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/js-hoist-intl.md

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+---
+title: Hoist Intl Formatter Creation
+impact: LOW-MEDIUM
+impactDescription: avoids expensive object recreation
+tags: javascript, intl, optimization, memoization
+---
+
+## Hoist Intl Formatter Creation
+
+Don't create `Intl.DateTimeFormat`, `Intl.NumberFormat`, or
+`Intl.RelativeTimeFormat` inside render or loops. These are expensive to
+instantiate. Hoist to module scope when the locale/options are static.
+
+**Incorrect (new formatter every render):**
+
+```tsx
+function Price({ amount }: { amount: number }) {
+  const formatter = new Intl.NumberFormat('en-US', {
+    style: 'currency',
+    currency: 'USD',
+  })
+  return <Text>{formatter.format(amount)}</Text>
+}
+```
+
+**Correct (hoisted to module scope):**
+
+```tsx
+const currencyFormatter = new Intl.NumberFormat('en-US', {
+  style: 'currency',
+  currency: 'USD',
+})
+
+function Price({ amount }: { amount: number }) {
+  return <Text>{currencyFormatter.format(amount)}</Text>
+}
+```
+
+**For dynamic locales, memoize:**
+
+```tsx
+const dateFormatter = useMemo(
+  () => new Intl.DateTimeFormat(locale, { dateStyle: 'medium' }),
+  [locale]
+)
+```
+
+**Common formatters to hoist:**
+
+```tsx
+// Module-level formatters
+const dateFormatter = new Intl.DateTimeFormat('en-US', { dateStyle: 'medium' })
+const timeFormatter = new Intl.DateTimeFormat('en-US', { timeStyle: 'short' })
+const percentFormatter = new Intl.NumberFormat('en-US', { style: 'percent' })
+const relativeFormatter = new Intl.RelativeTimeFormat('en-US', {
+  numeric: 'auto',
+})
+```
+
+Creating `Intl` objects is significantly more expensive than `RegExp` or plain
+objects—each instantiation parses locale data and builds internal lookup tables.