diff --git a/packages/ui/src/hooks/use-controlled-state.test.tsx b/packages/ui/src/hooks/use-controlled-state.test.tsx
deleted file mode 100644
index f5acded59..000000000
--- a/packages/ui/src/hooks/use-controlled-state.test.tsx
+++ /dev/null
@@ -1,78 +0,0 @@
-import { act, renderHook } from "@testing-library/react";
-import { describe, expect, it, vi } from "vitest";
-import { useControlledState } from "./use-controlled-state";
-
-describe("useControlledState", () => {
-	it("returns the defaultValue when uncontrolled", () => {
-		const { result } = renderHook(() => useControlledState({ defaultValue: 0 }));
-		expect(result.current[0]).toBe(0);
-	});
-
-	it("returns the value when controlled", () => {
-		const { result } = renderHook(() => useControlledState({ value: 42, defaultValue: 0 }));
-		expect(result.current[0]).toBe(42);
-	});
-
-	it("updates internal state when value prop changes (controlled)", () => {
-		const { result, rerender } = renderHook(({ value }: { value: number }) => useControlledState({ value }), {
-			initialProps: { value: 1 },
-		});
-
-		expect(result.current[0]).toBe(1);
-		rerender({ value: 2 });
-		expect(result.current[0]).toBe(2);
-	});
-
-	it("updates state via setter when uncontrolled", () => {
-		const { result } = renderHook(() => useControlledState<number>({ defaultValue: 0 }));
-		act(() => {
-			result.current[1](10);
-		});
-		expect(result.current[0]).toBe(10);
-	});
-
-	it("calls onChange when state is updated", () => {
-		const onChange = vi.fn();
-		const { result } = renderHook(() => useControlledState<string>({ defaultValue: "a", onChange }));
-
-		act(() => {
-			result.current[1]("b");
-		});
-
-		expect(onChange).toHaveBeenCalledWith("b");
-	});
-
-	it("forwards extra args to onChange", () => {
-		const onChange = vi.fn();
-		const { result } = renderHook(() => useControlledState<string, [number, boolean]>({ defaultValue: "a", onChange }));
-
-		act(() => {
-			result.current[1]("b", 42, true);
-		});
-
-		expect(onChange).toHaveBeenCalledWith("b", 42, true);
-	});
-
-	it("does not call onChange when value prop changes from outside", () => {
-		const onChange = vi.fn();
-		const { rerender } = renderHook(({ value }: { value: number }) => useControlledState<number>({ value, onChange }), {
-			initialProps: { value: 1 },
-		});
-
-		rerender({ value: 2 });
-		// onChange is only called via setState, not the controlled-value sync effect.
-		expect(onChange).not.toHaveBeenCalled();
-	});
-
-	it("returns the same setter reference when onChange is stable", () => {
-		const onChange = vi.fn();
-		const { result, rerender } = renderHook(
-			({ value }: { value: number }) => useControlledState<number>({ value, onChange }),
-			{ initialProps: { value: 1 } },
-		);
-
-		const initialSetter = result.current[1];
-		rerender({ value: 2 });
-		expect(result.current[1]).toBe(initialSetter);
-	});
-});
diff --git a/packages/ui/src/hooks/use-controlled-state.tsx b/packages/ui/src/hooks/use-controlled-state.tsx
deleted file mode 100644
index a118aaef0..000000000
--- a/packages/ui/src/hooks/use-controlled-state.tsx
+++ /dev/null
@@ -1,30 +0,0 @@
-import { useCallback, useState } from "react";
-
-interface CommonControlledStateProps<T> {
-	value?: T;
-	defaultValue?: T;
-}
-
-type UseControlledStateProps<T, Rest extends unknown[] = []> = CommonControlledStateProps<T> & {
-	onChange?: (value: T, ...args: Rest) => void;
-};
-
-export function useControlledState<T, Rest extends unknown[] = []>(
-	props: UseControlledStateProps<T, Rest>,
-): readonly [T, (next: T, ...args: Rest) => void] {
-	const { value, defaultValue, onChange } = props;
-	const isControlled = value !== undefined;
-
-	const [internalState, setInternalState] = useState<T>(value !== undefined ? value : (defaultValue as T));
-	const state = isControlled ? (value as T) : internalState;
-
-	const setState = useCallback(
-		(next: T, ...args: Rest) => {
-			if (!isControlled) setInternalState(next);
-			onChange?.(next, ...args);
-		},
-		[isControlled, onChange],
-	);
-
-	return [state, setState] as const;
-}