Initial commit — Singular Particular Space v1

Homepage (site/index.html): integration-v14 promoted, Writings section
integrated with 33 pieces clustered by type (stories/essays/miscellany),
Writings welcome lightbox, content frame at 98% opacity.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

skills/react-native-skills/rules/list-performance-virtualize.md

@@ -0,0 +1,67 @@
+---
+title: Use a List Virtualizer for Any List
+impact: HIGH
+impactDescription: reduced memory, faster mounts
+tags: lists, performance, virtualization, scrollview
+---
+
+## Use a List Virtualizer for Any List
+
+Use a list virtualizer like LegendList or FlashList instead of ScrollView with
+mapped children—even for short lists. Virtualizers only render visible items,
+reducing memory usage and mount time. ScrollView renders all children upfront,
+which gets expensive quickly.
+
+**Incorrect (ScrollView renders all items at once):**
+
+```tsx
+function Feed({ items }: { items: Item[] }) {
+  return (
+    <ScrollView>
+      {items.map((item) => (
+        <ItemCard key={item.id} item={item} />
+      ))}
+    </ScrollView>
+  )
+}
+// 50 items = 50 components mounted, even if only 10 visible
+```
+
+**Correct (virtualizer renders only visible items):**
+
+```tsx
+import { LegendList } from '@legendapp/list'
+
+function Feed({ items }: { items: Item[] }) {
+  return (
+    <LegendList
+      data={items}
+      // if you aren't using React Compiler, wrap these with useCallback
+      renderItem={({ item }) => <ItemCard item={item} />}
+      keyExtractor={(item) => item.id}
+      estimatedItemSize={80}
+    />
+  )
+}
+// Only ~10-15 visible items mounted at a time
+```
+
+**Alternative (FlashList):**
+
+```tsx
+import { FlashList } from '@shopify/flash-list'
+
+function Feed({ items }: { items: Item[] }) {
+  return (
+    <FlashList
+      data={items}
+      // if you aren't using React Compiler, wrap these with useCallback
+      renderItem={({ item }) => <ItemCard item={item} />}
+      keyExtractor={(item) => item.id}
+    />
+  )
+}
+```
+
+Benefits apply to any screen with scrollable content—profiles, settings, feeds,
+search results. Default to virtualization.