diff --git a/.github/workflows/check-version-bump.yaml b/.github/workflows/check-version-bump.yaml
index 8bbb923b..3db4af42 100644
--- a/.github/workflows/check-version-bump.yaml
+++ b/.github/workflows/check-version-bump.yaml
@@ -25,12 +25,12 @@ jobs:
 
           CHANGED_FILES=$(git diff --name-only "$BASE_SHA" "$HEAD_SHA")
 
-          if echo "$CHANGED_FILES" | grep -q "^src/"; then
+          if echo "$CHANGED_FILES" | grep -qE "^src/.*\.(py|pyi|proto)$"; then
             BASE_VERSION=$(git show "$BASE_SHA:pyproject.toml" | grep "^version = " | cut -d'"' -f2)
             HEAD_VERSION=$(git show "$HEAD_SHA:pyproject.toml" | grep "^version = " | cut -d'"' -f2)
 
             if [ "$BASE_VERSION" = "$HEAD_VERSION" ]; then
-              echo "ERROR: Files under src/ were modified but the version in pyproject.toml was not bumped (still $HEAD_VERSION)."
+              echo "ERROR: Source files under src/ were modified but the version in pyproject.toml was not bumped (still $HEAD_VERSION)."
               exit 1
             fi
 
@@ -42,5 +42,5 @@ jobs:
 
             echo "Version bump OK: $BASE_VERSION → $HEAD_VERSION"
           else
-            echo "No src/ changes. Version bump not required."
+            echo "No source file changes under src/. Version bump not required."
           fi
diff --git a/.github/workflows/checks.yaml b/.github/workflows/checks.yaml
index 012883e8..f6409323 100644
--- a/.github/workflows/checks.yaml
+++ b/.github/workflows/checks.yaml
@@ -32,11 +32,8 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - name: "Run Ruff Linter"
-        run: uv run ruff check --output-format=github .
+      - name: "Install dependencies"
+        run: uv sync --all-extras
 
-      - name: "Run Ruff Formatter Check"
-        run: uv run ruff format --check --diff .
-
-      - name: "Run ty Type Check"
-        run: uv run ty check --output-format github --python-version ${{ env.PYTHON_VERSION }} .
+      - name: "Run pre-commit hooks"
+        run: uvx pre-commit run --all-files
diff --git a/.gitignore b/.gitignore
index 70111605..e4e2b91c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,4 +38,4 @@ mocks/
 
