@@ -0,0 +1,15 @@
+---
+'@objectstack/lint': minor
+---
+
+`os validate`, `os build` and `os lint` now check an action translation's result-dialog copy against whether the action declares a `resultDialog`, under both `objects.OBJECT._actions.ACTION` and `globalActions.ACTION`.
+
+Clause-②: no (narrowing)
+
+<!-- adr-0087: not-required (no-migration-prescription) No spec key, export or stored value moves: TranslationDataSchema parses these three keys exactly as before, so objectstack migrate meta has nothing to convert, and the runtime publish door never runs this rule on a translation write (the member's runtime types default to flow). The refusal is a lint finding at the authoring doors that names the key; its remedy is the author's choice between moving the copy, declaring the dialog or deleting the copy, not a mechanical rewrite of one shape into another. -->
+
+**What is refused.** `resultDialog.title`, `resultDialog.description` and `resultDialog.acknowledge` under an action that declares no `resultDialog` are now `translation-target-unknown` errors, one per key: the code and level an undeclared `params`, `outcomeMessages` or `resultDialog.fields` key already gets. `translateAction` returns no dialog for such an action, so the copy is never read. Before this, only `resultDialog.fields.PATH` was checked under the dialog, and these three keys passed.
+
+**What still passes.** The same three keys under an action that declares a `resultDialog` are read and pass, whether or not the dialog sets that text itself.
+
+**BREAKING** — an accept-set narrowing at the `os validate`, `os build` and `os lint` doors, shipped as `minor` under the launch-window convention. **What changes for a project.** A bundle that carries one of these keys under an action with no `resultDialog` now fails `os validate` with exit 1 instead of passing, and `os build` refuses it. The fix is to move the keys under the action that declares the dialog, declare the `resultDialog` on the action if it should show one, or delete the keys. The four example apps (`app-crm`, `app-todo`, `app-showcase`, `app-multi-package`) and the bundle shipped with `@objectstack/platform-objects` produce no finding on these keys, so none of their exit codes change.
@@ -1036,6 +1036,10 @@ name, the package's own record is the one a field's options, an action's params,
 a dashboard's widgets and header actions, or a flow's screens are judged against;
 every other name the two declare adds up.
 
+A row that starts `{action}.` holds at both action addresses,
+`objects.{object}._actions.{action}` and `globalActions.{action}`: the keys
+beneath an action entry are judged the same way under either.
+
 | Key | Resolves when it names |
 |:---|:---|
 | `objects.{object}` | an object declared by this stack **or a sibling package of the same artifact** — its keys are then judged row by row below; **or** a platform object, or an object an `objectExtensions[]` entry extends that no package of the artifact declares — both skipped whole, because the owner's fields are not visible from here |
@@ -1046,8 +1050,12 @@ every other name the two declare adds up.
 | `objects.{object}._tabs.{tab}` | a filter-preset tab's `name` in `interfaceConfig.userFilters.tabs` on a page over that object (`interfaceConfig.source`, else the page's `object`) — a list view's own `tabs` has no renderer and is not resolvable |
 | `objects.{object}._validations.{rule}` | a validation rule's `name` in that object's `validations[]` or in an `objectExtensions[]` entry aimed at it — a `conditional` rule's `then` / `otherwise` branch included |
 | `objects.{object}._actions.{action}` | an action bound to that object: one in its `actions`, or a stack-level action whose `objectName` is that object |
-| `objects.{object}._actions.{action}.params.{param}` | a param's `name` on that action |
-| `globalActions.{action}` | an action with **no** `objectName` — a key naming a bound action is reported with the `objects.{owner}._actions` key the resolver reads instead |
+| `globalActions.{action}` | an action with **no** `objectName` — a key naming a bound action is an error whose message names the `objects.{owner}._actions.{action}` key to write instead, `{owner}` being the action's own `objectName` |
+| `{action}.params.{param}` | a param's `name` on that action |
+| `{action}.params.{param}.options.{value}` | an option's stored **`value`** in that param's inline `options` — a warning, as on a field. A param that references a `field` and declares no inline `options` takes the field's list when the dialog renders, so its option keys are not judged |
+| `{action}.outcomeMessages.{outcome}` | an outcome the action's own `outcomeMessages` declares |
+| `{action}.resultDialog.fields.{path}` | the literal `path` of a field the action's `resultDialog.fields[]` declares — dots included, so `client.secret` is one key |
+| `{action}.resultDialog.title` / `.description` / `.acknowledge` | an action that declares a `resultDialog`, whether or not the dialog sets that text itself — for an action that declares none, nothing reads the dialog's copy |
 | `apps.{app}` | an app declared, or one a `navigationContributions` entry anywhere in the artifact contributes into — including an app owned outside the artifact |
 | `apps.{app}.navigation.{id}` | a navigation item `id` the app declares (nested `children` and `areas[]` included) or one contributed into it; under an app that is only contributed into, the contributed ids alone |
 | `dashboards.{dash}` / `.widgets.{id}` / `.actions.{actionUrl}` | a dashboard declared / a widget `id` on it / a header action's `actionUrl` on it |
 
