diff --git a/.changeset/pagination-interruptible-button-guard.md b/.changeset/pagination-interruptible-button-guard.md
new file mode 100644
index 0000000000000..ab285b5850455
--- /dev/null
+++ b/.changeset/pagination-interruptible-button-guard.md
@@ -0,0 +1,6 @@
+---
+'@astryxdesign/core': patch
+---
+
+[fix] `Pagination`'s `changeAction` is now interruptible — page changes run in a transition with optimistic page state, so rapid prev/next clicks advance through pages instead of being dropped. `Button`'s `clickAction` keeps its single-fire guard.
+@cixzhang
diff --git a/packages/core/src/Button/Button.test.tsx b/packages/core/src/Button/Button.test.tsx
index 98f3d8c960e5b..6b70636c5b8d7 100644
--- a/packages/core/src/Button/Button.test.tsx
+++ b/packages/core/src/Button/Button.test.tsx
@@ -10,7 +10,7 @@
  */
 
 import {describe, it, expect, vi} from 'vitest';
-import {render, screen} from '@testing-library/react';
+import {render, screen, fireEvent, act} from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import {Button} from './Button';
 import {Badge} from '../Badge/Badge';
@@ -228,11 +228,7 @@ describe('Button', () => {
       order.push('clickAction');
     });
     render(
-      <Button
-        label="Test"
-        onClick={handleClick}
-        clickAction={handleAction}
-      />,
+      <Button label="Test" onClick={handleClick} clickAction={handleAction} />,
     );
 
     await user.click(screen.getByRole('button'));
@@ -246,11 +242,7 @@ describe('Button', () => {
     const handleClick = vi.fn((e: React.MouseEvent) => e.preventDefault());
     const handleAction = vi.fn();
     render(
-      <Button
-        label="Test"
-        onClick={handleClick}
-        clickAction={handleAction}
-      />,
+      <Button label="Test" onClick={handleClick} clickAction={handleAction} />,
     );
 
     await user.click(screen.getByRole('button'));
@@ -258,6 +250,29 @@ describe('Button', () => {
     expect(handleAction).not.toHaveBeenCalled();
   });
 
+  it('fires clickAction once on a fast double-click (no double-submit)', async () => {
+    let resolveAction: (() => void) | undefined;
+    const handleAction = vi.fn(
+      async () =>
+        new Promise<void>(resolve => {
+          resolveAction = resolve;
+        }),
+    );
+    render(<Button label="Pay" clickAction={handleAction} />);
+
+    const button = screen.getByRole('button');
+    await act(async () => {
+      fireEvent.click(button);
+      fireEvent.click(button);
+    });
+    expect(handleAction).toHaveBeenCalledTimes(1);
+
+    await act(async () => {
+      resolveAction?.();
+      await Promise.resolve();
+    });
+  });
+
   // type/name/value/form props
   it('defaults type to button', () => {
     render(<Button label="Test" />);
diff --git a/packages/core/src/Button/Button.tsx b/packages/core/src/Button/Button.tsx
index 4a599cf337275..83fcb86238517 100644
--- a/packages/core/src/Button/Button.tsx
+++ b/packages/core/src/Button/Button.tsx
@@ -513,6 +513,8 @@ export function Button({
   const buttonGroup = useButtonGroup();
 
   const [isPending, startTransition] = useTransition();
+  // clickAction is fire-once (submit/save/pay), so a same-tick double-click must
+  // dedupe — which neither isPending nor useOptimistic do. Hence the ref guard.
   const actionInFlightRef = useRef(false);
   const isLoadingState = isLoading || isPending;
   const groupDisabled = buttonGroup?.isDisabled ?? false;
diff --git a/packages/core/src/Pagination/Pagination.test.tsx b/packages/core/src/Pagination/Pagination.test.tsx
index 1aa20970aaa8e..6a0cc3e3ad6c2 100644
--- a/packages/core/src/Pagination/Pagination.test.tsx
+++ b/packages/core/src/Pagination/Pagination.test.tsx
@@ -10,7 +10,7 @@
  */
 
 import {describe, it, expect, vi} from 'vitest';
-import {render, screen, within} from '@testing-library/react';
+import {render, screen, within, fireEvent, act} from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import {Pagination, generatePageRange} from './Pagination';
 
@@ -346,6 +346,140 @@ describe('Pagination', () => {
     });
   });
 
