diff --git a/temporalio/contrib/google_genai/_compat.py b/temporalio/contrib/google_genai/_compat.py
new file mode 100644
index 000000000..6613e2b9c
--- /dev/null
+++ b/temporalio/contrib/google_genai/_compat.py
@@ -0,0 +1,24 @@
+"""Version-compatibility shims for the ``google-genai`` SDK.
+
+Single home for workarounds that keep the plugin importable and
+type-checkable across the supported ``google-genai`` range; remove entries
+as upstream fixes land.
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    # google-genai 2.12.0 exports two ``Interaction`` names: the interaction
+    # resource class and a ``TypeAliasType`` over the trigger-request
+    # variants. At runtime we get the resource class but type checkers
+    # resolve to the alias which causes failures (the alias has no ``id``,
+    # etc.). Force the type checker to see the class' defining module (in
+    # the same location in 2.10 and 2.12).
+    from google.genai._gaos.types.interactions.interaction import Interaction
+else:
+    # At runtime, Interaction resolves properly for 2.10 and 2.12
+    from google.genai.interactions import Interaction
+
+__all__ = ["Interaction"]
diff --git a/temporalio/contrib/google_genai/_gemini_activity.py b/temporalio/contrib/google_genai/_gemini_activity.py
index 2e92c56a1..496bbf1ab 100644
--- a/temporalio/contrib/google_genai/_gemini_activity.py
+++ b/temporalio/contrib/google_genai/_gemini_activity.py
@@ -17,11 +17,11 @@
 from google.genai import Client as GeminiClient
 from google.genai import errors as genai_errors
 from google.genai import types
-from google.genai.interactions import Interaction
 from google.genai.types import HttpOptions
 from google.genai.types import HttpResponse as SdkHttpResponse
 
 from temporalio import activity
+from temporalio.contrib.google_genai._compat import Interaction
 from temporalio.contrib.google_genai._models import (
     _GeminiApiRequest,
     _GeminiApiResponse,
diff --git a/temporalio/contrib/google_genai/_temporal_interactions.py b/temporalio/contrib/google_genai/_temporal_interactions.py
index b5eb2edc0..54d8353cd 100644
--- a/temporalio/contrib/google_genai/_temporal_interactions.py
+++ b/temporalio/contrib/google_genai/_temporal_interactions.py
@@ -20,9 +20,10 @@
 from typing import Any, cast
 
 import pydantic
-from google.genai.interactions import Interaction, InteractionSSEEvent
+from google.genai.interactions import InteractionSSEEvent
 
 from temporalio import workflow as temporal_workflow
+from temporalio.contrib.google_genai._compat import Interaction
 from temporalio.contrib.google_genai._models import (
     _GeminiInteractionIdRequest,
     _GeminiInteractionRequest,
diff --git a/tests/contrib/google_genai/test_gemini.py b/tests/contrib/google_genai/test_gemini.py
index 543ad648c..0881f63b3 100644
--- a/tests/contrib/google_genai/test_gemini.py
+++ b/tests/contrib/google_genai/test_gemini.py
@@ -32,7 +32,6 @@
 from google.genai import types
 from google.genai.interactions import (
     Agent,  # pyright: ignore[reportPrivateImportUsage]
-    Interaction,
     InteractionSSEEvent,
 )
 from google.genai.types import HttpResponse as SdkHttpResponse
@@ -45,6 +44,7 @@
     GoogleGenAIPlugin,
     activity_as_tool,
 )
+from temporalio.contrib.google_genai._compat import Interaction
 from temporalio.contrib.google_genai._models import (
     _GeminiApiRequest,
     _GeminiApiResponse,