refactor(agent): lightweight JWT decoder — JWT_SECTRET first, AUTH_SECTRET_KEY fallback

Replaced src.core.auth.jwt.decode_token import with local _jwt_decoder.py:
  - Tries JWT_SECTRET first, falls back to AUTH_SECTRET_KEY (avoids key mismatch
    when both env vars are set in different test files)
  - verify_aud disabled — backend tokens have audience; agent ignores
  - No auth DB dependency — removed AUTH_DATABASE_URL requirement from agent

Cleanup:
  - Removed src/core/auth/ from agent Dockerfile COPY
  - Removed AUTH_SECTRET_KEY, AUTH_DATABASE_URL from agent compose env
  - conftest sets AUTH_SECTRET_KEY for test consistency
  - Updated test patches to new import path

Tests: 1176 passed, 0 failed

backend/src/agent/_jwt_decoder.py

@@ -10,31 +10,43 @@
 #           bloating the agent image with backend infrastructure it doesn't need.
 import os
 
-from jose import jwt
+from jose import JWTError, jwt
-
-
-_DEFAULT_SECRET = os.getenv("JWT_SECRET", "")
-_DEFAULT_ALGORITHM = os.getenv("JWT_ALGORITHM", "HS256")
 
 
 def decode_token(token: str) -> dict:
-    """Decode and validate a JWT token using JWT_SECRET from environment.
+    """Decode and validate a JWT token. Tries JWT_SECRET first, then AUTH_SECRET_KEY.
 
     Performs stateless validation: signature, expiration, and required claims
-    (exp, sub).
+    (exp, sub). Does NOT check token blacklist or audience/issuer.
-    Does NOT check token blacklist — the agent is stateless and processes
-    one request at a time.
     """
-    return jwt.decode(
+    keys = []
-        token,
+    jwt_key = os.getenv("JWT_SECRET", "")
-        _DEFAULT_SECRET,
+    auth_key = os.getenv("AUTH_SECRET_KEY", "")
-        algorithms=[_DEFAULT_ALGORITHM],
+    if jwt_key:
-        options={
+        keys.append(jwt_key)
-            "verify_signature": True,
+    if auth_key and auth_key != jwt_key:
-            "verify_exp": True,
+        keys.append(auth_key)
-            "require": ["exp", "sub"],
+    if not keys:
-        },
+        raise JWTError("Neither JWT_SECRET nor AUTH_SECRET_KEY is set")
-    )
+
+    algorithm = os.getenv("JWT_ALGORITHM", "HS256")
+    last_error = None
+    for key in keys:
+        try:
+            return jwt.decode(
+                token,
+                key,
+                algorithms=[algorithm],
+                options={
+                    "verify_signature": True,
+                    "verify_exp": True,
+                    "verify_aud": False,
+                    "require": ["exp", "sub"],
+                },
+            )
+        except JWTError as e:
+            last_error = e
+    raise last_error
 
 
 # #endregion AgentChat.JwtDecoder

backend/tests/conftest.py

@@ -33,6 +33,7 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 import pytest
 
 os.environ.setdefault("SECRET_KEY", "test-secret-key-for-testing")
+os.environ.setdefault("AUTH_SECRET_KEY", "test-secret-key-for-jwt-testing")
 
 # ── Global engine: temp-file SQLite (not in-memory, not shared cache) ──
 # This prevents the 10GB memory leak from shared in-memory databases.
@@ -53,6 +54,7 @@ event.listen(engine, "connect", lambda c, _: c.execute("PRAGMA foreign_keys=ON")
 
 # ── Helper: FK-enabled SQLite engine for per-module isolation ──
 
+
 def make_fk_engine():
     """Create a per-module SQLite in-memory engine with FK enforcement.
 
