diff --git a/openapi.json b/openapi.json
index 7f1bf94..32fe5bd 100644
--- a/openapi.json
+++ b/openapi.json
@@ -7269,6 +7269,19 @@
             ],
             "title": "Finished At"
           },
+          "last_activity_at": {
+            "anyOf": [
+              {
+                "type": "string",
+                "format": "date-time"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Last Activity At",
+            "description": "When the session's latest event was ingested (agent steps, status changes, user messages). Null for sessions that predate this field."
+          },
           "anonymized_at": {
             "anyOf": [
               {
diff --git a/pyproject.toml b/pyproject.toml
index 5f234f7..bdc87f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "hai-agents"
-version = "1.0.7"
+version = "1.0.8"
 description = "Python SDK for H Company's Computer-Use Agents: autonomous agents powered by Holo."
 requires-python = ">=3.10"
 readme = "README.md"
diff --git a/src/hai_agents/core/client_wrapper.py b/src/hai_agents/core/client_wrapper.py
index 0100d15..3d2b9b7 100644
--- a/src/hai_agents/core/client_wrapper.py
+++ b/src/hai_agents/core/client_wrapper.py
@@ -29,9 +29,9 @@ def get_headers(self) -> typing.Dict[str, str]:
         import platform
 
         headers: typing.Dict[str, str] = {
-            "User-Agent": "hai_agents/1.0.7",
+            "User-Agent": "hai_agents/1.0.8",
             "X-HCompany-Client-Name": "hai_agents",
-            "X-HCompany-Client-Version": "1.0.7",
+            "X-HCompany-Client-Version": "1.0.8",
             "X-HCompany-Client-Type": "sdk",
             "X-HCompany-Language": "Python",
             "X-HCompany-Runtime": f"python/{platform.python_version()}",
diff --git a/src/hai_agents/types/session_summary.py b/src/hai_agents/types/session_summary.py
index 2c05e39..7a2e635 100644
--- a/src/hai_agents/types/session_summary.py
+++ b/src/hai_agents/types/session_summary.py
@@ -26,6 +26,11 @@ class SessionSummary(UniversalBaseModel):
     created_at: dt.datetime
     started_at: typing.Optional[dt.datetime] = None
     finished_at: typing.Optional[dt.datetime] = None
+    last_activity_at: typing.Optional[dt.datetime] = pydantic.Field(default=None)
+    """
+    When the session's latest event was ingested (agent steps, status changes, user messages). Null for sessions that predate this field.
+    """
+
     anonymized_at: typing.Optional[dt.datetime] = pydantic.Field(default=None)
     """
     When the session's PII text and screenshots were irreversibly anonymized. Null if not anonymized.
diff --git a/uv.lock b/uv.lock
index e0ac9d0..950d035 100644
--- a/uv.lock
+++ b/uv.lock
@@ -144,7 +144,7 @@ wheels = [
 
 [[package]]
 name = "hai-agents"
-version = "1.0.7"
+version = "1.0.8"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },