rolling privately and command tree

bot.py

@@ -1,41 +1,47 @@
 import discord
-from discord.ext import commands
-from discord.ext.commands.context import Context
+from discord.app_commands import CommandTree
 from os import environ
 
 from dice import Dice, DiceTextError
 
-prefix = "$"
 
 intents = discord.Intents.default()
 intents.message_content = True
 
-bot = commands.Bot(command_prefix=prefix, intents=intents)
+bot = discord.Client(intents=intents)
+tree = CommandTree(bot)
 
 
 @bot.event
 async def on_ready():
-    print("Hello World!")
+    await tree.sync()  # Bad idea
 
 
-@bot.command()
-async def roll(ctx: Context, *args: str):
-    dice = []
-    for arg in args:
-        dice.append(Dice(arg))
+@tree.command()
+@discord.app_commands.describe(
+    dice="Dice to be rolled in format [number]d[sides]",
+    private="Roll privatly or publicly",
+)
+async def roll(interaction: discord.Interaction, dice: str, private: bool):
+    dice_objs = [Dice(d) for d in dice.split(" ")]
 
     try:
         text = []
-        for die in dice:
+        for die in dice_objs:
             roll = die.roll()
             text.append(f"{die.text} => {roll} = {sum(roll)}")
             print(text)
     except DiceTextError as e:
         print(e)
-        await ctx.send(str(e))
+        await interaction.response.send_message(str(e))
         return
 
-    await ctx.send("\n".join(text))
+    if not private:
+        intro = interaction.user.display_name + " rolled:\n"
+    else:
+        intro = "You rolled:\n"
+
+    await interaction.response.send_message(intro + "\n".join(text), ephemeral=private)
 
 
 token = environ.get("DISCORD_TOKEN")