diff --git a/.changeset/9673-pageview-drop-context-spread.md b/.changeset/9673-pageview-drop-context-spread.md
new file mode 100644
index 0000000000..b706192515
--- /dev/null
+++ b/.changeset/9673-pageview-drop-context-spread.md
@@ -0,0 +1,13 @@
+---
+'@object-ui/app-shell': patch
+---
+
+fix(app-shell): `PageView` builds the page node's `context`, it no longer reads one off the page
+
+`PageView` spread `(page as any).context` into the `context` it hands `SchemaRenderer`.
+`PageSchema` refuses a page-level `context` key, so on every page that parses the
+spread added nothing, and the code read as an author channel that no author could use.
+The node's `context` is now exactly `{ params, refreshKey }`, built from the route and
+the refresh counter, and the `as any` cast at that spot is gone. A stored document
+that carries `context` without passing `PageSchema` no longer passes it through.
+`context` stays undeclared on `PageSchema` (objectui#9673).
diff --git a/packages/app-shell/src/views/PageView.tsx b/packages/app-shell/src/views/PageView.tsx
index 2a8eb31007..9de300582c 100644
--- a/packages/app-shell/src/views/PageView.tsx
+++ b/packages/app-shell/src/views/PageView.tsx
@@ -151,7 +151,11 @@ export function PageView() {
                 // turns it red. Both directions were measured on objectui#9718.
                 type: (page as any).type || 'page',
                 pageType: (page as any).type,
-                context: { ...(page as any).context, params, refreshKey },
+                // `context` is built here, never read off the page: `PageSchema`
+                // refuses a page-level `context` key, so no parsed page can
+                // carry one (objectui#9673). Written after `...page`, it also
+                // overrides whatever an unparsed document smuggled in.
+                context: { params, refreshKey },
               }}
             />
           )}
diff --git a/packages/app-shell/src/views/__tests__/PageView.context-9673.test.tsx b/packages/app-shell/src/views/__tests__/PageView.context-9673.test.tsx
new file mode 100644
index 0000000000..a94afacc17
--- /dev/null
+++ b/packages/app-shell/src/views/__tests__/PageView.context-9673.test.tsx
@@ -0,0 +1,126 @@
+/**
+ * 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.
+ */
+
+/**
+ * objectui#9673 — the `context` PageView hands `SchemaRenderer` is BUILT, not read.
+ *
+ * `PageSchema` refuses a page-level `context` key, so a stored page that parses
+ * never carries one. PageView used to spread `(page as any).context` into the
+ * node anyway: a no-op on every parsed page, and a channel that read as
+ * author-supplied page context that no author could supply. Ruled "remove"
+ * (comment 5811058824): the node's `context` is exactly `{ params, refreshKey }`.
+ *
+ * The second case is the discriminating one: a document that never passed
+ * `PageSchema` and sneaks `context` in through a cast must not leak it into the
+ * node. With the spread restored, that case goes red.
+ */
+
+import { describe, it, expect, vi } from 'vitest';
+import { render, cleanup } from '@testing-library/react';
+import React from 'react';
+import { PageSchema } from '@objectstack/spec/ui';
+
+// Lowercase snake_case: PageSchema refuses any other `name`, and the control
+// below needs a page that parses.
+const PAGE_NAME = 'the_page';
+
+/** Query string the next `render()` sees; PageView turns it into `params`. */
+let search = '';
+
+vi.mock('react-router-dom', () => ({
+  useParams: () => ({ pageName: PAGE_NAME }),
+  useSearchParams: () => [new URLSearchParams(search), vi.fn()],
+  useNavigate: () => vi.fn(),
+  useLocation: () => ({ pathname: `/apps/cloud/page/${PAGE_NAME}`, search: search ? `?${search}` : '' }),
+}));
+
+vi.mock('@object-ui/auth', async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  useAuth: () => ({
+    user: { id: 'u1', name: 'User', role: 'user', image: null },
+    activeOrganization: null,
+  }),
+  useWorkspaceAdminStatus: () => ({ isAdmin: false, isResolved: true }),
+  createAuthenticatedFetch: () => vi.fn(),
+}));
+
+vi.mock('@object-ui/i18n', async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  useObjectTranslation: () => ({ t: (k: string, o?: any) => o?.defaultValue ?? o?.name ?? k }),
+}));
+
+/** The stored page document the next `render()` will resolve. */
+let storedPage: Record<string, unknown> | undefined;
+
+vi.mock('../../providers/MetadataProvider', () => ({
+  useMetadata: () => ({ pages: storedPage ? [storedPage] : [], objects: [] }),
+}));
+
+vi.mock('../MetadataInspector', () => ({
+  MetadataPanel: () => null,
+  useMetadataInspector: () => ({ showDebug: false }),
+}));
+
+/** Every schema node handed to `SchemaRenderer` since the last render. */
+const written: Record<string, any>[] = [];
+
+vi.mock('@object-ui/react', async (orig) => {
+  const actual = await (orig as any)();
+  return {
+    ...actual,
+    useAdapter: () => ({}),
+    SchemaRenderer: ({ schema }: { schema: Record<string, any> }) => {
+      written.push(schema);
+      return null;
+    },
+  };
+});
+
+import { PageView } from '../PageView';
+
+/** Mount `PageView` over one stored document and return the node it wrote. */
+function writeFor(doc: Record<string, unknown>, query: string): Record<string, any> | undefined {
+  cleanup();
+  written.length = 0;
+  search = query;
+  storedPage = doc;
+  render(<PageView />);
+  return written[0];
+}
+
+const PARSED_PAGE = { name: PAGE_NAME, label: 'A Page', type: 'app' };
+
+describe('objectui#9673 — PageView builds the node context, it never reads one off the page', () => {
+  it('hands SchemaRenderer a context of exactly { params, refreshKey } for a page that parses', () => {
+    // Control: the fixture is a page PageSchema accepts, so this is the case
+    // every real author is in.
+    expect(PageSchema.safeParse(PARSED_PAGE).success).toBe(true);
+
+    const schema = writeFor(PARSED_PAGE, 'account=42&tab=notes');
+
+    // Firing control: absence means the harness stopped reaching SchemaRenderer.
+    expect(schema, 'PageView rendered no schema at all; this probe measured nothing').toBeDefined();
+    expect(schema!.context).toEqual({ params: { account: '42', tab: 'notes' }, refreshKey: 0 });
+  });
+
+  it('a document that sneaks `context` in past PageSchema does not leak it into the node', () => {
+    const smuggled = { ...PARSED_PAGE, context: { leaked: 'author-value', params: { account: 'forged' } } };
+
+    // Why no author can reach this: PageSchema refuses the key outright.
+    expect(PageSchema.safeParse(smuggled).success).toBe(false);
+
+    const schema = writeFor(smuggled as Record<string, unknown>, 'account=42');
+
+    expect(schema, 'PageView rendered no schema at all; this probe measured nothing').toBeDefined();
+    expect(
+      schema!.context,
+      'the node context must be built from the route alone; a `context` key on the stored page ' +
+        'is one PageSchema refuses and must not reach SchemaRenderer (objectui#9673).',
+    ).toEqual({ params: { account: '42' }, refreshKey: 0 });
+  });
+});