diff --git a/.changeset/attachments-beside-discussion-and-i18n.md b/.changeset/attachments-beside-discussion-and-i18n.md
new file mode 100644
index 0000000000..78ef4f1898
--- /dev/null
+++ b/.changeset/attachments-beside-discussion-and-i18n.md
@@ -0,0 +1,35 @@
+---
+"@object-ui/app-shell": patch
+"@object-ui/plugin-detail": patch
+"@object-ui/components": patch
+"@object-ui/i18n": patch
+---
+
+fix(detail): record Attachments become their own tab (with count badge) and their copy is translated — objectstack#4358
+
+Two defects on `enable.files: true` record detail pages:
+
+1. **Buried placement.** `RecordDetailView` appended `RecordAttachmentsPanel`
+   AFTER the schema-rendered page tree, whose synthesized default embeds
+   `record:discussion` as the last main component — so the panel always
+   landed below an ever-growing feed timeline, undiscoverable without
+   scrolling to the very bottom, with no metadata knob to move it.
+
+   `buildDefaultTabs` now emits a peer **Attachments** tab (a new
+   `record:attachments` node rendered by an app-shell registration wrapping
+   the existing panel via RecordContext) between Related and
+   Activity/History. `PageTabsRenderer` derives the tab's count badge from a
+   `sys_attachment` probe scoped to `(parent_object, parent_id)`, riding the
+   same RelatedCountStore cache/invalidation bus as related-list badges — so
+   uploads and deletes update the badge live. A `hideAttachments` synthesizer
+   option suppresses the tab; RecordDetailView keeps its legacy bottom append
+   only as the fallback for authored pages without the node
+   (`hasExplicitAttachments`).
+
+2. **Untranslated copy.** The panel's eleven `detail.*` keys (`attachments`,
+   `uploadAttachment`, `loadingAttachments`, `noAttachments`,
+   `downloadAttachment`, `deleteAttachment`, and the five
+   `attachment*Denied/Required` friendly errors) existed only as inline
+   English `defaultValue`s — no locale bundle carried them, so non-English
+   consoles always showed English. All ten locales now define them; the tab
+   label rides the existing well-known-label dictionary (→ 附件 etc.).
diff --git a/content/docs/guide/slotted-pages.md b/content/docs/guide/slotted-pages.md
index 918bee0516..04e65b78d1 100644
--- a/content/docs/guide/slotted-pages.md
+++ b/content/docs/guide/slotted-pages.md
@@ -33,6 +33,11 @@ slotted pages are the right tool.
 | `tabs` | The entire `page:tabs` node — use to add or reorder tabs (wins over `details`) |
 | `discussion` | `record:discussion` (the inline conversation footer) |
 
+Objects with `enable.files: true` also get a synthesized **Attachments** tab
+(`record:attachments`, with a count badge) beside Details/Related. It is not a
+slot of its own — override `tabs` to reshape it, or pass
+`hideAttachments: true` to the synthesizer to drop it.
+
 Each slot accepts a single component schema or an array (arrays are
 flattened in place). Each slot is a **full replacement at the slot
 boundary** — there is no deep-merge or JSON-Patch in v1.
diff --git a/packages/app-shell/src/index.ts b/packages/app-shell/src/index.ts
index 4c0ec8f9a7..e3f4ca5b22 100644
--- a/packages/app-shell/src/index.ts
+++ b/packages/app-shell/src/index.ts
@@ -235,6 +235,9 @@ import './console/home/CloudOnboardingNext';
 // SDUI widget: read-only admin diagnostic for the env's effective AI model
 // (cloud#797) — fetches GET /api/v1/ai/effective-model.
 import './console/diagnostics/CloudAiModelStatus';
+// `record:attachments` — schema-addressable Attachments panel referenced by
+// synthesized record pages when `enable.files: true` (objectstack#4358).
+import './views/record-attachments-renderer';
 
 // Phase 3c — generic metadata admin engine. Re-exported so plugins
 // can call `registerMetadataResource()` to override the per-type
diff --git a/packages/app-shell/src/utils/__tests__/pageSchemaIntrospect.test.ts b/packages/app-shell/src/utils/__tests__/pageSchemaIntrospect.test.ts
index 7e821c7031..8cc60c1ea8 100644
--- a/packages/app-shell/src/utils/__tests__/pageSchemaIntrospect.test.ts
+++ b/packages/app-shell/src/utils/__tests__/pageSchemaIntrospect.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { hasExplicitDiscussion } from '../pageSchemaIntrospect';
+import { hasExplicitDiscussion, hasExplicitAttachments } from '../pageSchemaIntrospect';
 
 describe('hasExplicitDiscussion', () => {
   it('returns false for nullish and primitive inputs', () => {
@@ -115,3 +115,56 @@ describe('hasExplicitDiscussion', () => {
     expect(hasExplicitDiscussion(a)).toBe(false);
   });
 });
+
+// objectstack#4358 — the synthesized default page now places
+// `record:attachments` beside the discussion feed; RecordDetailView uses this
+// walker to skip its legacy bottom-of-page append.