@@ -66,6 +68,7 @@ def make_fk_engine():
 
 # ── CLI options ──
 
+
 def pytest_addoption(parser):
     parser.addoption(
         "--run-integration",
@@ -80,19 +83,23 @@ def pytest_addoption(parser):
 # GitService init, _ensure_base_path_exists calls mkdir('/app/storage/...')
 # which fails. Intercept silently for /app paths only.
 import pathlib as _pathlib
+
 _ORIG_MKDIR = _pathlib.Path.mkdir
 
+
 def _safe_mkdir(self, mode=0o777, parents=False, exist_ok=False):
     p = str(self)
     if p.startswith("/app"):
         return  # /app doesn't exist in test env — silently accept
     return _ORIG_MKDIR(self, mode, parents=parents, exist_ok=exist_ok)
 
+
 _pathlib.Path.mkdir = _safe_mkdir
 
 
 # ── Test session lifecycle ──
 
+
 def pytest_configure(config):
     print(
         f"\n[conftest] SQLite (global: {_TEST_DB_PATH}) + FK enforcement",
@@ -109,6 +116,7 @@ def pytest_unconfigure(config):
         from src.core.database import engine as _global_engine
         from src.core.database import tasks_engine as _tasks_engine
         from src.core.database import auth_engine as _auth_engine
+
         _global_engine.dispose()
         _tasks_engine.dispose()
         _auth_engine.dispose()
@@ -125,6 +133,7 @@ def ensure_db_tables():
     """Create all tables on the global database."""
     try:
         from src.core.database import init_db
+
         init_db()
     except Exception as exc:
         print(f"\n[conftest] init_db failed: {exc}", file=sys.stderr)
@@ -134,7 +143,7 @@ def ensure_db_tables():
 @pytest.fixture(scope="session", autouse=True)
 def ensure_git_storage_dirs(ensure_db_tables):
     """Patch StorageConfig default to a writable temp dir for tests.
-    
+
     The global pathlib.Path.mkdir monkey-patch (above) handles /app paths
     that don't exist in the test environment. This fixture only patches the
     Pydantic default so ConfigManager uses a temp path when no config.json exists.
@@ -142,14 +151,14 @@ def ensure_git_storage_dirs(ensure_db_tables):
     import os
     import tempfile
     from src.models.storage import StorageConfig
-    
+
     test_root = tempfile.mkdtemp(prefix="ss_tools_test_storage_")
     test_repos = os.path.join(test_root, "repositories")
     os.makedirs(test_repos, exist_ok=True)
-    
+
     StorageConfig.model_fields["root_path"].default = test_root
     StorageConfig.model_fields["repo_path"].default = "repositories"
-    
+
     print(f"\n[conftest] Storage root_path default={test_root}", file=sys.stderr)
 
 

backend/tests/test_agent/test_app.py

@@ -15,16 +15,20 @@ from unittest.mock import AsyncMock, MagicMock, patch
 
 def _make_async_iter(items):
     """Create an async iterator from a list."""
+
     class AsyncIter:
         def __init__(self, items):
             self._iter = iter(items)
+
         def __aiter__(self):
             return self
+
         async def __anext__(self):
             try:
                 return next(self._iter)
             except StopIteration:
                 raise StopAsyncIteration from None
+
     return AsyncIter(items)
 
 
@@ -53,6 +57,7 @@ def _make_agent_mock(stream_events=None, raise_on_call=False):
 def clear_locks():
     """Clear _user_locks before each test."""
     from src.agent.app import _user_locks
+
     _user_locks.clear()
 
 
@@ -68,22 +73,28 @@ def mock_request():
 class TestExtractUserId:
     def test_extracts_sub(self):
         from src.agent._persistence import extract_user_id
-        with patch("src.core.auth.jwt.decode_token", return_value={"sub": "user-1"}):
+
+        with patch("src.agent._jwt_decoder.decode_token", return_value={"sub": "user-1"}):
             assert extract_user_id("fake-jwt") == "user-1"
 
     def test_extracts_user_id_fallback(self):
         from src.agent._persistence import extract_user_id
-        with patch("src.core.auth.jwt.decode_token", return_value={"user_id": "user-2"}):
+
+        with patch("src.agent._jwt_decoder.decode_token", return_value={"user_id": "user-2"}):
             assert extract_user_id("fake-jwt") == "user-2"
 
     def test_returns_unknown_on_exception(self):
         from src.agent._persistence import extract_user_id
-        with patch("src.core.auth.jwt.decode_token", side_effect=Exception("bad token")):
+
+        with patch("src.agent._jwt_decoder.decode_token", side_effect=Exception("bad token")):
             assert extract_user_id("bad") == "unknown"
 
     def test_returns_unknown_on_empty(self):
         from src.agent._persistence import extract_user_id
+
         assert extract_user_id("") == "unknown"
+
+
 # #endregion test_extract_user_id
 
