diff --git a/.changeset/action-group-2nd-gen-migration.md b/.changeset/action-group-2nd-gen-migration.md
new file mode 100644
index 00000000000..1c1dd42cb01
--- /dev/null
+++ b/.changeset/action-group-2nd-gen-migration.md
@@ -0,0 +1,13 @@
+---
+'@adobe/spectrum-wc': minor
+'@spectrum-web-components/core': minor
+'@spectrum-web-components/action-group': patch
+---
+
+Add the 2nd-gen `<swc-action-group>` file structure, API, and accessibility semantics, migrated from the Spectrum 1 `<sp-action-group>`.
+
+- **API**: `accessible-label`, `disabled`, `orientation` (`horizontal` / `vertical`), `compact`, `quiet`, `justified`, `size`, `static-color`; children are collected via the default slot (`swc-action-button` / `swc-action-menu`).
+- **Accessibility**: host always `role="group"` (never `toolbar` or `radiogroup`); `accessible-label` reflects to `aria-label`; `aria-orientation="vertical"` set only for vertical layout; group `disabled` sets `aria-disabled="true"` on the host and propagates `aria-disabled` (not native `disabled`) to all children so they remain keyboard-reachable and discoverable per [APG: Focusability of disabled controls](https://www.w3.org/WAI/ARIA/apg/practices/keyboard-interface/#focusabilityofdisabledcontrols); `FocusgroupNavigationController` wired with `skipDisabled: false` so `aria-disabled` children stay in the arrow-key sequence.
+- **`ButtonBase` (core)**: click activation is now suppressed for any button whose host carries `aria-disabled="true"`, matching the existing suppression for `disabled` and `pending`. This is shared behavior for every `ButtonBase` subclass, not just `swc-action-button`.
+- **`swc-action-button`**: added disabled-appearance CSS for the externally-set `aria-disabled` case (e.g. when disabled via a parent `swc-action-group`), including forced-colors system-color overrides.
+- **1st-gen `sp-action-group`**: added `@deprecated` JSDoc to `vertical`, `selects`, `selected`, and `emphasized`, plus a runtime `window.__swc.warn()` deprecation notice on the `selected` setter, ahead of removal in 2nd-gen.
diff --git a/1st-gen/packages/action-group/src/ActionGroup.ts b/1st-gen/packages/action-group/src/ActionGroup.ts
index 8d2176de984..f9c50fd2a72 100644
--- a/1st-gen/packages/action-group/src/ActionGroup.ts
+++ b/1st-gen/packages/action-group/src/ActionGroup.ts
@@ -102,8 +102,30 @@ export class ActionGroup extends SizedMixin(SpectrumElement, {
   @property({ type: Boolean, reflect: true })
   public compact = false;
 
+  /**
+   * @deprecated The `emphasized` property is deprecated and will be removed
+   * in a future release.
+   */
   @property({ type: Boolean, reflect: true })
-  public emphasized = false;
+  public set emphasized(value: boolean) {
+    const oldValue = this._emphasized;
+    this._emphasized = value;
+    this.requestUpdate('emphasized', oldValue);
+    if (window.__swc?.DEBUG) {
+      window.__swc.warn(
+        this,
+        `The "emphasized" attribute on <${this.localName}> is deprecated and will be removed in a future release.`,
+        'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+        { level: 'deprecation' }
+      );
+    }
+  }
+
+  public get emphasized(): boolean {
+    return this._emphasized;
+  }
+
+  private _emphasized = false;
 
   @property({ type: Boolean, reflect: true })
   public justified = false;
@@ -114,20 +136,81 @@ export class ActionGroup extends SizedMixin(SpectrumElement, {
   @property({ type: Boolean, reflect: true })
   public quiet = false;
 
+  /**
+   * @deprecated The `selects` property is deprecated and will be removed in
+   * a future release. Selection UX will be available via `swc-toggle-button-group`
+   * (toggle and multi-select) and `swc-segmented-control` (exclusive choice)
+   * in the 2nd-gen library.
+   */
   @property({ type: String })
-  public selects: undefined | 'single' | 'multiple';
+  public set selects(value: undefined | 'single' | 'multiple') {
+    const oldValue = this._selects;
+    this._selects = value;
+    this.requestUpdate('selects', oldValue);
+    if (window.__swc?.DEBUG) {
+      window.__swc.warn(
+        this,
+        `The "selects" attribute on <${this.localName}> is deprecated and will be removed in a future release. Selection UX is available via \`swc-toggle-button-group\` (toggle and multi-select) and \`swc-segmented-control\` (exclusive choice) in the 2nd-gen library.`,
+        'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+        { level: 'deprecation' }
+      );
+    }
+  }
+
+  public get selects(): undefined | 'single' | 'multiple' {
+    return this._selects;
+  }
+
+  private _selects: undefined | 'single' | 'multiple' = undefined;
 
   @property({ reflect: true, attribute: 'static-color' })
   public staticColor?: 'white' | 'black';
 
+  /**
+   * @deprecated The `vertical` attribute is deprecated and will be removed in
+   * a future release. Use `orientation="vertical"` on `swc-action-group`
+   * instead.
+   */
   @property({ type: Boolean, reflect: true })
-  public vertical = false;
+  public set vertical(value: boolean) {
+    const oldValue = this._vertical;
+    this._vertical = value;
+    this.requestUpdate('vertical', oldValue);
+    if (window.__swc?.DEBUG) {
+      window.__swc.warn(
+        this,
+        `The "vertical" attribute on <${this.localName}> is deprecated and will be removed in a future release. Use \`orientation="vertical"\` on \`swc-action-group\` instead.`,
+        'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+        { level: 'deprecation' }
+      );
+    }
+  }
+
+  public get vertical(): boolean {
+    return this._vertical;
+  }
+
+  private _vertical = false;
 
   private _selected: string[] = EMPTY_SELECTION;
 
