@@ -17,26 +17,33 @@ import { test, expect, type APIRequestContext } from '@playwright/test';
  * canvas, not in a "Layout" form section: the page form prunes `regions`
  * (`PAGE_FIELDS_OWNED_ELSEWHERE` in app-shell's `page-schema.ts`), so the
  * canvas's region controls are where the layout config renders.
+ *
+ * In the required `Live E2E UI` job's `test:e2e:live:ci` allowlist since
+ * objectstack#27554, under the promotion rule (3/3 consecutive green, plus a
+ * 5/5 run of the enlarged allowlist); the readings are on that card's PR.
  */
 const API = process.env.LIVE_API_URL || 'http://localhost:3000';
 const SHIPPED_PAGE = 'showcase_project_workspace';
 
-/** Author an editable copy of the shipped page; returns its name and how many regions it lays out. */
-async function authorEditablePage(request: APIRequestContext): Promise<{ name: string; regions: number }> {
+/** Author an editable copy of the shipped page; returns its name, how many regions it lays out and how many blocks its first region holds. */
+async function authorEditablePage(
+  request: APIRequestContext,
+): Promise<{ name: string; regions: number; firstRegionBlocks: number }> {
   const res = await request.get(`${API}/api/v1/meta/page/${SHIPPED_PAGE}`);
   expect(res.ok(), await res.text()).toBeTruthy();
   const shipped = (await res.json()).item as Record<string, unknown>;
   // Underscore keys are the server's provenance stamps, not page content.
   const body = Object.fromEntries(Object.entries(shipped).filter(([k]) => !k.startsWith('_')));
   const regions = Array.isArray(body.regions) ? body.regions.length : 0;
   expect(regions, 'the shipped page lays out regions to copy').toBeGreaterThan(0);
+  const firstRegionBlocks = ((body.regions as { components?: unknown[] }[])[0].components ?? []).length;
 
   const name = `e2e_studio_editor_${Date.now()}`;
   const put = await request.put(`${API}/api/v1/meta/page/${name}`, {
     data: { ...body, name, label: `E2E Studio Editor ${name.slice(-6)}` },
   });
   expect(put.ok(), await put.text()).toBeTruthy();
-  return { name, regions };
+  return { name, regions, firstRegionBlocks };
 }
 
 async function removePage(request: APIRequestContext, name: string) {
@@ -62,8 +69,8 @@ test('the page editor loads with its config sections', async ({ page, request })
   }
 });
 
-test('Add block opens a block-type picker with configurable block kinds', async ({ page, request }) => {
-  const { name } = await authorEditablePage(request);
+test('Add block opens a block-type picker with configurable block kinds, and the added block is stored', async ({ page, request }) => {
+  const { name, firstRegionBlocks } = await authorEditablePage(request);
   try {
     await page.goto(`/apps/showcase_app/metadata/page/${name}`);
     await expect(page.getByTestId('metadata-edit-page')).toBeVisible();
@@ -76,6 +83,21 @@ test('Add block opens a block-type picker with configurable block kinds', async
     await expect(dialog.getByRole('button', { name: /Card/i })).toBeVisible();
     await expect(dialog.getByRole('button', { name: /Section/i })).toBeVisible();
     await expect(dialog.getByRole('button', { name: /Record details/i })).toBeVisible();
+
+    // The save round trip, not only the canvas: picking a kind autosaves a
+    // draft, and the draft read back through /meta holds the new block at the
+    // end of the first region.
+    const saved = page.waitForResponse(
+      (r) => r.request().method() === 'PUT' && r.url().includes(`/api/v1/meta/page/${name}?mode=draft`),
+    );
+    await dialog.getByRole('button', { name: /Card/i }).first().click();
+    const save = await saved;
+    expect(save.ok(), await save.text()).toBeTruthy();
+    const stored = await request.get(`${API}/api/v1/meta/page/${name}?state=draft`);
+    expect(stored.ok(), await stored.text()).toBeTruthy();
+    const blocks = (await stored.json()).item.regions[0].components as { type?: string }[];
+    expect(blocks).toHaveLength(firstRegionBlocks + 1);
+    expect(blocks[firstRegionBlocks].type).toBe('page:card');
   } finally {
     await removePage(request, name);
   }
 