+describe('hasExplicitAttachments', () => {
+  it('returns false for nullish and primitive inputs', () => {
+    expect(hasExplicitAttachments(null)).toBe(false);
+    expect(hasExplicitAttachments(undefined)).toBe(false);
+    expect(hasExplicitAttachments('record:attachments')).toBe(false);
+  });
+
+  it('detects record:attachments at the root and nested in children', () => {
+    expect(hasExplicitAttachments({ type: 'record:attachments' })).toBe(true);
+    expect(
+      hasExplicitAttachments({
+        type: 'grid',
+        children: [{ type: 'record:attachments' }, { type: 'record:discussion' }],
+      }),
+    ).toBe(true);
+  });
+
+  it('detects attachments inside the synthesized Attachments tab (regions[].components[].items[])', () => {
+    // Mirrors buildDefaultPageSchema output for an enable.files object.
+    const synthPage = {
+      type: 'record',
+      regions: [
+        {
+          name: 'main',
+          components: [
+            { type: 'page:header' },
+            {
+              type: 'page:tabs',
+              items: [
+                { label: 'Details', value: 'details', children: [{ type: 'record:details' }] },
+                { label: 'Attachments', value: 'attachments', children: [{ type: 'record:attachments' }] },
+              ],
+            },
+            { type: 'record:discussion' },
+          ],
+        },
+      ],
+    };
+    expect(hasExplicitAttachments(synthPage)).toBe(true);
+  });
+
+  it('returns false when no attachments node exists (discussion alone)', () => {
+    expect(
+      hasExplicitAttachments({
+        regions: [{ components: [{ type: 'record:discussion' }] }],
+      }),
+    ).toBe(false);
+  });
+});
diff --git a/packages/app-shell/src/utils/pageSchemaIntrospect.ts b/packages/app-shell/src/utils/pageSchemaIntrospect.ts
index d676f42e6f..c4c0383b27 100644
--- a/packages/app-shell/src/utils/pageSchemaIntrospect.ts
+++ b/packages/app-shell/src/utils/pageSchemaIntrospect.ts
@@ -8,10 +8,11 @@
  */
 
 const DISCUSSION_TYPES = new Set(['record:discussion', 'record:chatter']);
+const ATTACHMENT_TYPES = new Set(['record:attachments']);
 
 /**
- * Walks a page schema tree and returns true if any node has a
- * `type` of `record:discussion` or `record:chatter`.
+ * Walks a page schema tree and returns true if any node's `type` is in
+ * `types`.
  *
  * Recurses into:
  *  - `children`, `items`, `body`, `components`
@@ -20,7 +21,7 @@ const DISCUSSION_TYPES = new Set(['record:discussion', 'record:chatter']);
  *
  * Cycles are guarded with a WeakSet.
  */
-export function hasExplicitDiscussion(root: unknown): boolean {
+function hasNodeOfType(root: unknown, types: ReadonlySet<string>): boolean {
   const seen = new WeakSet<object>();
   const walk = (node: any): boolean => {
     if (!node || typeof node !== 'object') return false;
@@ -28,7 +29,7 @@ export function hasExplicitDiscussion(root: unknown): boolean {
     seen.add(node);
     if (Array.isArray(node)) return node.some(walk);
     const t = node?.type;
-    if (typeof t === 'string' && DISCUSSION_TYPES.has(t)) return true;
+    if (typeof t === 'string' && types.has(t)) return true;
     const candidates: any[] = [
       node.children,
       node.items,
@@ -47,3 +48,21 @@ export function hasExplicitDiscussion(root: unknown): boolean {
   };
   return walk(root);
 }
+
+/**
+ * True when the page schema already places a `record:discussion` /
+ * `record:chatter` node — the host must then skip its bottom auto-append.
+ */
+export function hasExplicitDiscussion(root: unknown): boolean {
+  return hasNodeOfType(root, DISCUSSION_TYPES);
+}
+
+/**
+ * True when the page schema already places a `record:attachments` node —
+ * the synthesized default does whenever the object declares
+ * `enable.files: true` (objectstack#4358). The host must then skip its
+ * legacy bottom-of-page attachments append.
+ */
+export function hasExplicitAttachments(root: unknown): boolean {
+  return hasNodeOfType(root, ATTACHMENT_TYPES);
+}
diff --git a/packages/app-shell/src/views/RecordDetailView.tsx b/packages/app-shell/src/views/RecordDetailView.tsx
index 37d0b49d50..8de5c551b8 100644
--- a/packages/app-shell/src/views/RecordDetailView.tsx
+++ b/packages/app-shell/src/views/RecordDetailView.tsx
@@ -24,7 +24,7 @@ import { SkeletonDetail } from '../skeletons';
 import { ManagedByBadge } from '../components/ManagedByBadge';
 import { resolveCrudAffordances } from '../utils/crudAffordances';
 import { deriveRelatedLists } from '../utils/deriveRelatedLists';
-import { hasExplicitDiscussion } from '../utils/pageSchemaIntrospect';
+import { hasExplicitDiscussion, hasExplicitAttachments } from '../utils/pageSchemaIntrospect';
 import { ActionConfirmDialog, type ConfirmDialogState } from './ActionConfirmDialog';
 import { ActionParamDialog, type ParamDialogState } from './ActionParamDialog';
 import { ActionResultDialog, type ResultDialogState } from './ActionResultDialog';
@@ -1873,6 +1873,10 @@ export function RecordDetailView({ dataSource, objects, onEdit, objectNameOverri
   // `enable.feeds: false` (#2707) suppresses the discussion panel outright —
   // same opt-out contract the server enforces on sys_comment creation.
   const showAutoDiscussion = !disableDiscussion && !hasDiscussion && feedsEnabled;
+  // Synthesized pages place `record:attachments` beside the discussion feed
+  // (objectstack#4358); the legacy bottom-of-page append below stays only as
+  // the fallback for authored pages that don't slot the panel themselves.
+  const hasAttachments = hasExplicitAttachments(effectivePage as any);
 
   // System actions (Edit / Share / Delete) — synthesized for every record
   // page so objects without authored record_header actions still surface
@@ -2106,8 +2110,12 @@ export function RecordDetailView({ dataSource, objects, onEdit, objectNameOverri
               )}
               {/* Generic Attachments panel (#2727) — opt-in via
                   `enable.files: true`; the server rejects attachments
-                  targeting any other object (403 FILES_DISABLED). */}
-              {filesEnabled && pureRecordId && (
+                  targeting any other object (403 FILES_DISABLED).
+                  Fallback only: synthesized pages already place a
+                  `record:attachments` node beside the discussion feed
+                  (objectstack#4358), so this bottom append fires only for
+                  authored pages that omit the panel. */}
+              {filesEnabled && !hasAttachments && pureRecordId && (
                 <div className="mt-6">
                   <RecordAttachmentsPanel
                     objectName={objectName!}
diff --git a/packages/app-shell/src/views/record-attachments-renderer.tsx b/packages/app-shell/src/views/record-attachments-renderer.tsx
new file mode 100644
index 0000000000..f52d7dc288
--- /dev/null
+++ b/packages/app-shell/src/views/record-attachments-renderer.tsx
@@ -0,0 +1,78 @@
+/**
+ * ObjectUI
+ * Copyright (c) 2024-present ObjectStack Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * `record:attachments` — schema-addressable wrapper around
+ * `RecordAttachmentsPanel`, mirroring how `record:discussion` wraps
+ * `RecordChatterPanel` (plugin-detail/renderers/record-chatter.tsx).
+ *
+ * Registered here (app-shell) rather than in plugin-detail because the panel
+ * depends on `@object-ui/providers` (presigned upload adapter) and
+ * `@object-ui/auth` (Bearer fetch), which plugin-detail deliberately does not
+ * pull in. The side-effect registration is imported from the app-shell barrel
+ * (`src/index.ts`), so any host that mounts the shell — the console runtime
+ * AND Studio's PagePreview — resolves the type before a synthesized page
+ * references it (objectstack#4358).
+ *
+ * Renders nothing without a record identity (e.g. a page composed outside a
+ * RecordContext). A missing dataSource is tolerated: the panel just shows its
+ * empty state — that is what Studio's PagePreview binds.
+ */
+
+import * as React from 'react';
+import { ComponentRegistry } from '@object-ui/core';
+import { useRecordContext } from '@object-ui/react';
+import { useAuth } from '@object-ui/auth';
+import { RecordAttachmentsPanel } from './RecordAttachmentsPanel';
+
+const splitDesigner = (props: Record<string, any>) => {
+  const { 'data-obj-id': id, 'data-obj-type': type, style, ...rest } = props || {};
+  return { designer: { 'data-obj-id': id, 'data-obj-type': type, style }, rest };
+};
+
+export interface RecordAttachmentsRendererProps {
+  schema?: Record<string, any>;
+  className?: string;
+  [k: string]: any;
+}
+
+export const RecordAttachmentsRenderer: React.FC<RecordAttachmentsRendererProps> = ({
+  schema: _schema,
+  className,
+  ...props
+}) => {
+  const ctx = useRecordContext();
+  const { user } = useAuth();
+  const { designer } = splitDesigner(props);
+
+  const objectName = ctx?.objectName;
+  const recordId = ctx?.recordId != null ? String(ctx.recordId) : '';
+  if (!objectName || !recordId) return null;
+
+  return (
+    <div className={className} {...designer}>
+      <RecordAttachmentsPanel
+        objectName={objectName}
+        recordId={recordId}
+        dataSource={ctx?.dataSource as any}
+        currentUserId={user?.id}
+      />
+    </div>
+  );
+};
+
+ComponentRegistry.register('attachments', RecordAttachmentsRenderer, {
+  namespace: 'record',
+  skipFallback: true,
+  category: 'record',
+  label: 'Attachments',
+  icon: 'Paperclip',
+  inputs: [{ name: 'className', type: 'string', label: 'CSS Class' }],
+});
+
+export default RecordAttachmentsRenderer;
diff --git a/packages/components/src/renderers/layout/containers.tsx b/packages/components/src/renderers/layout/containers.tsx
index b1c033b5b9..561668c2fe 100644
--- a/packages/components/src/renderers/layout/containers.tsx
+++ b/packages/components/src/renderers/layout/containers.tsx
@@ -308,6 +308,27 @@ const collectRelatedLists = (nodes: any, acc: any[] = []): any[] => {
   return acc;
 };
 
+/**
+ * Walk a tab's children (depth-first) and return true when a
+ * `record:attachments` node is present. The Attachments tab
+ * (objectstack#4358) derives its badge from a `sys_attachment` count scoped
+ * by `(parent_object, parent_id)` — a two-key filter the related-list probe
+ * shape can't express, so it gets its own detection + probe path below.
