diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27bdf6b..4427c88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 All notable changes to the OpenClaw Home Assistant Integration will be documented in this file.
 
+## [0.1.13] - 2026-02-20
+
+### Added
+- Added native Home Assistant Assist entity exposure support to OpenClaw requests.
+- OpenClaw now includes context for entities exposed in **Settings → Voice assistants → Expose**.
+
+### Changed
+- Service chat (`openclaw.send_message`) and conversation agent (streaming + fallback) now pass exposed-entities context as a system prompt.
+
 ## [0.1.12] - 2026-02-20
 
 ### Fixed
diff --git a/README.md b/README.md
index 6fa540f..0754143 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,17 @@ A native Home Assistant integration for communicating with the
 The **OpenClaw Assistant** addon must be installed and running.  
 The integration will auto-detect it — no manual configuration needed.
 
+## Exposed entities (important)
+
+OpenClaw uses Home Assistant's native **Assist entity exposure** controls.
+Only entities exposed to Assist are included in the context sent to OpenClaw.
+
+Configure this in Home Assistant:
+
+1. Go to **Settings → Voice assistants**
+2. Open the **Expose** tab
+3. Select which entities are exposed to **Assist**
+
 ## Chat Card
 
 The chat card is registered automatically when the integration loads — no
diff --git a/custom_components/openclaw/__init__.py b/custom_components/openclaw/__init__.py
index 933a22f..b8e061b 100644
--- a/custom_components/openclaw/__init__.py
+++ b/custom_components/openclaw/__init__.py
@@ -44,6 +44,7 @@ from .const import (
     SERVICE_SEND_MESSAGE,
 )
 from .coordinator import OpenClawCoordinator
+from .exposure import build_exposed_entities_context
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -313,9 +314,11 @@ def _async_register_services(hass: HomeAssistant) -> None:
         coordinator: OpenClawCoordinator = entry_data["coordinator"]
 
         try:
+            system_prompt = build_exposed_entities_context(hass, assistant="assist")
             response = await client.async_send_message(
                 message=message,
                 session_id=session_id,
+                system_prompt=system_prompt,
             )
 
             assistant_message = _extract_assistant_message(response)
diff --git a/custom_components/openclaw/api.py b/custom_components/openclaw/api.py
index b629128..b4777ca 100644
--- a/custom_components/openclaw/api.py
+++ b/custom_components/openclaw/api.py
@@ -165,6 +165,7 @@ class OpenClawApiClient:
         message: str,
         session_id: str | None = None,
         model: str | None = None,
+        system_prompt: str | None = None,
         stream: bool = False,
     ) -> dict[str, Any]:
         """Send a chat message (non-streaming).
@@ -181,8 +182,13 @@ class OpenClawApiClient:
         if stream:
             raise ValueError("Use async_stream_message() for streaming")
 
+        messages: list[dict[str, str]] = []
+        if system_prompt:
+            messages.append({"role": "system", "content": system_prompt})
+        messages.append({"role": "user", "content": message})
+
         payload: dict[str, Any] = {
-            "messages": [{"role": "user", "content": message}],
+            "messages": messages,
             "stream": False,
         }
         if model:
@@ -220,6 +226,7 @@ class OpenClawApiClient:
         message: str,
         session_id: str | None = None,
         model: str | None = None,
+        system_prompt: str | None = None,
     ) -> AsyncIterator[str]:
         """Send a chat message and stream the response via SSE.
 
@@ -233,8 +240,13 @@ class OpenClawApiClient:
         Yields:
             Content delta strings from the streaming response.
         """
+        messages: list[dict[str, str]] = []
+        if system_prompt:
+            messages.append({"role": "system", "content": system_prompt})
+        messages.append({"role": "user", "content": message})
+
         payload: dict[str, Any] = {
-            "messages": [{"role": "user", "content": message}],
+            "messages": messages,
             "stream": True,
         }
         if model:
diff --git a/custom_components/openclaw/conversation.py b/custom_components/openclaw/conversation.py
index 0cbdfcc..b694df3 100644
--- a/custom_components/openclaw/conversation.py
+++ b/custom_components/openclaw/conversation.py
@@ -26,6 +26,7 @@ from .const import (
     EVENT_MESSAGE_RECEIVED,
 )
 from .coordinator import OpenClawCoordinator
+from .exposure import build_exposed_entities_context
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -100,9 +101,23 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
 
