diff --git a/test.py b/test.py
index 60f1798..53e089f 100644
--- a/test.py
+++ b/test.py
@@ -1,7 +1,9 @@
 from __future__ import annotations
 
 import asyncio
+import os
 import time
+from datetime import datetime
 from typing import TypedDict
 
 import atproto
@@ -10,7 +12,7 @@ from atproto_client.models.app.bsky.feed.get_timeline import Response
 from atproto_client.models.com.atproto.repo.strong_ref import Main
 
 import account
-from nizika_ai.consts import QueryType
+from nizika_ai.consts import Character, GPTModel, Platform, QueryType
 from nizika_ai.models import Answer, AnsweredFlag, Query, User
 
 TARGET_WORDS = ['deerjika', 'ニジカ', 'ぼっち', '虹夏', '郁代', 'バーカ',
@@ -35,15 +37,17 @@ async def main (
     """
 
     await asyncio.gather (like_posts (),
-                          reply (),
                           check_mentions ())
 
 
 async def like_posts (
 ) -> None:
     while True:
-        for post in fetch_target_posts ():
-            client.like (**post)
+        try:
+            for post in fetch_target_posts ():
+                client.like (**post)
+        except Exception as e:
+            print (f"[like_posts] { type (e).__name__ }: { e }")
 
         await asyncio.sleep (60)
 
@@ -51,18 +55,21 @@ async def like_posts (
 async def check_mentions (
 ) -> None:
     while True:
-        for uri in check_notifications ():
-            records = fetch_thread_contents (uri, 20)
-            if records:
-                record = records[0]
-                content = record['text']
-                image_url: str | None = None
-                if record['embed'] and hasattr (record['embed'], 'images'):
-                    image_url = ('https://cdn.bsky.app/img/feed_fullsize/plain'
-                                 f"/{ record['did'] }"
-                                 f"/{ record['embed'].images[0].image.ref.link }")
-                user = _fetch_user (record['did'], record['name'])
-                _add_query (user, record['text'], image_url)
+        try:
+            for uri in check_notifications ():
+                records = fetch_thread_contents (uri, 20)
+                if records:
+                    record = records[0]
+                    content = record['text']
+                    image_url: str | None = None
+                    if record['embed'] and hasattr (record['embed'], 'images'):
+                        image_url = ('https://cdn.bsky.app/img/feed_fullsize/plain'
+                                     f"/{ record['did'] }"
+                                     f"/{ record['embed'].images[0].image.ref.link }")
+                    user = _fetch_user (record['did'], record['name'])
+                    _add_query (user, record['text'], image_url)
+        except Exception as e:
+            print (f"[check_mentions] { type (e).__name__ }: { e }")
 
         await asyncio.sleep (60)
 
@@ -100,11 +107,11 @@ def fetch_thread_contents (
     while res:
         records.append ({ 'strong_ref': atproto.models.create_strong_ref (res.post),
                           'did':        res.post.author.did,
-                          'handle':     response.post.author.handle,
-                          'name':       response.post.author.display_name,
-                          'datetime':   response.post.record.created_at,
-                          'text':       response.post.record.text,
-                          'embed':      response.post.record.embed })
+                          'handle':     res.post.author.handle,
+                          'name':       res.post.author.display_name,
+                          'datetime':   res.post.record.created_at,
+                          'text':       res.post.record.text,
+                          'embed':      res.post.record.embed })
         res = res.parent
 
     return records
@@ -118,7 +125,7 @@ def fetch_target_posts (
     for feed in timeline.feed:
         if (feed.post.author.did != client.me.did
                 and (feed.post.viewer.like is None)
-                and any (target_word in feed.post.record.text.lower ()
+                and any (target_word in (feed.post.record.text or '').casefold ()
                          for target_word in TARGET_WORDS)):
             posts.append (LikeParams ({ 'uri': feed.post.uri, 'cid': feed.post.cid }))
 
@@ -147,10 +154,10 @@ def _fetch_user (
         did:    str,
         name:   str,
 ) -> User:
-    user = User.where ('platform', Platform.BLUESKY).where ('code', did).first ()
+    user = User.where ('platform', Platform.BLUESKY.value).where ('code', did).first ()
     if user is None:
         user = User ()
-        user.platform = Platfrom.BLUESKY
+        user.platform = Platform.BLUESKY.value
         user.code = did
     user.name = name
     user.save ()