Type Alias RequestInit<R, F>`Beta`

RequestInit: Slot<"params", PathParams<R>> & Slot<
    "query",
    Context.QueryParams<R>,
> & { query?: { format?: F } } & Slot<"headers", HeaderParams<R>> & (
    [Body<R>] extends [never] ? { body?: never } : { body: Body<R> }
) & { signal?: AbortSignal; tag?: string }

The second argument of context.request: the route's path parameters, query, headers and body, each typed from the spec, plus signal and tag.