diff --git a/continue.md b/continue.md
index 7a5540231..ab3c7836e 100644
--- a/continue.md
+++ b/continue.md
@@ -68,9 +68,11 @@ Actualizacion 2026-05-15:
   - Cobertura nueva para ContextMenu: apertura por `contextmenu` con anchor
     virtual, scoping de items, item select, checkbox/radio, submenu delayed/open
     y group/separator.
+  - Cobertura nueva para Menubar: coordinación de menús hermanos, hover-follow,
+    navegación horizontal entre triggers y cambio de menú desde content.
   - Validado por fase:
     - `npm run check` -> 0 errores, 0 warnings.
-    - `npm run test` -> 194 archivos, 2121 tests OK.
+    - `npm run test` -> 195 archivos, 2125 tests OK.
     - tests focales de Select/Popover/Toast/RangeCalendar -> 11 tests OK.
     - tests focales Dialog/Drawer/Popover/Select -> 10 tests OK.
     - `command-provider.svelte.test.ts` -> 2 tests OK.
@@ -93,6 +95,7 @@ Actualizacion 2026-05-15:
     - `tree-grid-provider.svelte.test.ts` -> 4 tests OK.
     - `dropdown-menu-provider.svelte.test.ts` -> 6 tests OK.
     - `context-menu-provider.svelte.test.ts` -> 6 tests OK.
+    - `menubar-provider.svelte.test.ts` -> 4 tests OK.
     - guardia `rg "from './.*provider\\.svelte'" src/uix/soma/components -g 'exports.ts'`
       -> solo queda `select/components/select-provider.svelte`, que es wrapper
       publico, no runtime provider.
diff --git a/src/uix/soma/SOMA_ARCHITECTURE.md b/src/uix/soma/SOMA_ARCHITECTURE.md
index 9827b9ed6..3531fb4ad 100644
--- a/src/uix/soma/SOMA_ARCHITECTURE.md
+++ b/src/uix/soma/SOMA_ARCHITECTURE.md
@@ -500,12 +500,14 @@ Los tests por componente estan creciendo desde las piezas de mayor riesgo. A
 - `context-menu/context-menu-provider.svelte.test.ts` — apertura por
   `contextmenu`, anchor virtual, scoping de items, selección, checkbox/radio,
   submenu y group/separator.
+- `menubar/menubar-provider.svelte.test.ts` — coordinación de menús hermanos,
+  hover-follow, navegación horizontal y cambio de menú desde content.
 
 Pendiente: seguir ampliando cobertura por familias de alto riesgo fuera del
 bloque fecha/hora, virtualización, inputs numericos, file upload, color y
-navegacion superior/treegrid/dropdown/context-menu. `table-core`, `form-core`
-y el scorer de Command ya no viven dentro de Soma: se consumen desde
-`$libs/datagrid`, `$libs/forms` y `$libs/strings`.
+navegacion superior/treegrid/dropdown/context-menu/menubar. `table-core`,
+`form-core` y el scorer de Command ya no viven dentro de Soma: se consumen
+desde `$libs/datagrid`, `$libs/forms` y `$libs/strings`.
 
 ### Convencion
 
diff --git a/src/uix/soma/components/menubar/menubar-provider.svelte.test.ts b/src/uix/soma/components/menubar/menubar-provider.svelte.test.ts
new file mode 100644
index 000000000..d18224dc5
--- /dev/null
+++ b/src/uix/soma/components/menubar/menubar-provider.svelte.test.ts
@@ -0,0 +1,264 @@
+// @vitest-environment jsdom
+
+import { flushSync } from 'svelte';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { createActiveDom } from '$adom';
+import { state } from '$libs/reactive';
+import type { Morfo } from '$uix/morfo';
+import { Soma } from '$soma/core/soma.svelte';
+import { createSomaRuntime, type SomaRuntimeSources } from '$soma/runtime.svelte';
+import { FloatingAnchor, FloatingProvider } from '../../layers/floating';
+import { MenuProvider as DropdownMenuProvider } from '../dropdown-menu/dropdown-menu-provider.svelte';
+
+import {
+	MenubarMenuProvider,
+	MenubarProvider,
+	MenubarTriggerProvider
+} from './menubar-provider.svelte';
+
+function withEffectRoot<T>(fn: () => T): { result: T; cleanup: () => void } {
+	let result!: T;
+	const cleanup = $effect.root(() => {
+		result = fn();
+	});
+	return { result, cleanup };
+}
+
+function installSomaHarness() {
+	const dom = createActiveDom();
+	const timers = {
