diff --git a/examples/app-showcase/src/datasets/chart-gallery.dataset.ts b/examples/app-showcase/src/datasets/chart-gallery.dataset.ts
index 5d41ac7f51..342b0e1afb 100644
--- a/examples/app-showcase/src/datasets/chart-gallery.dataset.ts
+++ b/examples/app-showcase/src/datasets/chart-gallery.dataset.ts
@@ -41,10 +41,11 @@ export const ShowcaseProjectDataset = defineDataset({
   ],
   measures: [
     { name: 'project_count', label: 'Projects', aggregate: 'count' },
-    // `budget`/`spent` are currency fields with NO declared currency code, so a
-    // hardcoded "$" misrepresents the amount (an amount with unspecified
-    // currency must not show a $ symbol). Use a plain grouped-number format;
-    // declare a `currency` on the field to get a locale-correct symbol via Intl.
+    // `budget`/`spent` are currency fields with NO declared currency code. The
+    // renderer resolves the symbol through the field's `currencyConfig.default-
+    // Currency` → the tenant `localization.currency` default (ADR-0053); with
+    // neither set it shows a plain grouped number (never a hardcoded "$"). To
+    // pin a symbol, set a field `currencyConfig` or a measure `currency`.
     { name: 'budget_sum', label: 'Total Budget', aggregate: 'sum', field: 'budget', format: '0,0' },
     { name: 'spent_sum', label: 'Total Spent', aggregate: 'sum', field: 'spent', format: '0,0' },
   ],
diff --git a/examples/app-showcase/src/objects/field-zoo.object.ts b/examples/app-showcase/src/objects/field-zoo.object.ts
index a405554249..df1bb58d20 100644
--- a/examples/app-showcase/src/objects/field-zoo.object.ts
+++ b/examples/app-showcase/src/objects/field-zoo.object.ts
@@ -41,7 +41,7 @@ export const FieldZoo = ObjectSchema.create({
 
     // ── Numbers ──────────────────────────────────────────────────────────
     f_number: Field.number({ label: 'Number', min: 0, max: 1000 }),
-    f_currency: Field.currency({ label: 'Currency', scale: 2, min: 0 }),
+    f_currency: Field.currency({ label: 'Currency', scale: 2, min: 0, currencyConfig: { currencyMode: 'fixed', defaultCurrency: 'USD', precision: 2 } }),
     f_percent: Field.percent({ label: 'Percent', min: 0, max: 100, defaultValue: 50 }),
 
     // ── Date & time ──────────────────────────────────────────────────────
diff --git a/skills/objectstack-data/rules/field-types.md b/skills/objectstack-data/rules/field-types.md
index 163aa155c6..7ab8611b35 100644
--- a/skills/objectstack-data/rules/field-types.md
+++ b/skills/objectstack-data/rules/field-types.md
@@ -197,12 +197,19 @@ What kind of data?
   type: 'currency',
   currencyConfig: {
     precision: 2,
-    currencyMode: 'multi',  // or 'single'
-    defaultCurrency: 'USD',
+    currencyMode: 'fixed',   // 'fixed' = one currency for the column;
+                             // 'dynamic' = per-record `{ value, currency }`
+    defaultCurrency: 'USD',  // ISO 4217
   },
 }
 ```
 
+**Currency resolution (ADR-0053).** A displayed amount resolves its symbol
+through: the field's own `currencyConfig.defaultCurrency` → the tenant
+`localization.currency` default. With neither set, renderers show a plain
+grouped number (never a hardcoded `$`). The same chain backs analytics measures
+(a measure's explicit `currency` wins over the field/tenant default).
+
 ### Select with Default
 
 ```typescript
diff --git a/skills/objectstack-i18n/SKILL.md b/skills/objectstack-i18n/SKILL.md
index 3a08dc2c29..5d86da329f 100644
--- a/skills/objectstack-i18n/SKILL.md
+++ b/skills/objectstack-i18n/SKILL.md
@@ -33,6 +33,11 @@ and integration with the I18nService.
 - You need to **detect missing or stale translations** (coverage analysis).
 - You are integrating **AI-powered translation suggestions**.
 - You are implementing **locale-specific formatting** (dates, numbers, currency).
+  > Workspace regional defaults — reference `timezone`, `locale`, and **`currency`**
+  > — live in the `localization` SETTINGS (tenant-scoped), are resolved onto every
+  > request's `ExecutionContext`, and are exposed to the client at
+  > `GET /api/v1/auth/me/localization`. `localization.currency` is the fallback a
+  > currency field/measure uses when it omits its own (ADR-0053).
 - You need to understand **translation file organization strategies** (bundled, per_locale, per_namespace).
 
 ---
diff --git a/skills/objectstack-ui/SKILL.md b/skills/objectstack-ui/SKILL.md
index ddf0a3d72f..283ce5f86e 100644
--- a/skills/objectstack-ui/SKILL.md
+++ b/skills/objectstack-ui/SKILL.md
@@ -937,6 +937,11 @@ defineDataset({
   dimensions: [{ name: 'signed_date', field: 'signed_date', type: 'date', dateGranularity: 'month' }],
   measures: [{ name: 'signed_count', aggregate: 'count' }],
 });
+// A monetary measure may declare `currency` (ISO 4217) for a locale-correct
+// symbol: `{ name: 'revenue', aggregate: 'sum', field: 'amount', currency: 'USD' }`.
+// It resolves measure `currency` → the aggregated field's
+// `currencyConfig.defaultCurrency` → the tenant `localization.currency` default
+// (ADR-0053). Omit it for non-money measures (count, avg-of-hours).
 
 // The widget just selects the dimension by name:
 { id: 'signed_by_month', type: 'line',