+ */
+const containsAttachmentsNode = (nodes: any): boolean => {
+  if (!nodes) return false;
+  const list = Array.isArray(nodes) ? nodes : [nodes];
+  for (const n of list) {
+    if (!n || typeof n !== 'object') continue;
+    if (n.type === 'record:attachments') return true;
+    const candidates = [n.children, n.properties?.children, n.properties?.items, n.body, n.items];
+    for (const c of candidates) {
+      if (c && containsAttachmentsNode(c)) return true;
+    }
+  }
+  return false;
+};
+
 const PageTabsRenderer: React.FC<any> = ({ schema, className, ...props }) => {
   const { designer } = splitDesignerProps(props);
   const { language } = useObjectTranslation();
@@ -377,12 +398,13 @@ const PageTabsRenderer: React.FC<any> = ({ schema, className, ...props }) => {
   // Snapshot which tabs (index → derived (objectName, relationshipField))
   // need a count probe. Cached per items reference so we don't re-walk on
   // every render.
+  const recordObject: string | undefined = ctx?.objectName;
   const probeTargets = React.useMemo(() => {
-    const out = new Map<number, Array<{ objectName: string; relationshipField?: string }>>();
+    const out = new Map<number, Array<{ objectName: string; relationshipField?: string; attachments?: boolean }>>();
     items.forEach((it, idx) => {
       if (it.count !== undefined && it.count !== null && it.count !== '') return;
       const lists = collectRelatedLists((it as any).children);
-      const probes: Array<{ objectName: string; relationshipField?: string }> = [];
+      const probes: Array<{ objectName: string; relationshipField?: string; attachments?: boolean }> = [];
       for (const rl of lists) {
         const objectName: string | undefined = rl?.properties?.objectName || rl?.objectName;
         if (!objectName) continue;
@@ -390,10 +412,18 @@ const PageTabsRenderer: React.FC<any> = ({ schema, className, ...props }) => {
           rl?.properties?.relationshipField || rl?.relationshipField;
         probes.push({ objectName, relationshipField });
       }
+      // Attachments tab (objectstack#4358): count sys_attachment rows scoped
+      // to this record. The synthetic `relationshipField` below is only a
+      // cache-key discriminator — the actual filter is injected by the probe
+      // wrapper in the effect, since the store's single-key filter shape
+      // can't express `(parent_object, parent_id)`.
+      if (recordObject && containsAttachmentsNode((it as any).children)) {
+        probes.push({ objectName: 'sys_attachment', relationshipField: `attachments:${recordObject}`, attachments: true });
+      }
       if (probes.length > 0) out.set(idx, probes);
     });
     return out;
-  }, [items]);
+  }, [items, recordObject]);
 
   React.useEffect(() => {
     if (!ds || typeof ds.find !== 'function') return;
@@ -403,8 +433,19 @@ const PageTabsRenderer: React.FC<any> = ({ schema, className, ...props }) => {
       for (const probe of probes) {
         // RelatedCountStore.fetch is internally deduplicated, so concurrent
         // mounts of multiple tab strips don't generate redundant requests.
+        // The attachments probe overrides the store-built single-key filter
+        // with the two-key `(parent_object, parent_id)` scope; the synthetic
+        // relationshipField keeps the cache key unique, and the store's
+        // `sys_attachment` invalidation (data-change bus) still hits it.
+        const finder = probe.attachments
+          ? (object: string, query: any) =>
+              ds.find(object, {
+                ...query,
+                $filter: { parent_object: recordObject, parent_id: parentId },
+              })
+          : (object: string, query: any) => ds.find(object, query);
         void RelatedCountStore.fetch(
-          (object, query) => ds.find(object, query),
+          finder,
           probe.objectName,
           probe.relationshipField,
           parentId,
diff --git a/packages/i18n/src/locales/ar.ts b/packages/i18n/src/locales/ar.ts
index 6f9e7cfddd..de9aee3f34 100644
--- a/packages/i18n/src/locales/ar.ts
+++ b/packages/i18n/src/locales/ar.ts
@@ -759,6 +759,18 @@ const ar = {
     attachmentCount: "{{count}} مرفق",
     attachmentCountPlural: "{{count}} مرفقات",
     removeAttachment: "إزالة المرفق",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "المرفقات",
+    uploadAttachment: "رفع",
+    loadingAttachments: "جارٍ تحميل المرفقات…",
+    noAttachments: "لا توجد مرفقات بعد. ارفع ملفًا للبدء.",
+    downloadAttachment: "تنزيل",
+    deleteAttachment: "حذف المرفق",
+    attachmentDeleteDenied: "لا يمكن حذف هذا المرفق إلا لمن رفعه أو لمن يمكنه تعديل هذا السجل.",
+    attachmentParentAccessDenied: "ليس لديك صلاحية إرفاق ملفات بهذا السجل.",
+    attachmentDownloadDenied: "ليس لديك صلاحية تنزيل هذا المرفق.",
+    attachmentAuthRequired: "يرجى تسجيل الدخول لتنزيل هذا المرفق.",
+    attachmentPermissionDenied: "ليس لديك إذن للقيام بذلك.",