+  // ---------------------------------------------------------------------------
+  // changeAction (interruptible, optimistic)
+  // ---------------------------------------------------------------------------
+
+  describe('changeAction', () => {
+    it('fires onChange then changeAction with the new page', async () => {
+      const user = userEvent.setup();
+      const order: string[] = [];
+      const onChange = vi.fn(() => order.push('onChange'));
+      const changeAction = vi.fn(() => {
+        order.push('changeAction');
+      });
+      render(
+        <Pagination
+          page={1}
+          onChange={onChange}
+          changeAction={changeAction}
+          totalPages={5}
+        />,
+      );
+      await user.click(screen.getByRole('button', {name: 'Go to next page'}));
+      expect(onChange).toHaveBeenCalledWith(2);
+      expect(changeAction).toHaveBeenCalledWith(2);
+      expect(order).toEqual(['onChange', 'changeAction']);
+    });
+
+    it('shows the optimistic page while changeAction is pending', async () => {
+      const user = userEvent.setup();
+      let resolveAction: (() => void) | undefined;
+      const changeAction = vi.fn(
+        async () =>
+          new Promise<void>(resolve => {
+            resolveAction = resolve;
+          }),
+      );
+      render(
+        <Pagination
+          page={1}
+          onChange={() => {}}
+          changeAction={changeAction}
+          totalPages={5}
+          variant="compact"
+        />,
+      );
+
+      // The committed `page` prop stays at 1, but the indicator optimistically
+      // reflects the page being navigated to.
+      await user.click(screen.getByRole('button', {name: 'Go to next page'}));
+      expect(changeAction).toHaveBeenCalledWith(2);
+      expect(screen.getByText('Page 2 of 5')).toBeInTheDocument();
+
+      await act(async () => {
+        resolveAction?.();
+        await Promise.resolve();
+      });
+    });
+
+    it('interrupts an in-flight action on rapid next clicks', async () => {
+      // Each click derives its target from the optimistic page, so clicking
+      // next twice before the action settles advances 1 -> 2 -> 3 instead of
+      // being dropped by a re-entry guard.
+      const resolvers: (() => void)[] = [];
+      const changeAction = vi.fn(
+        async () =>
+          new Promise<void>(resolve => {
+            resolvers.push(resolve);
+          }),
+      );
+      render(
+        <Pagination
+          page={1}
+          onChange={() => {}}
+          changeAction={changeAction}
+          totalPages={5}
+          variant="compact"
+        />,
+      );
+
+      const next = screen.getByRole('button', {name: 'Go to next page'});
+      await act(async () => {
+        fireEvent.click(next);
+      });
+      expect(screen.getByText('Page 2 of 5')).toBeInTheDocument();
+      await act(async () => {
+        fireEvent.click(next);
+      });
+      expect(screen.getByText('Page 3 of 5')).toBeInTheDocument();
+
+      expect(changeAction).toHaveBeenCalledTimes(2);
+      expect(changeAction).toHaveBeenNthCalledWith(1, 2);
+      expect(changeAction).toHaveBeenNthCalledWith(2, 3);
+
+      await act(async () => {
+        resolvers.forEach(resolve => resolve());
+        await Promise.resolve();
+      });
+    });
+
+    it('supports a synchronous changeAction', async () => {
+      const user = userEvent.setup();
+      const changeAction = vi.fn((_page: number) => {});
+      const onChange = vi.fn();
+      render(
+        <Pagination
+          page={2}
+          onChange={onChange}
+          changeAction={changeAction}
+          totalPages={5}
+        />,
+      );
+      await user.click(
+        screen.getByRole('button', {name: 'Go to previous page'}),
+      );
+      expect(onChange).toHaveBeenCalledWith(1);
+      expect(changeAction).toHaveBeenCalledWith(1);
+    });
+
+    it('does not fire changeAction when disabled', async () => {
+      const user = userEvent.setup();
+      const changeAction = vi.fn();
+      render(
+        <Pagination
+          page={1}
+          onChange={() => {}}
+          changeAction={changeAction}
+          totalPages={5}
+          isDisabled
+        />,
+      );
+      await user.click(screen.getByRole('button', {name: 'Go to next page'}));
+      expect(changeAction).not.toHaveBeenCalled();
+    });
+  });
+
   // ---------------------------------------------------------------------------
   // Boundary states
   // ---------------------------------------------------------------------------
@@ -459,12 +593,7 @@ describe('Pagination', () => {
   describe('disabled state', () => {
     it('disables all page buttons when isDisabled', () => {
       render(
-        <Pagination
-          page={3}
-          onChange={() => {}}
-          totalPages={5}
-          isDisabled
-        />,
+        <Pagination page={3} onChange={() => {}} totalPages={5} isDisabled />,
       );
       expect(
         screen.getByRole('button', {name: 'Go to previous page'}),
@@ -480,12 +609,7 @@ describe('Pagination', () => {
       const user = userEvent.setup();
       const onChange = vi.fn();
       render(
-        <Pagination
-          page={3}
-          onChange={onChange}
-          totalPages={5}
-          isDisabled
-        />,
+        <Pagination page={3} onChange={onChange} totalPages={5} isDisabled />,
       );
       // Disabled buttons can't be clicked
       await user.click(screen.getByRole('button', {name: 'Go to page 1'}));
diff --git a/packages/core/src/Pagination/Pagination.tsx b/packages/core/src/Pagination/Pagination.tsx
index 6f3f68e0709db..3885ffdb603f4 100644
--- a/packages/core/src/Pagination/Pagination.tsx
+++ b/packages/core/src/Pagination/Pagination.tsx
@@ -19,7 +19,7 @@
  *   label, data-testid, xstyle
  */
 