@@ -3082,6 +3082,8 @@ describe('validateTranslationReferences — object-branch coverage vs the schema
  * `params.<name>` was the only one judged; `outcomeMessages.<outcome>` (#21095)
  * and `resultDialog.fields.<path>` joined the shape with no leg following, so a
  * key the action does not declare parsed, linted clean and was read by nothing.
+ * The dialog's prose leaves followed in #21264: under an action with no
+ * `resultDialog` they are read by nothing either.
  */
 describe('validateTranslationReferences — keyed children of an action entry (#21216)', () => {
   /**
@@ -3228,6 +3230,53 @@ describe('validateTranslationReferences — keyed children of an action entry (#
     });
   });
 
+  /**
+   * #21264 — the dialog's prose leaves. `resolveActionResultDialog` returns
+   * before any lookup when the action declares no `resultDialog`, so these are
+   * judged on that one fact; under a declared dialog every leaf is read, even
+   * one the dialog does not author itself (`mint_token` declares no `title`).
+   */
+  describe('resultDialog.title / .description / .acknowledge', () => {
+    it('refuses each leaf under `_actions.<name>` when the action declares no `resultDialog`, at the code and level `params` uses', () => {
+      const findings = validateTranslationReferences(
+        actionStack(
+          onEnv({
+            plain_env: {
+              label: '普通',
+              resultDialog: { title: '无对话框', description: '无说明', acknowledge: '知道了', fields: { token: '令牌' } },
+            },
+          }),
+        ),
+      );
+      expect(findings.map((f) => [f.rule, f.severity, f.path])).toEqual([
+        [TRANSLATION_TARGET_UNKNOWN, 'error', `${ENV}.plain_env.resultDialog.title`],
+        [TRANSLATION_TARGET_UNKNOWN, 'error', `${ENV}.plain_env.resultDialog.description`],
+        [TRANSLATION_TARGET_UNKNOWN, 'error', `${ENV}.plain_env.resultDialog.acknowledge`],
+        [TRANSLATION_TARGET_UNKNOWN, 'error', `${ENV}.plain_env.resultDialog.fields.token`],
+      ]);
+    });
+
+    it('refuses a leaf under `globalActions.<name>` when the object-less action declares no `resultDialog`', () => {
+      const findings = validateTranslationReferences(
+        actionStack({ globalActions: { check_updates: { resultDialog: { acknowledge: '好的' } } } }),
+      );
+      expect(findings.map((f) => [f.rule, f.severity, f.path])).toEqual([
+        [TRANSLATION_TARGET_UNKNOWN, 'error', `${GLOBAL}.check_updates.resultDialog.acknowledge`],
+      ]);
+    });
+
+    it('accepts every leaf under a declared dialog at both addresses, one the dialog does not author included (the control)', () => {
+      expect(
+        validateTranslationReferences(
+          actionStack({
+            ...onEnv({ rotate_secret: { resultDialog: { title: '密钥', description: '请保存', acknowledge: '已保存' } } }),
+            globalActions: { mint_token: { resultDialog: { title: '令牌', description: '请保存', acknowledge: '已保存' } } },
+          }),
+        ),
+      ).toEqual([]);
+    });
+  });
+
   describe('params.<name>.options.<value>', () => {
     it('warns on an option key a declared param does not declare, as the field `options` leg does', () => {
       const findings = validateTranslationReferences(
@@ -3304,13 +3353,19 @@ describe('validateTranslationReferences — keyed children of an action entry (#
     };
 
     type Address = 'bound' | 'global';
-    /** Which declared action a ghost is written under, per address. */
-    const HOST: Record<'outcome' | 'dialog', Record<Address, string>> = {
+    type Host = 'outcome' | 'dialog' | 'noDialog';
+    /**
+     * Which declared action a ghost is written under, per address. `noDialog`
+     * names an action that declares no `resultDialog`: the dialog's leaves
+     * reference the declaration of the dialog itself (#21264).
+     */
+    const HOST: Record<Host, Record<Address, string>> = {
       outcome: { bound: 'archive_env', global: 'check_updates' },
       dialog: { bound: 'rotate_secret', global: 'mint_token' },
+      noDialog: { bound: 'plain_env', global: 'check_updates' },
     };
     type Coverage =
-      | { kind: 'reference-checked'; host: 'outcome' | 'dialog'; ghost: Record<string, unknown>; suffix: string; rule: string }
+      | { kind: 'reference-checked'; host: Host; ghost: Record<string, unknown>; suffix: string; rule: string }
       | { kind: 'leaf-copy' | 'container'; why: string };
 
