<b>Character State:</b>
/select [<i>NAME</i>] — Select the active character for the user who is asking.
/show|stat — Display a summary of the active character's statistics.
/talk — Display the set of common languages for all the active characters selected in the conversation.
/heal <i>HP</i> — Restore <i>HP</i> hit points up to the maximum of the active character. 
/hurt|damage <i>HP</i> [, <i>DAMAGE</i>] — Deal <i>HP</i> damage to the active character. If a damage type is specified, the character's defenses may apply.
/bolster <i>HP</i> — Add temporary hit points to the active character.
/rest[ore] — Restore hit points to maximum and remove temporary hit points from the active character.
/gain <i>GP</i> — Add an amount of currency to the active character.
/spend <i>GP</i> — Remove an amount of currency to the active character.

<b>Hit Points:</b>
The <i>HP</i> argument to the health management commands may be a dice roll specification or a constant non-negative integer.

          .Append("<b>").Append(chr.CurrentHitPoints).Append("</b>")
        |> ignore
        if chr.TemporaryHitPoints > 0 then
          buffer.Append(" + ").Append(chr.TemporaryHitPoints) |> ignore
        buffer.Append(" / ").Append(chr.MaxHitPoints) |> ignore
        return Markup (buffer.ToString(), List.empty)
          
      | ["/bolster"; hp] ->
        let chr = selectedCharacter user
        let hp =
          match Dice.tryParse hp with
          | Some dice -> lock random (fun () -> Dice.simulate random dice)
          | None      -> int hp
        chr.AddTemporaryHitPoints(hp)
        let buffer = Text.StringBuilder("<i>").Append(HttpUtility.HtmlEncode chr.Name).Append("</i> : HP + ")