diff --git a/stylesheets/_modules.scss b/stylesheets/_modules.scss
index f8a40ce57d..2b9ad72ac0 100644
--- a/stylesheets/_modules.scss
+++ b/stylesheets/_modules.scss
@@ -161,7 +161,7 @@
 }
 
 .module-message:hover .module-message__buttons,
-.module-message__buttons:has([data-state='open']) {
+.module-message__buttons:has([data-axo-contextmenu-state='open']) {
   opacity: 1;
 }
 
@@ -5046,7 +5046,7 @@ button.module-calling-participants-list__contact {
       }
 
       &:hover:not(:disabled, &--disabled, &--is-selected),
-      &[data-state='open'] {
+      &[data-axo-contextmenu-state='open'] {
         background-color: light-dark(
           variables.$color-gray-05,
           variables.$color-gray-75
diff --git a/stylesheets/components/Preferences.scss b/stylesheets/components/Preferences.scss
index 8be7e1e65b..c2e6cfe001 100644
--- a/stylesheets/components/Preferences.scss
+++ b/stylesheets/components/Preferences.scss
@@ -1099,7 +1099,7 @@ $secondary-text-color: light-dark(
 .Preferences__ChatFolders__ChatSelection__Item--Clickable {
   cursor: pointer;
   &:hover .Preferences__ChatFolders__ChatSelection__ItemContent,
-  .Preferences__ChatFolders__ChatSelection__ItemContent[data-state='open'] {
+  .Preferences__ChatFolders__ChatSelection__ItemContent[data-axo-contextmenu-state='open'] {
     background: light-dark(variables.$color-gray-02, variables.$color-gray-80);
   }
 }
diff --git a/ts/axo/AriaClickable.dom.tsx b/ts/axo/AriaClickable.dom.tsx
index f9aa7dab32..0d3057bcc3 100644
--- a/ts/axo/AriaClickable.dom.tsx
+++ b/ts/axo/AriaClickable.dom.tsx
@@ -1,17 +1,14 @@
 // Copyright 2025 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
-import React, {
-  createContext,
-  memo,
-  useCallback,
-  useContext,
-  useRef,
-  useState,
-} from 'react';
+import React, { memo, useCallback, useRef, useState } from 'react';
 import type { ReactNode, MouseEvent, FC } from 'react';
 import { useLayoutEffect } from '@react-aria/utils';
 import { tw } from './tw.dom.js';
 import { assert } from './_internal/assert.dom.js';
+import {
+  createStrictContext,
+  useStrictContext,
+} from './_internal/StrictContext.dom.js';
 
 const Namespace = 'AriaClickable';
 
@@ -51,8 +48,8 @@ export namespace AriaClickable {
 
   type TriggerStateUpdate = (state: TriggerState) => void;
 
-  const TriggerStateUpdateContext = createContext<TriggerStateUpdate | null>(
-    null
+  const TriggerStateUpdateContext = createStrictContext<TriggerStateUpdate>(
+    `${Namespace}.Root`
   );
 
   /**
@@ -174,13 +171,7 @@ export namespace AriaClickable {
    */
   export const HiddenTrigger: FC<HiddenTriggerProps> = memo(props => {
     const ref = useRef<HTMLButtonElement>(null);
-    const onTriggerStateUpdate = useContext(TriggerStateUpdateContext);
-
-    if (onTriggerStateUpdate == null) {
-      throw new Error(
-        `<${Namespace}.HiddenTrigger> must be wrapped with <${Namespace}.Root>`
-      );
-    }
+    const onTriggerStateUpdate = useStrictContext(TriggerStateUpdateContext);
 
     const onTriggerStateUpdateRef = useRef(onTriggerStateUpdate);
     useLayoutEffect(() => {
diff --git a/ts/axo/AxoBadge.dom.tsx b/ts/axo/AxoBadge.dom.tsx
index 4a0506b670..5155b5c29e 100644
--- a/ts/axo/AxoBadge.dom.tsx
+++ b/ts/axo/AxoBadge.dom.tsx
@@ -31,6 +31,7 @@ export namespace ExperimentalAxoBadge {
     'flex size-fit items-center justify-center-safe overflow-clip',
     'rounded-full font-semibold',
     'bg-color-fill-primary text-label-primary-on-color',
+    'forced-color-adjust-none forced-colors:bg-[Mark] forced-colors:text-[MarkText]',
     'select-none'
   );
 