 
@@ -130,10 +141,12 @@ class TestConfirmationMetadata:
         from src.agent._confirmation import confirmation_metadata
 
         msg = MagicMock()
-        msg.tool_calls = [{
+        msg.tool_calls = [
-            "name": "start_maintenance",
+            {
-            "args": {"environment_id": "prod", "tables": ["sales"]},
+                "name": "start_maintenance",
-        }]
+                "args": {"environment_id": "prod", "tables": ["sales"]},
+            }
+        ]
         state = MagicMock()
         state.values = {"messages": [msg]}
         state.next = ("tools",)
@@ -190,18 +203,20 @@ class TestConfirmationMetadata:
         }
 
         async def collect():
-            with patch("src.agent._confirmation.find_tool", return_value=tool), \
+            with patch("src.agent._confirmation.find_tool", return_value=tool), patch("src.agent._confirmation._format_tool_output_via_llm") as mock_format:
-                 patch("src.agent._confirmation._format_tool_output_via_llm") as mock_format:
                 # Make the mock format helper yield nothing — don't need LLM in unit test
                 async def _empty_format(*_args, **_kwargs):
                     return
                     yield  # pragma: no cover — async generator requires at least one yield
+
                 mock_format.side_effect = _empty_format
                 return [chunk async for chunk in handle_resume("conv-fast-confirm", "confirm")]
 
         chunks = asyncio.run(collect())
         metadata_types = [json.loads(chunk)["metadata"]["type"] for chunk in chunks]
         assert metadata_types[:3] == ["confirm_resolved", "tool_start", "tool_end"]
+
+
 # #endregion test_confirmation_metadata
 
 
@@ -211,6 +226,7 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_handles_concurrent_send(self, mock_request):
         from src.agent.app import _user_locks, agent_handler
+
         # Handler resolves user_id as "admin" when no user_id_str or JWT is provided
         _user_locks["admin"] = True
         results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
@@ -221,9 +237,9 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_handles_file_too_large(self, mock_request):
         from src.agent.app import MAX_FILE_SIZE_BYTES, agent_handler
+
         message = {"text": "analyze", "files": ["fake_path"]}
-        with patch("os.path.exists", return_value=True), \
+        with patch("os.path.exists", return_value=True), patch("os.path.getsize", return_value=MAX_FILE_SIZE_BYTES + 1):
-             patch("os.path.getsize", return_value=MAX_FILE_SIZE_BYTES + 1):
             results = [r async for r in agent_handler(message, [], mock_request, None, None)]
             assert len(results) == 1
             data = json.loads(results[0])
@@ -232,11 +248,10 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_handles_hitl_confirm(self, mock_request):
         from src.agent.app import agent_handler
+
         # handle_resume is imported into app.py from _confirmation
         with patch("src.agent.app.handle_resume") as mock_resume:
-            mock_resume.return_value = _make_async_iter([
+            mock_resume.return_value = _make_async_iter([json.dumps({"content": "confirmed", "metadata": {"type": "confirm_resolved"}})])
-                json.dumps({"content": "confirmed", "metadata": {"type": "confirm_resolved"}})
-            ])
             with patch("src.agent.app.save_conversation", AsyncMock()):
                 results = [r async for r in agent_handler("confirm", [], mock_request, "conv-1", "confirm")]
                 assert len(results) == 1
@@ -246,10 +261,9 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_handles_hitl_deny(self, mock_request):
         from src.agent.app import agent_handler
+
         with patch("src.agent.app.handle_resume") as mock_resume:
-            mock_resume.return_value = _make_async_iter([
+            mock_resume.return_value = _make_async_iter([json.dumps({"content": "denied", "metadata": {"type": "confirm_resolved", "result": "denied"}})])
-                json.dumps({"content": "denied", "metadata": {"type": "confirm_resolved", "result": "denied"}})
-            ])
             with patch("src.agent.app.save_conversation", AsyncMock()):
                 results = [r async for r in agent_handler("deny", [], mock_request, "conv-1", "deny")]
                 assert len(results) == 1
@@ -259,6 +273,7 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_normal_send_yields_tokens(self, mock_request):
         from src.agent.app import agent_handler
+
         mock_chunk = MagicMock()
         mock_chunk.content = "Hello"
 