-import {useTransition} from 'react';
+import {useOptimistic, useTransition} from 'react';
 import * as stylex from '@stylexjs/stylex';
 import {
   colorVars,
@@ -349,16 +349,22 @@ export function Pagination({
   style,
   ref,
 }: PaginationProps) {
-  const [isPending, startTransition] = useTransition();
+  const [, startTransition] = useTransition();
+
+  // Track the page optimistically so rapid prev/next clicks advance from the
+  // in-flight target instead of stalling on the last committed page.
+  const [optimisticPage, setOptimisticPage] = useOptimistic(page);
 
   // Compute pagination state
   const computedTotalPages =
     totalPagesProp ??
     (totalItems != null ? Math.ceil(totalItems / pageSize) : undefined);
 
-  const hasPrevious = page > 1;
+  const hasPrevious = optimisticPage > 1;
   const hasNext =
-    computedTotalPages != null ? page < computedTotalPages : (hasMore ?? false);
+    computedTotalPages != null
+      ? optimisticPage < computedTotalPages
+      : (hasMore ?? false);
 
   // Return null for empty state
   if (totalItems != null && totalItems <= 0) {
@@ -368,48 +374,47 @@ export function Pagination({
     return null;
   }
 
+  // Interruptible: re-clicking before the transition settles starts a fresh one
+  // with the next optimistic page rather than being dropped, so there is no
+  // re-entry guard.
   const handlePageChange = (newPage: number) => {
-    if (isDisabled || isPending) {
+    if (isDisabled) {
       return;
     }
+    // Keep onChange urgent so controlled page state updates in the same commit
+    // as the click; only the optimistic indicator and changeAction defer.
     onChange(newPage);
-    if (changeAction) {
-      startTransition(async () => {
-        await changeAction(newPage);
-      });
-    }
+    startTransition(async () => {
+      setOptimisticPage(newPage);
+      await changeAction?.(newPage);
+    });
   };
 
   const handlePrevious = () => {
     if (hasPrevious) {
-      handlePageChange(page - 1);
+      handlePageChange(optimisticPage - 1);
     }
   };
 
   const handleNext = () => {
     if (hasNext) {
-      handlePageChange(page + 1);
+      handlePageChange(optimisticPage + 1);
     }
   };
 
   const handlePageSizeChange = (value: string) => {
     const newSize = Number(value);
     onPageSizeChange?.(newSize);
-    // Reset to page 1 when page size changes
-    onChange(1);
-    if (changeAction) {
-      startTransition(async () => {
-        await changeAction(1);
-      });
-    }
+    // Reset to page 1 when page size changes.
+    handlePageChange(1);
   };
 
   // Item range for count display
-  const rangeStart = (page - 1) * pageSize + 1;
+  const rangeStart = (optimisticPage - 1) * pageSize + 1;
   const rangeEnd =
     totalItems != null
-      ? Math.min(page * pageSize, totalItems)
-      : page * pageSize;
+      ? Math.min(optimisticPage * pageSize, totalItems)
+      : optimisticPage * pageSize;
 
   const buttonSize = size === 'sm' ? 'sm' : 'md';
   const isSm = size === 'sm';
@@ -421,7 +426,7 @@ export function Pagination({
           return null;
         }
         const pageRange = generatePageRange(
-          page,
+          optimisticPage,
           computedTotalPages,
           siblingCount,
         );
@@ -443,7 +448,7 @@ export function Pagination({
                   </span>
                 );
               }
-              const isActive = item === page;
+              const isActive = item === optimisticPage;
               return (
                 <Button
                   key={item}
@@ -483,7 +488,7 @@ export function Pagination({
         return (
           <span {...stylex.props(styles.infoText)}>
             <Text type="body" size="sm" color="secondary">
-              {`Page ${page} of ${computedTotalPages}`}
+              {`Page ${optimisticPage} of ${computedTotalPages}`}
             </Text>
           </span>
         );
@@ -503,18 +508,18 @@ export function Pagination({
                 key={i + 1}
                 type="button"
                 aria-label={`Go to page ${i + 1}`}
-                aria-current={i + 1 === page ? 'page' : undefined}
+                aria-current={i + 1 === optimisticPage ? 'page' : undefined}
                 onClick={() => handlePageChange(i + 1)}
                 disabled={isDisabled}
                 {...mergeProps(
                   themeProps('pagination-dot', {
-                    active: i + 1 === page ? 'active' : null,
+                    active: i + 1 === optimisticPage ? 'active' : null,
                     size,
                   }),
                   stylex.props(
                     styles.dot,
                     isSm && styles.dotSm,
-                    i + 1 === page && styles.dotActive,
+                    i + 1 === optimisticPage && styles.dotActive,
                     isDisabled && styles.dotDisabled,
                   ),
                 )}