Run 13: the full world - four towns, resources, bonds, spatial grid

World scaled 3x (768x768) with all four towns at compass points, each
running its own soul culture: North generational, South nature, West
materialist (new profile), East selfish. Two new resources: Ore (metal
tier) and Herb (medicine - mends health, reason to forage, trade good).
Spatial hash grid replaces O(n^2) proximity scans (soul pressure,
neighbor, teacher) - 3.6x headless speedup at ~80 NPCs. First social
verb beyond work: pair-bonds - settled adults who keep warm company pair
up; warmth now accrues from proximity not only gifts; bonds break at
death. Reproduction deferred (bonds-first per plan).

The four-town thesis fully realized on one engine (240-day run):
North know 1.27 clean, South nourish 0.85 clean, West prosperous but
debris 0.23, East hungriest 0.60 and lowest knowledge 1.08. Positive
cultures stay soul-clean, negative ones carry real debris, all from
behavior weights - nothing scripted. 99 bonds, 80 deaths, four living
societies.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/SoulProfile.cs

@@ -89,6 +89,25 @@ public class SoulProfile
         TeachingDrive  = 0.9f,   // and to hand it down in turn — the whole culture
     };
 
+    /// <summary>
+    /// West-weighted profile: worth measured in visible possessions
+    /// (DESIGN.md). They build — even communally — but for display, so they
+    /// expand shelters hard (status is size); moderate generosity, moderate
+    /// hoarding, little interest in learning or teaching. A functioning town
+    /// whose surplus goes to ostentation rather than resilience.
+    /// </summary>
+    public static SoulProfile MaterialistSoul() => new()
+    {
+        Type           = SoulType.Materialist,
+        Generosity     = 0.4f,
+        Sustainability = 0.6f,
+        CommunityBias  = 0.6f,
+        StatusBias     = 0.9f,
+        Accumulation   = 0.6f,
+        Absorption     = 0.9f,
+        TeachingDrive  = 0.2f,
+    };
+
     /// <summary>
     /// East-weighted profile — not part of MVP behavior, but defined now for
     /// the end-of-MVP contrast test (SPEC §11 amendment): 3 selfish NPCs