diff --git a/google/genai/interactions.py b/google/genai/interactions.py
index ca7afa204..55db21dd6 100644
--- a/google/genai/interactions.py
+++ b/google/genai/interactions.py
@@ -20,12 +20,57 @@
 
 from typing_extensions import Literal, Required, TypedDict
 
-# Import triggers before interactions so that interactions.Interaction (the
-# resource class) overrides triggers.Interaction (the TypeAliasType representing
-# nested interactions inside triggers) in the exported namespace, resolving
-# the name collision.
-from ._gaos.types.triggers import *  # noqa: F401,F403
-from ._gaos.types.triggers import __all__ as _triggers_all
+# Trigger create-params define nested `Interaction` / `InteractionParam`
+# TypeAliasTypes that share names with the interactions resource class.
+# Star-importing those aliases into this module makes mypy keep the first
+# binding (the TypeAliasType), while runtime last-binding-wins to the resource
+# class — see https://github.com/googleapis/python-genai/issues/2732.
+# Exclude the colliding names here; they remain available from
+# `google.genai._gaos.types.triggers`.
+from ._gaos.types.triggers import __all__ as _triggers_all_raw
+
+_TRIGGERS_NAMES_EXCLUDED_FROM_INTERACTIONS = frozenset({
+    'Interaction',
+    'InteractionParam',
+})
+
+_triggers_all = [
+    name
+    for name in _triggers_all_raw
+    if name not in _TRIGGERS_NAMES_EXCLUDED_FROM_INTERACTIONS
+]
+
+# Explicit imports so type checkers never bind the colliding TypeAliasTypes.
+# Keep this list aligned with triggers.__all__ minus the excluded names; the
+# assertion below fails if Speakeasy adds a new trigger export.
+from ._gaos.types.triggers import (  # noqa: F401
+    ListTriggerExecutionsResponse,
+    ListTriggerExecutionsResponseTypedDict,
+    ListTriggersResponse,
+    ListTriggersResponseTypedDict,
+    Trigger,
+    TriggerCreateParams,
+    TriggerCreateParamsParam,
+    TriggerExecution,
+    TriggerExecutionStatus,
+    TriggerExecutionTypedDict,
+    TriggerStatus,
+    TriggerTypedDict,
+    TriggerUpdate,
+    TriggerUpdateParam,
+    TriggerUpdateStatus,
+)
+
+_missing_trigger_exports = [
+    name for name in _triggers_all if name not in globals()
+]
+if _missing_trigger_exports:
+    raise ImportError(
+        'google.genai.interactions is missing trigger exports after excluding '
+        f'colliding Interaction aliases: {_missing_trigger_exports}. Update the '
+        'explicit triggers import list in google/genai/interactions.py.'
+    )
+
 from ._gaos.types.environments import *  # noqa: F401,F403
 from ._gaos.types.environments import __all__ as _environments_all
 from ._gaos.types.interactions import *  # noqa: F401,F403
@@ -137,6 +182,12 @@ class InteractionGetParamsStreaming(InteractionGetParamsBase):
     "WebhookRotateSigningSecretParams",
     "WebhookUpdateParams",
 ]
-# Ensure _interactions_all is appended last so interactions.Interaction wins
-# when doing wildcard imports from this module.
-__all__ = __all__ + list(_triggers_all) + list(_resources_all) + list(_environments_all) + list(_interactions_all)
+# Append interactions exports last so `Interaction` is the resource class for
+# wildcard imports. Trigger Interaction aliases are intentionally omitted above.
+__all__ = (
+    __all__
+    + list(_triggers_all)
+    + list(_resources_all)
+    + list(_environments_all)
+    + list(_interactions_all)
+)
diff --git a/google/genai/tests/interactions/test_interaction_type_export.py b/google/genai/tests/interactions/test_interaction_type_export.py
new file mode 100644
index 000000000..42e26a592
--- /dev/null
+++ b/google/genai/tests/interactions/test_interaction_type_export.py
@@ -0,0 +1,119 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""Tests for Interaction export typing/runtime consistency (#2732)."""
+
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+import textwrap
+from pathlib import Path
+
+import pytest
+
+from ...interactions import Interaction
+from ..._gaos.types.interactions.interaction import (
+    Interaction as InteractionResource,
+)
+from ..._gaos.types.triggers.triggercreateparams import (
+    Interaction as TriggerInteractionAlias,
+)
+
+
+def test_interactions_module_exports_resource_class_at_runtime():
+    assert Interaction is InteractionResource
+    assert Interaction is not TriggerInteractionAlias
+    assert isinstance(Interaction, type)
+
+
+def test_interactions_module_supports_isinstance_with_resource():
+    class _Dummy:
+        id = 'x'
+
+    # Resource class is a real type usable with isinstance.
+    assert not isinstance(_Dummy(), Interaction)
+
+
+def test_trigger_interaction_alias_still_importable_from_triggers():
+    from ..._gaos.types.triggers import Interaction as TriggersInteraction
+
+    assert TriggersInteraction is TriggerInteractionAlias
+
+
+def test_interactions_module_does_not_expose_trigger_interaction_param():
+    import google.genai.interactions as interactions_mod
+
+    assert getattr(interactions_mod, 'InteractionParam', None) is None
+    assert interactions_mod.Interaction.__name__ == 'Interaction'
+    assert interactions_mod.Interaction.__module__.endswith(
+        'types.interactions.interaction'
+    )
+
+
+@pytest.mark.skipif(
+    subprocess.run(
+        [sys.executable, '-m', 'mypy', '--version'],
+        capture_output=True,
+        check=False,
+    ).returncode
+    != 0,
+    reason='mypy is not installed',
+)
+def test_mypy_resolves_interaction_to_resource_class(tmp_path: Path):
+    """Regression for #2732: mypy must not treat Interaction as TypeAliasType."""
+    sample = tmp_path / 'check_interaction_export.py'
+    sample.write_text(
+        textwrap.dedent(
+            '''\
+            from google.genai.interactions import Interaction
+
+
+            def check(x: object) -> None:
+                if isinstance(x, Interaction):
+                    print(x.id)
+            '''
+        ),
+        encoding='utf-8',
+    )
+
+    repo_root = Path(__file__).resolve().parents[4]
+    env = os.environ.copy()
+    existing = env.get('PYTHONPATH', '')
+    env['PYTHONPATH'] = (
+        str(repo_root) + (os.pathsep + existing if existing else '')
+    )
+
+    result = subprocess.run(
+        [
+            sys.executable,
+            '-m',
+            'mypy',
+            '--strict',
+            '--follow-imports=silent',
+            str(sample),
+        ],
+        capture_output=True,
+        text=True,
+        cwd=str(repo_root),
+        env=env,
+    )
+    combined = (result.stdout or '') + (result.stderr or '')
+    assert 'TypeAliasType' not in combined, combined
+    assert result.returncode == 0, (
+        'mypy failed to treat google.genai.interactions.Interaction as the '
+        f'resource class.\nstdout:\n{result.stdout}\nstderr:\n{result.stderr}'
+    )
diff --git a/pyproject.toml b/pyproject.toml
index b07c2d44a..31d2951df 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -87,13 +87,12 @@ module = [
 # for imports. This will only affect the _gaos module.
 ignore_errors = true
 
-# This particularly for interactions.py.
+# This particularly for interactions.py (star-imports from generated packages).
 [[tool.mypy.overrides]]
 module = "google.genai.interactions"
 disable_error_code = [
     "misc",
     "assignment",
-    # Intentionally overriding imported alias, runtime safe.
     "no-redef",
 ]