     unifiedDiff: "عرض موحد",
     sideBySideDiff: "عرض جنباً إلى جنب",
     noChanges: "لا توجد تغييرات",
diff --git a/packages/i18n/src/locales/de.ts b/packages/i18n/src/locales/de.ts
index 0ded657a49..96bf56b804 100644
--- a/packages/i18n/src/locales/de.ts
+++ b/packages/i18n/src/locales/de.ts
@@ -757,6 +757,18 @@ const de = {
     attachmentCount: "{{count}} Anhang",
     attachmentCountPlural: "{{count}} Anhänge",
     removeAttachment: "Anhang entfernen",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "Anhänge",
+    uploadAttachment: "Hochladen",
+    loadingAttachments: "Anhänge werden geladen…",
+    noAttachments: "Noch keine Anhänge. Laden Sie eine Datei hoch, um zu beginnen.",
+    downloadAttachment: "Herunterladen",
+    deleteAttachment: "Anhang löschen",
+    attachmentDeleteDenied: "Nur die hochladende Person oder jemand mit Bearbeitungsrecht für diesen Datensatz darf diesen Anhang löschen.",
+    attachmentParentAccessDenied: "Sie sind nicht berechtigt, Dateien an diesen Datensatz anzuhängen.",
+    attachmentDownloadDenied: "Sie sind nicht berechtigt, diesen Anhang herunterzuladen.",
+    attachmentAuthRequired: "Bitte melden Sie sich an, um diesen Anhang herunterzuladen.",
+    attachmentPermissionDenied: "Sie haben keine Berechtigung für diese Aktion.",
     unifiedDiff: "Einheitliche Ansicht",
     sideBySideDiff: "Nebeneinander-Ansicht",
     noChanges: "Keine Änderungen",
diff --git a/packages/i18n/src/locales/en.ts b/packages/i18n/src/locales/en.ts
index e3126b99c8..beb85d7a19 100644
--- a/packages/i18n/src/locales/en.ts
+++ b/packages/i18n/src/locales/en.ts
@@ -817,6 +817,18 @@ const en = {
     attachmentCount: '{{count}} attachment',
     attachmentCountPlural: '{{count}} attachments',
     removeAttachment: 'Remove attachment',
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: 'Attachments',
+    uploadAttachment: 'Upload',
+    loadingAttachments: 'Loading attachments…',
+    noAttachments: 'No attachments yet. Upload a file to get started.',
+    downloadAttachment: 'Download',
+    deleteAttachment: 'Delete attachment',
+    attachmentDeleteDenied: 'Only the uploader or someone who can edit this record may delete this attachment.',
+    attachmentParentAccessDenied: "You don't have access to attach files to this record.",
+    attachmentDownloadDenied: "You don't have access to download this attachment.",
+    attachmentAuthRequired: 'Please sign in to download this attachment.',
+    attachmentPermissionDenied: "You don't have permission to do that.",
     // Diff
     unifiedDiff: 'Unified diff',
     sideBySideDiff: 'Side-by-side diff',
diff --git a/packages/i18n/src/locales/es.ts b/packages/i18n/src/locales/es.ts
index a108cad4d0..320ec63c08 100644
--- a/packages/i18n/src/locales/es.ts
+++ b/packages/i18n/src/locales/es.ts
@@ -757,6 +757,18 @@ const es = {
     attachmentCount: "{{count}} archivo adjunto",
     attachmentCountPlural: "{{count}} archivos adjuntos",
     removeAttachment: "Eliminar adjunto",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "Adjuntos",
+    uploadAttachment: "Subir",
+    loadingAttachments: "Cargando adjuntos…",
+    noAttachments: "Aún no hay adjuntos. Suba un archivo para empezar.",
+    downloadAttachment: "Descargar",
+    deleteAttachment: "Eliminar adjunto",
+    attachmentDeleteDenied: "Solo quien lo subió o alguien que pueda editar este registro puede eliminar este adjunto.",
+    attachmentParentAccessDenied: "No tiene acceso para adjuntar archivos a este registro.",
+    attachmentDownloadDenied: "No tiene acceso para descargar este adjunto.",
+    attachmentAuthRequired: "Inicie sesión para descargar este adjunto.",
+    attachmentPermissionDenied: "No tiene permiso para hacer eso.",
     unifiedDiff: "Vista unificada",
     sideBySideDiff: "Vista lado a lado",
     noChanges: "Sin cambios",
diff --git a/packages/i18n/src/locales/fr.ts b/packages/i18n/src/locales/fr.ts
index 8450348fc0..4f54362899 100644
--- a/packages/i18n/src/locales/fr.ts
+++ b/packages/i18n/src/locales/fr.ts
@@ -759,6 +759,18 @@ const fr = {
     attachmentCount: "{{count}} pièce jointe",
     attachmentCountPlural: "{{count}} pièces jointes",
     removeAttachment: "Supprimer la pièce jointe",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "Pièces jointes",
+    uploadAttachment: "Téléverser",
+    loadingAttachments: "Chargement des pièces jointes…",
+    noAttachments: "Aucune pièce jointe pour le moment. Téléversez un fichier pour commencer.",
+    downloadAttachment: "Télécharger",
+    deleteAttachment: "Supprimer la pièce jointe",
+    attachmentDeleteDenied: "Seule la personne qui l'a téléversée ou une personne pouvant modifier cet enregistrement peut supprimer cette pièce jointe.",
+    attachmentParentAccessDenied: "Vous n'avez pas accès pour joindre des fichiers à cet enregistrement.",
