diff --git a/.changeset/30455-manifest-list-serves-sourced-options.md b/.changeset/30455-manifest-list-serves-sourced-options.md
new file mode 100644
index 00000000000..761edb66c96
--- /dev/null
+++ b/.changeset/30455-manifest-list-serves-sourced-options.md
@@ -0,0 +1,14 @@
+---
+'@objectstack/service-settings': patch
+'@objectstack/spec': patch
+---
+
+fix(service-settings): the settings manifest list serves a sourced select's options, the table the save judges against, as the namespace read does
+
+Clause-②: no — the manifest list now states the table the save already enforces; nothing a caller sends is refused differently.
+Metadata-protocol: none
+
+A select key whose options come from the running system (`localization.locale`: the languages the deployment's i18n service reports) was served its live options only by the namespace read (`GET /api/settings/:namespace`). `SettingsService.getManifest()`, `SettingsService.listManifests()` and `GET /api/settings` still carried the declared table (the four codes `en-US`, `zh-CN`, `ja-JP`, `es-ES`), so a reader of the manifest list (the Setup hub, an SDK caller) was told a table that is not the one a save is judged against.
+
+- **Now.** All three are served through the same resolution as the namespace read: a sourced key carries its source's options; every other key, and a sourced key whose source has no answer (no i18n service in the composition), carries the declared table as before. `getManifest(namespace, display?)` and `listManifests(ctx?, display?)` take an optional display language; `GET /api/settings` passes the request's. The registered manifest is never changed.
+- **Spec.** The `valueDomain` description in `settings-manifest.zod.ts` names the runtime option source beside `valueDomain` as the other mover of a select's enforcement boundary: where a source answers, the declared `options` are the fallback.
diff --git a/packages/services/service-settings/src/localization-locale-options.test.ts b/packages/services/service-settings/src/localization-locale-options.test.ts
index 43fae8e381b..1b800eafc2e 100644
--- a/packages/services/service-settings/src/localization-locale-options.test.ts
+++ b/packages/services/service-settings/src/localization-locale-options.test.ts
@@ -121,11 +121,48 @@ describe('localization.locale serves the deployment\'s locale list', () => {
     expect(options.map((o) => o.value)).toEqual(['en-US', 'zh-CN', 'fr', 'vi-VN']);
     expect(options.slice(0, 3).map((o) => o.label)).toEqual(['English', '简体中文', 'Français']);
     expect(options[3].label).toBe(localeSelfName('vi-VN'));
-    // The registered manifest is left as declared.
+    // The registered manifest is left as declared: once the source has no
+    // answer, the manifest read is the declared four again.
+    booted.i18n.locales = [];
     const declared = (booted.service.getManifest('localization').specifiers as any[]).find((s) => s.key === 'locale');
     expect(declared.options.map((o: { value: string }) => o.value)).toEqual(['en-US', 'zh-CN', 'ja-JP', 'es-ES']);
   });
 
+  it('the manifest list serves the table the namespace read serves and the save judges against', async () => {
+    booted.i18n.locales = ['en', 'zh-CN', 'fr-FR', 'vi-VN'];
+    // An offered value in effect, so the namespace read offers the list as reported.
+    expect((await save(booted.http, { locale: 'fr-FR' })).status).toBe(200);
+
+    const list = await call(booted.http, 'GET /api/settings');
+    expect(list.status).toBe(200);
+    const listed = (list.body.data.manifests as any[])
+      .find((m) => m.namespace === 'localization')
+      .specifiers.find((s: { key?: string }) => s.key === 'locale').options as Array<{ value: string; label: string }>;
+    const page = servedLocaleOptions((await getPage(booted.http)).body);
+    expect(listed).toEqual(page);
+    expect(listed.map((o) => o.value)).toEqual(['en', 'zh-CN', 'fr-FR', 'vi-VN']);
+    // In-process readers are told the same table.
+    const read = (booted.service.getManifest('localization').specifiers as any[]).find((s) => s.key === 'locale');
+    expect(read.options).toEqual(listed);
+    const inProcess = booted.service.listManifests().find((m) => m.namespace === 'localization')!;
+    expect((inProcess.specifiers as any[]).find((s) => s.key === 'locale').options).toEqual(listed);
+
+    // The save's boundary is that table: every listed value saves, the
+    // declared `ja-JP` the list leaves out is refused naming the listed values.
+    for (const { value } of listed) {
+      expect((await save(booted.http, { locale: value })).status).toBe(200);
+    }
+    const refused = await save(booted.http, { locale: 'ja-JP' });
+    expect(refused.status).toBe(400);
+    expect(refused.body.error.details.fields).toEqual([
+      expect.objectContaining({
+        field: 'locale',
+        code: 'invalid_option',
+        constraint: { allowed: listed.map((o) => o.value).join(', ') },
+      }),
+    ]);
+  });
+
   it('accepts a language the deployment supports that the declared four never named', async () => {
     booted.i18n.locales = ['en', 'zh-CN', 'fr-FR'];
     const saved = await save(booted.http, { locale: 'fr-FR' });
diff --git a/packages/services/service-settings/src/settings-routes.ts b/packages/services/service-settings/src/settings-routes.ts
index 676c060ec62..4939ccf4986 100644
--- a/packages/services/service-settings/src/settings-routes.ts
+++ b/packages/services/service-settings/src/settings-routes.ts
@@ -273,8 +273,9 @@ export function registerSettingsRoutes(
   };
 
   mountFamilyRoute('get', base, {
-    async serve(_req, res, ctx) {
-      const manifests = service.listManifests(ctx);
+    async serve(req, res, ctx) {
+      // Served as the namespace read serves them: a sourced key's options.
+      const manifests = service.listManifests(ctx, { locale: requestLocaleOf(req) });
       sendOk(res, { manifests });
     },
     refuse(res, err) {
diff --git a/packages/services/service-settings/src/settings-service.ts b/packages/services/service-settings/src/settings-service.ts
index 8eb5aa98a40..0d3acb6be38 100644
--- a/packages/services/service-settings/src/settings-service.ts
+++ b/packages/services/service-settings/src/settings-service.ts
@@ -1572,11 +1572,16 @@ export class SettingsService {
     else console.error(message);
   }
 
