@@ -0,0 +1,16 @@
+---
+'@objectstack/spec': patch
+---
+
+docs(spec): the `currencyConfig.currencyMode` description says what the runtime does with each mode, and no longer calls `dynamic` "user selectable" (#20126)
+
+Clause-②: no
+
+The old text read "dynamic (user selectable) or fixed (single currency)". No key, stored value or runtime path lets anyone pick a currency per record. The value is a bare number in both modes (ADR-0104 D1), and the currency code lives in field config. What the runtime does, and what the description now says:
+
+- **`fixed`**: the field has one currency, `defaultCurrency`.
+- **`dynamic`** (the default): the field has no currency of its own. Amounts display in the tenant default currency, which is the `localization.currency` setting. When that setting is not set, amounts display as a plain number. `defaultCurrency` is not read.
+
+The field faces follow this rule, and so do analytics dataset measure columns and the publish-time precision check.
+
+Only the description text changes. The accepted keys and values, the defaults (`dynamic`, `CNY`) and parse output are the same as before. The generated reference page `content/docs/references/data/field.mdx` is regenerated from the new text.
@@ -464,8 +464,16 @@ The **cube's metric/dimension definition** (`MetricSchema.label` / `MetricSchema
 ([#6442](https://github.com/objectstack-ai/objectstack/issues/6442)). So a client that
 renders table headers or formats amounts takes `label` / `format` / `currency` /
 `percentScale` off the query result's `fields[]`: those are resolved server-side (the
-ADR-0053 currency chain, the percent-scale chain), and `format` is not reachable through
+currency chain below, the percent-scale chain), and `format` is not reachable through
 the metadata endpoint at all.
+
+The currency chain runs on the dataset query (`POST /analytics/dataset/query`). A
+monetary measure column takes the measure's own `currency`; then, only when the source
+field is `currencyMode: 'fixed'`, that field's `currencyConfig.defaultCurrency`; then the
+tenant default currency (the `localization.currency` setting), if one is set. A
+`dynamic` field (the default mode) never lends its `defaultCurrency` — only `fixed` does —
+so its column shows the tenant default. The cube query on this page carries no column
+`currency`.
 </Callout>
 
 ### `GET /analytics/meta`
 
@@ -152,10 +152,10 @@ These properties apply to **all** field types and are validated by the base `Fie
 | `min` | `number` | — | Minimum monetary value |
 | `max` | `number` | — | Maximum monetary value |
 | `currencyConfig.precision` | `number` | `2` | Decimal places (0–10) |
-| `currencyConfig.currencyMode` | `enum` | `dynamic` | `dynamic` (user-selectable) or `fixed` (single currency) |
-| `currencyConfig.defaultCurrency` | `string` | `CNY` | 3-character currency code (ISO 4217 or crypto) |
+| `currencyConfig.currencyMode` | `enum` | `dynamic` | `fixed` pins the field to `defaultCurrency`, and an authored `precision` must agree with that currency's ISO 4217 fraction digits; `dynamic` displays the tenant default currency (the `localization.currency` setting). Not a per-record choice |
+| `currencyConfig.defaultCurrency` | `string` | `CNY` | 3-character currency code (ISO 4217 or crypto): the field's currency under `fixed`; not the displayed currency under `dynamic` |
 
-**Default constraints:** Stored as a **bare number** (a finite numeric scalar — `valueSchemaFor` routes `currency` to `z.number().finite()`); there is no `{ value, currency }` envelope on the value path. The per-record currency **code** is a separate concern, carried by `currencyConfig` above. Precision defaults to 2 decimal places.
+**Default constraints:** Stored as a **bare number** (a finite numeric scalar — `valueSchemaFor` routes `currency` to `z.number().finite()`); there is no `{ value, currency }` envelope on the value path. The currency **code** is never stored per record: it is field configuration, carried by `currencyConfig` above. Precision defaults to 2 decimal places.
 
