@@ -0,0 +1,17 @@
+---
+'@object-ui/app-shell': patch
+---
+
+fix(app-shell): a `type: 'api'` action declaring `opensInNewTab` + `newTabUrl` opens the tab and sends no request
+
+Clause-②: no
+Metadata-protocol: none
+
+The spec documents `newTabUrl` as the zero-roundtrip target of a new-tab action: on click the console pre-opens a tab and navigates it to `newTabUrl` (with `{recordId}` substituted), and no action request is sent. The console's server-action handler did this, but its `type: 'api'` handlers never read the pair. A `type: 'api'` action declaring both therefore opened no tab and POSTed to its `target` instead, from the record header, its more-menu and the list toolbar.
+
+What changes:
+
+- On the record page (header row and the more-menu) and on every surface the shared console runtime serves (the list toolbar and the console's root action provider), a `type: 'api'` action with `opensInNewTab: true` and a `newTabUrl` now takes that path: the record id resolves the way that surface resolves it, the pre-opened tab goes to `newTabUrl`, and nothing is sent to `target`. A list launch with several rows selected is refused before the tab opens, as for a `script` action.
+- A `type: 'api'` action without `newTabUrl` sends its request to `target` as before.
+
+What to do: nothing. An api action that declares the pair now does what it declares.
@@ -0,0 +1,183 @@
+/**
+ * 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.
+ */
+
+/**
+ * objectstack#26747 — the shared console action runtime (list pages, the
+ * list toolbar, the console root provider) honours `opensInNewTab` +
+ * `newTabUrl` on a `type: 'api'` action: the pre-opened tab goes to
+ * `newTabUrl` with the selected row's id substituted, and no request is sent.
+ *
+ * Driven through a real `ActionRunner` carrying the runtime's own context and
+ * registered handler set, exactly as `ActionProvider` wires them, and through
+ * the `apiHandler` the hook returns (what `ConsoleShell` registers).
+ *
+ * CONTROL: without `newTabUrl` the api action still sends its request to
+ * `target`. The fast path's row-count refusal is the server-action one: two
+ * selected rows refuse before any tab opens.
+ */
+
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+import { renderHook, act } from '@testing-library/react';
+
+vi.mock('react-router-dom', () => ({ useNavigate: () => vi.fn() }));
+
+const authFetchSpy = vi.fn();
+vi.mock('@object-ui/auth', async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  useAuth: () => ({ user: { id: 'u1', name: 'User', image: null }, activeOrganization: null }),
+  createAuthenticatedFetch: () => authFetchSpy,
+}));
+
+vi.mock('@object-ui/i18n', async (importOriginal) => ({
+  ...(await importOriginal<Record<string, unknown>>()),
+  useObjectLabel: () => ({
+    fieldLabel: (_o: any, _n: any, l: any) => l,
+    fieldOptionLabel: (_o: any, _f: any, _v: any, l: any) => l,
+    actionParamText: (_o: any, _a: any, _p: any, _attr: any, fallback: any) => fallback,
+    actionParamOptionLabel: (_o: any, _a: any, _p: any, _v: any, fallback: any) => fallback,
+    actionDescription: (_o: any, _a: any, fallback: any) => fallback,
+  }),
+  useObjectTranslation: () => ({
+    t: (key: string, options?: any) => String(options?.defaultValue ?? key),
+  }),
+}));
+
+vi.mock('../useActionModal', () => ({
+  useActionModal: () => ({
+    modalHandler: vi.fn(async () => ({ success: true })),
+    modalElement: null,
+    closeModal: () => {},
+    resolveModalTarget: vi.fn(async () => null),
+  }),
+}));
+