-  /** Look up a manifest, or throw `UnknownNamespaceError`. */
-  getManifest(namespace: string): SettingsManifest {
+  /**
+   * Look up a manifest, or throw `UnknownNamespaceError`. A key with a
+   * registered option source carries the source's options, as the namespace
+   * read serves them ({@link servedManifest}); every other key carries its
+   * declared table. `display.locale` is the language the options are named in.
+   */
+  getManifest(namespace: string, display: SettingsDisplayOptions = {}): SettingsManifest {
     const reg = this.registry.get(namespace);
     if (!reg) throw new UnknownNamespaceError(namespace);
-    return reg.manifest;
+    return this.servedManifest(reg, namespace, {}, display);
   }
 
   /**
@@ -1605,10 +1610,16 @@ export class SettingsService {
     }
   }
 
-  /** List all registered manifests, optionally filtered by permission. */
-  listManifests(ctx: SettingsContext = {}): SettingsManifest[] {
+  /**
+   * List all registered manifests, optionally filtered by permission. Each is
+   * served as {@link getManifest} serves it: a sourced key carries the options
+   * the save judges against, not the declared table the source replaces.
+   */
+  listManifests(ctx: SettingsContext = {}, display: SettingsDisplayOptions = {}): SettingsManifest[] {
     const perms = new Set(ctx.permissions ?? []);
-    const all = Array.from(this.registry.values()).map((r) => r.manifest);
+    const all = Array.from(this.registry.entries()).map(([namespace, reg]) =>
+      this.servedManifest(reg, namespace, {}, display),
+    );
     // Empty permissions ⇒ pass-through ONLY for a trusted (non-enforced)
     // in-process caller. An ENFORCED HTTP caller with no capabilities sees only
     // the manifests it may read — never the whole set (Finding-1: an
@@ -1742,9 +1753,13 @@ export class SettingsService {
   }
 
   /**
-   * The manifest a page is served: the registered one, with each sourced
-   * key's `options` replaced by its source's answer for the value in effect.
-   * The registered manifest itself is never changed.
+   * The manifest a reader is served: the registered one, with each sourced
+   * key's `options` replaced by its source's answer. The one resolution every
+   * manifest read goes through: the namespace read passes the values in
+   * effect, so the answer can offer the stored value as stored;
+   * {@link getManifest} and {@link listManifests} pass none, and are served
+   * the options a write is judged against. The registered manifest itself is
+   * never changed.
    */
   private servedManifest(
     reg: RegisteredManifest,
diff --git a/packages/services/service-settings/src/settings-service.types.ts b/packages/services/service-settings/src/settings-service.types.ts
index 6bc2048c577..ab12f36baf9 100644
--- a/packages/services/service-settings/src/settings-service.types.ts
+++ b/packages/services/service-settings/src/settings-service.types.ts
@@ -500,7 +500,9 @@ export interface SettingsOptionSourceAnswer {
  * absent from the composition).
  *
  * Asked at the moment it is used, never recorded: on each save (the write's
- * acceptance), on each read of an `OS_*` override, and on each page read. It
+ * acceptance), on each read of an `OS_*` override, on each page read, and on
+ * each manifest read (`getManifest`, `listManifests`, `GET /api/settings`),
+ * so every reader of the key's options is told the table a save judges. It
  * is not asked when the manifest registers, because what it reads registers
  * later in the boot, so an `OS_*` override of such a key is judged when it is
  * read.
@@ -510,7 +512,8 @@ export type SettingsOptionSource = (input: {
    * The key's value in effect on the page being served, so the answer can
    * offer it as stored: under its own spelling when it is a second spelling
    * of an offered value, and named as no longer offered when it is not
-   * admitted. Absent when a write or an override is judged.
+   * admitted. Absent when a write or an override is judged, and when a
+   * manifest is read outside a page (`getManifest`, `listManifests`).
    */
   current?: unknown;
   /** The language the page is read in, {@link SettingsDisplayOptions.locale}. */
diff --git a/packages/spec/src/system/settings-manifest.zod.ts b/packages/spec/src/system/settings-manifest.zod.ts
index cc1a1859110..70de2665b7f 100644
--- a/packages/spec/src/system/settings-manifest.zod.ts
+++ b/packages/spec/src/system/settings-manifest.zod.ts
@@ -499,6 +499,17 @@ export const SpecifierSchema = lazySchema(() => z.object({
    * `sms.provider` — where "legal" means "this deployment ships an adapter for
    * it", not "some registrar published it". Do not add `valueDomain` to those.
    *
+   * **The one other boundary mover is a runtime option source.** A select whose
+   * legal values are what the running deployment supports (`localization.locale`:
+   * the languages its i18n service reports) has its table served by the
+   * settings service from that system, not from this declaration. Where a
+   * source answers, its options are what a write is judged against and what
+   * every manifest read serves (the namespace read and the manifest list
+   * alike); the declared `options` are the fallback, standing only while the
+   * source has no answer (the system it reads is absent from the composition).
+   * That is a runtime registration, not an authorable key: a manifest cannot
+   * declare one.
+   *
    * `pattern` / `minLength` / `maxLength` still apply and still narrow: they
    * constrain the *shape* of the string, the domain constrains its
    * *membership*. A value must satisfy both. Reach for `valueDomain` precisely