diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index d0b8295a1a..3eb51cf679 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "1.165.1"
+    ".": "2.0.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d59a69487..70d9784de3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,39 @@
 # Changelog
 
+## [2.0.0](https://github.com/googleapis/python-aiplatform/compare/v1.165.1...v2.0.0) (2026-08-27)
+
+
+### ⚠ BREAKING CHANGES
+
+* **agentplatform:** `agent_engines` module renamed to `runtimes`.
+* **agentplatform:** `a2a tasks` module is removed.
+* **agentplatform:** `sessions` and `sandboxes` moved to top-level modules.
+* **agentplatform:** Removed global initializer dependency. Agent frameworks now read project and location from environment variables.
+* **agentplatform:** `runtime templates` import changed from `agentplatform.agent_engines.templates` to `agentplatform.frameworks`.
+* **agentplatform:** `evals.run_inference(agent=...)` now accepts `types.Runtime` instead of `types.AgentEngine`.
+* **agentplatform:** Migrate Memory Bank methods to `client.memory_banks` sub-module.
+
+
+### Features
+
+* Add sandboxes.pause() and sandboxes.resume() methods to the Agent Engine sandbox SDK across Python, Java, and JS SDKs. ([9b92c88](https://github.com/googleapis/python-aiplatform/commit/9b92c881353f1d09549638ab998f86136bb08203))
+* Add Shell Sandbox environment support to the Agent Engine sandbox SDK ([8f87082](https://github.com/googleapis/python-aiplatform/commit/8f87082ae4aa0e4c116245b3c8a328e9a55ea6a0))
+* **agentplatform:** Support client.memory_banks.get ([6dfe678](https://github.com/googleapis/python-aiplatform/commit/6dfe67856cd03919113149dd26a1e067eb186523))
+* **agentplatform:** Support client.memory_banks.list ([6dfe678](https://github.com/googleapis/python-aiplatform/commit/6dfe67856cd03919113149dd26a1e067eb186523))
+* **agentplatform:** Support ExampleStores module for few-shot example management ([5248240](https://github.com/googleapis/python-aiplatform/commit/52482409f21fadbfa062b7d5c6c95e92309e8ac5))
+* **agentplatform:** Support Memory Bank configs. ([6dfe678](https://github.com/googleapis/python-aiplatform/commit/6dfe67856cd03919113149dd26a1e067eb186523))
+* Decouple agentplatform from google-cloud-aiplatform and package it as a standalone PyPI package `google-cloud-agentplatform`. ([e0e32c2](https://github.com/googleapis/python-aiplatform/commit/e0e32c2fd7e51bea0b85b3039561aec0e78ec29e))
+* Expose ingress_control_config field on SandboxEnvironmentTemplate across Python, Java, and JS SDKs. ([c08ed98](https://github.com/googleapis/python-aiplatform/commit/c08ed9851db8b36a217059c85ed377c7154eb685))
+* Expose service_attachment field on SandboxEnvironmentConnectionInfo across Python, Java, JS, and Go SDKs. ([b781b0e](https://github.com/googleapis/python-aiplatform/commit/b781b0e94bb2da22858d12d45d34e48b3dd3c68a))
+
+
+### Bug Fixes
+
+* Add identity_type and service_account support to Reasoning Engines and Agent Engines. ([a8536aa](https://github.com/googleapis/python-aiplatform/commit/a8536aa08eb300ac2d146110e926406cf45abaa6))
+* Propagate the underlying API error from AdkApp's synchronous session methods and streaming agent runs ([91cc8ce](https://github.com/googleapis/python-aiplatform/commit/91cc8ce4f015771b5d8c43c8764ea9dc9abdb216))
+* Serve public A2A agent card at /a2a/card on Agent Runtime ([85cba30](https://github.com/googleapis/python-aiplatform/commit/85cba30078b1b2dd152b6a934675dabc8c9ec750))
+* Treat forwarded OAuth access tokens as ephemeral session state ([7e95ce6](https://github.com/googleapis/python-aiplatform/commit/7e95ce6046acea7f13b3a629f9b98558d20e3c20))
+
 ## [1.165.1](https://github.com/googleapis/python-aiplatform/compare/v1.165.0...v1.165.1) (2026-08-19)
 
 
diff --git a/agentplatform/version.py b/agentplatform/version.py
index 7ae7b983c8..5b68a0bd03 100644
--- a/agentplatform/version.py
+++ b/agentplatform/version.py
@@ -14,4 +14,4 @@
 #
 """Version file for agentplatform."""
 
-__version__ = "1.165.1"
+__version__ = "2.0.0"
diff --git a/google/cloud/aiplatform/gapic_version.py b/google/cloud/aiplatform/gapic_version.py
index c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {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 c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform/version.py b/google/cloud/aiplatform/version.py
index babf04a2d3..1410b8d26f 100644
--- a/google/cloud/aiplatform/version.py
+++ b/google/cloud/aiplatform/version.py
@@ -15,4 +15,4 @@
 # limitations under the License.
 #
 
-__version__ = "1.165.1"
+__version__ = "2.0.0"
diff --git a/google/cloud/aiplatform_v1/gapic_version.py b/google/cloud/aiplatform_v1/gapic_version.py
index c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {x-release-please-version}
diff --git a/google/cloud/aiplatform_v1beta1/gapic_version.py b/google/cloud/aiplatform_v1beta1/gapic_version.py
index c18dd04289..7311e83d90 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__ = "1.165.1"  # {x-release-please-version}
+__version__ = "2.0.0"  # {x-release-please-version}
diff --git a/pypi/_vertex_ai_placeholder/version.py b/pypi/_vertex_ai_placeholder/version.py
index 842ce232f8..51ae708a91 100644
--- a/pypi/_vertex_ai_placeholder/version.py
+++ b/pypi/_vertex_ai_placeholder/version.py
@@ -15,4 +15,4 @@
 # limitations under the License.
 #
 
-__version__ = "1.165.1"
+__version__ = "2.0.0"
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 71990a98ba..92d717756c 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": "1.165.1"
+    "version": "2.0.0"
   },
   "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 d8d7309b37..8b7154e8c7 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": "1.165.1"
+    "version": "2.0.0"
   },
   "snippets": [
     {