**Version:** 0.7.0 | **Created:** 2026-04-26 | **Updated:** 2026-04-27 | **Origin:** Split from architecture-index.md v0.7 (2026-04-26)
+**Version:** 0.7.0 | **Created:** 2026-04-26 | **Updated:** 2026-05-01 | **Origin:** Split from architecture-index.md v0.7 (2026-04-26)