 ### `percent`
 
 
@@ -50,7 +50,7 @@ export default defineStack({
         // Person references target the platform user object `sys_user`
         owner: { label: 'Owner', type: 'lookup', reference: 'sys_user' },
         due_date: { label: 'Due Date', type: 'date' },
-        budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, defaultCurrency: 'USD' } },
+        budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, currencyMode: 'fixed', defaultCurrency: 'USD' } },
       }
     }
   ]
@@ -79,7 +79,7 @@ export default defineStack({
         // Person references target the platform user object `sys_user`
         owner: { label: 'Owner', type: 'lookup', reference: 'sys_user' },
         due_date: { label: 'Due Date', type: 'date' },
-        budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, defaultCurrency: 'USD' } },
+        budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, currencyMode: 'fixed', defaultCurrency: 'USD' } },
       },
     },
   },
 
@@ -294,7 +294,7 @@ annual_revenue:
   currencyConfig:
     precision: 2
     currencyMode: fixed
-    defaultCurrency: USD
+    defaultCurrency: USD   # the field's currency under fixed
 ```
 
 **Storage:** a **bare number** — the same value shape as `number`.
@@ -305,8 +305,11 @@ annual_revenue:
 
 <Callout type="warn">
 A currency value is **not** a `{ value, currency }` object. The currency *code*
-lives once on the field definition (`currencyConfig.defaultCurrency`), not on
-every stored value. The old per-value object shape (`CurrencyValueSchema`) was
+is field configuration, never stored per value: under `currencyMode: fixed` it is
+`currencyConfig.defaultCurrency` (the field's one currency, as `fixed` pins it);
+under `dynamic`, the default, it is the tenant default currency (the
+`localization.currency` setting) and `defaultCurrency` is not the displayed
+currency. The old per-value object shape (`CurrencyValueSchema`) was
 never consumed by the validator, the driver, or import coercion and is
 deprecated in the spec.
 </Callout>
 
@@ -28,7 +28,7 @@ const result = CurrencyConfigSchema.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **precision** | `integer` | optional (default: `2`) | Decimal precision (default: 2) |
-| **currencyMode** | `Enum<'dynamic' \| 'fixed'>` | optional (default: `"dynamic"`) | Currency mode: dynamic (user selectable) or fixed (single currency) |
+| **currencyMode** | `Enum<'dynamic' \| 'fixed'>` | optional (default: `"dynamic"`) | Currency mode. `fixed`: the field has one currency, `defaultCurrency`. `dynamic` (the default): the field has no currency of its own — amounts display in the tenant default currency (the `localization.currency` setting; a plain number when none is set) and `defaultCurrency` is not read. Neither mode is a per-record choice: the value is a bare number either way. |
 | **defaultCurrency** | `string` | optional (default: `"CNY"`) | Default or fixed currency code (ISO 4217, e.g., USD, CNY, EUR) |
 
 
@@ -236,7 +236,7 @@ const result = CurrencyConfigSchema.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **precision** | `integer` | optional (default: `2`) | Decimal precision (default: 2) |
-| **currencyMode** | `Enum<'dynamic' \| 'fixed'>` | optional (default: `"dynamic"`) | Currency mode: dynamic (user selectable) or fixed (single currency) |
+| **currencyMode** | `Enum<'dynamic' \| 'fixed'>` | optional (default: `"dynamic"`) | Currency mode. `fixed`: the field has one currency, `defaultCurrency`. `dynamic` (the default): the field has no currency of its own — amounts display in the tenant default currency (the `localization.currency` setting; a plain number when none is set) and `defaultCurrency` is not read. Neither mode is a per-record choice: the value is a bare number either way. |
 | **defaultCurrency** | `string` | optional (default: `"CNY"`) | Default or fixed currency code (ISO 4217, e.g., USD, CNY, EUR) |
 
 ### Nested Shape: `Field.maskingRule`
 
@@ -48,7 +48,7 @@
  * | `label`            | `measure.label` / `dimension.label` + `ctx.locale` (#6761) |
  * | `format`           | `measure.format`                                 |
  * | `builtinAggregate` | `measure.aggregate` + `measure.label == null` (#14492) |
- * | `currency`         | ADR-0053 chain: `measure.currency` → `sourceFieldMeta().defaultCurrency` → `ctx.currency` |