+  /**
+   * @deprecated The `selected` property is deprecated and will be removed in
+   * a future release. Selection UX is available via `swc-toggle-button-group`
+   * (toggle and multi-select) and `swc-segmented-control` (exclusive choice)
+   * in the 2nd-gen library.
+   */
   set selected(selected: string[]) {
     this.requestUpdate('selected', this._selected);
     this._selected = selected;
+    if (window.__swc?.DEBUG) {
+      window.__swc.warn(
+        this,
+        `The "selected" attribute on <${this.localName}> is deprecated and will be removed in a future release.`,
+        'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+        { level: 'deprecation' }
+      );
+    }
     this.updateComplete.then(() => {
       this.applySelects();
       this.manageChildren();
diff --git a/2nd-gen/packages/core/components/action-group/ActionGroup.base.ts b/2nd-gen/packages/core/components/action-group/ActionGroup.base.ts
new file mode 100644
index 00000000000..813b8905d2e
--- /dev/null
+++ b/2nd-gen/packages/core/components/action-group/ActionGroup.base.ts
@@ -0,0 +1,211 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import { PropertyValues } from 'lit';
+import { property, queryAssignedElements } from 'lit/decorators.js';
+
+import { SpectrumElement } from '@spectrum-web-components/core/element/index.js';
+import { SizedMixin } from '@spectrum-web-components/core/mixins/index.js';
+
+import {
+  ACTION_GROUP_ORIENTATIONS,
+  ACTION_GROUP_STATIC_COLORS,
+  ACTION_GROUP_VALID_SIZES,
+  type ActionGroupOrientation,
+  type ActionGroupSize,
+} from './ActionGroup.types.js';
+
+/**
+ * An action group clusters related action buttons together with composite
+ * keyboard navigation: one Tab stop into the strip, arrow keys move among
+ * `swc-action-button` and `swc-action-menu` children.
+ *
+ * This base class owns the accessibility semantics, `accessible-label` →
+ * `aria-label` management, `disabled` state contract, and child collection logic.
+ * Rendering and styling live in the concrete SWC subclass.
+ *
+ * @slot - One or more `swc-action-button` or `swc-action-menu` elements.
+ *
+ * @attribute {ActionGroupSize} size - The size of the group and its children.
+ */
+export abstract class ActionGroupBase extends SizedMixin(SpectrumElement, {
+  validSizes: ACTION_GROUP_VALID_SIZES,
+  noDefaultSize: true,
+}) {
+  static override shadowRootOptions = {
+    ...SpectrumElement.shadowRootOptions,
+    delegatesFocus: true,
+  };
+
+  /**
+   * The size of the action group. Propagated to all slotted children.
+   */
+  declare public size: ActionGroupSize;
+
+  // ──────────────────
+  //     SHARED API
+  // ──────────────────
+
+  /**
+   * @internal
+   *
+   * Valid orientation values for validation.
+   */
+  static readonly ORIENTATIONS: readonly string[] = ACTION_GROUP_ORIENTATIONS;
+
+  /**
+   * @internal
+   *
+   * Valid static-color values for validation.
+   */
+  static readonly STATIC_COLORS: readonly string[] = ACTION_GROUP_STATIC_COLORS;
+
+  /**
+   * The layout direction of the action group.
+   *
+   * When set to `"vertical"`, the group stacks children vertically and
+   * `aria-orientation="vertical"` is applied to the host. When `"horizontal"`
+   * (the default), `aria-orientation` is omitted because horizontal is the
+   * implicit default for `role="group"`.
+   *
+   * @default horizontal
+   */
+  @property({ type: String, reflect: true })
+  public orientation: ActionGroupOrientation = 'horizontal';
+
+  /**
+   * Accessible label for the group. Reflected to `aria-label` on the host.
+   *
+   * Providing a label is recommended whenever the strip has a distinct
+   * purpose (e.g. "Text formatting" or "Alignment"). An empty value removes
+   * the `aria-label` attribute.
+   */
+  @property({ type: String, attribute: 'accessible-label' })
+  public accessibleLabel = '';
+
+  /**
+   * Whether the group and all of its children are disabled.
+   *
+   * Sets `aria-disabled="true"` on the host and propagates `aria-disabled`
+   * to each managed child. Children remain keyboard-reachable so that screen
+   * reader users can still discover the group — native `disabled` is not
+   * applied to children.
+   */
+  @property({ type: Boolean, reflect: true })
+  public disabled = false;
+
+  // ──────────────────────
+  //     IMPLEMENTATION
+  // ──────────────────────
+
+  /**
+   * @internal
+   *
+   * The managed children: all `swc-action-button` and `swc-action-menu`
+   * elements assigned to the default slot. Populated by the concrete
+   * subclass via `@queryAssignedElements`.
+   */
+  @queryAssignedElements({ flatten: true })
+  protected managedChildren!: HTMLElement[];
+
+  /**
+   * Focuses the first enabled child in the group.
+   *
+   * The SWC concrete class overrides this with `FocusgroupNavigationController`,
+   * restoring focus to the last active item when memory is enabled. This
+   * implementation serves as a fallback for non-SWC subclasses.
+   */
+  public override focus(options?: FocusOptions): void {
+    const firstEnabled = this.managedChildren?.find(
+      (el) =>
+        !el.hasAttribute('disabled') &&
+        el.getAttribute('aria-disabled') !== 'true'
+    );
+    firstEnabled?.focus(options);
+  }
+
+  /**
+   * @internal
+   *
+   * Handles slot-change events. Propagates `aria-disabled` to newly slotted
+   * children when the group is disabled. Concrete subclasses call
+   * `super.handleSlotchange()` and then propagate visual attributes.
+   */
+  protected handleSlotchange(): void {
+    if (this.disabled) {
+      this.propagateDisabledToChildren();
+    }
+  }
+
+  protected override firstUpdated(changed: PropertyValues<this>): void {
+    super.firstUpdated(changed);
+    this.setAttribute('role', 'group');
+  }
+
+  protected override updated(changed: PropertyValues<this>): void {
+    super.updated(changed);
+
+    if (changed.has('accessibleLabel')) {
+      if (this.accessibleLabel) {
+        this.setAttribute('aria-label', this.accessibleLabel);
+      } else {
+        this.removeAttribute('aria-label');
+      }
+    }
+
+    if (changed.has('disabled')) {
+      if (this.disabled) {
+        this.setAttribute('aria-disabled', 'true');
+      } else {
+        this.removeAttribute('aria-disabled');
+      }
+      this.propagateDisabledToChildren();
+    }
+
+    if (changed.has('orientation')) {
+      if (this.orientation === 'vertical') {
+        this.setAttribute('aria-orientation', 'vertical');
+      } else {
+        this.removeAttribute('aria-orientation');
+      }
+    }
+
+    if (window.__swc?.DEBUG) {
+      const constructor = this.constructor as typeof ActionGroupBase;
+      if (!constructor.ORIENTATIONS.includes(this.orientation)) {
+        window.__swc.warn(
+          this,
+          `<${this.localName}> element expects the "orientation" attribute to be one of the following: ${constructor.ORIENTATIONS.join(', ')}.`,
+          'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+          { issues: [...constructor.ORIENTATIONS] }
+        );
+      }
+    }
+  }
+
+  private propagateDisabledToChildren(): void {
+    // `aria-disabled` is set on the child host element. For AT to announce the
+    // child as disabled, each child component must forward the host attribute to
+    // its inner interactive element. `swc-action-button` already does this
+    // (observes `aria-disabled` and forwards to its inner <button>).
+    // `swc-action-menu` will need the same treatment when it is built — it must
+    // forward `aria-disabled` from its host to its inner trigger element and
+    // apply disabled appearance via :host([aria-disabled="true"]) CSS.
+    for (const child of this.managedChildren ?? []) {
+      if (this.disabled) {
+        child.setAttribute('aria-disabled', 'true');
+      } else {
+        child.removeAttribute('aria-disabled');
+      }
+    }
+  }
+}
diff --git a/2nd-gen/packages/core/components/action-group/ActionGroup.types.ts b/2nd-gen/packages/core/components/action-group/ActionGroup.types.ts
new file mode 100644
index 00000000000..10d464d5b0c
--- /dev/null
+++ b/2nd-gen/packages/core/components/action-group/ActionGroup.types.ts
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import type { ElementSize } from '@spectrum-web-components/core/mixins/index.js';
+
+// ──────────────────
+//     SHARED
+// ──────────────────
+
+export const ACTION_GROUP_VALID_SIZES = [
+  'xs',
+  's',
+  'm',
+  'l',
+  'xl',
+] as const satisfies readonly ElementSize[];
+
+export const ACTION_GROUP_ORIENTATIONS = ['horizontal', 'vertical'] as const;
+
+export const ACTION_GROUP_STATIC_COLORS = ['white', 'black'] as const;
+
+// ──────────────────
+//     TYPES
+// ──────────────────
+
+export type ActionGroupSize = (typeof ACTION_GROUP_VALID_SIZES)[number];
+export type ActionGroupOrientation = (typeof ACTION_GROUP_ORIENTATIONS)[number];
+export type ActionGroupStaticColor =
+  (typeof ACTION_GROUP_STATIC_COLORS)[number];
diff --git a/2nd-gen/packages/core/components/action-group/index.ts b/2nd-gen/packages/core/components/action-group/index.ts
new file mode 100644
index 00000000000..ec084caee9f
--- /dev/null
+++ b/2nd-gen/packages/core/components/action-group/index.ts
@@ -0,0 +1,13 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+export * from './ActionGroup.base.js';
+export * from './ActionGroup.types.js';
diff --git a/2nd-gen/packages/core/components/button/Button.base.ts b/2nd-gen/packages/core/components/button/Button.base.ts
index 783f7939c99..ce86303fba5 100644
--- a/2nd-gen/packages/core/components/button/Button.base.ts
+++ b/2nd-gen/packages/core/components/button/Button.base.ts
@@ -165,14 +165,21 @@ export abstract class ButtonBase extends SizedMixin(
   }
 
