diff --git a/continue.md b/continue.md
index be0bd2e3d..d1a1ff18d 100644
--- a/continue.md
+++ b/continue.md
@@ -61,9 +61,11 @@ Actualizacion 2026-05-15:
     area 2D, slider de canal y swatches con commit/cierre.
   - Cobertura nueva para NavigationMenu: timers UIX de apertura/cierre,
     enlace item/trigger/content, foco por teclado, list y link props.
+  - Cobertura nueva para TreeGrid: expansión, selección/rango, filas visibles
+    bajo ancestros colapsados, navegación, row/cell/header y expand trigger.
   - Validado por fase:
     - `npm run check` -> 0 errores, 0 warnings.
-    - `npm run test` -> 191 archivos, 2105 tests OK.
+    - `npm run test` -> 192 archivos, 2109 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.
@@ -83,6 +85,7 @@ Actualizacion 2026-05-15:
     - `color-field-provider.svelte.test.ts` -> 4 tests OK.
     - `color-picker-provider.svelte.test.ts` -> 4 tests OK.
     - `navigation-menu-provider.svelte.test.ts` -> 4 tests OK.
+    - `tree-grid-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 e6bb3bf57..b6038b9ec 100644
--- a/src/uix/soma/SOMA_ARCHITECTURE.md
+++ b/src/uix/soma/SOMA_ARCHITECTURE.md
@@ -493,12 +493,14 @@ Los tests por componente estan creciendo desde las piezas de mayor riesgo. A
   trigger/value/hidden, area 2D, slider de canal y swatches.
 - `navigation-menu/navigation-menu-provider.svelte.test.ts` — timers UIX,
   enlace item/trigger/content, foco por teclado y props de list/link.
+- `tree-grid/tree-grid-provider.svelte.test.ts` — expansión, selección/rango,
+  filas visibles, navegación y props de row/cell/header/expand trigger.
 
 Pendiente: seguir ampliando cobertura por familias de alto riesgo fuera del
 bloque fecha/hora, virtualización, inputs numericos, file upload, color y
-navegacion superior. `table-core`, `form-core` y el scorer de Command ya no
-viven dentro de Soma: se consumen desde `$libs/datagrid`, `$libs/forms` y
-`$libs/strings`.
+navegacion superior/treegrid. `table-core`, `form-core` y el scorer de Command
+ya no viven dentro de Soma: se consumen desde `$libs/datagrid`, `$libs/forms`
+y `$libs/strings`.
 
 ### Convencion
 
diff --git a/src/uix/soma/components/tree-grid/tree-grid-provider.svelte.test.ts b/src/uix/soma/components/tree-grid/tree-grid-provider.svelte.test.ts
new file mode 100644
index 000000000..d27ea5bdc
--- /dev/null
+++ b/src/uix/soma/components/tree-grid/tree-grid-provider.svelte.test.ts
@@ -0,0 +1,320 @@
+// @vitest-environment jsdom
+
+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 {
+	TreeGridCellProvider,
+	TreeGridColumnHeaderProvider,
+	TreeGridExpandTriggerProvider,
+	TreeGridHeaderProvider,
+	TreeGridProvider,
+	TreeGridRowChildrenProvider,
+	TreeGridRowProvider
+} from './tree-grid-provider.svelte';
+import type { TreeGridSelectionMode } from './types';
+
+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) => ({
+			cancel: vi.fn()
+		}))
+	};
+	const soma = {
+		dom,
+		langs: {
+			ts: (key: string) => key
+		},
+		prefs: {
+			getDir: () => 'ltr'
+		},
+		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(TreeGridProvider.ctx, 'set').mockImplementation((value) => value);
+	vi.spyOn(TreeGridRowProvider.ctx, 'set').mockImplementation((value) => value);
+	vi.spyOn(TreeGridRowProvider.ctx, 'getOr').mockReturnValue(undefined);
+
+	return { dom, timers };
+}
+
+function createTreeGridOpts(root: HTMLElement = document.createElement('div')) {
+	return {
+		id: state('tree-grid-root'),
+		ref: state<HTMLElement | null>(root),
+		expanded: state<string[]>([]),
+		value: state<string[]>([]),
+		selectionMode: state<TreeGridSelectionMode>('multiple'),
+		loop: state(false),
+		typeahead: state(true),
+		typeaheadTimeout: state(500),
+		disabled: state(false),
+		readonly: state(false),
+		ariaLabel: state<string | undefined>(undefined),
+		ariaLabelledby: state<string | undefined>(undefined),
+		onValueChange: state<((value: string[]) => void) | undefined>(undefined),
+		onExpandedChange: state<((value: string[]) => void) | undefined>(undefined)
