// Commands
public virtual async Task <ChatMessage> Post(
IChatService.PostCommand command, CancellationToken cancellationToken = default)
{
var(text, session) = command;
var context = CommandContext.GetCurrent();
if (Computed.IsInvalidating())
{
_ = PseudoGetAnyChatTail();
return(default !);
public Task <ChatMessage> Post([FromBody] IChatService.PostCommand command, CancellationToken cancellationToken = default) => _chat.Post(command.UseDefaultSession(_sessionResolver), cancellationToken);