From fe9ed75d3372a8a00998df120cd73ce973da02d4 Mon Sep 17 00:00:00 2001
From: "release-please[bot]"
 <55107282+release-please[bot]@users.noreply.github.com>
Date: Thu, 12 Nov 2026 01:22:04 +0000
Subject: [PATCH] chore(main): release 2.9.0

---
 .release-please-manifest.json                 |  2 +-
 CHANGELOG.md                                  | 21 +++++++++++++++++++
 agentplatform/version.py                      |  2 +-
 google/cloud/aiplatform/gapic_version.py      |  2 +-
 .../schema/predict/instance/gapic_version.py  |  2 +-
 .../predict/instance_v1/gapic_version.py      |  2 +-
 .../v1/schema/predict/params/gapic_version.py |  2 +-
 .../schema/predict/params_v1/gapic_version.py |  2 +-
 .../predict/prediction/gapic_version.py       |  2 +-
 .../predict/prediction_v1/gapic_version.py    |  2 +-
 .../trainingjob/definition/gapic_version.py   |  2 +-
 .../definition_v1/gapic_version.py            |  2 +-
 .../schema/predict/instance/gapic_version.py  |  2 +-
 .../predict/instance_v1beta1/gapic_version.py |  2 +-
 .../schema/predict/params/gapic_version.py    |  2 +-
 .../predict/params_v1beta1/gapic_version.py   |  2 +-
 .../predict/prediction/gapic_version.py       |  2 +-
 .../prediction_v1beta1/gapic_version.py       |  2 +-
 .../trainingjob/definition/gapic_version.py   |  2 +-
 .../definition_v1beta1/gapic_version.py       |  2 +-
 google/cloud/aiplatform/version.py            |  2 +-
 google/cloud/aiplatform_v1/gapic_version.py   |  2 +-
 .../cloud/aiplatform_v1beta1/gapic_version.py |  2 +-
 pypi/_vertex_ai_placeholder/version.py        |  2 +-
 ...t_metadata_google.cloud.aiplatform.v1.json |  2 +-
 ...adata_google.cloud.aiplatform.v1beta1.json |  2 +-
 26 files changed, 46 insertions(+), 25 deletions(-)

diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 8388fe1051..6bb50d96eb 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "2.8.0"
+    ".": "2.9.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1538b87d4..60306a5538 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,26 @@
 # Changelog
 
+## [2.9.0](https://github.com/googleapis/python-aiplatform/compare/v2.8.0...v2.9.0) (2026-11-12)
+
+
+### Features
+
+* Add missing enum values to FinishReason and ReinforcementTuningThinkingLevel ([73a1a09](https://github.com/googleapis/python-aiplatform/commit/73a1a09c2db0384b80b56672efe9b06633075a6a))
+* Update discovery doc ([9b3f296](https://github.com/googleapis/python-aiplatform/commit/9b3f2968516aad039a70339a68a2bf4427e879fe))
+
+
+### Bug Fixes
+
+* Allow litellm&lt;1.110.0 in evaluation extra, excluding 1.107.0 ([10814f7](https://github.com/googleapis/python-aiplatform/commit/10814f7d99a59c1592ea7cbab747e60a38fe584d))
+* Migrate usage of mock to unittest.mock ([dcf3026](https://github.com/googleapis/python-aiplatform/commit/dcf30265b70721d3cf6accbd4a12c4e84e118c07))
+* Remove brittle client-side installation_scripts path validation in Agent Engine SDK ([74d17cc](https://github.com/googleapis/python-aiplatform/commit/74d17cc6ddc0b815082bf2600b85d86cef546289))
+* Support per-call timeout in Agent Engine A2A operations ([d309536](https://github.com/googleapis/python-aiplatform/commit/d30953657dbb1441f617a3365b49b658c53b96b5))
+
+
+### Documentation
+
+* Update `AdkApp.async_stream_query` docstring for multimodal `message` dicts and add unit tests. ([1b1f8fc](https://github.com/googleapis/python-aiplatform/commit/1b1f8fc092afd6d02bc93f69daedfa343c36d4fc))
+
 ## [2.8.0](https://github.com/googleapis/python-aiplatform/compare/v2.7.0...v2.8.0) (2026-11-10)
 
 
diff --git a/agentplatform/version.py b/agentplatform/version.py
index 8e4c33cbe3..10a226a60a 100644
--- a/agentplatform/version.py
+++ b/agentplatform/version.py
@@ -14,4 +14,4 @@
 #
 """Version file for agentplatform."""
 