+ * | `currency`         | `measure.currency` → the source field's FIXED currency (`sourceFieldMeta().defaultCurrency`, relayed only under `currencyMode: 'fixed'`) → `ctx.currency` |
  * | `percentScale`     | `measure.derived.op === 'ratio'`, else `percentScaleOf(sourceFieldMeta())` (objectui#3136) |
  * | `type`             | `measureResultType(measure.aggregate, sourceFieldMeta().type)` (#16101) |
  *
@@ -279,15 +279,15 @@ describe('#16097 — a preview response describes its measure columns like the l
     expect(preview.total_amount.builtinAggregate).toBeUndefined();
   });
 
-  it('currency (ADR-0053) — the sourceFieldMeta limb resolves on the preview path', async () => {
+  it('currency — the fixed-field limb (sourceFieldMeta().defaultCurrency) resolves on the preview path', async () => {
     const { live, preview } = await bothPaths();
     expect(live.total_amount.currency).toBe('EUR');
     expect(preview.total_amount.currency).toBe('EUR');
   });
 
-  it('currency (ADR-0053) — the ExecutionContext limb reaches the preview path too', async () => {
+  it('currency — the ExecutionContext (tenant default) limb reaches the preview path too', async () => {
     const { live, preview } = await bothPaths();
-    // No measure currency, no field default ⇒ the tenant default on `ctx`.
+    // No measure currency, no fixed field currency ⇒ the tenant default on `ctx`.
     expect(live.total_fee.currency).toBe('USD');
     expect(preview.total_fee.currency).toBe('USD');
     // A non-monetary measure never acquires one, on either path.
 
@@ -122,7 +122,10 @@ describe('AnalyticsService.queryDataset', () => {
     expect(revenueField?.format).toBe('0,0');
   });
 
-  // ── ADR-0053 currency chain (measure → field currencyConfig → tenant ctx) ──
+  // ── currency chain (measure → the field's FIXED currency → tenant ctx) ──
+  // `sourceFieldMeta().defaultCurrency` is the field's fixed currency: the
+  // plugin relays `currencyConfig.defaultCurrency` only under
+  // `currencyMode: 'fixed'`, so a `dynamic` field reaches `ctx.currency`.
   function pricedSvc(rows: Array<Record<string, unknown>>, sourceFieldMeta?: (o: string, f: string) => { type?: string; defaultCurrency?: string; max?: number } | undefined) {
     return new AnalyticsService({
       queryCapabilities: () => ({ nativeSql: true, objectqlAggregate: false, inMemory: false }),
 
@@ -436,7 +436,7 @@ export const CurrencyConfigSchema = lazySchema(() => strictObject({
     description: 'Decimal precision (default: 2)',
     default: 2,
   }),
-  currencyMode: z.enum(['dynamic', 'fixed']).default('dynamic').describe('Currency mode: dynamic (user selectable) or fixed (single currency)'),
+  currencyMode: z.enum(['dynamic', 'fixed']).default('dynamic').describe('Currency mode. `fixed`: the field has one currency, `defaultCurrency`. `dynamic` (the default): the field has no currency of its own — amounts display in the tenant default currency (the `localization.currency` setting; a plain number when none is set) and `defaultCurrency` is not read. Neither mode is a per-record choice: the value is a bare number either way.'),
   defaultCurrency: z.string().length(3).default('CNY').describe('Default or fixed currency code (ISO 4217, e.g., USD, CNY, EUR)'),
 }).superRefine((config, ctx) => {
   // #7918 (maintainer ruling 2026-08-12, Option A): an AUTHORED `precision`
Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ export default defineStack({`
`50`	`50`	// Person references target the platform user object `sys_user`
`51`	`51`	`owner: { label: 'Owner', type: 'lookup', reference: 'sys_user' },`
`52`	`52`	`due_date: { label: 'Due Date', type: 'date' },`
`53`		`- budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, defaultCurrency: 'USD' } },`
	`53`	`+ budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, currencyMode: 'fixed', defaultCurrency: 'USD' } },`
`54`	`54`	`}`
`55`	`55`	`}`
`56`	`56`	`]`
`@@ -79,7 +79,7 @@ export default defineStack({`
`79`	`79`	// Person references target the platform user object `sys_user`
`80`	`80`	`owner: { label: 'Owner', type: 'lookup', reference: 'sys_user' },`
`81`	`81`	`due_date: { label: 'Due Date', type: 'date' },`
`82`		`- budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, defaultCurrency: 'USD' } },`
	`82`	`+ budget: { label: 'Budget', type: 'currency', currencyConfig: { precision: 2, currencyMode: 'fixed', defaultCurrency: 'USD' } },`
`83`	`83`	`},`
`84`	`84`	`},`
`85`	`85`	`},`