         message = user_input.text
         conversation_id = user_input.conversation_id or "default"
+        assistant_id = getattr(user_input, "assistant", None) or "assist"
+        exposed_context = build_exposed_entities_context(
+            self.hass,
+            assistant=assistant_id,
+        )
+        extra_system_prompt = getattr(user_input, "extra_system_prompt", None)
+        system_prompt = "\n\n".join(
+            part for part in (exposed_context, extra_system_prompt) if part
+        ) or None
 
         try:
-            full_response = await self._get_response(client, message, conversation_id)
+            full_response = await self._get_response(
+                client,
+                message,
+                conversation_id,
+                system_prompt,
+            )
         except OpenClawApiError as err:
             _LOGGER.error("OpenClaw conversation error: %s", err)
 
@@ -113,7 +128,10 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
                 if refreshed:
                     try:
                         full_response = await self._get_response(
-                            client, message, conversation_id
+                            client,
+                            message,
+                            conversation_id,
+                            system_prompt,
                         )
                     except OpenClawApiError as retry_err:
                         return self._error_result(
@@ -156,6 +174,7 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
         client: OpenClawApiClient,
         message: str,
         conversation_id: str,
+        system_prompt: str | None = None,
     ) -> str:
         """Get a response from OpenClaw, trying streaming first."""
         # Try streaming (lower TTFB for voice pipeline)
@@ -163,6 +182,7 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
         async for chunk in client.async_stream_message(
             message=message,
             session_id=conversation_id,
+            system_prompt=system_prompt,
         ):
             full_response += chunk
 
@@ -173,6 +193,7 @@ class OpenClawConversationAgent(conversation.AbstractConversationAgent):
         response = await client.async_send_message(
             message=message,
             session_id=conversation_id,
+            system_prompt=system_prompt,
         )
         extracted = self._extract_text_recursive(response)
         return extracted or ""
diff --git a/custom_components/openclaw/exposure.py b/custom_components/openclaw/exposure.py
new file mode 100644
index 0000000..c3b2bcb
--- /dev/null
+++ b/custom_components/openclaw/exposure.py
@@ -0,0 +1,57 @@
+"""Helpers for Assist entity exposure context."""
+
+from __future__ import annotations
+
+from collections import Counter
+
+from homeassistant.components.homeassistant import async_should_expose
+from homeassistant.core import HomeAssistant
+
+
+def build_exposed_entities_context(
+    hass: HomeAssistant,
+    assistant: str | None = "assist",
+    max_entities: int = 250,
+) -> str | None:
+    """Build a compact prompt block of entities exposed to an assistant.
+
+    Uses Home Assistant's built-in expose rules (Settings -> Voice assistants -> Expose).
+    """
+    assistant_id = assistant or "assist"
+
+    exposed_states = [
+        state
+        for state in hass.states.async_all()
+        if async_should_expose(hass, assistant_id, state.entity_id)
+    ]
+
+    if not exposed_states:
+        return None
+
+    exposed_states.sort(key=lambda state: state.entity_id)
+    domain_counts = Counter(state.domain for state in exposed_states)
+
+    lines: list[str] = [
+        "Home Assistant live context (entities exposed to this assistant):",
+        f"- total_exposed_entities: {len(exposed_states)}",
+        "- domain_counts:",
+    ]
+    lines.extend(f"  - {domain}: {count}" for domain, count in sorted(domain_counts.items()))
+    lines.append("- entities:")
+
+    for state in exposed_states[:max_entities]:
+        friendly_name = state.name or state.entity_id
+        lines.append(
+            f"  - id: {state.entity_id}; name: {friendly_name}; state: {state.state}"
+        )
+
+    if len(exposed_states) > max_entities:
+        lines.append(
+            f"  - ... {len(exposed_states) - max_entities} additional exposed entities omitted"
+        )
+
+    lines.append(
+        "Use only these exposed entities when answering or controlling Home Assistant."
+    )
+
+    return "\n".join(lines)
diff --git a/custom_components/openclaw/manifest.json b/custom_components/openclaw/manifest.json
index 73e1d86..223a001 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": "0.1.12",
+  "version": "0.1.13",
   "dependencies": ["conversation"],
   "after_dependencies": ["hassio", "lovelace"]
 }