diff --git a/ts/axo/AxoContextMenu.dom.tsx b/ts/axo/AxoContextMenu.dom.tsx
index 51a161d8a5..2c9467c2e4 100644
--- a/ts/axo/AxoContextMenu.dom.tsx
+++ b/ts/axo/AxoContextMenu.dom.tsx
@@ -1,6 +1,13 @@
 // Copyright 2025 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
-import React, { memo, useCallback, useEffect, useRef, useState } from 'react';
+import React, {
+  memo,
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from 'react';
 import { ContextMenu } from 'radix-ui';
 import type {
   FC,
@@ -12,6 +19,10 @@ import { AxoSymbol } from './AxoSymbol.dom.js';
 import { AxoBaseMenu } from './_internal/AxoBaseMenu.dom.js';
 import { tw } from './tw.dom.js';
 import { assert } from './_internal/assert.dom.js';
+import {
+  createStrictContext,
+  useStrictContext,
+} from './_internal/StrictContext.dom.js';
 
 const Namespace = 'AxoContextMenu';
 
@@ -55,6 +66,14 @@ const Namespace = 'AxoContextMenu';
  * ```
  */
 export namespace AxoContextMenu {
+  export type RootContextType = Readonly<{
+    open: boolean;
+  }>;
+
+  export const RootContext = createStrictContext<RootContextType>(
+    `${Namespace}.RootContext`
+  );
+
   /**
    * Component: <AxoContextMenu.Root>
    * --------------------------------
@@ -63,10 +82,27 @@ export namespace AxoContextMenu {
   export type RootProps = AxoBaseMenu.MenuRootProps;
 
   export const Root: FC<RootProps> = memo(props => {
+    const { onOpenChange } = props;
+    const [open, setOpen] = useState(false);
+
+    const handleOpenChange = useCallback(
+      (nextOpen: boolean) => {
+        setOpen(nextOpen);
+        onOpenChange?.(nextOpen);
+      },
+      [onOpenChange]
+    );
+
+    const context = useMemo(() => {
+      return { open };
+    }, [open]);
+
     return (
-      <ContextMenu.Root onOpenChange={props.onOpenChange}>
-        {props.children}
-      </ContextMenu.Root>
+      <RootContext.Provider value={context}>
+        <ContextMenu.Root onOpenChange={handleOpenChange}>
+          {props.children}
+        </ContextMenu.Root>
+      </RootContext.Provider>
     );
   });
 
@@ -125,6 +161,7 @@ export namespace AxoContextMenu {
   export type TriggerProps = AxoBaseMenu.MenuTriggerProps;
 
   export const Trigger: FC<TriggerProps> = memo(props => {
+    const context = useStrictContext(RootContext);
     const [disableCurrentEvent, setDisableCurrentEvent] = useState(false);
 
     const handleContextMenuCapture = useCallback(
@@ -164,7 +201,8 @@ export namespace AxoContextMenu {
         onContextMenu={handleContextMenu}
         onKeyDown={handleKeyDown}
         disabled={disableCurrentEvent || props.disabled}
-        data-axo-context-menu-trigger
+        data-axo-contextmenu-trigger
+        data-axo-contextmenu-state={context.open ? 'open' : 'closed'}
       >
         {props.children}
       </ContextMenu.Trigger>
@@ -176,7 +214,7 @@ export namespace AxoContextMenu {
   export function useAxoContextMenuOutsideKeyboardTrigger(): KeyboardEventHandler {
     return useContextMenuTriggerKeyboardEventHandler(event => {
       return assert(
-        event.currentTarget.querySelector('[data-axo-context-menu-trigger]'),
+        event.currentTarget.querySelector('[data-axo-contextmenu-trigger]'),
         `Couldn't find <${Namespace}.Trigger> element, did you forget to pass all html props through?`
       );
     });
diff --git a/ts/axo/AxoDropdownMenu.dom.tsx b/ts/axo/AxoDropdownMenu.dom.tsx
index 78efc3227c..1b04a3f3f2 100644
