AnyStream

Erased stream handle useful as a parameter type for helpers and wrapper components that pass a stream through to selector hooks (useMessages, useChannel, …) without reading values directly.

Any fully-typed UseStreamReturn<T, I, C> is assignable to AnyStream. Widening the three generic slots to any is not enough on its own: members whose types are computed from T in covariant positions don't collapse to a top type under any. In particular toolCalls: InferToolCalls<any>[] resolves to AssembledToolCall<string, …, never>[] — the never output slot is narrower than a concrete handle's AssembledToolCall<…, unknown>[], so the concrete handle fails to assign and every useToolCalls(stream) call would need an as AnyStream cast. values / ~stateType (computed via InferStateType<any>) have the same hazard. We override those members with their widest forms so the erased handle is a true supertype of every concrete UseStreamReturn.