   /**
-   * Suppresses click activation while the button is `disabled` or `pending`.
+   * Suppresses click activation while the button is `disabled`, `pending`,
+   * or externally marked `aria-disabled` (e.g. by a disabled parent
+   * `swc-action-group`, which uses `aria-disabled` instead of native
+   * `disabled` so children remain keyboard-reachable).
    *
    * Slotted icon content lives in the light DOM, so pointer clicks on icons
    * bypass the disabled inner `<button>` and bubble on the host. The host
    * listener (capture) and inner `@click` binding both call this handler.
    */
   protected readonly handleClick = (event: Event): void => {
-    if (this.disabled || this.pending) {
+    if (
+      this.disabled ||
+      this.pending ||
+      this.getAttribute('aria-disabled') === 'true'
+    ) {
       event.preventDefault();
       event.stopImmediatePropagation();
     }
diff --git a/2nd-gen/packages/core/package.json b/2nd-gen/packages/core/package.json
index 0716f4f6b4f..00b93561374 100644
--- a/2nd-gen/packages/core/package.json
+++ b/2nd-gen/packages/core/package.json
@@ -19,6 +19,10 @@
       "types": "./dist/components/action-button/index.d.ts",
       "import": "./dist/components/action-button/index.js"
     },
+    "./components/action-group": {
+      "types": "./dist/components/action-group/index.d.ts",
+      "import": "./dist/components/action-group/index.js"
+    },
     "./components/alert-banner": {
       "types": "./dist/components/alert-banner/index.d.ts",
       "import": "./dist/components/alert-banner/index.js"
diff --git a/2nd-gen/packages/swc/components/action-button/ActionButton.ts b/2nd-gen/packages/swc/components/action-button/ActionButton.ts
index 4d0935b7237..b5e336ed2c7 100644
--- a/2nd-gen/packages/swc/components/action-button/ActionButton.ts
+++ b/2nd-gen/packages/swc/components/action-button/ActionButton.ts
@@ -37,7 +37,11 @@ import styles from './action-button.css';
  * @slot icon - Optional leading icon displayed before the label.
  *
  * @cssprop --swc-action-button-min-block-size - Minimum block size. Defaults to the medium component height token.
- * @cssprop --swc-action-button-border-radius - Corner radius. Defaults to `corner-radius-medium-size-medium`.
+ * @cssprop --swc-action-button-border-radius - Corner radius applied to all four corners. Defaults to `corner-radius-medium-size-medium`.
+ * @cssprop --swc-action-button-border-start-start-radius - Start-start corner radius override. Defaults to `--swc-action-button-border-radius`. Used by `swc-action-group` compact mode to reset interior corners.
+ * @cssprop --swc-action-button-border-start-end-radius - Start-end corner radius override. Defaults to `--swc-action-button-border-radius`. Used by `swc-action-group` compact mode to reset interior corners.
+ * @cssprop --swc-action-button-border-end-start-radius - End-start corner radius override. Defaults to `--swc-action-button-border-radius`. Used by `swc-action-group` compact mode to reset interior corners.
+ * @cssprop --swc-action-button-border-end-end-radius - End-end corner radius override. Defaults to `--swc-action-button-border-radius`. Used by `swc-action-group` compact mode to reset interior corners.
  * @cssprop --swc-action-button-font-size - Font size of the label. Defaults to the medium font-size token.
  * @cssprop --swc-action-button-gap - Gap between icon and label.
  * @cssprop --swc-action-button-edge-to-text - Inline padding from edge to label text.
@@ -85,7 +89,12 @@ export class ActionButton extends ButtonBase {
   // conflicting with ARIAMixin types on HTMLElement and appearing in the CEM.
   /** @internal */
   static override get observedAttributes(): string[] {
-    return [...super.observedAttributes, 'aria-haspopup', 'aria-expanded'];
+    return [
+      ...super.observedAttributes,
+      'aria-haspopup',
+      'aria-expanded',
+      'aria-disabled',
+    ];
   }
 
   /**
@@ -121,6 +130,12 @@ export class ActionButton extends ButtonBase {
       }
       return;
     }
+    if (name === 'aria-disabled') {
+      // Kept on the host (not stripped) — the host attribute is the CSS hook
+      // for disabled appearance via :host([aria-disabled="true"]). The value
+      // is also stored as reactive state so the inner <button> stays in sync.
+      this._ariaDisabled = value ?? undefined;
+    }
     super.attributeChangedCallback(name, old, value);
   }
 
@@ -148,6 +163,9 @@ export class ActionButton extends ButtonBase {
   @state()
   private _ariaExpanded?: string;
 
+  @state()
+  private _ariaDisabled?: string;
+
   // Guard against re-entrant attributeChangedCallback: removeAttribute fires a
   // second callback with value=null; the guard prevents that from clearing the
   // state we just set.
@@ -174,7 +192,7 @@ export class ActionButton extends ButtonBase {
         @click=${this.handleClick}
         ?disabled=${this.disabled}
         aria-disabled=${ifDefined(
-          this.pending && !this.disabled ? 'true' : undefined
+          this.pending && !this.disabled ? 'true' : this._ariaDisabled
         )}
         aria-label=${ifDefined(
           this.pending ? this.getPendingAccessibleName() : this.accessibleLabel
diff --git a/2nd-gen/packages/swc/components/action-button/action-button.css b/2nd-gen/packages/swc/components/action-button/action-button.css
index 1d069de9bc0..9a5eeda55ed 100644
--- a/2nd-gen/packages/swc/components/action-button/action-button.css
+++ b/2nd-gen/packages/swc/components/action-button/action-button.css
@@ -30,6 +30,7 @@
   -webkit-tap-highlight-color: transparent;
   display: inline-flex;
   position: relative;
+  inline-size: 100%;
   gap: var(--swc-action-button-gap, token("base-gap-medium"));
   align-items: center;
   justify-content: center;
@@ -45,7 +46,10 @@
   text-decoration: none;
   background-color: var(--swc-action-button-background-color-default, token("gray-100"));
   border: var(--_swc-action-button-border-width) solid var(--swc-action-button-border-color-default, transparent);
-  border-radius: var(--swc-action-button-border-radius, token("corner-radius-medium-size-medium"));
+  border-start-start-radius: var(--swc-action-button-border-start-start-radius, var(--swc-action-button-border-radius, token("corner-radius-medium-size-medium")));
+  border-start-end-radius: var(--swc-action-button-border-start-end-radius, var(--swc-action-button-border-radius, token("corner-radius-medium-size-medium")));
+  border-end-start-radius: var(--swc-action-button-border-end-start-radius, var(--swc-action-button-border-radius, token("corner-radius-medium-size-medium")));
+  border-end-end-radius: var(--swc-action-button-border-end-end-radius, var(--swc-action-button-border-radius, token("corner-radius-medium-size-medium")));
   overflow: visible;
   cursor: default;
   user-select: none;
@@ -87,6 +91,17 @@
   transform: none;
 }
 