--- a/ts/axo/AxoDropdownMenu.dom.tsx
+++ b/ts/axo/AxoDropdownMenu.dom.tsx
@@ -303,8 +303,7 @@ export namespace AxoDropdownMenu {
     const descriptionId = useId();
 
     const { labelRef, descriptionRef } = useAriaLabellingContext(
-      `<${Namespace}.Header>`,
-      `<${Namespace}.Content/SubContent>`
+      `${Namespace}.Content/SubContent`
     );
 
     return (
diff --git a/ts/axo/AxoMenuBuilder.dom.tsx b/ts/axo/AxoMenuBuilder.dom.tsx
index c6d815df68..7694313175 100644
--- a/ts/axo/AxoMenuBuilder.dom.tsx
+++ b/ts/axo/AxoMenuBuilder.dom.tsx
@@ -2,24 +2,22 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import type { FC } from 'react';
-import React, { createContext, memo, useContext } from 'react';
+import React, { memo } from 'react';
 import type { AxoBaseMenu } from './_internal/AxoBaseMenu.dom.js';
-import { assert, unreachable } from './_internal/assert.dom.js';
+import { unreachable } from './_internal/assert.dom.js';
 import { AxoDropdownMenu } from './AxoDropdownMenu.dom.js';
 import { AxoContextMenu } from './AxoContextMenu.dom.js';
+import {
+  createStrictContext,
+  useStrictContext,
+} from './_internal/StrictContext.dom.js';
 
 const Namespace = 'AxoMenuBuilder';
 
 export namespace AxoMenuBuilder {
   export type Renderer = 'AxoDropdownMenu' | 'AxoContextMenu';
 
-  const MenuBuilderContext = createContext<Renderer | null>(null);
-
-  // eslint-disable-next-line no-inner-declarations
-  function useMenuBuilderContext(): Renderer {
-    const context = useContext(MenuBuilderContext);
-    return assert(context, `Must be wrapped with <${Namespace}.Root>`);
-  }
+  const MenuBuilderContext = createStrictContext<Renderer>(`${Namespace}.Root`);
 
   export type RootProps = AxoBaseMenu.MenuRootProps &
     Readonly<{
@@ -48,7 +46,7 @@ export namespace AxoMenuBuilder {
   Root.displayName = `${Namespace}.Root`;
 
   export const Trigger: FC<AxoBaseMenu.MenuTriggerProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Trigger {...props} />;
     }
@@ -61,7 +59,7 @@ export namespace AxoMenuBuilder {
   Trigger.displayName = `${Namespace}.Trigger`;
 
   export const Content: FC<AxoBaseMenu.MenuContentProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Content {...props} />;
     }
@@ -74,7 +72,7 @@ export namespace AxoMenuBuilder {
   Content.displayName = `${Namespace}.Content`;
 
   export const Item: FC<AxoBaseMenu.MenuItemProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Item {...props} />;
     }
@@ -87,7 +85,7 @@ export namespace AxoMenuBuilder {
   Item.displayName = `${Namespace}.Item`;
 
   export const Group: FC<AxoBaseMenu.MenuGroupProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Group {...props} />;
     }
@@ -100,7 +98,7 @@ export namespace AxoMenuBuilder {
   Group.displayName = `${Namespace}.Group`;
 
   export const Label: FC<AxoBaseMenu.MenuLabelProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Label {...props} />;
     }
@@ -113,7 +111,7 @@ export namespace AxoMenuBuilder {
   Label.displayName = `${Namespace}.Label`;
 
   export const Separator: FC<AxoBaseMenu.MenuSeparatorProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Separator {...props} />;
     }
@@ -127,7 +125,7 @@ export namespace AxoMenuBuilder {
 
   export const CheckboxItem: FC<AxoBaseMenu.MenuCheckboxItemProps> = memo(
     props => {
-      const renderer = useMenuBuilderContext();
+      const renderer = useStrictContext(MenuBuilderContext);
       if (renderer === 'AxoDropdownMenu') {