+    attachmentDownloadDenied: "Vous n'avez pas accès pour télécharger cette pièce jointe.",
+    attachmentAuthRequired: "Veuillez vous connecter pour télécharger cette pièce jointe.",
+    attachmentPermissionDenied: "Vous n'avez pas la permission de faire cela.",
     unifiedDiff: "Vue unifiée",
     sideBySideDiff: "Vue côte à côte",
     noChanges: "Aucune modification",
diff --git a/packages/i18n/src/locales/ja.ts b/packages/i18n/src/locales/ja.ts
index ddae4e46e8..c6448fe944 100644
--- a/packages/i18n/src/locales/ja.ts
+++ b/packages/i18n/src/locales/ja.ts
@@ -768,6 +768,18 @@ const ja = {
     attachmentCount: "{{count}} 件の添付ファイル",
     attachmentCountPlural: "{{count}} 件の添付ファイル",
     removeAttachment: "添付ファイルを削除",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "添付ファイル",
+    uploadAttachment: "アップロード",
+    loadingAttachments: "添付ファイルを読み込み中…",
+    noAttachments: "添付ファイルはまだありません。ファイルをアップロードして始めましょう。",
+    downloadAttachment: "ダウンロード",
+    deleteAttachment: "添付ファイルを削除",
+    attachmentDeleteDenied: "この添付ファイルを削除できるのは、アップロードした本人またはこのレコードを編集できるユーザーのみです。",
+    attachmentParentAccessDenied: "このレコードにファイルを添付する権限がありません。",
+    attachmentDownloadDenied: "この添付ファイルをダウンロードする権限がありません。",
+    attachmentAuthRequired: "この添付ファイルをダウンロードするにはサインインしてください。",
+    attachmentPermissionDenied: "この操作を行う権限がありません。",
     unifiedDiff: "統合差分",
     sideBySideDiff: "横並び差分",
     noChanges: "変更なし",
diff --git a/packages/i18n/src/locales/ko.ts b/packages/i18n/src/locales/ko.ts
index ee3f7c4bac..e60a43ab6f 100644
--- a/packages/i18n/src/locales/ko.ts
+++ b/packages/i18n/src/locales/ko.ts
@@ -757,6 +757,18 @@ const ko = {
     attachmentCount: "첨부파일 {{count}}개",
     attachmentCountPlural: "첨부파일 {{count}}개",
     removeAttachment: "첨부파일 제거",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "첨부파일",
+    uploadAttachment: "업로드",
+    loadingAttachments: "첨부파일 불러오는 중…",
+    noAttachments: "아직 첨부파일이 없습니다. 파일을 업로드해 시작하세요.",
+    downloadAttachment: "다운로드",
+    deleteAttachment: "첨부파일 삭제",
+    attachmentDeleteDenied: "업로드한 사용자 또는 이 레코드를 편집할 수 있는 사용자만 이 첨부파일을 삭제할 수 있습니다.",
+    attachmentParentAccessDenied: "이 레코드에 파일을 첨부할 권한이 없습니다.",
+    attachmentDownloadDenied: "이 첨부파일을 다운로드할 권한이 없습니다.",
+    attachmentAuthRequired: "이 첨부파일을 다운로드하려면 로그인하세요.",
+    attachmentPermissionDenied: "이 작업을 수행할 권한이 없습니다.",
     unifiedDiff: "통합 보기",
     sideBySideDiff: "나란히 보기",
     noChanges: "변경 없음",
diff --git a/packages/i18n/src/locales/pt.ts b/packages/i18n/src/locales/pt.ts
index caebbbd623..e9f827d35a 100644
--- a/packages/i18n/src/locales/pt.ts
+++ b/packages/i18n/src/locales/pt.ts
@@ -759,6 +759,18 @@ const pt = {
     attachmentCount: "{{count}} anexo",
     attachmentCountPlural: "{{count}} anexos",
     removeAttachment: "Remover anexo",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "Anexos",
+    uploadAttachment: "Enviar",
+    loadingAttachments: "Carregando anexos…",
+    noAttachments: "Ainda não há anexos. Envie um arquivo para começar.",
+    downloadAttachment: "Baixar",
+    deleteAttachment: "Excluir anexo",
+    attachmentDeleteDenied: "Somente quem enviou ou alguém que pode editar este registro pode excluir este anexo.",
+    attachmentParentAccessDenied: "Você não tem acesso para anexar arquivos a este registro.",
+    attachmentDownloadDenied: "Você não tem acesso para baixar este anexo.",
+    attachmentAuthRequired: "Faça login para baixar este anexo.",
+    attachmentPermissionDenied: "Você não tem permissão para fazer isso.",
     unifiedDiff: "Visualização unificada",
     sideBySideDiff: "Visualização lado a lado",
     noChanges: "Sem alterações",
diff --git a/packages/i18n/src/locales/ru.ts b/packages/i18n/src/locales/ru.ts
index d39370bb8a..c508a0caee 100644
--- a/packages/i18n/src/locales/ru.ts
+++ b/packages/i18n/src/locales/ru.ts
@@ -770,6 +770,18 @@ const ru = {
     attachmentCount: "{{count}} вложение",
     attachmentCountPlural: "{{count}} вложений",
     removeAttachment: "Удалить вложение",
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: "Вложения",
+    uploadAttachment: "Загрузить",
+    loadingAttachments: "Загрузка вложений…",
+    noAttachments: "Вложений пока нет. Загрузите файл, чтобы начать.",
+    downloadAttachment: "Скачать",
+    deleteAttachment: "Удалить вложение",
+    attachmentDeleteDenied: "Удалить это вложение может только загрузивший его пользователь или тот, кто может редактировать эту запись.",
+    attachmentParentAccessDenied: "У вас нет доступа для прикрепления файлов к этой записи.",
+    attachmentDownloadDenied: "У вас нет доступа для скачивания этого вложения.",
+    attachmentAuthRequired: "Войдите в систему, чтобы скачать это вложение.",
+    attachmentPermissionDenied: "У вас нет разрешения на это действие.",
     unifiedDiff: "Единое представление",
     sideBySideDiff: "Параллельное представление",
     noChanges: "Нет изменений",
diff --git a/packages/i18n/src/locales/zh.ts b/packages/i18n/src/locales/zh.ts