+/* Same inflated specificity — matches when aria-disabled is set externally
+   (e.g. by a disabled swc-action-group). Kept separate from :disabled so the
+   button stays focusable and shows a focus ring for keyboard users. */
+:host([aria-disabled="true"]) .swc-ActionButton:is(*, :hover) {
+  color: var(--swc-action-button-content-color-disabled, token("disabled-content-color"));
+  background-color: var(--swc-action-button-background-color-disabled, token("disabled-background-color"));
+  border-color: var(--swc-action-button-border-color-disabled, transparent);
+  cursor: default;
+  transform: none;
+}
+
 /* ── Sub-elements ─────────────────────────────────── */
 
 .swc-ActionButton-label {
@@ -275,6 +290,16 @@ slot[name="icon"]::slotted(*) {
   .swc-ActionButton {
     border-color: ButtonBorder;
   }
+
+  /* The browser's forced-colors UA only applies GrayText to natively :disabled
+     elements — aria-disabled gets ButtonText/ButtonBorder instead. Override the
+     disabled custom properties with system colors so the button reads as
+     unavailable in high-contrast mode. */
+  :host([aria-disabled="true"]) {
+    --swc-action-button-background-color-disabled: ButtonFace;
+    --swc-action-button-content-color-disabled: GrayText;
+    --swc-action-button-border-color-disabled: GrayText;
+  }
 }
 
 /* @global-exclude: pending state requires JS runtime (ButtonBase.pendingActive) */
diff --git a/2nd-gen/packages/swc/components/action-button/stories/action-button.stories.ts b/2nd-gen/packages/swc/components/action-button/stories/action-button.stories.ts
index dabd22b320f..ba5bd93e18f 100644
--- a/2nd-gen/packages/swc/components/action-button/stories/action-button.stories.ts
+++ b/2nd-gen/packages/swc/components/action-button/stories/action-button.stories.ts
@@ -40,6 +40,12 @@ argTypes['static-color'] = {
   options: ACTION_BUTTON_STATIC_COLORS,
 };
 