     const COVERAGE: Record<string, Coverage> = {
@@ -3342,10 +3397,31 @@ describe('validateTranslationReferences — keyed children of an action entry (#
         suffix: '.params.mode.options.ghost_value',
         rule: TRANSLATION_OPTION_KEY_UNKNOWN,
       },
-      resultDialog: { kind: 'container', why: 'a fixed-key node; its keyed child is `resultDialog.fields`' },
-      'resultDialog.title': { kind: 'leaf-copy', why: 'prose' },
-      'resultDialog.description': { kind: 'leaf-copy', why: 'prose' },
-      'resultDialog.acknowledge': { kind: 'leaf-copy', why: 'prose' },
+      resultDialog: {
+        kind: 'container',
+        why: 'a fixed-key node; its leaves and its keyed child `resultDialog.fields` are each judged below',
+      },
+      'resultDialog.title': {
+        kind: 'reference-checked',
+        host: 'noDialog',
+        ghost: { resultDialog: { title: 'x' } },
+        suffix: '.resultDialog.title',
+        rule: TRANSLATION_TARGET_UNKNOWN,
+      },
+      'resultDialog.description': {
+        kind: 'reference-checked',
+        host: 'noDialog',
+        ghost: { resultDialog: { description: 'x' } },
+        suffix: '.resultDialog.description',
+        rule: TRANSLATION_TARGET_UNKNOWN,
+      },
+      'resultDialog.acknowledge': {
+        kind: 'reference-checked',
+        host: 'noDialog',
+        ghost: { resultDialog: { acknowledge: 'x' } },
+        suffix: '.resultDialog.acknowledge',
+        rule: TRANSLATION_TARGET_UNKNOWN,
+      },
       'resultDialog.fields': {
         kind: 'reference-checked',
         host: 'dialog',
 
@@ -1119,9 +1119,9 @@ function buildUniverse(stack: AnyRec): Universe {
   //
   // ⛔ A name-only fold is wrong here for a reason peculiar to this rung: the
   // stored RECORD is itself read downstream — `checkActionEntry` judges
-  // `params.<name>`, `outcomeMessages.<outcome>` and `resultDialog.fields.<path>`
-  // off it — so folding a bare name would resolve the action key and then
-  // report every one of those keyed children as an orphan.
+  // `params.<name>`, `outcomeMessages.<outcome>`, `resultDialog.fields.<path>`
+  // and the dialog's own leaves off it — so folding a bare name would resolve
+  // the action key and then report every one of those children as an orphan.
   //
   // ⚠️ And the OWNER is read from the record too, which is what keeps the
   // widening honest: an action a sibling binds to an object joins that object's
@@ -1534,6 +1534,7 @@ export function validateTranslationReferences(stack: AnyRec): TranslationRefFind
         }
 
         // _actions.<name>[.params.<name>[.options.<value>] | .outcomeMessages.<outcome>
+        //                 | .resultDialog.(title|description|acknowledge)
         //                 | .resultDialog.fields.<path>] — see `checkActionEntry`
         for (const [actionName, rawAction] of Object.entries(asRecord(rawNode._actions))) {
           const actionPath = `${objPath}._actions.${actionName}`;
@@ -1842,25 +1843,34 @@ interface ActionEntryContext {
 }
 