@@ -1,4 +1,4 @@
-import { test, expect, type Page } from '@playwright/test';
+import { test, expect, type APIRequestContext, type Page } from '@playwright/test';
 
 /**
  * Live e2e for the Studio OBJECT designer — a "dogfood" gate that drives the
@@ -12,7 +12,11 @@ import { test, expect, type Page } from '@playwright/test';
  *   F2 — per-keystroke identifier sanitisation (must TYPE, not fill)
  *   F1 — cross-component reactivity (create package → switcher refresh)
  *   F3 — label→api-name derivation on blur
- *   F4 — empty picklist row must not trip spec validation
+ *   F4 — empty picklist row must not trip spec validation, and is not stored
+ *
+ * In the required `Live E2E UI` job's `test:e2e:live:ci` allowlist since
+ * objectstack#27554, under the promotion rule (3/3 consecutive green, plus a
+ * 5/5 run of the enlarged allowlist); the readings are on that card's PR.
  */
 
 // The object designer is reached through the showcase's own app: a stock
@@ -21,6 +25,20 @@ import { test, expect, type Page } from '@playwright/test';
 // resolve under any served app.
 const PKG = 'com.example.showcase';
 const NEW_OBJ = `/apps/showcase_app/metadata/object/new?package=${PKG}`;
+const API = process.env.LIVE_API_URL || 'http://localhost:3000';
+
+/**
+ * A package the environment authors, for a test that SAVES: the showcase is
+ * provided by code, so a save into it is refused (`WRITABLE_PACKAGE_REQUIRED`).
+ */
+async function authorWritablePackage(request: APIRequestContext, stamp: number): Promise<string> {
+  const id = `com.e2e.designer${stamp}`;
+  const res = await request.post(`${API}/api/v1/packages`, {
+    data: { manifest: { id, name: `E2E Designer ${stamp}`, version: '0.1.0', type: 'app' } },
+  });
+  expect(res.ok(), await res.text()).toBeTruthy();
+  return id;
+}
 
 /** Add a field of the given palette type into the open object designer. */
 async function addField(page: Page, typeName: string) {
@@ -52,23 +70,46 @@ test('F3: a field API name derives from its label on blur', async ({ page }) =>
   await expect(page.getByTestId('field-apiname-input')).toHaveValue('asset_code');
 });
 