+vi.mock('../../views/ActionConfirmDialog', () => ({ ActionConfirmDialog: () => null }));
+vi.mock('../../views/ActionParamDialog', () => ({ ActionParamDialog: () => null }));
+vi.mock('../../views/ActionResultDialog', () => ({ ActionResultDialog: () => null }));
+vi.mock('../../views/FlowRunner', () => ({ FlowRunner: () => null }));
+
+vi.mock('sonner', () => {
+  const fn: any = vi.fn();
+  fn.error = vi.fn();
+  fn.success = vi.fn();
+  return { toast: fn };
+});
+
+import { ActionRunner } from '@object-ui/core';
+import { useConsoleActionRuntime } from '../useConsoleActionRuntime';
+
+const TARGET = '/api/v1/export/gapdata_item';
+const NEW_TAB_ACTION = {
+  name: 'export_tab',
+  label: 'Export',
+  type: 'api',
+  target: TARGET,
+  opensInNewTab: true,
+  newTabUrl: '/export/{recordId}',
+  locations: ['list_toolbar'],
+};
+
+function stubWindowOpen() {
+  const tab = {
+    document: { write: vi.fn(), close: vi.fn() },
+    location: { href: 'about:blank' },
+    close: vi.fn(),
+  };
+  const open = vi.spyOn(window, 'open').mockImplementation(() => tab as unknown as Window);
+  return { tab, open };
+}
+
+/** A real runner wired to the runtime the way `ActionProvider` wires it. */
+function runnerFor(selectedRecords: Array<Record<string, unknown>>) {
+  const { result } = renderHook(() =>
+    useConsoleActionRuntime({ dataSource: {}, objects: [], objectName: 'gapdata_item' }),
+  );
+  const props = result.current.actionProviderProps;
+  const runner = new ActionRunner({ ...props.context, selectedRecords } as any);
+  for (const [type, handler] of Object.entries(props.handlers ?? {})) {
+    runner.registerHandler(type, handler as any);
+  }
+  return { runner, runtime: result.current };
+}
+
+beforeEach(() => {
+  authFetchSpy.mockReset();
+  authFetchSpy.mockImplementation(async () =>
+    new Response(JSON.stringify({ success: true, data: {} }), {
+      status: 200,
+      headers: { 'content-type': 'application/json' },
+    }),
+  );
+  vi.stubGlobal('fetch', vi.fn(async () => new Response('{}', { status: 200 })));
+});
+
+afterEach(() => {
+  vi.unstubAllGlobals();
+  vi.restoreAllMocks();
+});
+
+describe('objectstack#26747 — console runtime: an api action with opensInNewTab + newTabUrl opens the tab and sends nothing', () => {
+  it('list toolbar, one row selected: the pre-opened tab goes to the interpolated newTabUrl, and no request is sent', async () => {
+    const { runner } = runnerFor([{ id: 'row 7' }]);
+    const { tab, open } = stubWindowOpen();
+
+    let result: any;
+    await act(async () => {
+      result = await runner.execute({ ...NEW_TAB_ACTION } as any);
+    });
+
+    expect(result.success).toBe(true);
+    expect(open).toHaveBeenCalledTimes(1);
+    expect(open).toHaveBeenCalledWith('about:blank', '_blank');
+    expect(tab.location.href).toBe(`${window.location.origin}/export/row%207`);
+    expect(authFetchSpy).not.toHaveBeenCalled();
+    expect(globalThis.fetch).not.toHaveBeenCalled();
+  });
+
+  it('the apiHandler the hook returns (what ConsoleShell registers) takes the same path', async () => {
+    const { runtime } = runnerFor([]);
+    const { tab } = stubWindowOpen();
+
+    await act(async () => {
+      await runtime.apiHandler({ ...NEW_TAB_ACTION, params: { recordId: 'rec-1' } } as any);
+    });
+
+    expect(tab.location.href).toBe(`${window.location.origin}/export/rec-1`);
+    expect(authFetchSpy).not.toHaveBeenCalled();
+  });
+
+  it('two rows selected: refused before any tab opens, with nothing sent', async () => {