 # Generated files
 PULL_REQUEST.md
-RELEASE.md
\ No newline at end of file
+RELEASE.md
diff --git a/pyproject.toml b/pyproject.toml
index 35a660e7..c41737f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "sap-cloud-sdk"
-version = "0.25.1"
+version = "0.25.2"
 description = "SAP Cloud SDK for Python"
 readme = "README.md"
 license = "Apache-2.0"
diff --git a/src/sap_cloud_sdk/agent_memory/py.typed b/src/sap_cloud_sdk/agent_memory/py.typed
index 7f8a6b09..14305056 100644
--- a/src/sap_cloud_sdk/agent_memory/py.typed
+++ b/src/sap_cloud_sdk/agent_memory/py.typed
@@ -1 +1 @@
-# Marker file for PEP 561 to indicate the 'agent_memory' package is typed.
\ No newline at end of file
+# Marker file for PEP 561 to indicate the 'agent_memory' package is typed.
diff --git a/src/sap_cloud_sdk/agentgateway/user-guide.md b/src/sap_cloud_sdk/agentgateway/user-guide.md
index 67c3b59f..d33629ea 100644
--- a/src/sap_cloud_sdk/agentgateway/user-guide.md
+++ b/src/sap_cloud_sdk/agentgateway/user-guide.md
@@ -157,5 +157,3 @@ class AgentGatewayClient:
         **kwargs,
     ) -> str
 ```
-
-
diff --git a/tests/agent_memory/integration/agentmemory.feature b/tests/agent_memory/integration/agentmemory.feature
index dbe3c566..e6804f2d 100644
--- a/tests/agent_memory/integration/agentmemory.feature
+++ b/tests/agent_memory/integration/agentmemory.feature
@@ -88,4 +88,4 @@ Feature: Agent Memory Service Integration (v1 API)
   Scenario: Filter messages by metadata substring
     Given a message exists with agent "test-agent" invoker "test-user" group "conv-filter" role "USER" content "filter-test-message" and metadata "filter-marker"
     When I list messages filtered by metadata containing "filter-marker"
-    Then the result should contain the message with content "filter-test-message"
\ No newline at end of file
+    Then the result should contain the message with content "filter-test-message"
diff --git a/tests/agent_memory/integration/test_agentmemory_bdd.py b/tests/agent_memory/integration/test_agentmemory_bdd.py
index fb7c4508..41460b68 100644
--- a/tests/agent_memory/integration/test_agentmemory_bdd.py
+++ b/tests/agent_memory/integration/test_agentmemory_bdd.py
@@ -17,6 +17,7 @@
 from pytest_bdd import given, scenario, then, when
 
 from sap_cloud_sdk.agent_memory.client import AgentMemoryClient
+from sap_cloud_sdk.agent_memory import MessageRole
 
 # -- Scenarios -----------------------------------------------------------------
 
@@ -258,7 +259,7 @@ def add_message(context):
         "test-agent",
         "test-user",
         "conv-1",
-        "USER",
+        MessageRole.USER,
         "Hello!",
     )
 
diff --git a/tests/agentgateway/integration/test_agw_bdd.py b/tests/agentgateway/integration/test_agw_bdd.py
index 37704b07..0d6799da 100644
--- a/tests/agentgateway/integration/test_agw_bdd.py
+++ b/tests/agentgateway/integration/test_agw_bdd.py
@@ -101,6 +101,7 @@ def call_get_user_auth(context: ScenarioContext, agw_client: AgentGatewayClient)
 def call_get_user_auth_callable(context: ScenarioContext, agw_client: AgentGatewayClient):
     """Call get_user_auth with a callable and store the result."""
     token = context.user_token
+    assert token is not None
     context.last_result = run(
         agw_client.get_user_auth(user_token=lambda: token)
     )
diff --git a/tests/core/integration/telemetry/_agent.py b/tests/core/integration/telemetry/_agent.py
index df211f74..b44ada81 100644
--- a/tests/core/integration/telemetry/_agent.py
+++ b/tests/core/integration/telemetry/_agent.py
@@ -1,19 +1,9 @@
 """LangGraph test agent used by the telemetry integration tests."""
 
 import os
-from dataclasses import dataclass
-from typing import Annotated
 
 import pytest
 
-from langchain_core.messages import BaseMessage
-from langgraph.graph.message import add_messages
-
-
-@dataclass
-class State:
-    messages: Annotated[list[BaseMessage], add_messages]
-
 
 def build_langgraph_agent():
     """Build a minimal single-node LangGraph agent backed by LiteLLM via AI Core.
@@ -23,11 +13,20 @@ def build_langgraph_agent():
     "sap/<model>" prefix to route through the SAP AI Core provider.
     """
     try:
-        from langchain_litellm import ChatLiteLLM
-        from langgraph.graph import END, StateGraph
+        from dataclasses import dataclass
+        from typing import Annotated
+
+        from langchain_core.messages import BaseMessage
+        from langchain_litellm import ChatLiteLLM  # ty: ignore[unresolved-import]
+        from langgraph.graph import END, StateGraph  # ty: ignore[unresolved-import]
+        from langgraph.graph.message import add_messages  # ty: ignore[unresolved-import]
     except ImportError:
         pytest.skip("langchain-litellm or langgraph not installed")
 
+    @dataclass