+	};
+}
+
+function rowOpts(id: string, value: string, el: HTMLElement = document.createElement('div')) {
+	return {
+		id: state(id),
+		ref: state<HTMLElement | null>(el),
+		value: state(value),
+		hasChildren: state(false),
+		disabled: state(false),
+		textValue: state<string | undefined>(value)
+	};
+}
+
+function applyAttrs(el: HTMLElement, props: Record<string, unknown>) {
+	for (const [key, value] of Object.entries(props)) {
+		if (!key.startsWith('data-') && key !== 'role' && key !== 'id') continue;
+		if (value === undefined || value === false || typeof value === 'function') continue;
+		el.setAttribute(key, value === true ? '' : String(value));
+	}
+}
+
+function keyEvent(key: string, currentTarget: HTMLElement, extras: Record<string, unknown> = {}) {
+	return {
+		key,
+		currentTarget,
+		preventDefault: vi.fn(),
+		ctrlKey: false,
+		metaKey: false,
+		shiftKey: false,
+		altKey: false,
+		...extras
+	};
+}
+
+describe('TreeGridProvider', () => {
+	afterEach(() => {
+		vi.restoreAllMocks();
+		document.body.innerHTML = '';
+	});
+
+	it('expands, collapses, selects ranges and exposes root snippet state', () => {
+		const { dom } = installSomaHarness();
+		const root = document.createElement('div');
+		document.body.appendChild(root);
+		const opts = createTreeGridOpts(root);
+		const onExpandedChange = vi.fn();
+		const onValueChange = vi.fn();
+		opts.onExpandedChange.current = onExpandedChange;
+		opts.onValueChange.current = onValueChange;
+
+		const { result: provider, cleanup } = withEffectRoot(() => TreeGridProvider.create(opts));
+		applyAttrs(root, provider.props);
+
+		for (const value of ['a', 'b', 'c']) {
+			const row = document.createElement('div');
+			row.setAttribute('data-tree-grid-row', '');
+			row.setAttribute('data-value', value);
+			root.appendChild(row);
+		}
+
+		provider.expand('a');
+		provider.toggleExpand('a');
+		expect(opts.expanded.current).toEqual([]);
+		expect(onExpandedChange).toHaveBeenNthCalledWith(1, ['a']);
+		expect(onExpandedChange).toHaveBeenNthCalledWith(2, []);
+
+		provider.select('a', 'replace');
+		provider.select('c', 'range');
+
+		expect(opts.value.current).toEqual(['a', 'b', 'c']);
+		expect(onValueChange).toHaveBeenLastCalledWith(['a', 'b', 'c']);
+		expect(provider.snippetProps.selected).toEqual(['a', 'b', 'c']);
+
+		provider.clear();
+		expect(opts.value.current).toEqual([]);
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('filters visible rows under collapsed ancestors and navigates with arrows', () => {
+		const { dom } = installSomaHarness();
+		const focus = vi.spyOn(dom, 'focus');
+		const root = document.createElement('div');
+		document.body.appendChild(root);
+		const opts = createTreeGridOpts(root);
+		opts.expanded.current = [];
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = TreeGridProvider.create(opts);
+			vi.spyOn(TreeGridProvider.ctx, 'get').mockReturnValue(provider);
+			applyAttrs(root, provider.props);
+
+			const parentEl = document.createElement('div');
+			const groupEl = document.createElement('div');
+			const childEl = document.createElement('div');
+			const siblingEl = document.createElement('div');
+			root.append(parentEl, siblingEl);
+			parentEl.appendChild(groupEl);
+			groupEl.appendChild(childEl);
+
+			const parent = TreeGridRowProvider.create({
+				...rowOpts('tree-grid-parent', 'parent', parentEl),
+				hasChildren: state(true)
+			});
+			applyAttrs(parentEl, parent.props);
+			vi.spyOn(TreeGridRowProvider.ctx, 'get').mockReturnValue(parent);
+			const group = TreeGridRowChildrenProvider.create({
+				id: state('tree-grid-parent-children'),
+				ref: state<HTMLElement | null>(groupEl)
+			});
+			applyAttrs(groupEl, group.props);
+			const child = TreeGridRowProvider.create(rowOpts('tree-grid-child', 'child', childEl));
+			applyAttrs(childEl, child.props);
+			const sibling = TreeGridRowProvider.create(
+				rowOpts('tree-grid-sibling', 'sibling', siblingEl)
+			);