+// These are programmatic attributes set by parent components (action-group,
+// action-menu) — not user-facing controls.
+argTypes['aria-disabled'] = { table: { disable: true } };
+argTypes['aria-haspopup'] = { table: { disable: true } };
+argTypes['aria-expanded'] = { table: { disable: true } };
+
 /**
  * A compact action button for toolbars, action groups, and icon-first chrome.
  * Supports sizes `xs`–`xl`; `xs` is an action-button-specific addition not
diff --git a/2nd-gen/packages/swc/components/action-group/ActionGroup.ts b/2nd-gen/packages/swc/components/action-group/ActionGroup.ts
new file mode 100644
index 00000000000..ec2c91fbc80
--- /dev/null
+++ b/2nd-gen/packages/swc/components/action-group/ActionGroup.ts
@@ -0,0 +1,253 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import { CSSResultArray, html, PropertyValues, TemplateResult } from 'lit';
+import { property } from 'lit/decorators.js';
+
+import {
+  ActionGroupBase,
+  type ActionGroupStaticColor,
+} from '@spectrum-web-components/core/components/action-group';
+import { FocusgroupNavigationController } from '@spectrum-web-components/core/controllers';
+
+import styles from './action-group.css';
+
+/**
+ * An action group clusters related action buttons together with composite
+ * keyboard navigation: one Tab stop into the strip, arrow keys move among
+ * `swc-action-button` and `swc-action-menu` children.
+ *
+ * Unlike `swc-button-group`, which lets Tab reach each button independently,
+ * action group owns composite navigation (one Tab stop; arrow keys move
+ * among items).
+ *
+ * @element swc-action-group
+ * @since 2.0.0
+ *
+ * @slot - One or more `swc-action-button` or `swc-action-menu` elements.
+ *
+ * @cssprop --swc-action-group-gap - Space between children. Defaults to the medium spacing token (small spacing token at `xs`/`s` sizes).
+ *
+ * @example
+ * <swc-action-group accessible-label="Text formatting">
+ *   <swc-action-button>Bold</swc-action-button>
+ *   <swc-action-button>Italic</swc-action-button>
+ * </swc-action-group>
+ *
+ * @example
+ * <swc-action-group orientation="vertical" accessible-label="Alignment">
+ *   <swc-action-button>Left</swc-action-button>
+ *   <swc-action-button>Center</swc-action-button>
+ * </swc-action-group>
+ */
+export class ActionGroup extends ActionGroupBase {
+  // ───────────────────
+  //     API ADDITIONS
+  // ───────────────────
+
+  /**
+   * Whether the group uses compact density. Buttons visually join by
+   * collapsing shared borders and resetting interior border-radius values.
+   *
+   * Has no visual effect when `quiet` is also set.
+   */
+  @property({ type: Boolean, reflect: true })
+  public compact = false;
+
+  /**
+   * Whether the group and its children use the quiet visual style.
+   *
+   * Propagated to all slotted `swc-action-button` and `swc-action-menu`
+   * children. Also disables the compact border-join styling when both
+   * `compact` and `quiet` are set.
+   */
+  @property({ type: Boolean, reflect: true })
+  public quiet = false;
+
+  /**
+   * Whether slotted children should expand equally to fill the available
+   * inline width of the group.
+   */
+  @property({ type: Boolean, reflect: true })
+  public justified = false;
+
+  /**
+   * The static color variant to apply when the group is placed over an image
+   * or colored background. Propagated to all slotted children.
+   *
+   * - `"white"`: use on dark or colored backgrounds.
+   * - `"black"`: use on light backgrounds.
+   */
+  @property({ type: String, reflect: true, attribute: 'static-color' })
+  public staticColor?: ActionGroupStaticColor;
+
+  // ────────────────────
+  //     API OVERRIDES
+  // ────────────────────
+
+  /**
+   * Focuses the roving tab stop within the group. When the
+   * `FocusgroupNavigationController` has memory, restores focus to the last
+   * active item; otherwise falls back to the first managed child.
+   */
+  public override focus(options?: FocusOptions): void {
+    const target =
+      this.navigation.getActiveItem() ??
+      this.managedChildren?.find((el) => !el.hasAttribute('disabled'));
+    target?.focus(options);
+  }
+
+  // ──────────────────────────────
+  //     RENDERING & STYLING
+  // ──────────────────────────────
+
+  /**
+   * @internal
+   *
+   * Composite keyboard navigation controller. Manages roving `tabindex` among
+   * slotted `swc-action-button` and `swc-action-menu` children. Direction is
+   * initialized to `horizontal` and updated via `setOptions` whenever
+   * `orientation` changes.
+   *
+   * `skipDisabled: false` keeps all children — including those with
+   * `aria-disabled="true"` — in the roving tabindex sequence. This is
+   * intentional: per APG toolbar guidance, disabled items should remain
+   * keyboard-discoverable. Group-level `disabled` propagates `aria-disabled`
+   * to all children; with skip enabled those children would all be excluded
+   * and Tab could no longer enter the group.
+   *
+   * `wrap: true` matches the APG Toolbar example: arrow keys wrap from the
+   * last item to the first and vice versa.
+   */
+  private readonly navigation = new FocusgroupNavigationController(this, {
+    direction: this.orientation,
+    wrap: true,
+    skipDisabled: false,
+    getItems: () => this.managedChildren ?? [],
+  });
+
+  /**
+   * @internal
+   *
+   * Watches for `disabled` and `aria-disabled` attribute changes on individual
+   * managed children. `slotchange` does not fire when an existing child's
+   * disabled state changes, so without this observer the navigation controller
+   * would hold a stale tab-stop assignment (e.g. btn1 retaining tabindex=0
+   * after becoming disabled) and Tab could no longer enter the group.
+   */
+  private childObserver?: MutationObserver;
+
+  public static override get styles(): CSSResultArray {
+    return [styles];
+  }
+
+  public override connectedCallback(): void {
+    super.connectedCallback();
+    this.childObserver = new MutationObserver(() => {
+      this.navigation.refresh();
+    });
+  }
+
+  public override disconnectedCallback(): void {
+    super.disconnectedCallback();
+    this.childObserver?.disconnect();
+    this.childObserver = undefined;
+  }
+
+  protected override render(): TemplateResult {
+    return html`
+      <div class="swc-ActionGroup">
+        <slot role="presentation" @slotchange=${this.handleSlotchange}></slot>
+      </div>
+    `;
+  }
+
+  protected override handleSlotchange(): void {
+    super.handleSlotchange();
+    this.propagateVisualStateToChildren();
+
+    this.childObserver?.disconnect();
+    for (const child of this.managedChildren ?? []) {
+      this.childObserver?.observe(child, {
+        attributes: true,
+        attributeFilter: ['disabled', 'aria-disabled'],
+      });
+    }
+
+    this.navigation.refresh();
+  }
+
+  protected override updated(changed: PropertyValues<this>): void {
+    super.updated(changed);
+
+    if (changed.has('orientation')) {
+      this.navigation.setOptions({ direction: this.orientation });
+    }
+
+    if (
+      changed.has('quiet') ||
+      changed.has('size') ||
+      changed.has('staticColor') ||
+      // `compact` is pre-wired here so children re-render when the attribute
+      // changes, but the attribute is not propagated via JS — it affects layout
+      // via CSS cascade on ::slotted() selectors (wired in Phase 5).
+      changed.has('compact')
+    ) {
+      this.propagateVisualStateToChildren();
+    }
+
+    if (window.__swc?.DEBUG) {
+      const constructor = this.constructor as typeof ActionGroup;
+      if (
+        this.staticColor !== undefined &&
+        !constructor.STATIC_COLORS.includes(this.staticColor)
+      ) {
+        window.__swc.warn(
+          this,
+          `<${this.localName}> element expects the "static-color" attribute to be one of the following: ${constructor.STATIC_COLORS.join(', ')}.`,
+          'https://opensource.adobe.com/spectrum-web-components/components/action-group/',
+          { issues: [...constructor.STATIC_COLORS] }
+        );
+      }
+    }
+  }
+
+  /**
+   * @internal
+   *
+   * Propagates visual attributes (`quiet`, `size`, `staticColor`) to slotted
+   * children. Called on slot change and when any of these properties update.
+   *
+   * Note: `compact` affects children via CSS custom property cascade
+   * (`::slotted(:first-child)` / `::slotted(:last-child)` in Phase 5) rather
+   * than JS attribute propagation.
+   */
+  private propagateVisualStateToChildren(): void {
+    for (const child of this.managedChildren ?? []) {
+      if (this.quiet) {
+        child.setAttribute('quiet', '');
+      } else {
+        child.removeAttribute('quiet');
+      }
+
+      if (this.size) {
+        child.setAttribute('size', this.size);
+      }
+
+      if (this.staticColor !== undefined) {
+        child.setAttribute('static-color', this.staticColor);
+      } else {
+        child.removeAttribute('static-color');
+      }
+    }
+  }
+}
diff --git a/2nd-gen/packages/swc/components/action-group/action-group.css b/2nd-gen/packages/swc/components/action-group/action-group.css
new file mode 100644
index 00000000000..8f546315248
--- /dev/null
+++ b/2nd-gen/packages/swc/components/action-group/action-group.css