+    const { runner } = runnerFor([{ id: 'a' }, { id: 'b' }]);
+    const { open } = stubWindowOpen();
+
+    let result: any;
+    await act(async () => {
+      result = await runner.execute({ ...NEW_TAB_ACTION } as any);
+    });
+
+    expect(result.success).toBe(false);
+    expect(open).not.toHaveBeenCalled();
+    expect(authFetchSpy).not.toHaveBeenCalled();
+  });
+
+  it('CONTROL: without newTabUrl the api action still sends its request to the target', async () => {
+    const { newTabUrl: _dropped, ...withoutNewTabUrl } = NEW_TAB_ACTION;
+    const { runner } = runnerFor([{ id: 'row 7' }]);
+    const { open } = stubWindowOpen();
+
+    await act(async () => {
+      await runner.execute({ ...withoutNewTabUrl } as any);
+    });
+
+    expect(authFetchSpy).toHaveBeenCalledTimes(1);
+    const [url, init] = authFetchSpy.mock.calls[0] as unknown as [string, RequestInit];
+    expect(url.endsWith(TARGET)).toBe(true);
+    expect(init.method).toBe('POST');
+    expect(open).not.toHaveBeenCalledWith('about:blank', '_blank');
+  });
+});
@@ -53,6 +53,7 @@ import { entitlementDialogFromError, type EntitlementDialogSpec } from '../envir
 import { resolvePageVarTokens } from '../utils/resolvePageVarTokens.js';
 import { launchConsoleFlow } from '../utils/flowLaunch.js';
 import { createConsoleServerActionHandler } from '../utils/consoleServerAction.js';
+import { withNewTabUrlFastPath } from '../utils/newTabUrlFastPath.js';
 import { modalTargetRefusalMessage } from '../utils/modalTargetDiagnostics.js';
 import { actionContextOrg } from '../utils/actionContextOrg.js';
 import { resolveHostAppSegment } from '../utils/appRoute.js';
@@ -803,6 +804,14 @@ export function useConsoleActionRuntime(opts: ConsoleActionRuntimeOptions): Cons
     [flowDispatch, serverActionHandler],
   );
 
+  // The registered `api` handler: {@link apiHandler}, except that an action
+  // declaring `opensInNewTab` + `newTabUrl` takes the server-action handler's
+  // zero-roundtrip new-tab path, which sends no request (objectstack#26747).
+  const apiActionHandler = useMemo(
+    () => withNewTabUrlFastPath(apiHandler, serverActionHandler),
+    [apiHandler, serverActionHandler],
+  );
+
   // Client-side modal transport, shared with RecordDetailView so a
   // `type: 'modal'` action behaves the SAME on a list page, an SDUI page, a
   // declared-actions bar and a record page. Before this, only RecordDetailView
@@ -883,10 +892,10 @@ export function useConsoleActionRuntime(opts: ConsoleActionRuntimeOptions): Cons
     onParamCollection: paramCollectionHandler,
     onResultDialog: resultDialogHandler,
     onModal: modalHandler,
-    handlers: { api: apiHandler, flow: flowHandler, script: serverActionHandler, modal: modalActionHandler },
+    handlers: { api: apiActionHandler, flow: flowHandler, script: serverActionHandler, modal: modalActionHandler },
   }), [
     objectName, objectDef, currentUser, activeOrganization, confirmHandler, toastHandler,
-    navigateHandler, paramCollectionHandler, resultDialogHandler, apiHandler,
+    navigateHandler, paramCollectionHandler, resultDialogHandler, apiActionHandler,
     flowHandler, serverActionHandler, modalHandler, modalActionHandler,
   ]);
 
@@ -982,7 +991,9 @@ export function useConsoleActionRuntime(opts: ConsoleActionRuntimeOptions): Cons
     navigateHandler,
     paramCollectionHandler,
     resultDialogHandler,
-    apiHandler,
+    // The composed handler, so every host that registers it (ConsoleShell's
+    // root provider included) honours the `newTabUrl` fast path.