+			applyAttrs(siblingEl, sibling.props);
+
+			return { provider, parentEl, childEl, siblingEl };
+		});
+
+		expect(result.provider.getVisibleRows()).toEqual([result.parentEl, result.siblingEl]);
+
+		result.provider.handleRowKeydown(keyEvent('ArrowRight', result.parentEl) as never);
+		expect(opts.expanded.current).toEqual(['parent']);
+		result.parentEl.setAttribute('data-expanded', 'true');
+
+		expect(result.provider.getVisibleRows()).toEqual([
+			result.parentEl,
+			result.childEl,
+			result.siblingEl
+		]);
+
+		result.provider.handleRowKeydown(keyEvent('ArrowDown', result.parentEl) as never);
+		expect(focus).toHaveBeenCalledWith(result.childEl);
+
+		result.provider.handleRowKeydown(keyEvent('ArrowLeft', result.childEl) as never);
+		expect(focus).toHaveBeenCalledWith(result.parentEl);
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('builds row, cell, header and expand trigger props from provider state', () => {
+		const { dom } = installSomaHarness();
+		const opts = createTreeGridOpts();
+		opts.expanded.current = ['folder'];
+		opts.value.current = ['folder'];
+
+		const { result, cleanup } = withEffectRoot(() => {
+			const provider = TreeGridProvider.create(opts);
+			vi.spyOn(TreeGridProvider.ctx, 'get').mockReturnValue(provider);
+			const row = TreeGridRowProvider.create({
+				...rowOpts('tree-grid-folder', 'folder'),
+				hasChildren: state(true)
+			});
+			vi.spyOn(TreeGridRowProvider.ctx, 'get').mockReturnValue(row);
+			const trigger = TreeGridExpandTriggerProvider.create({
+				id: state('tree-grid-folder-expand'),
+				ref: state<HTMLElement | null>(null),
+				ariaLabel: state<string | undefined>(undefined)
+			});
+			const header = TreeGridHeaderProvider.create({
+				id: state('tree-grid-header'),
+				ref: state<HTMLElement | null>(null)
+			});
+			const columnHeader = TreeGridColumnHeaderProvider.create({
+				id: state('tree-grid-column-header'),
+				ref: state<HTMLElement | null>(null)
+			});
+			const cell = TreeGridCellProvider.create({
+				id: state('tree-grid-cell'),
+				ref: state<HTMLElement | null>(null)
+			});
+			return { row, trigger, header, columnHeader, cell };
+		});
+
+		expect(result.row.snippetProps).toMatchObject({
+			expanded: true,
+			selected: true,
+			level: 1,
+			hasChildren: true
+		});
+		expect(result.row.props).toMatchObject({
+			role: 'row',
+			'aria-expanded': true,
+			'aria-selected': true,
+			'data-state': 'selected',
+			'data-expanded': 'true',
+			'data-level': 1
+		});
+		expect(result.trigger.props).toMatchObject({
+			type: 'button',
+			tabindex: -1,
+			'data-state': 'open',
+			'aria-label': '#?components.tree-grid.collapse|Collapse row'
+		});
+		expect(result.header.props.role).toBe('row');
+		expect(result.columnHeader.props.role).toBe('columnheader');
+		expect(result.cell.props.role).toBe('gridcell');
+
+		cleanup();
+		dom.dispose();
+	});
+
+	it('handles row click modes, selectAll and disabled guards', () => {
+		const { dom } = installSomaHarness();
+		const root = document.createElement('div');
+		document.body.appendChild(root);
+		const opts = createTreeGridOpts(root);
+		const onValueChange = vi.fn();
+		opts.onValueChange.current = onValueChange;
+
+		const { result: provider, cleanup } = withEffectRoot(() => TreeGridProvider.create(opts));
+		applyAttrs(root, provider.props);
+
+		for (const value of ['a', 'b']) {
+			const row = document.createElement('div');
+			row.setAttribute('data-tree-grid-row', '');
+			row.setAttribute('data-value', value);
+			root.appendChild(row);
+		}
+
+		provider.selectAll();
+		expect(opts.value.current).toEqual(['a', 'b']);
+
+		provider.handleRowClick('a', keyEvent('click', root, { ctrlKey: true }) as never);
+		expect(opts.value.current).toEqual(['b']);
+
+		opts.disabled.current = true;
+		provider.select('c', 'replace');
+		provider.toggleExpand('c');
+		expect(opts.value.current).toEqual(['b']);
+		expect(opts.expanded.current).toEqual([]);
+
+		cleanup();
+		dom.dispose();
+	});
+});