index 45df89a752..363a8a032b 100644
--- a/packages/i18n/src/locales/zh.ts
+++ b/packages/i18n/src/locales/zh.ts
@@ -829,6 +829,18 @@ const zh = {
     attachmentCount: '{{count}} 个附件',
     attachmentCountPlural: '{{count}} 个附件',
     removeAttachment: '移除附件',
+    // Record Attachments panel (enable.files, objectstack#4358)
+    attachments: '附件',
+    uploadAttachment: '上传',
+    loadingAttachments: '正在加载附件…',
+    noAttachments: '暂无附件。上传一个文件开始吧。',
+    downloadAttachment: '下载',
+    deleteAttachment: '删除附件',
+    attachmentDeleteDenied: '只有上传者或可编辑此记录的用户才能删除此附件。',
+    attachmentParentAccessDenied: '您无权为此记录添加附件。',
+    attachmentDownloadDenied: '您无权下载此附件。',
+    attachmentAuthRequired: '请登录后再下载此附件。',
+    attachmentPermissionDenied: '您没有执行此操作的权限。',
     // Diff
     unifiedDiff: '统一视图',
     sideBySideDiff: '并排视图',
diff --git a/packages/plugin-detail/src/synth/__tests__/buildDefaultPageSchema.test.ts b/packages/plugin-detail/src/synth/__tests__/buildDefaultPageSchema.test.ts
index 9394f956bc..8135bd7983 100644
--- a/packages/plugin-detail/src/synth/__tests__/buildDefaultPageSchema.test.ts
+++ b/packages/plugin-detail/src/synth/__tests__/buildDefaultPageSchema.test.ts
@@ -14,6 +14,7 @@ import {
   buildDefaultHighlights,
   buildDefaultTabs,
   buildDefaultDiscussion,
+  buildDefaultAttachments,
   detectStatusField,
   deriveStages,
   deriveHighlightFields,
@@ -721,6 +722,64 @@ describe('buildDefaultPageSchema', () => {
     it('buildDefaultDiscussion returns the record:discussion node', () => {
       expect(buildDefaultDiscussion()).toEqual({ type: 'record:discussion' });
     });
+
+    it('buildDefaultAttachments returns the record:attachments node', () => {
+      expect(buildDefaultAttachments()).toEqual({ type: 'record:attachments' });
+    });
+  });
+
+  // objectstack#4358 — `enable.files` objects get a peer Attachments tab
+  // (with a count badge derived by PageTabsRenderer) instead of the legacy
+  // below-the-feed append that a growing timeline buried.
+  describe('attachments tab (enable.files, objectstack#4358)', () => {
+    const filesDef: ObjectDefLike = { ...leadDef, enable: { files: true } };
+
+    it('no enable.files → no record:attachments anywhere', () => {
+      const page = buildDefaultPageSchema(leadDef);
+      expect(JSON.stringify(page)).not.toContain('record:attachments');
+    });
+
+    it('enable.files → tabs carry an Attachments tab wrapping record:attachments', () => {
+      const page = buildDefaultPageSchema(filesDef);
+      const tabs = page.regions[0].components.find((c: any) => c.type === 'page:tabs');
+      const tab = tabs.items.find((t: any) => t.value === 'attachments');
+      expect(tab).toBeDefined();
+      expect(tab.label).toBe('Attachments');
+      expect(tab.children).toEqual([{ type: 'record:attachments' }]);
+      // The discussion footer is untouched — attachments are a tab, not a
+      // footer widget.
+      const components = page.regions[0].components;
+      expect(components[components.length - 1].type).toBe('record:discussion');
+    });
+
+    it('the Attachments tab sits after Related and before Activity/History', () => {
+      const tabs = buildDefaultTabs(filesDef, {
+        related: [{ objectName: 'task', relationshipField: 'lead_id' }],
+        showActivity: true,
+        history: { entries: [], loading: false },
+      });
+      expect(tabs.items.map((t: any) => t.value)).toEqual([
+        'details',
+        'related',
+        'attachments',
+        'activity',
+        'history',
+      ]);
+    });
+
+    it('hideAttachments suppresses the tab', () => {
+      const page = buildDefaultPageSchema(filesDef, { hideAttachments: true });
+      expect(JSON.stringify(page)).not.toContain('record:attachments');
+    });
+
+    it('a details slot override keeps the Attachments tab', () => {
+      const page = buildDefaultPageSchema(filesDef, {
+        slots: { details: { type: 'div', id: 'custom-details' } },
+      });
+      const tabs = page.regions[0].components.find((c: any) => c.type === 'page:tabs');
+      expect(tabs.items.some((t: any) => t.value === 'attachments')).toBe(true);
+      expect(tabs.items[0].children[0].id).toBe('custom-details');
+    });
   });
 });
 
diff --git a/packages/plugin-detail/src/synth/buildDefaultPageSchema.ts b/packages/plugin-detail/src/synth/buildDefaultPageSchema.ts
index 4f669a73a2..d6378bb390 100644
--- a/packages/plugin-detail/src/synth/buildDefaultPageSchema.ts
+++ b/packages/plugin-detail/src/synth/buildDefaultPageSchema.ts
@@ -62,6 +62,12 @@ export interface ObjectDefLike {
     /** @deprecated pre-ADR-0085 pair; honoured by the shared derivation. */
     collapsed?: boolean;
   }>;
+  /**
+   * Spec `enable` capability toggles. Only `files` is read here:
+   * `enable.files === true` (opt-in, #2727) makes the synthesizer emit an
+   * Attachments tab beside Details/Related (objectstack#4358).
