From 51ece61a610c7226a76ec91bbb3a7db0f8b5b3e1 Mon Sep 17 00:00:00 2001
From: CD <variet@variet.net>
Date: Sat, 7 Mar 2026 12:02:03 +0900
Subject: [PATCH] =?UTF-8?q?fix:=20=EC=B1=84=EB=84=90=20=EC=A4=91=EB=B3=B5?=
 =?UTF-8?q?=20=EC=99=84=EC=A0=84=20=ED=95=B4=EA=B2=B0=20-=20Discord=20?=
 =?UTF-8?q?=EC=BA=90=EC=8B=9C=20=EB=8C=80=EC=8B=A0=20=EC=9E=90=EC=B2=B4=20?=
 =?UTF-8?q?dict=EB=A1=9C=20=EC=9D=B4=EB=A6=84=20=EA=B2=80=EC=83=89?=
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---
 bot.py | 42 ++++++++++++++++++++----------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

diff --git a/bot.py b/bot.py
index a2ba2f7..fa6109f 100644
--- a/bot.py
+++ b/bot.py
@@ -195,7 +195,7 @@ class GravityBot(commands.Bot):
     async def _ensure_channel(
         self, conversation_id: str, project_name: str
     ) -> discord.TextChannel:
-        """Get or create a channel. Uses GLOBAL lock and NAME-based lookup."""
+        """Get or create a channel. Uses GLOBAL lock + OWN dict lookup (no cache issues)."""
         # Fast path: already mapped
         if conversation_id in self.session_channels:
             return self.session_channels[conversation_id]
@@ -208,24 +208,16 @@ class GravityBot(commands.Bot):
             channel_name = f"{Config.CHANNEL_PREFIX}-{project_name}"
             target_name = channel_name.lower().replace(" ", "-")
 
-            # Fetch FRESH channel list from Discord API (not cached)
-            if self.session_category:
-                category = await self.guild.fetch_channel(self.session_category.id)
-                for ch in category.text_channels:
-                    # Match by NAME (handles different conv IDs → same project)
-                    if ch.name == target_name or (ch.topic and conversation_id in ch.topic):
-                        self.session_channels[conversation_id] = ch
-                        self.session_names[conversation_id] = project_name
-                        # Rename from closed- if needed
-                        if ch.name.startswith("closed-"):
-                            try:
-                                await ch.edit(name=channel_name)
-                            except discord.errors.Forbidden:
-                                pass
-                        logger.info(f"Reusing existing channel #{ch.name}")
-                        return ch
+            # Check OWN dict for a channel with the same NAME
+            # (different conv IDs can share one channel)
+            for cid, ch in self.session_channels.items():
+                if ch.name == target_name:
+                    self.session_channels[conversation_id] = ch
+                    self.session_names[conversation_id] = project_name
+                    logger.info(f"Reusing channel #{ch.name} for {conversation_id[:8]}")
+                    return ch
 
-            # Create new channel (only if truly no match found)
+            # Create new channel (truly first time)
             try:
                 channel = await self.guild.create_text_channel(
                     name=channel_name,
@@ -280,10 +272,16 @@ class GravityBot(commands.Bot):
         if not channel:
             return
 
-        if event.file_name == "task.md":
-            await self._send_task_update(channel, event)
-        else:
-            await self._send_artifact_update(channel, event)
+        try:
+            if event.file_name == "task.md":
+                await self._send_task_update(channel, event)
+            else:
+                await self._send_artifact_update(channel, event)
+        except discord.NotFound:
+            # Channel was deleted while we held a reference
+            self.session_channels.pop(event.conversation_id, None)
+            self.session_status_messages.pop(event.conversation_id, None)
+            logger.warning(f"Channel deleted, cleared: {event.conversation_id[:8]}")
 
     # ─── Message Senders ─────────────────────────────────────────────