+		schedule: vi.fn((key: string, delay: number, callback: () => void) => {
+			const timer = { key, delay, callback, cancel: vi.fn() };
+			return timer;
+		})
+	};
+	const soma = {
+		dom,
+		uix: { timers },
+		runtime: (morfo: Morfo, sources: Omit<SomaRuntimeSources, 'dom' | 'eventEngine'>) =>
+			createSomaRuntime(morfo, {
+				dom,
+				translate: (key) => key,
+				...sources
+			})
+	} as unknown as Soma;
+
+	vi.spyOn(Soma, 'require').mockReturnValue(soma);
+	vi.spyOn(FloatingProvider, 'create').mockReturnValue({} as FloatingProvider);
+	vi.spyOn(FloatingAnchor, 'create').mockReturnValue({} as FloatingAnchor);
+
+	vi.spyOn(MenubarProvider.ctx, 'set').mockImplementation((value) => value);
+	vi.spyOn(MenubarMenuProvider.ctx, 'set').mockImplementation((value) => value);
+	vi.spyOn(DropdownMenuProvider.ctx, 'set').mockImplementation((value) => value);
+
+	return { dom };
+}
+
+function createMenubarOpts() {
+	return {
+		id: state('menubar-root'),
+		ref: state<HTMLElement | null>(document.createElement('div')),
+		value: state(''),
+		dir: state<'ltr' | 'rtl'>('ltr'),
+		loop: state(true)
+	};
+}
+
+function menuOpts(value: string, onOpenChange = vi.fn()) {
+	return {
+		value: state(value),
+		onOpenChange: state(onOpenChange),
+		onOpenChangeComplete: state<(open: boolean) => void>(() => undefined)
+	};
+}
+
+function triggerOpts(id: string, disabled = false) {
+	return {
+		id: state(id),
+		ref: state<HTMLElement | null>(document.createElement('button')),
+		disabled: state(disabled)
+	};
+}
+
+function pointerEvent(button = 0, ctrlKey = false) {
+	return {
+		button,
+		ctrlKey,
+		preventDefault: vi.fn()
+	};
+}
+
+function keyEvent(key: string, target: HTMLElement = document.createElement('div')) {
+	return {
+		key,
+		target,
+		preventDefault: vi.fn()
+	};
+}
+
+function createMenuWithTrigger(value: string, disabled = false) {
+	const openChange = vi.fn();
+	const menu = MenubarMenuProvider.create(menuOpts(value, openChange));
+	vi.spyOn(MenubarMenuProvider, 'require').mockReturnValue(menu);
+	const trigger = MenubarTriggerProvider.create(triggerOpts(`menubar-${value}`, disabled));
+	menu.menu.contentId.current = `menubar-${value}-content`;
+	return { menu, trigger, openChange };
+}
+
+describe('MenubarProvider', () => {
+	afterEach(() => {
+		vi.restoreAllMocks();
+		document.body.innerHTML = '';
+	});
+
+	it('coordinates sibling menus through the root value', () => {
+		const { dom } = installSomaHarness();
+		const opts = createMenubarOpts();
+		const focusSpy = vi.spyOn(dom, 'focus');
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = MenubarProvider.create(opts);
+			vi.spyOn(MenubarProvider.ctx, 'get').mockReturnValue(provider);
+			const file = createMenuWithTrigger('file');
+			const edit = createMenuWithTrigger('edit');
+			return { provider, file, edit };
+		});
+		flushSync();
+
+		expect(result.provider.props).toMatchObject({
+			role: 'menubar',
+			'aria-orientation': 'horizontal',
+			dir: 'ltr'
+		});
+		expect(result.file.trigger.props).toMatchObject({
+			type: 'button',
+			role: 'menuitem',
+			'aria-haspopup': 'menu',
+			'aria-expanded': false,
+			'data-state': 'closed',
+			'data-menubar-value': 'file',
+			tabindex: 0
+		});
+		expect(result.edit.trigger.props.tabindex).toBe(-1);
+
+		const down = pointerEvent();
+		result.file.trigger.onpointerdown(down as never);
+		expect(down.preventDefault).toHaveBeenCalledOnce();
+		expect(opts.value.current).toBe('file');
+		expect(result.file.openChange).toHaveBeenCalledWith(true);
+		expect(result.file.trigger.props).toMatchObject({
+			'aria-expanded': true,
+			'aria-controls': 'menubar-file-content',
+			'data-state': 'open',
+			tabindex: 0
+		});
+
+		result.edit.trigger.onpointerenter();
+		expect(opts.value.current).toBe('edit');
+		expect(result.file.openChange).toHaveBeenCalledWith(false);