+    class State:
+        messages: Annotated[list[BaseMessage], add_messages]
+
     model_name = os.environ.get("AICORE_MODEL") or "anthropic--claude-4.5-sonnet"
     llm = ChatLiteLLM(model=f"sap/{model_name}")
 
diff --git a/tests/core/integration/telemetry/test_telemetry_bdd.py b/tests/core/integration/telemetry/test_telemetry_bdd.py
index aecbc017..d53e1464 100644
--- a/tests/core/integration/telemetry/test_telemetry_bdd.py
+++ b/tests/core/integration/telemetry/test_telemetry_bdd.py
@@ -127,7 +127,7 @@ def _llm_call():
     Uses ChatLiteLLM so Traceloop's LangChain instrumentor fires and emits a span
     with gen_ai.usage.* token counts.
     """
-    from langchain_litellm import ChatLiteLLM
+    from langchain_litellm import ChatLiteLLM  # ty: ignore[unresolved-import]
     from langchain_core.messages import HumanMessage as LCHumanMessage
     model_name = os.environ.get("AICORE_MODEL", "anthropic--claude-4.5-sonnet")
     llm = ChatLiteLLM(model=f"sap/{model_name}")
diff --git a/tests/core/unit/data_anonymization/test_http_transport.py b/tests/core/unit/data_anonymization/test_http_transport.py
index 2b328ca4..afd67c8f 100644
--- a/tests/core/unit/data_anonymization/test_http_transport.py
+++ b/tests/core/unit/data_anonymization/test_http_transport.py
@@ -1,6 +1,7 @@
 """Unit tests for the HTTP transport."""
 
 import base64
+from collections.abc import Mapping
 from pathlib import Path
 import importlib
 import types
@@ -55,7 +56,7 @@ def __init__(
         self.status_code = status_code
         self._json_data = json_data
         self.text = text
-        self.headers = headers or {}
+        self.headers: Mapping[str, str] = headers or {}
         self.content = content
 
     def json(self):
diff --git a/tests/destination/integration/destination.feature b/tests/destination/integration/destination.feature
index 9a489b39..45cbb3ef 100644
--- a/tests/destination/integration/destination.feature
+++ b/tests/destination/integration/destination.feature
@@ -316,4 +316,3 @@ Feature: Destination Service Integration
   #   Then the destination creation should be successful
   #   When I get subaccount destination "test-dest-sub-isolation" with "PROVIDER_ONLY" access strategy
   #   Then the destination should not be found
-
diff --git a/tests/dms/integration/conftest.py b/tests/dms/integration/conftest.py
index 254a83b7..e26d4dec 100644
--- a/tests/dms/integration/conftest.py
+++ b/tests/dms/integration/conftest.py
@@ -14,7 +14,7 @@ def dms_client():
         client = create_client(instance="default")
         return client
     except Exception as e:
-        pytest.skip(f"DMS integration tests require credentials: {e}")  # ty: ignore[invalid-argument-type, too-many-positional-arguments]
+        pytest.skip(f"DMS integration tests require credentials: {e}")
 
 
 def _setup_cloud_mode():
diff --git a/tests/dms/integration/test_dms_bdd.py b/tests/dms/integration/test_dms_bdd.py
index 3abe4e8b..f68753d5 100644
--- a/tests/dms/integration/test_dms_bdd.py
+++ b/tests/dms/integration/test_dms_bdd.py
@@ -128,7 +128,7 @@ def select_version_repo(context: DMSTestContext, dms_client: DMSClient):
             version_repo = r
             break
     if version_repo is None:
-        pytest.skip("No version-enabled repository available")  # ty: ignore[invalid-argument-type, too-many-positional-arguments]
+        pytest.skip("No version-enabled repository available")
     context.repo = version_repo
     context.repo_id = version_repo.id
 
diff --git a/tests/extensibility/unit/test_ums_caching.py b/tests/extensibility/unit/test_ums_caching.py
index 9af3c302..fa1ee6ef 100644
--- a/tests/extensibility/unit/test_ums_caching.py
+++ b/tests/extensibility/unit/test_ums_caching.py
@@ -334,4 +334,3 @@ def test_cache_hit_refreshes_lru_position(self):
             assert ("tenant-new", "default") in transport._cache
         finally:
             patcher.stop()
-
diff --git a/tests/extensibility/unit/test_ums_pagination.py b/tests/extensibility/unit/test_ums_pagination.py
index c79a6edb..39198bf6 100644
--- a/tests/extensibility/unit/test_ums_pagination.py
+++ b/tests/extensibility/unit/test_ums_pagination.py
@@ -340,4 +340,3 @@ def test_missing_page_info_stops_pagination(self):
     def test_max_pages_constant(self):
         """Safety limit constant is 100."""
         assert _MAX_PAGES == 100
-
diff --git a/tests/extensibility/unit/test_ums_parsing.py b/tests/extensibility/unit/test_ums_parsing.py
index 542e9720..0cb2af6b 100644
--- a/tests/extensibility/unit/test_ums_parsing.py
+++ b/tests/extensibility/unit/test_ums_parsing.py
@@ -459,4 +459,3 @@ def test_tools_key_missing(self):
         }
         result = _transform_ums_response(data, "default")
         assert result.mcp_servers == []
-