         return <AxoDropdownMenu.CheckboxItem {...props} />;
       }
@@ -141,7 +139,7 @@ export namespace AxoMenuBuilder {
   CheckboxItem.displayName = `${Namespace}.CheckboxItem`;
 
   export const RadioGroup: FC<AxoBaseMenu.MenuRadioGroupProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.RadioGroup {...props} />;
     }
@@ -154,7 +152,7 @@ export namespace AxoMenuBuilder {
   RadioGroup.displayName = `${Namespace}.RadioGroup`;
 
   export const RadioItem: FC<AxoBaseMenu.MenuRadioItemProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.RadioItem {...props} />;
     }
@@ -167,7 +165,7 @@ export namespace AxoMenuBuilder {
   RadioItem.displayName = `${Namespace}.RadioItem`;
 
   export const Sub: FC<AxoBaseMenu.MenuSubProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.Sub {...props} />;
     }
@@ -180,7 +178,7 @@ export namespace AxoMenuBuilder {
   Sub.displayName = `${Namespace}.Sub`;
 
   export const SubTrigger: FC<AxoBaseMenu.MenuSubTriggerProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.SubTrigger {...props} />;
     }
@@ -193,7 +191,7 @@ export namespace AxoMenuBuilder {
   SubTrigger.displayName = `${Namespace}.SubTrigger`;
 
   export const SubContent: FC<AxoBaseMenu.MenuSubContentProps> = memo(props => {
-    const renderer = useMenuBuilderContext();
+    const renderer = useStrictContext(MenuBuilderContext);
     if (renderer === 'AxoDropdownMenu') {
       return <AxoDropdownMenu.SubContent {...props} />;
     }
diff --git a/ts/axo/AxoScrollArea.dom.tsx b/ts/axo/AxoScrollArea.dom.tsx
index 143b625978..467f7cc733 100644
--- a/ts/axo/AxoScrollArea.dom.tsx
+++ b/ts/axo/AxoScrollArea.dom.tsx
@@ -1,10 +1,13 @@
 // Copyright 2025 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
-import React, { createContext, memo, useContext, useMemo } from 'react';
+import React, { memo, useMemo } from 'react';
 import type { CSSProperties, FC, ReactNode } from 'react';
 import type { TailwindStyles } from './tw.dom.js';
 import { tw } from './tw.dom.js';
-import { assert } from './_internal/assert.dom.js';
+import {
+  createStrictContext,
+  useStrictContext,
+} from './_internal/StrictContext.dom.js';
 
 const Namespace = 'AxoScrollArea';
 
@@ -15,13 +18,10 @@ const AXO_SCROLL_AREA_TIMELINE_HORIZONTAL =
 type AxoScrollAreaOrientation = 'vertical' | 'horizontal' | 'both';
 
 const AxoScrollAreaOrientationContext =
-  createContext<AxoScrollAreaOrientation | null>(null);
+  createStrictContext<AxoScrollAreaOrientation>(`${Namespace}.Root`);
 
 export function useAxoScrollAreaOrientation(): AxoScrollArea.Orientation {
-  return assert(
-    useContext(AxoScrollAreaOrientationContext),
-    `Must be wrapped with <${Namespace}.Root>`
-  );
+  return useStrictContext(AxoScrollAreaOrientationContext);
 }
 
 /**
@@ -74,15 +74,9 @@ export namespace AxoScrollArea {
     scrollBehavior: ScrollBehavior;
   }>;
 
-  const ScrollAreaConfigContext = createContext<ScrollAreaConfig | null>(null);
-
-  // eslint-disable-next-line no-inner-declarations
-  function useAxoScrollAreaConfig(): ScrollAreaConfig {
-    return assert(
-      useContext(ScrollAreaConfigContext),
-      `Must be wrapped with <${Namespace}.Root>`
-    );
-  }
+  const ScrollAreaConfigContext = createStrictContext<ScrollAreaConfig>(
+    `${Namespace}.Root`
+  );
 
   /**
    * Component: <AxoScrollArea.Root>
@@ -221,7 +215,7 @@ export namespace AxoScrollArea {
       scrollbarGutter,
       scrollbarVisibility,
       scrollBehavior,
