Function useCommandState

useCommandState<T>(
    initial: T,
    handlers: { [action: string]: (state: T, cmd: Command) => T },
    options?: UseCommandStateOptions,
): { state: Signal<T>; dispose: () => void }
useCommandState - create reactive state that updates via commands.

Auto-cleanup on Vue component unmount or scope disposal.
Type Parameters
- T
Parameters
- initial: T
- handlers: { [action: string]: (state: T, cmd: Command) => T }
- options: UseCommandStateOptions = {}
Returns { state: Signal<T>; dispose: () => void }
Example
```
// Immediate mode (default):
const { state } = useCommandState([], { cartAdd: (s, cmd) => [...s, cmd.target] });
```
Example
```
// Coalesced mode — batch writes for v-for lists:
const { state } = useCommandState([], { cartAdd: (s, cmd) => [...s, cmd.target] }, { coalesce: true });
```
- Defined in chamber.ts:525