-__version__ = "2.8.0"
+__version__ = "2.9.0"
diff --git a/google/cloud/aiplatform/gapic_version.py b/google/cloud/aiplatform/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/gapic_version.py
+++ b/google/cloud/aiplatform/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/instance/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/instance/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/instance/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/instance/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/instance_v1/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/instance_v1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/instance_v1/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/instance_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/params/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/params/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/params/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/params/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/params_v1/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/params_v1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/params_v1/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/params_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/prediction/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/prediction/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/prediction/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/prediction/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/predict/prediction_v1/gapic_version.py b/google/cloud/aiplatform/v1/schema/predict/prediction_v1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/predict/prediction_v1/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/predict/prediction_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/trainingjob/definition/gapic_version.py b/google/cloud/aiplatform/v1/schema/trainingjob/definition/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/trainingjob/definition/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/trainingjob/definition/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1/schema/trainingjob/definition_v1/gapic_version.py b/google/cloud/aiplatform/v1/schema/trainingjob/definition_v1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1/schema/trainingjob/definition_v1/gapic_version.py
+++ b/google/cloud/aiplatform/v1/schema/trainingjob/definition_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/instance/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/instance/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/instance/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/instance/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/instance_v1beta1/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/instance_v1beta1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/instance_v1beta1/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/instance_v1beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/params/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/params/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/params/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/params/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/params_v1beta1/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/params_v1beta1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/params_v1beta1/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/params_v1beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/prediction/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/prediction/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/prediction/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/prediction/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/predict/prediction_v1beta1/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/predict/prediction_v1beta1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/predict/prediction_v1beta1/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/predict/prediction_v1beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition_v1beta1/gapic_version.py b/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition_v1beta1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition_v1beta1/gapic_version.py
+++ b/google/cloud/aiplatform/v1beta1/schema/trainingjob/definition_v1beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/version.py b/google/cloud/aiplatform/version.py
index 17bd9e348b..f30d9cd58d 100644
--- a/google/cloud/aiplatform/version.py
+++ b/google/cloud/aiplatform/version.py
@@ -15,4 +15,4 @@
 # limitations under the License.
 #
 
-__version__ = "2.8.0"
+__version__ = "2.9.0"
diff --git a/google/cloud/aiplatform_v1/gapic_version.py b/google/cloud/aiplatform_v1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform_v1/gapic_version.py
+++ b/google/cloud/aiplatform_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform_v1beta1/gapic_version.py b/google/cloud/aiplatform_v1beta1/gapic_version.py
index e248a9caf4..60aeb18dbd 100644
--- a/google/cloud/aiplatform_v1beta1/gapic_version.py
+++ b/google/cloud/aiplatform_v1beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.8.0"  # {x-release-please-version}
+__version__ = "2.9.0"  # {x-release-please-version}
diff --git a/pypi/_vertex_ai_placeholder/version.py b/pypi/_vertex_ai_placeholder/version.py
index d66140f228..933ba4f07a 100644
--- a/pypi/_vertex_ai_placeholder/version.py
+++ b/pypi/_vertex_ai_placeholder/version.py
@@ -15,4 +15,4 @@
 # limitations under the License.
 #
 
-__version__ = "2.8.0"
+__version__ = "2.9.0"
diff --git a/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1.json b/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1.json
index 2a94791f6e..27fdde206a 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-aiplatform",
-    "version": "2.8.0"
+    "version": "2.9.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1beta1.json b/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1beta1.json
index b0bee13e3f..63114ad875 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1beta1.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.aiplatform.v1beta1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-aiplatform",
-    "version": "2.8.0"
+    "version": "2.9.0"
   },
   "snippets": [
     {