+    apiHandler: apiActionHandler,
     flowHandler,
     serverActionHandler,
     modalActionHandler,
 
@@ -53,6 +53,7 @@ import {
   type ServerActionHandler,
   type ServerActionRecordIdResolver,
 } from '@object-ui/core';
+import { takesNewTabUrlFastPath } from './newTabUrlFastPath.js';
 
 /**
  * i18next-style translate function: `t(key, englishDefault)` returns the
@@ -185,8 +186,8 @@ export function createConsoleServerActionHandler(opts: ConsoleServerActionOption
     // until the (possibly slow) endpoint commits its redirect. Record-id
     // resolution runs BEFORE the pre-open so a blocked resolution
     // (multi-select, empty selection) never flashes a tab.
-    const newTabUrl = typeof action.newTabUrl === 'string' ? action.newTabUrl : '';
-    if (action.opensInNewTab && newTabUrl) {
+    if (takesNewTabUrlFastPath(action)) {
+      const newTabUrl = action.newTabUrl;
       // Both refusals below are shown in the session's language
       // (objectui#13397): the resolver's through the pack key it names
       // (objectui#13384), this wrapper's own through `console.serverAction.*`.
 
@@ -0,0 +1,62 @@
+/**
+ * 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.
+ */
+
+/**
+ * The `newTabUrl` fast path's routing rule, shared by the console server-action
+ * handler (`consoleServerAction`) and the hosts that register a `type: 'api'`
+ * handler beside it (`useConsoleActionRuntime`, `RecordDetailView`).
+ *
+ * It lives apart from `consoleServerAction` on purpose: the hosts' tests stub
+ * that module with a factory, and a rule kept there would vanish under every
+ * such stub. Kept here, an api action is routed by the same rule under test as
+ * in the console.
+ */
+
+import type { ActionContext, ActionDef, ActionResult, ServerActionHandler } from '@object-ui/core';
+
+/**
+ * Whether `action` takes the zero-roundtrip `newTabUrl` fast path:
+ * `opensInNewTab` plus a non-empty `newTabUrl`. The spec gives that pair one
+ * meaning whatever the action's `type` — navigate the pre-opened tab, no
+ * request — so a host's `type: 'api'` handler asks this and hands such an
+ * action to the handler `createConsoleServerActionHandler` builds,
+ * instead of sending its own request to `target`.
+ */
+export function takesNewTabUrlFastPath(action: ActionDef): action is ActionDef & { newTabUrl: string } {
+  return !!action.opensInNewTab && typeof action.newTabUrl === 'string' && action.newTabUrl !== '';
+}
+
+/**
+ * A host's registered `type: 'api'` handler, made to honour the `newTabUrl`
+ * fast path: an action that {@link takesNewTabUrlFastPath} goes to
+ * `consoleHandler` (the handler `createConsoleServerActionHandler`
+ * built for the same surface, so the record id resolves the way that surface
+ * resolves it), and every other action to `apiHandler` unchanged.
+ *
+ * Without it the console's api handlers sent their request to `target` and
+ * never read the pair, so a `type: 'api'` action declaring `opensInNewTab` +
+ * `newTabUrl` opened no tab and POSTed instead, from the record header, its
+ * more-menu and the list toolbar alike (objectstack#26747). The pair's early
+ * row-count refusal is the fast path's own, forwarded only for those actions;
+ * an ordinary api action keeps having none.
+ */
+export function withNewTabUrlFastPath(
+  apiHandler: (action: ActionDef, context?: ActionContext) => Promise<ActionResult>,
+  consoleHandler: ServerActionHandler,
+): ServerActionHandler {
+  return Object.assign(
+    (action: ActionDef, context?: ActionContext) => (takesNewTabUrlFastPath(action)
+      ? consoleHandler(action, context)
+      : apiHandler(action, context)),
+    {
+      refuseBeforeInput: (action: ActionDef, context?: ActionContext) => (takesNewTabUrlFastPath(action)
+        ? consoleHandler.refuseBeforeInput?.(action, context)
+        : undefined),
+    },
+  );
+}