-    } = useAxoScrollAreaConfig();
+    } = useStrictContext(ScrollAreaConfigContext);
 
     const style = useMemo((): CSSProperties => {
       const hasVerticalScrollbar = orientation !== 'horizontal';
@@ -376,7 +370,7 @@ export namespace AxoScrollArea {
   export const Hint: FC<HintProps> = memo(props => {
     const { edge, animationStartOffset = 1, animationEndOffset = 20 } = props;
     const orientation = useAxoScrollAreaOrientation();
-    const { scrollbarWidth } = useAxoScrollAreaConfig();
+    const { scrollbarWidth } = useStrictContext(ScrollAreaConfigContext);
 
     const style = useMemo((): CSSProperties => {
       const isVerticalEdge = edge === 'top' || edge === 'bottom';
@@ -445,7 +439,7 @@ export namespace AxoScrollArea {
     } = props;
 
     const orientation = useAxoScrollAreaOrientation();
-    const { scrollbarWidth } = useAxoScrollAreaConfig();
+    const { scrollbarWidth } = useStrictContext(ScrollAreaConfigContext);
 
     const style = useMemo(() => {
       const hasVerticalScrollbar = orientation !== 'horizontal';
diff --git a/ts/axo/_internal/AriaLabellingContext.dom.tsx b/ts/axo/_internal/AriaLabellingContext.dom.tsx
index c455214147..9c49c834ea 100644
--- a/ts/axo/_internal/AriaLabellingContext.dom.tsx
+++ b/ts/axo/_internal/AriaLabellingContext.dom.tsx
@@ -2,16 +2,16 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import type { RefCallback } from 'react';
-import { createContext, useContext, useMemo, useState } from 'react';
-import { assert } from './assert.dom.js';
+import { useMemo, useState } from 'react';
+import { createStrictContext, useStrictContext } from './StrictContext.dom.js';
 
 type AriaLabellingContextType = Readonly<{
   labelRef: RefCallback<HTMLElement>;
   descriptionRef: RefCallback<HTMLElement>;
 }>;
 
-const AriaLabellingContext = createContext<AriaLabellingContextType | null>(
-  null
+const AriaLabellingContext = createStrictContext<AriaLabellingContextType>(
+  'AriaLabellingContext.Provider'
 );
 
 export type CreateAriaLabellingContextResult = Readonly<{
@@ -42,11 +42,10 @@ export function useCreateAriaLabellingContext(): CreateAriaLabellingContextResul
 export const AriaLabellingProvider = AriaLabellingContext.Provider;
 
 export function useAriaLabellingContext(
-  componentName: string,
   providerName: string
 ): AriaLabellingContextType {
-  return assert(
-    useContext(AriaLabellingContext),
-    `${componentName} must be wrapped with a ${providerName}`
+  return useStrictContext(
+    AriaLabellingContext,
+    `Must be wrapped with a <${providerName}>`
   );
 }
diff --git a/ts/axo/_internal/AxoBaseSegmentedControl.dom.tsx b/ts/axo/_internal/AxoBaseSegmentedControl.dom.tsx
index ab745dbf02..421ce8d6a4 100644
--- a/ts/axo/_internal/AxoBaseSegmentedControl.dom.tsx
+++ b/ts/axo/_internal/AxoBaseSegmentedControl.dom.tsx
@@ -8,19 +8,13 @@ import type {
   HTMLAttributes,
   ReactNode,
 } from 'react';
-import React, {
-  createContext,
-  forwardRef,
-  memo,
-  useContext,
-  useId,
-  useMemo,
-} from 'react';
+import React, { forwardRef, memo, useId, useMemo } from 'react';
 import type { Transition } from 'framer-motion';
 import { motion } from 'framer-motion';
 import type { TailwindStyles } from '../tw.dom.js';
 import { tw } from '../tw.dom.js';
 import { ExperimentalAxoBadge } from '../AxoBadge.dom.js';
+import { createStrictContext, useStrictContext } from './StrictContext.dom.js';
 
 const Namespace = 'AxoBaseSegmentedControl';
 
