export type SessionChannelShape = {
    in?: unknown;
    out?: unknown;
};
/**
 * A typed declaration of a named Session channel. The channel analogue of
 * `Task<TId, TIn, TOut>`: `TName` captures the channel's literal name and
 * `TShape` its per-direction record types. `__shape` is a phantom carrier
 * for `TShape` and is never read at runtime.
 */
export type SessionChannel<TName extends string = string, TShape extends SessionChannelShape = SessionChannelShape> = {
    readonly name: TName;
    readonly __shape?: TShape;
};
export type AnySessionChannel = SessionChannel<string, SessionChannelShape>;
/** Extract a channel's literal name, the analogue of `TaskIdentifier`. */
export type SessionChannelName<C extends AnySessionChannel> = C extends SessionChannel<infer N, any> ? N : never;
/** Extract the `.out` record type, the analogue of `TaskOutput`. */
export type SessionChannelOut<C extends AnySessionChannel> = C extends SessionChannel<any, infer S> ? (S extends {
    out: infer O;
} ? O : unknown) : never;
/** Extract the `.in` record type, the analogue of `TaskPayload`. */
export type SessionChannelIn<C extends AnySessionChannel> = C extends SessionChannel<any, infer S> ? (S extends {
    in: infer I;
} ? I : unknown) : never;