-test('F4: adding a picklist + an empty option row does not trip spec validation', async ({ page }) => {
-  await page.goto(NEW_OBJ);
-  await page.getByTestId('object-name-input').fill('asset');
-  await addField(page, 'Picklist');
-  // Give the picklist its option source first: a select with no options is a
-  // real spec error (it needs `options` or `picklist`), and its banner is not
-  // the one this test is about.
-  await page.getByPlaceholder('Label', { exact: true }).first().fill('Open');
-  await page.getByPlaceholder('value', { exact: true }).first().fill('open');
-  await page.getByRole('button', { name: /Add value/i }).click();
-  // Live spec validation is debounced, so settle before a NEGATIVE assertion:
-  // the empty option row must NOT surface the developer-oriented
-  // "System identifier must be at least 2 characters" spec error. (With the
-  // bug the row persists to def.options and this banner appears.)
-  await page.waitForTimeout(1200);
-  await expect(page.getByTestId('metadata-validation-banner')).toHaveCount(0);
-  await expect(page.getByText(/System identifier must be/i)).toHaveCount(0);
+test('F4: adding a picklist + an empty option row does not trip spec validation, and is not stored', async ({ page, request }) => {
+  const stamp = Date.now();
+  const pkgId = await authorWritablePackage(request, stamp);
+  const objName = `e2e_asset${stamp}`;
+  try {
+    await page.goto(`/apps/showcase_app/metadata/object/new?package=${pkgId}`);
+    await page.getByTestId('object-name-input').fill(objName);
+    await addField(page, 'Picklist');
+    // Give the picklist its option source first: a select with no options is a
+    // real spec error (it needs `options` or `picklist`), and its banner is not
+    // the one this test is about.
+    await page.getByPlaceholder('Label', { exact: true }).first().fill('Open');
+    await page.getByPlaceholder('value', { exact: true }).first().fill('open');
+    await page.getByRole('button', { name: /Add value/i }).click();
+    // Live spec validation is debounced, so settle before a NEGATIVE assertion:
+    // the empty option row must NOT surface the developer-oriented
+    // "System identifier must be at least 2 characters" spec error. (With the
+    // bug the row persists to def.options and this banner appears.)
+    await page.waitForTimeout(1200);
+    await expect(page.getByTestId('metadata-validation-banner')).toHaveCount(0);
+    await expect(page.getByText(/System identifier must be/i)).toHaveCount(0);
+
+    // The save round trip, not only the UI state: Save stores a draft, and the
+    // draft read back through /meta carries the one authored option and not
+    // the empty row.
+    const saved = page.waitForResponse(
+      (r) => r.request().method() === 'PUT' && r.url().includes(`/api/v1/meta/object/${objName}`),
+    );
+    await page.getByRole('button', { name: /^Save/ }).click();
+    const save = await saved;
+    expect(save.ok(), await save.text()).toBeTruthy();
+    const stored = await request.get(`${API}/api/v1/meta/object/${objName}?state=draft`);
+    expect(stored.ok(), await stored.text()).toBeTruthy();
+    const fields = Object.values((await stored.json()).item.fields as Record<string, { type?: string; options?: unknown }>);
+    const picklists = fields.filter((f) => f.type === 'select');
+    expect(picklists).toHaveLength(1);
+    expect(picklists[0].options).toEqual([{ value: 'open', label: 'Open' }]);
+  } finally {
+    await request.delete(`${API}/api/v1/packages/${pkgId}`);
+  }
 });
 
 test('F1: a newly created package appears in the switcher without a reload', async ({ page }) => {
 
@@ -111,8 +111,8 @@
     "test:e2e": "playwright test",
     "test:e2e:ui": "playwright test --ui",
     "test:e2e:live": "playwright test --config=playwright.live.config.ts",
-    "test:e2e:live:ci": "playwright test --config=playwright.live.config.ts screen-flow.spec.ts action-modal.spec.ts master-detail.spec.ts saved-view-filter.spec.ts",
-    "test:e2e:live:nightly": "playwright test --config=playwright.live.config.ts cascading-options.spec.ts declared-sharing-rules-reach-13091.spec.ts field-conditional-rules.spec.ts form-view-subforms.spec.ts grid-conditional-rules.spec.ts grid-file-upload.spec.ts grid-parent-rules.spec.ts inline-edit-polish-2572.spec.ts list-row-action-cel.spec.ts record-history-display.spec.ts required-when-submit.spec.ts studio-editor.spec.ts studio-object-designer.spec.ts summary-rollup.spec.ts user-filters.spec.ts",
+    "test:e2e:live:ci": "playwright test --config=playwright.live.config.ts screen-flow.spec.ts action-modal.spec.ts master-detail.spec.ts saved-view-filter.spec.ts studio-object-designer.spec.ts studio-editor.spec.ts",
+    "test:e2e:live:nightly": "playwright test --config=playwright.live.config.ts cascading-options.spec.ts declared-sharing-rules-reach-13091.spec.ts field-conditional-rules.spec.ts form-view-subforms.spec.ts grid-conditional-rules.spec.ts grid-file-upload.spec.ts grid-parent-rules.spec.ts inline-edit-polish-2572.spec.ts list-row-action-cel.spec.ts record-history-display.spec.ts required-when-submit.spec.ts summary-rollup.spec.ts user-filters.spec.ts",
     "test:e2e:import-harness": "playwright test --config=playwright.import-harness.config.ts",
     "test:e2e:import-console": "playwright test --config=playwright.import-console.config.ts"
   },