diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4e299d3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+# Python bytecode and cache
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Common virtual environments
+.venv/
+venv/
+env/
+
+# Tool caches
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+
+# OS/editor noise
+.DS_Store
+Thumbs.db
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5658a6d..0871bfe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to the OpenClaw Home Assistant Integration will be documented in this file.
 
+## [0.1.43] - 2026-02-21
+
+### Fixed
+- Improved Home Assistant Assist conversation continuity by using stable fallback session IDs when `conversation_id` is missing.
+- Assist now falls back to per-user (`assist_user_*`) or per-device (`assist_device_*`) session keys instead of a single generic default.
+
 ## [0.1.42] - 2026-02-21
 
 ### Added
diff --git a/custom_components/openclaw/__init__.py b/custom_components/openclaw/__init__.py
index b207b15..a215c1d 100644
--- a/custom_components/openclaw/__init__.py
+++ b/custom_components/openclaw/__init__.py
@@ -92,7 +92,7 @@ _CARD_PATH = Path(__file__).parent / "www" / _CARD_FILENAME
 # URL at which the card JS is served (registered via register_static_path)
 _CARD_STATIC_URL = f"/openclaw/{_CARD_FILENAME}"
 # Versioned URL used for Lovelace resource registration to avoid stale browser cache
-_CARD_URL = f"{_CARD_STATIC_URL}?v=0.1.42"
+_CARD_URL = f"{_CARD_STATIC_URL}?v=0.1.43"
 
 OpenClawConfigEntry = ConfigEntry
 
diff --git a/custom_components/openclaw/__pycache__/__init__.cpython-312.pyc b/custom_components/openclaw/__pycache__/__init__.cpython-312.pyc
deleted file mode 100644
index a531c08..0000000
Binary files a/custom_components/openclaw/__pycache__/__init__.cpython-312.pyc and /dev/null differ
diff --git a/custom_components/openclaw/__pycache__/conversation.cpython-312.pyc b/custom_components/openclaw/__pycache__/conversation.cpython-312.pyc
deleted file mode 100644
index b15cf4a..0000000
Binary files a/custom_components/openclaw/__pycache__/conversation.cpython-312.pyc and /dev/null differ
diff --git a/custom_components/openclaw/conversation.py b/custom_components/openclaw/conversation.py
index bc9394f..4d9dfd3 100644
--- a/custom_components/openclaw/conversation.py
+++ b/custom_components/openclaw/conversation.py
@@ -107,7 +107,7 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
         coordinator: OpenClawCoordinator = entry_data["coordinator"]
 
         message = user_input.text
-        conversation_id = user_input.conversation_id or "default"
+        conversation_id = self._resolve_conversation_id(user_input)
         assistant_id = "conversation"
         options = self.entry.options
         include_context = options.get(
@@ -189,6 +189,22 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
             conversation_id=conversation_id,
         )
 
+    def _resolve_conversation_id(self, user_input: conversation.ConversationInput) -> str:
+        """Return conversation id from HA or a stable Assist fallback session key."""
+        if user_input.conversation_id:
+            return user_input.conversation_id
+
+        context = getattr(user_input, "context", None)
+        user_id = getattr(context, "user_id", None)
+        if user_id:
+            return f"assist_user_{user_id}"
+
+        device_id = getattr(user_input, "device_id", None)
+        if device_id:
+            return f"assist_device_{device_id}"
+
+        return "assist_default"
+
     async def _get_response(
         self,
         client: OpenClawApiClient,
diff --git a/custom_components/openclaw/manifest.json b/custom_components/openclaw/manifest.json
index 442652a..1119b4b 100644
--- a/custom_components/openclaw/manifest.json
+++ b/custom_components/openclaw/manifest.json
@@ -8,7 +8,7 @@
   "iot_class": "local_polling",
   "issue_tracker": "https://github.com/techartdev/OpenClawHomeAssistant/issues",
   "requirements": [],
-  "version": "0.1.42",
+  "version": "0.1.43",
   "dependencies": ["conversation"],
   "after_dependencies": ["hassio", "lovelace"]
 }
diff --git a/www/openclaw-chat-card.js b/www/openclaw-chat-card.js
index 3685489..3b26fe1 100644
--- a/www/openclaw-chat-card.js
+++ b/www/openclaw-chat-card.js
@@ -1,7 +1,7 @@
 (async () => {
   try {
     if (!customElements.get("openclaw-chat-card")) {
-      const src = "/openclaw/openclaw-chat-card.js?v=0.1.42";
+      const src = "/openclaw/openclaw-chat-card.js?v=0.1.43";
       console.info("OpenClaw loader importing", src);
       await import(src);
     }