@@ -54,18 +48,7 @@ export namespace ExperimentalAxoBaseSegmentedControl {
     itemWidth: ItemWidth;
   }>;
 
-  const RootContext = createContext<RootContextType | null>(null);
-
-  // eslint-disable-next-line no-inner-declarations
-  function useRootContext(componentName: string): RootContextType {
-    const context = useContext(RootContext);
-    if (context == null) {
-      throw new Error(
-        `<${Namespace}.${componentName}> must be wrapped with <${Namespace}.Root>`
-      );
-    }
-    return context;
-  }
+  const RootContext = createStrictContext<RootContextType>(`${Namespace}.Root`);
 
   type VariantConfig = {
     rootStyles: TailwindStyles;
@@ -81,7 +64,7 @@ export namespace ExperimentalAxoBaseSegmentedControl {
     ),
     indicatorStyles: tw(
       'pointer-events-none absolute inset-0 z-10 rounded-full',
-      'forced-colors:bg-[Highlight]'
+      'forced-colors:bg-[SelectedItem]'
     ),
   };
 
@@ -167,7 +150,7 @@ export namespace ExperimentalAxoBaseSegmentedControl {
     forwardRef((props, ref: ForwardedRef<HTMLButtonElement>) => {
       const { value, ...rest } = props;
 
-      const context = useRootContext('Item');
+      const context = useStrictContext(RootContext);
       const config = Variants[context.variant];
       const itemWidthStyles = ItemWidths[context.itemWidth];
 
@@ -189,12 +172,18 @@ export namespace ExperimentalAxoBaseSegmentedControl {
           type="button"
           {...rest}
           className={tw(
-            'group relative flex min-w-0 items-center justify-center px-3 py-[5px]',
+            'relative flex min-w-0 items-center justify-center px-3 py-[5px]',
             'cursor-pointer rounded-full type-body-medium font-medium text-label-primary',
             'outline-border-focused not-forced-colors:outline-0 not-forced-colors:focused:outline-[2.5px]',
             'forced-colors:bg-[ButtonFace] forced-colors:text-[ButtonText]',
+            'forced-colors:data-[axo-contextmenu-state=open]:text-[HighlightText]',
             itemWidthStyles,
-            isSelected && tw('forced-colors:text-[HighlightText]')
+            isSelected && tw('forced-colors:text-[SelectedItemText]'),
+            !isSelected &&
+              tw(
+                'data-[axo-contextmenu-state=open]:bg-fill-secondary',
+                'forced-colors:data-[axo-contextmenu-state=open]:bg-[Highlight]'
+              )
           )}
         >
           {props.children}
diff --git a/ts/axo/_internal/StrictContext.dom.tsx b/ts/axo/_internal/StrictContext.dom.tsx
new file mode 100644
index 0000000000..ed5c312796
--- /dev/null
+++ b/ts/axo/_internal/StrictContext.dom.tsx
@@ -0,0 +1,29 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { Context } from 'react';
+import { createContext, useContext } from 'react';
+
+const EMPTY: unique symbol = Symbol('STRICT_CONTEXT_EMPTY');
+const WRAPPER: unique symbol = Symbol('STRICT_CONTEXT_MESSAGE');
+
+export type StrictContext<T> = Context<T | typeof EMPTY> & {
+  [WRAPPER]: string;
+};
+
+export function createStrictContext<T>(wrapper: string): StrictContext<T> {
+  return Object.assign(createContext<T | typeof EMPTY>(EMPTY), {
+    [WRAPPER]: wrapper,
+  });
+}
+
+export function useStrictContext<T>(
+  context: StrictContext<T>,
+  message?: string
+): T {
+  const value = useContext(context);
+  if (value === EMPTY) {
+    throw new Error(message ?? `Must be wrapped with <${context[WRAPPER]}>`);
+  }
+  return value;
+}