diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
new file mode 100644
index 0000000..01c6ef0
--- /dev/null
+++ b/.github/workflows/CI.yaml
@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.event.number || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  testing:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: install python 3.9
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
+          cache: "pip" # caching pip dependencies
+      - name: Check formatting (black)
+        run: |
+          pip install black
+          black . --check
diff --git a/tg.py b/tg.py
index 2f7ca7a..ecf2789 100644
--- a/tg.py
+++ b/tg.py
@@ -7,6 +7,8 @@ import traceback
 from tempfile import SpooledTemporaryFile
 from os import environ
 from pathlib import Path
+from typing import Optional
+
 
 import numpy as np
 import PIL
@@ -47,6 +49,36 @@ safety_settings = [
     },
 ]
 
+BOT_STARTS_WORDS_LIST = ["map:", "/map", "github:", "/github", "gemini", "/gemini"]
+
+
+#### Utils ####
+def extract_prompt(message: Message, bot_name: str) -> Optional[str]:
+    """
+    This function filters messages for prompts.
+
+    Returns:
+      str: If it is not a prompt, return None. Otherwise, return the trimmed prefix of the actual prompt.
+    """
+    msg_text: str = message.text.strip()
+    if msg_text.startswith("@"):
+        if not msg_text.startswith(f"@{bot_name} "):
+            return None
+        s = msg_text[len(bot_name) + 2 :]
+    else:
+        prefix = next(
+            (w for w in BOT_STARTS_WORDS_LIST if msg_text.startswith(w)), None
+        )
+        if not prefix:
+            return None
+        s = msg_text[len(prefix) :]
+        # If the first word is '@bot_name', remove it as it is considered part of the command when in a group chat.
+        if s.startswith("@"):
+            if not s.startswith(f"@{bot_name} "):
+                return None
+        s = " ".join(s.split(" ")[1:])
+    return s
+
 
 def make_new_gemini_convo():
     model = genai.GenerativeModel(
@@ -143,13 +175,17 @@ def main():
             BotCommand("gemini", "Gemini : /gemini <question>"),
         ]
     )
+    bot_name = bot.get_me().username
     print("Bot init done.")
 
     @bot.message_handler(commands=["github"])
     @bot.message_handler(regexp="^github:")
     def github_poster_handler(message: Message):
         reply_message = bot.reply_to(message, "Generating poster please wait:")
-        m = message.text.strip().split(maxsplit=1)[1].strip()
+        m = extract_prompt(message, bot_name)
+        if not m:
+            bot.reply_to(message, "Please provide info after start words.")
+            return
         message_list = m.split(",")
         name = message_list[0].strip()
         cmd_list = ["github_poster", "github", "--github_user_name", name, "--me", name]
@@ -179,7 +215,10 @@ def main():
         reply_message = bot.reply_to(
             message, "Generating pretty map may take some time please wait:"
         )
-        m = message.text.strip().split(maxsplit=1)[1].strip()
+        m = extract_prompt(message, bot_name)
+        if not m:
+            bot.reply_to(message, "Please provide info after start words.")
+            return
         location = m.strip()
         styles_list = list(STYLES.keys())
         style = random.choice(styles_list)
@@ -236,7 +275,10 @@ def main():
             message,
             "Generating google gemini answer please wait, note, will only keep the last five messages:",
         )
-        m = message.text.strip().split(maxsplit=1)[1].strip()
+        m = extract_prompt(message, bot_name)
+        if not m:
+            bot.reply_to(message, "Please provide info after start words.")
+            return
         player = None
         # restart will lose all TODO
         if str(message.from_user.id) not in gemini_player_dict:
@@ -290,7 +332,6 @@ def main():
         }
         try:
             response = model.generate_content(contents=contents)
-            print(response.text)
             bot.reply_to(message, "Gemini vision answer:\n" + response.text)
         except Exception as e:
             traceback.print_exc()