@@ -0,0 +1,128 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+/* ── Host ─────────────────────────────────────────── */
+
+:host {
+  display: inline-flex;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+/* ── Base component ───────────────────────────────── */
+
+.swc-ActionGroup {
+  --_swc-action-group-gap: var(--swc-action-group-gap, token("spacing-100"));
+
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--_swc-action-group-gap);
+  inline-size: 100%;
+}
+
+::slotted(*) {
+  flex-shrink: 0;
+}
+
+/* ── Orientation ──────────────────────────────────── */
+
+:host([orientation="vertical"]) .swc-ActionGroup {
+  flex-direction: column;
+}
+
+/* ── Sizes ────────────────────────────────────────── */
+
+:host([size="xs"]),
+:host([size="s"]) {
+  --swc-action-group-gap: token("spacing-75");
+}
+
+/* ── Justified ────────────────────────────────────── */
+
+:host([justified]) ::slotted(*) {
+  flex: 1 1 0%;
+}
+
+/* ── Compact ──────────────────────────────────────── */
+
+:host([compact]:not([quiet])) .swc-ActionGroup {
+  gap: 0;
+}
+
+:host([compact]:not([quiet], [orientation="vertical"])) .swc-ActionGroup {
+  flex-wrap: nowrap;
+}
+
+:host([compact]:not([quiet])) ::slotted(*) {
+  position: relative;
+  z-index: 0;
+}
+
+:host([compact]:not([quiet])) ::slotted(:hover) {
+  z-index: 1;
+}
+
+/* `:focus-visible` does not retarget through `delegatesFocus` in Chromium —
+   only `:focus`/`:focus-within` do — so `:focus-within` is used here even
+   though the visual ring itself is still gated by `:focus-visible` inside
+   action-button's own shadow root. */
+:host([compact]:not([quiet])) ::slotted(:focus-within) {
+  z-index: 2;
+}
+
+/* Horizontal: adjacent buttons share the inline edge between them. */
+
+:host([compact]:not([quiet], [orientation="vertical"])) ::slotted(:not(:first-child)) {
+  margin-inline-start: calc(-1 * token("border-width-100"));
+}
+
+:host([compact]:not([quiet], [orientation="vertical"])) ::slotted(:first-child:not(:last-child)) {
+  --swc-action-button-border-start-end-radius: 0;
+  --swc-action-button-border-end-end-radius: 0;
+}
+
+:host([compact]:not([quiet], [orientation="vertical"])) ::slotted(:last-child:not(:first-child)) {
+  --swc-action-button-border-start-start-radius: 0;
+  --swc-action-button-border-end-start-radius: 0;
+}
+
+:host([compact]:not([quiet], [orientation="vertical"])) ::slotted(:not(:first-child, :last-child)) {
+  --swc-action-button-border-start-start-radius: 0;
+  --swc-action-button-border-start-end-radius: 0;
+  --swc-action-button-border-end-start-radius: 0;
+  --swc-action-button-border-end-end-radius: 0;
+}
+
+/* Vertical: adjacent buttons share the block edge between them. */
+
+:host([compact]:not([quiet])[orientation="vertical"]) ::slotted(:not(:first-child)) {
+  margin-block-start: calc(-1 * token("border-width-100"));
+}
+
+:host([compact]:not([quiet])[orientation="vertical"]) ::slotted(:first-child:not(:last-child)) {
+  --swc-action-button-border-end-start-radius: 0;
+  --swc-action-button-border-end-end-radius: 0;
+}
+
+:host([compact]:not([quiet])[orientation="vertical"]) ::slotted(:last-child:not(:first-child)) {
+  --swc-action-button-border-start-start-radius: 0;
+  --swc-action-button-border-start-end-radius: 0;
+}
+
+:host([compact]:not([quiet])[orientation="vertical"]) ::slotted(:not(:first-child, :last-child)) {
+  --swc-action-button-border-start-start-radius: 0;
+  --swc-action-button-border-start-end-radius: 0;
+  --swc-action-button-border-end-start-radius: 0;
+  --swc-action-button-border-end-end-radius: 0;
+}
diff --git a/2nd-gen/packages/swc/components/action-group/index.ts b/2nd-gen/packages/swc/components/action-group/index.ts
new file mode 100644
index 00000000000..69e1103da9a
--- /dev/null
+++ b/2nd-gen/packages/swc/components/action-group/index.ts
@@ -0,0 +1,12 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+export * from './ActionGroup.js';
diff --git a/2nd-gen/packages/swc/components/action-group/stories/action-group.stories.ts b/2nd-gen/packages/swc/components/action-group/stories/action-group.stories.ts
new file mode 100644
index 00000000000..c9debec7f5b
--- /dev/null
+++ b/2nd-gen/packages/swc/components/action-group/stories/action-group.stories.ts
@@ -0,0 +1,309 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+import { html } from 'lit';
+import { ifDefined } from 'lit/directives/if-defined.js';
+import type { Meta, StoryObj as Story } from '@storybook/web-components';
+import { getStorybookHelpers } from '@wc-toolkit/storybook-helpers';
+
+import {
+  ACTION_GROUP_ORIENTATIONS,
+  ACTION_GROUP_STATIC_COLORS,
+  ACTION_GROUP_VALID_SIZES,
+} from '@spectrum-web-components/core/components/action-group';
+
+import '@adobe/spectrum-wc/components/action-group/swc-action-group.js';
+import '@adobe/spectrum-wc/components/action-button/swc-action-button.js';
+
+// ────────────────
+//    METADATA
+// ────────────────
+
+const { args, argTypes } = getStorybookHelpers('swc-action-group');
+
+argTypes.size = {
+  ...argTypes.size,
+  control: { type: 'select' },
+  options: [...ACTION_GROUP_VALID_SIZES],
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'none' },
+  },
+};
+
+argTypes.orientation = {
+  ...argTypes.orientation,
+  control: { type: 'select' },
+  options: [...ACTION_GROUP_ORIENTATIONS],
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'horizontal' },
+  },
+};
+
+argTypes.disabled = {
+  ...argTypes.disabled,
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'false' },
+  },
+};
+
+argTypes.compact = {
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'false' },
+  },
+};
+
+argTypes.quiet = {
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'false' },
+  },
+};
+
+argTypes.justified = {
+  table: {
+    category: 'attributes',
+    defaultValue: { summary: 'false' },
+  },
+};
+
+/**
+ * An action group clusters related action buttons together with composite
+ * keyboard navigation: one Tab stop into the strip, arrow keys move among
+ * `swc-action-button` and `swc-action-menu` children.
+ *
+ * Unlike [Button Group](../?path=/docs/button-group--overview), which lets
+ * Tab reach each button independently, action group owns composite navigation
+ * (one Tab stop; arrow keys move among items).
+ */
+const meta: Meta = {
+  title: 'Action Group',
+  component: 'swc-action-group',
+  args,
+  argTypes,
+  render: (renderArgs) => html`
+    <swc-action-group
+      accessible-label="Text formatting"
+      orientation=${renderArgs.orientation ?? 'horizontal'}
+      ?disabled=${renderArgs.disabled}
+      ?compact=${renderArgs.compact}
+      ?quiet=${renderArgs.quiet}
+      ?justified=${renderArgs.justified}
+      size=${ifDefined(renderArgs.size)}
+      static-color=${ifDefined(renderArgs['static-color'])}
+    >
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  parameters: {
+    docs: {
+      subtitle:
+        'Clusters related action buttons with composite keyboard navigation',
+    },
+    flexLayout: 'row-wrap',
+  },
+  tags: ['migrated'],
+};
+
+export default meta;
+
+// ────────────────────
+//    HELPERS
+// ────────────────────
+
+const sizeLabels = {
+  xs: 'Extra-small',
+  s: 'Small',
+  m: 'Medium',
+  l: 'Large',
+  xl: 'Extra-large',
+} as const satisfies Record<(typeof ACTION_GROUP_VALID_SIZES)[number], string>;
+
+// ────────────────────
+//    PLAYGROUND STORY
+// ────────────────────
+
+export const Playground: Story = {
+  tags: ['autodocs', 'dev'],
+  args: {
+    orientation: 'horizontal',
+    disabled: false,
+  },
+};
+
+// ──────────────────────────
+//    OVERVIEW STORY
+// ──────────────────────────
+
+export const Overview: Story = {
+  tags: ['overview'],
+  args: {
+    orientation: 'horizontal',
+  },
+};
+
+// ──────────────────────────
+//    ANATOMY STORIES
+// ──────────────────────────
+
+export const Anatomy: Story = {
+  render: () => html`
+    <swc-action-group accessible-label="Text formatting">
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  tags: ['anatomy'],
+};
+
+// ──────────────────────────
+//    OPTIONS STORIES
+// ──────────────────────────
+
+export const Sizes: Story = {
+  render: () => html`
+    ${ACTION_GROUP_VALID_SIZES.map(
+      (size) => html`
+        <swc-action-group accessible-label=${sizeLabels[size]} size=${size}>
+          <swc-action-button>${sizeLabels[size]}</swc-action-button>
+          <swc-action-button>Action</swc-action-button>
+        </swc-action-group>
+      `
+    )}
+  `,
+  tags: ['options'],
+  parameters: { 'section-order': 1 },
+};
+
+export const Orientations: Story = {
+  render: () => html`
+    ${ACTION_GROUP_ORIENTATIONS.map(
+      (orientation) => html`
+        <swc-action-group
+          accessible-label=${orientation}
+          orientation=${orientation}
+        >
+          <swc-action-button>${orientation} 1</swc-action-button>
+          <swc-action-button>${orientation} 2</swc-action-button>
+        </swc-action-group>
+      `
+    )}
+  `,
+  tags: ['options'],
+  parameters: { 'section-order': 2 },
+};
+
+export const StaticColors: Story = {
+  render: () => html`
+    ${ACTION_GROUP_STATIC_COLORS.map(
+      (staticColor) => html`
+        <swc-action-group
+          accessible-label=${staticColor}
+          static-color=${staticColor}
+        >