+   */
+  enable?: { files?: boolean; [key: string]: any };
   // NOTE: the per-surface `detail` hints block was REMOVED from the spec by
   // ADR-0085 — presentation intent is declared via the top-level semantic
   // roles above (stageField / highlightFields / fieldGroups). Per-page
@@ -89,6 +95,8 @@ export interface BuildPageOptions {
   sections?: Array<{ title?: string; columns?: number; fields?: any[] }>;
   /** Suppress the auto-appended `record:discussion` slot. */
   hideDiscussion?: boolean;
+  /** Suppress the auto-emitted Attachments tab (`enable.files`, objectstack#4358). */
+  hideAttachments?: boolean;
   /** Suppress the auto-prepended `record:highlights` strip. */
   hideHighlights?: boolean;
   /** Suppress the auto-prepended `record:path` stepper. */
@@ -540,7 +548,7 @@ export function buildDefaultDetails(
 export function buildDefaultTabs(
   def: ObjectDefLike | undefined,
   options: Pick<BuildPageOptions,
-    'sections' | 'related' | 'showActivity' | 'history' | 'highlightFields' | 'statusField' | 'hideRelatedTab' | 'relatedLayout'
+    'sections' | 'related' | 'showActivity' | 'history' | 'highlightFields' | 'statusField' | 'hideRelatedTab' | 'relatedLayout' | 'hideAttachments'
   > = {},
 ): any {
   const statusField = options.statusField ?? detectStatusField(def);
@@ -593,6 +601,15 @@ export function buildDefaultTabs(
       }
     }
   }
+  // Attachments tab (objectstack#4358) — emitted for `enable.files: true`
+  // objects so the panel is a peer of Details/Related instead of a footer
+  // widget buried under the discussion feed. `PageTabsRenderer` derives the
+  // count badge from the `record:attachments` node the same way it counts
+  // `record:related_list` tabs. The English label goes through the tab
+  // strip's KNOWN_LABEL_DICT (→ 附件 etc.), matching its sibling tabs.
+  if (def?.enable?.files === true && !options.hideAttachments) {
+    items.push({ label: 'Attachments', value: 'attachments', children: [buildDefaultAttachments()] });
+  }
   if (options.showActivity) {
     items.push({ label: 'Activity', value: 'activity', children: [{ type: 'record:activity' }] });
   }
@@ -621,6 +638,15 @@ export function buildDefaultDiscussion(): any {
   return { type: 'record:discussion' };
 }
 
+/**
+ * Sub-builder: the `record:attachments` panel (#2727). Emitted only when the
+ * object opts in via `enable.files: true` — the same gate the server enforces
+ * on `sys_attachment` rows (403 FILES_DISABLED otherwise).
+ */
+export function buildDefaultAttachments(): any {
+  return { type: 'record:attachments' };
+}
+
 /**
  * Synthesize the canonical Page schema for an object's default detail
  * page.
@@ -629,6 +655,8 @@ export function buildDefaultDiscussion(): any {
  *   { type:'record', template:'full-width', regions:[ { name:'main',
  *     components: [page:header, record:highlights?, record:path?,
  *     page:tabs, record:discussion?] } ] }
+ *   For `enable.files: true` objects the tabs node carries a peer
+ *   Attachments tab (`record:attachments` — objectstack#4358).
  *
  * Notes:
  *   - The `record:details` tab content is registered separately and
@@ -723,6 +751,7 @@ export function buildDefaultPageSchema(
       statusField: options.statusField,
       hideRelatedTab,
       relatedLayout: options.relatedLayout,
+      hideAttachments: options.hideAttachments,
     });
     // Replace the first tab's children (Details) with the override.
     if (Array.isArray(tabsNode.items) && tabsNode.items.length > 0) {
@@ -739,10 +768,13 @@ export function buildDefaultPageSchema(
       statusField: options.statusField,
       hideRelatedTab,
       relatedLayout: options.relatedLayout,
+      hideAttachments: options.hideAttachments,
     }));
   }
 
-  // 5) Discussion footer.
+  // 5) Discussion footer. (Attachments are NOT part of this footer: for
+  //    `enable.files` objects buildDefaultTabs emits a peer Attachments tab
+  //    instead — objectstack#4358.)
   if ('discussion' in slots && slots.discussion !== undefined) {
     components.push(...toNodeArray(slots.discussion));
   } else if (!options.hideDiscussion) {