+		expect(result.edit.openChange).toHaveBeenCalledWith(true);
+		expect(focusSpy).toHaveBeenCalledWith(result.edit.trigger.opts.ref.current);
+
+		const close = pointerEvent();
+		result.edit.trigger.onpointerdown(close as never);
+		expect(close.preventDefault).not.toHaveBeenCalled();
+		expect(opts.value.current).toBe('');
+		expect(result.edit.openChange).toHaveBeenCalledWith(false);
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('navigates enabled triggers in DOM order and skips disabled nodes', () => {
+		const { dom } = installSomaHarness();
+		const opts = createMenubarOpts();
+		const focusSpy = vi.spyOn(dom, 'focus');
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = MenubarProvider.create(opts);
+			vi.spyOn(MenubarProvider.ctx, 'get').mockReturnValue(provider);
+			const file = createMenuWithTrigger('file');
+			const edit = createMenuWithTrigger('edit', true);
+			edit.trigger.opts.ref.current?.setAttribute('data-disabled', '');
+			const view = createMenuWithTrigger('view');
+			return { file, view };
+		});
+		flushSync();
+
+		const next = keyEvent('ArrowRight', result.file.trigger.opts.ref.current!);
+		result.file.trigger.onkeydown(next as never);
+		expect(next.preventDefault).toHaveBeenCalledOnce();
+		expect(focusSpy).toHaveBeenCalledWith(result.view.trigger.opts.ref.current);
+
+		const end = keyEvent('End', result.file.trigger.opts.ref.current!);
+		result.file.trigger.onkeydown(end as never);
+		expect(end.preventDefault).toHaveBeenCalledOnce();
+		expect(focusSpy).toHaveBeenLastCalledWith(result.view.trigger.opts.ref.current);
+
+		const home = keyEvent('Home', result.view.trigger.opts.ref.current!);
+		result.view.trigger.onkeydown(home as never);
+		expect(home.preventDefault).toHaveBeenCalledOnce();
+		expect(focusSpy).toHaveBeenLastCalledWith(result.file.trigger.opts.ref.current);
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('opens a trigger from keyboard activation without moving focus', () => {
+		const { dom } = installSomaHarness();
+		const opts = createMenubarOpts();
+		const focusSpy = vi.spyOn(dom, 'focus');
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = MenubarProvider.create(opts);
+			vi.spyOn(MenubarProvider.ctx, 'get').mockReturnValue(provider);
+			const file = createMenuWithTrigger('file');
+			return { file };
+		});
+		flushSync();
+
+		const event = keyEvent('ArrowDown', result.file.trigger.opts.ref.current!);
+		result.file.trigger.onkeydown(event as never);
+
+		expect(event.preventDefault).toHaveBeenCalledOnce();
+		expect(opts.value.current).toBe('file');
+		expect(focusSpy).not.toHaveBeenCalled();
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('switches open menu from content horizontal navigation', () => {
+		const { dom } = installSomaHarness();
+		const opts = createMenubarOpts();
+		const focusSpy = vi.spyOn(dom, 'focus');
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = MenubarProvider.create(opts);
+			vi.spyOn(MenubarProvider.ctx, 'get').mockReturnValue(provider);
+			const file = createMenuWithTrigger('file');
+			const edit = createMenuWithTrigger('edit');
+			provider.open('file');
+			return { file, edit };
+		});
+		flushSync();
+
+		const target = document.createElement('div');
+		const event = keyEvent('ArrowRight', target);
+		result.file.menu.onContentKeydown(event as never);
+
+		expect(event.preventDefault).toHaveBeenCalledOnce();
+		expect(opts.value.current).toBe('edit');
+		expect(focusSpy).toHaveBeenCalledWith(result.edit.trigger.opts.ref.current);
+
+		const subTrigger = document.createElement('div');
+		subTrigger.setAttribute('data-dropdown-menu-sub-trigger', '');
+		const subEvent = keyEvent('ArrowRight', subTrigger);
+		result.edit.menu.onContentKeydown(subEvent as never);
+		expect(subEvent.preventDefault).not.toHaveBeenCalled();
+
+		cleanup();
+		dom.dispose();
+	});
+});