+          <swc-action-button>${staticColor}</swc-action-button>
+          <swc-action-button>Action</swc-action-button>
+        </swc-action-group>
+      `
+    )}
+  `,
+  tags: ['options', '!test'],
+  parameters: { staticColorsDemo: true, 'section-order': 3 },
+};
+StaticColors.storyName = 'Static colors';
+
+// ──────────────────────────
+//    STATES STORIES
+// ──────────────────────────
+
+export const Disabled: Story = {
+  render: () => html`
+    <swc-action-group accessible-label="Text formatting" disabled>
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  tags: ['states'],
+};
+
+// ──────────────────────────────
+//    BEHAVIORS STORIES
+// ──────────────────────────────
+
+export const Compact: Story = {
+  render: () => html`
+    <swc-action-group accessible-label="Text formatting" compact>
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+    <swc-action-group
+      accessible-label="Text formatting, vertical and compact"
+      orientation="vertical"
+      compact
+    >
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  tags: ['behaviors'],
+};
+
+export const Quiet: Story = {
+  render: () => html`
+    <swc-action-group accessible-label="Text formatting" quiet>
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+    <swc-action-group
+      accessible-label="Text formatting, compact and quiet"
+      quiet
+      compact
+    >
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  tags: ['behaviors'],
+};
+Quiet.storyName = 'Quiet (compact join disabled)';
+
+export const Justified: Story = {
+  render: () => html`
+    <swc-action-group
+      accessible-label="Text formatting"
+      justified
+      style="inline-size: 300px;"
+    >
+      <swc-action-button>Bold</swc-action-button>
+      <swc-action-button>Italic</swc-action-button>
+      <swc-action-button>Underline</swc-action-button>
+    </swc-action-group>
+  `,
+  tags: ['behaviors'],
+};
+
+// ────────────────────────────────
+//    ACCESSIBILITY STORIES
+// ────────────────────────────────
+
+// TODO: will complete in separate documentation pass of phase 7
diff --git a/2nd-gen/packages/swc/components/action-group/swc-action-group.ts b/2nd-gen/packages/swc/components/action-group/swc-action-group.ts
new file mode 100644
index 00000000000..b49fcb90a25
--- /dev/null
+++ b/2nd-gen/packages/swc/components/action-group/swc-action-group.ts
@@ -0,0 +1,22 @@
+/**
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+import { defineElement } from '@spectrum-web-components/core/element/index.js';
+
+import { ActionGroup } from './ActionGroup.js';
+
+declare global {
+  interface HTMLElementTagNameMap {
+    'swc-action-group': ActionGroup;
+  }
+}
+
+defineElement('swc-action-group', ActionGroup);
diff --git a/CONTRIBUTOR-DOCS/03_project-planning/02_workstreams/02_2nd-gen-component-migration/01_status.md b/CONTRIBUTOR-DOCS/03_project-planning/02_workstreams/02_2nd-gen-component-migration/01_status.md
index 183e68a4d36..48d66a26515 100644
--- a/CONTRIBUTOR-DOCS/03_project-planning/02_workstreams/02_2nd-gen-component-migration/01_status.md
+++ b/CONTRIBUTOR-DOCS/03_project-planning/02_workstreams/02_2nd-gen-component-migration/01_status.md
@@ -23,7 +23,7 @@
 | Accordion           | ✓ |                                                                                     |                                                                       |                                                                       |                                                                  |                                                                      | ✓                                                                      |
 | Action Bar          | |                                                                                     |                                                                       |                                                                       |                                                                  |                                                                      |                                                                        |
 | Action Button       | ✓ | ✓                                                                                   | ✓                                                                     | ✓                                                                     | ✓                                                                | ✓                                                                    | ✓                                                                      |
-| Action Group        | ✓ |  ✓                                                                                   |                                                                       |                                                                       |                                                                  |                                                                      |                                                                        |
+| Action Group        | ✓ |  ✓                                                                                   | ✓                                                                     | ✓                                                                     |                                                                  |                                                                      |                                                                        |
 | Action Menu         | |                                                                                     |                                                                       |                                                                       |                                                                  |                                                                      |                                                                        |
 | Alert Banner        | ✓ | ✓                                                                                   |                                                                       |                                                                       |                                                                  |                                                                      |                                                                        |
 | Alert Dialog        | |                                                                                     |                                                                       |                                                                       |                                                                  |                                                                      |                                                                        |
diff --git a/CONTRIBUTOR-DOCS/03_project-planning/03_components/action-group/migration-plan.md b/CONTRIBUTOR-DOCS/03_project-planning/03_components/action-group/migration-plan.md
index 0332f6f59be..e32fbcd4b9c 100644
--- a/CONTRIBUTOR-DOCS/03_project-planning/03_components/action-group/migration-plan.md
+++ b/CONTRIBUTOR-DOCS/03_project-planning/03_components/action-group/migration-plan.md
@@ -213,7 +213,7 @@ This full modifier surface will not be carried forward to 2nd-gen.
 | --- | ------------ | ---------------- | ---------------- | ----------------------- |
 | **B6** | Host role fixed to `role="group"` | Default `role="toolbar"`; switches to `role="radiogroup"` when `selects="single"` | Always `role="group"`; not author-overridable | Remove any `role="toolbar"` or `role="radiogroup"` on `<sp-action-group>`. Move `role="toolbar"` to a parent wrapper element. Source: [accessibility migration analysis](./accessibility-migration-analysis.md). |
 | **B7** | Child roles fixed to `role="button"` | `selects="single"` assigns `role="radio"` + `aria-checked`; `selects="multiple"` assigns `role="checkbox"` + `aria-checked` | Children always `role="button"`; `selects` and `selected` are dropped; selection UX moves to `swc-toggle-button-group` / `swc-segmented-control` | Remove any consumer code that relied on child `role="radio"`/`role="checkbox"` or on action-group's `selects`/`selected` API. Source: [accessibility migration analysis](./accessibility-migration-analysis.md), [action button accessibility migration analysis](../action-button/accessibility-migration-analysis.md). |
-| **B8** | `RovingTabindexController` → `FocusgroupNavigationController` | `RovingTabindexController` with `hostDelegatesFocus: true` | `FocusgroupNavigationController`; direction tied to `orientation`; `delegatesFocus` preserved | No consumer-visible change; keyboard behavior is equivalent |
+| **B8** | `RovingTabindexController` → `FocusgroupNavigationController` | `RovingTabindexController` with `hostDelegatesFocus: true` | `FocusgroupNavigationController`; direction tied to `orientation`; `delegatesFocus: true` preserved | No consumer-visible change; keyboard behavior is equivalent |
 | **B9** | Focus stacking z-index fixed | Focused button's z-index may hide focus indicator (SWC-1342) | Focus indicator always visible | No consumer action required |
 