 /**
- * Every KEYED child of one action's translation entry, judged against the
- * declaration the resolver reads it through (#21216).
+ * Every child of one action's translation entry that hangs off something the
+ * action declares, judged against that declaration through the resolver that
+ * reads it (#21216, #21264).
  *
  * Four groups under an action entry are records keyed by a name the action
  * itself declares, and `translateAction` (`@objectstack/spec/system`, the
  * resolver objectui's `useObjectLabel` mirrors) walks the DECLARED side of each,
  * never the bundle's keys — so a key the declaration does not carry is read by
- * nothing, and its copy silently never shows:
- *
- *   | bundle key                         | declared by                          | read by                         |
- *   |------------------------------------|--------------------------------------|---------------------------------|
- *   | `params.<name>`                    | `params[].name` (`field` fallback)   | `translateActionParams`         |
- *   | `params.<name>.options.<value>`    | that param's inline `options[].value`| `translateActionParams`         |
- *   | `outcomeMessages.<outcome>`        | the action's `outcomeMessages` keys  | `resolveActionOutcomeMessages`  |
- *   | `resultDialog.fields.<path>`       | `resultDialog.fields[].path`         | `resolveActionResultDialog`     |
+ * nothing, and its copy silently never shows. The result dialog's own leaves
+ * are prose, but they hang off a node the action may not declare at all, and
+ * `resolveActionResultDialog` returns before reading any of them when it
+ * declares none:
+ *
+ *   | bundle key                          | declared by                          | read by                         |
+ *   |-------------------------------------|--------------------------------------|---------------------------------|
+ *   | `params.<name>`                     | `params[].name` (`field` fallback)   | `translateActionParams`         |
+ *   | `params.<name>.options.<value>`     | that param's inline `options[].value`| `translateActionParams`         |
+ *   | `outcomeMessages.<outcome>`         | the action's `outcomeMessages` keys  | `resolveActionOutcomeMessages`  |
+ *   | `resultDialog.fields.<path>`        | `resultDialog.fields[].path`         | `resolveActionResultDialog`     |
+ *   | `resultDialog.title` / `.description` / `.acknowledge` | the action's `resultDialog`, present at all | `resolveActionResultDialog` |
+ *
+ * A dialog leaf under a DECLARED dialog is read whether or not the dialog
+ * authors that leaf itself — the resolver overlays a translated `title` onto a
+ * dialog that declares none — so declaring the dialog is the whole condition.
  *
  * The leaf keys beside them (`label`, `description`, `confirmText`,
- * `successMessage`, `resultDialog.title` …) are prose with no identifier to
- * resolve, as on the object branch.
+ * `successMessage`) are prose on a node that resolved, read whenever the
+ * action is, as on the object branch.
  *
  * ⛔ One vocabulary: a key naming a target the action does not declare is
  * `translation-target-unknown` at `params`' severity; an OPTION key keyed off
@@ -1871,6 +1881,7 @@ interface ActionEntryContext {
 function checkActionEntry(findings: TranslationRefFinding[], ctx: ActionEntryContext): void {
   checkActionParams(findings, ctx);
   checkActionOutcomeMessages(findings, ctx);
+  checkActionResultDialogLeaves(findings, ctx);
   checkActionResultDialogFields(findings, ctx);
 }
 
@@ -2038,6 +2049,41 @@ function checkActionOutcomeMessages(findings: TranslationRefFinding[], ctx: Acti
   }
 }
 
+/** The result dialog's prose leaves — every key `ActionResultDialogTranslationSchema` declares beside `fields`. */
+const RESULT_DIALOG_LEAVES = ['title', 'description', 'acknowledge'] as const;
+
+/**
+ * `resultDialog.title` / `.description` / `.acknowledge` — prose, but prose
+ * for a dialog the action must declare.
+ *
+ * `resolveActionResultDialog` returns the action's own `resultDialog` untouched
+ * when it has none, before any lookup, so under an action that declares no
+ * `resultDialog` these leaves are read by nothing: the bundle cannot add a
+ * dialog, only translate one. Under a declared dialog every leaf is read, even
+ * one the dialog does not author itself, so nothing further is judged there.
+ */
+function checkActionResultDialogLeaves(findings: TranslationRefFinding[], ctx: ActionEntryContext): void {
+  if (isRec(ctx.action.resultDialog)) return;
+  const rawDialog = asRecord(isRec(ctx.rawAction) ? ctx.rawAction.resultDialog : undefined);
+
+  for (const leaf of RESULT_DIALOG_LEAVES) {
+    if (rawDialog[leaf] === undefined) continue;
+    findings.push({
+      severity: TRANSLATION_TARGET_UNKNOWN_SEVERITY,
+      rule: TRANSLATION_TARGET_UNKNOWN,
+      where: `${ctx.where} · result dialog "${leaf}"`,
+      path: `${ctx.path}.resultDialog.${leaf}`,
+      message:
+        `Translations carry a result dialog \`${leaf}\`, but ${ctx.subject} declares no ` +
+        `\`resultDialog\`, so nothing reads this copy: a bundle translates a dialog the ` +
+        `action declares and cannot add one.`,
+      hint:
+        `Move the \`resultDialog\` translations under the action that declares the dialog, ` +
+        `declare the \`resultDialog\` on this action first if it should show one, or drop them.`,
+    });
+  }
+}
+
 /**
  * `resultDialog.fields.<path>` — keyed by the LITERAL `path` of a field the
  * action's `resultDialog.fields[]` declares (dots included: `"client.secret"`