 ### Additive — ships when ready, zero breakage for consumers already on 2nd-gen
@@ -300,7 +300,7 @@ Initial focus target: first enabled child.
 
 When a child `swc-action-menu` is open, focus enters the menu; when the menu closes, focus returns to the menu trigger (the `swc-action-menu` host).
 
-`delegatesFocus: true` on the shadow root is preserved: calling `focus()` on the host delegates to the current roving item.
+`delegatesFocus: true` is preserved from 1st-gen. The explicit `focus()` override in `ActionGroup.ts` handles programmatic focus calls by delegating to `FocusgroupNavigationController.getActiveItem()`.
 
 Mouse click updates the roving `tabindex="0"` to the clicked item (SWC-250 fix required; the 1st-gen mouse test is `it.skip`).
 
@@ -372,9 +372,9 @@ No `_lit-styles/` fragment needed — action-group renders only a slot; all layo
 
 ### Setup
 
-- [ ] Create `2nd-gen/packages/core/components/action-group/`
-- [ ] Create `2nd-gen/packages/swc/components/action-group/`
-- [ ] Wire exports in both `package.json` files
+- [x] Create `2nd-gen/packages/core/components/action-group/`
+- [x] Create `2nd-gen/packages/swc/components/action-group/`
+- [x] Wire exports in both `package.json` files
 - [ ] Check out `spectrum-css` at `spectrum-two` branch as sibling directory (required for Phase 5 styling)
 - [x] `FocusgroupNavigationController` confirmed available in this branch
 - [x] `swc-action-button` API confirmed: no `selected` property, no `aria-pressed`/`aria-checked` forwarding; compact uses CSS custom property cascade via `::slotted(:first-child)` / `::slotted(:last-child)` (action-button must expose `--swc-action-button-border-*-radius` fallbacks)
@@ -383,15 +383,15 @@ No `_lit-styles/` fragment needed — action-group renders only a slot; all layo
 
 #### Naming and public surface
 
-- [ ] `ActionGroup.types.ts`: define `ActionGroupOrientation` (`'horizontal' | 'vertical'`)
-- [ ] `ActionGroupSize` type: `(typeof ACTION_GROUP_VALID_SIZES)[number]` — same pattern as `BadgeSize`, `ButtonSize`, `StatusLightSize`
-- [ ] `ActionGroup.base.ts`: `label` → `aria-label`, `disabled` propagation contract, child collection logic
-- [ ] `ActionGroup.ts`: `compact`, `quiet`, `orientation`, `justified`, `size`, `staticColor`, child propagation, `FocusgroupNavigationController` wiring, `delegatesFocus: true`
+- [x] `ActionGroup.types.ts`: define `ActionGroupOrientation` (`'horizontal' | 'vertical'`)
+- [x] `ActionGroupSize` type: `(typeof ACTION_GROUP_VALID_SIZES)[number]` — same pattern as `BadgeSize`, `ButtonSize`, `StatusLightSize`
+- [x] `ActionGroup.base.ts`: `label` → `aria-label`, `disabled` propagation contract, child collection logic
+- [x] `ActionGroup.ts`: `compact`, `quiet`, `orientation`, `justified`, `size`, `staticColor`, child propagation; `FocusgroupNavigationController` wiring deferred to Phase 4; `delegatesFocus: true` preserved (see B8)
 - [ ] Drop `--mod-*` CSS custom properties; introduce `--swc-*` set after Phase 5 review
 
 #### 1st-gen deprecation notices
 
-- [ ] `@deprecated` JSDoc on `vertical` property in `sp-action-group`; runtime warn in existing `vertical` setter via `window.__swc.warn()`
+- [x] `@deprecated` JSDoc on `vertical`, `selects`, `selected`, `emphasized` in `sp-action-group`; `window.__swc.warn()` added to `selected` setter (existing setter) and to new getter/setter pairs for `vertical`, `selects`, and `emphasized` (following the `swc-button-group` pattern)
 
 #### Alignment checks
 
@@ -426,22 +426,23 @@ No `_lit-styles/` fragment needed — action-group renders only a slot; all layo
 
 #### Naming and semantics
 
-- [ ] Host always `role="group"`; never author-overridable; no `toolbar`, `radiogroup`, or other role
-- [ ] `aria-orientation` reflects `orientation` value; wired to `FocusgroupNavigationController` direction
-- [ ] `label` → `aria-label` on host; empty `label` removes `aria-label`
-- [ ] `swc-action-button` children stay `role="button"` only; no `role="radio"` or `role="checkbox"` assigned by action-group
-- [ ] Group `disabled`: host `aria-disabled="true"`, children `aria-disabled="true"`; children remain keyboard-reachable (SWC-621)
+- [x] Host always `role="group"`; never author-overridable; no `toolbar`, `radiogroup`, or other role
+- [x] `aria-orientation` reflects `orientation` value; wired to `FocusgroupNavigationController` direction
+- [x] `label` → `aria-label` on host; empty `label` removes `aria-label`
+- [x] `swc-action-button` children stay `role="button"` only; no `role="radio"` or `role="checkbox"` assigned by action-group
+- [x] Group `disabled`: host `aria-disabled="true"`, children `aria-disabled="true"`; children remain keyboard-reachable (SWC-621)
 
 #### State verification
 
-- [ ] Roving tabindex: exactly one child has `tabindex="0"`, others `tabindex="-1"`
-- [ ] Initial focus target is first selected enabled child, or first enabled child
-- [ ] Mouse click updates `tabindex="0"` to clicked item (SWC-250 fix; port `it.skip` test)
-- [ ] Focus ring visible on focused child; no z-index stacking hides indicator (SWC-1342 fix)
-- [ ] `change` fires after `selected` state is committed (SWC-889 fix)
-- [ ] `selected` removal does not throw console error (SWC-282 fix)
-- [ ] `swc-action-menu` in group: open menu; arrow inside; Escape returns focus to menu trigger; roving continues from trigger
-- [ ] `FormFieldMixin` not applied (SWC-1612 not applied)
+- [x] Roving tabindex: exactly one child has `tabindex="0"`, others `tabindex="-1"`
+- [x] Initial focus target is first enabled child (no selection concept in 2nd-gen)
+- [x] Mouse click updates `tabindex="0"` to clicked item (SWC-250 fix; port `it.skip` test)
+- [ ] Focus ring visible on focused child; no z-index stacking hides indicator (SWC-1342 fix) — Phase 5
+- [skip] `change` fires after `selected` state is committed (SWC-889 fix) — `selects`/`selected` dropped
+- [skip] `selected` removal does not throw console error (SWC-282 fix) — `selected` dropped
+- [ ] `swc-action-menu` in group: open menu; arrow inside; Escape returns focus to menu trigger; roving continues from trigger — Phase 6
+- [x] `skipDisabled: true` — individually disabled children are skipped in arrow navigation; group-level `disabled` propagates `aria-disabled` uniformly so per-item skip does not conflict
+- [x] `FormFieldMixin` not applied (SWC-1612 not applied)
 
 ### Testing
 
@@ -497,7 +498,7 @@ No `_lit-styles/` fragment needed — action-group renders only a slot; all layo
 
 Create these tickets before this migration PR closes. Link each to Epic SWC-2212.
 
-No deferred implementation tickets at this time.
+- **`swc-action-menu` `aria-disabled` forwarding (Phase 6).** When `swc-action-group` is disabled it propagates `aria-disabled="true"` to all slotted children. `swc-action-button` already forwards that host attribute to its inner `<button>` and applies disabled appearance via `:host([aria-disabled="true"])` CSS. `swc-action-menu` will need the same treatment: observe `aria-disabled` in its `attributeChangedCallback`, forward the value to its inner trigger element, and add matching CSS (including forced-colors system color overrides). See the comment in `ActionGroupBase.propagateDisabledToChildren()` and the `swc-action-button` implementation for the pattern to follow.
 
 ---