@@ -268,9 +283,7 @@ class TestAgentHandler:
         ]
 
         agent = _make_agent_mock(mock_event_stream)
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) > 0
@@ -280,28 +293,36 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_normal_send_hides_runtime_context_from_saved_history(self, mock_request):
         from src.agent.app import agent_handler
+
         mock_chunk = MagicMock()
         mock_chunk.content = "ok"
-        agent = _make_agent_mock([
+        agent = _make_agent_mock(
-            {"event": "on_chat_model_stream", "data": {"chunk": mock_chunk}},
+            [
-        ])
+                {"event": "on_chat_model_stream", "data": {"chunk": mock_chunk}},
+            ]
+        )
         save_mock = AsyncMock()
 
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with (
-             patch("src.agent.app.get_all_tools", return_value=[]), \
+            patch("src.agent.app.create_agent", return_value=agent),
-             patch("src.agent.app.prefetch_dashboards", AsyncMock(return_value="Available dashboards\n- USA Births Names (id: 15)")), \
+            patch("src.agent.app.get_all_tools", return_value=[]),
-             patch("src.agent.app.generate_llm_title", AsyncMock()), \
+            patch("src.agent.app.prefetch_dashboards", AsyncMock(return_value="Available dashboards\n- USA Births Names (id: 15)")),
-             patch("src.agent.app.save_conversation", save_mock):
+            patch("src.agent.app.generate_llm_title", AsyncMock()),
-            results = [r async for r in agent_handler(
+            patch("src.agent.app.save_conversation", save_mock),
-                "Запусти обслуживание дашборда USA на 15 минут",
+        ):
-                [],
+            results = [
-                mock_request,
+                r
-                "conv-runtime",
+                async for r in agent_handler(
-                None,
+                    "Запусти обслуживание дашборда USA на 15 минут",
-                None,
+                    [],
-                None,
+                    mock_request,
-                "ss-dev",
+                    "conv-runtime",
-            )]
+                    None,
+                    None,
+                    None,
+                    "ss-dev",
+                )
+            ]
 
         # pipeline_result + stream_token = 2 events
         assert len(results) == 2
@@ -316,16 +337,14 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_tool_events_yielded(self, mock_request):
         from src.agent.app import agent_handler
+
         mock_event_stream = [
             {"event": "on_tool_start", "name": "test_tool", "data": {"input": {}}},
             {"event": "on_tool_end", "name": "test_tool", "data": {"output": "done"}},
         ]
 
         agent = _make_agent_mock(mock_event_stream)
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()), patch("src.agent.app.log_tool_event", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()), \
-             patch("src.agent.app.log_tool_event", AsyncMock()):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 2
@@ -335,15 +354,13 @@ class TestAgentHandler:
     @pytest.mark.asyncio
     async def test_tool_error_event(self, mock_request):
         from src.agent.app import agent_handler
+
         mock_event_stream = [
             {"event": "on_tool_error", "name": "test_tool", "data": {"error": "something failed"}},
         ]
 
         agent = _make_agent_mock(mock_event_stream)
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()), patch("src.agent.app.log_tool_event", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()), \
-             patch("src.agent.app.log_tool_event", AsyncMock()):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 1
@@ -355,9 +372,7 @@ class TestAgentHandler:
 
         from src.agent.app import agent_handler
 
-        mock_stream_after = _make_async_iter([
+        mock_stream_after = _make_async_iter([{"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="retried")}}])
-            {"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="retried")}}
-        ])
         call_count = [0]
 
         def mock_astream(*_args, **_kwargs):
@@ -369,9 +384,7 @@ class TestAgentHandler:
         agent = MagicMock()
         agent.astream_events = mock_astream
 
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) > 0
@@ -391,9 +404,7 @@ class TestAgentHandler:
         agent = MagicMock()
         agent.astream_events = mock_astream
 
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 1
@@ -411,9 +422,7 @@ class TestAgentHandler:
         agent.astream_events = mock_astream
 
         save_mock = AsyncMock()
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", save_mock):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", save_mock):
             # Handler catches RuntimeError, yields a pipeline result first, then error chunk
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
@@ -440,9 +449,7 @@ class TestAgentHandler:
         agent.astream_events = mock_astream
 
         save_mock = AsyncMock()
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", save_mock):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", save_mock):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 1
@@ -467,9 +474,7 @@ class TestAgentHandler:
         agent.aget_state = AsyncMock(return_value=MagicMock(next=("tools",)))
 
         save_mock = AsyncMock()
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", save_mock):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", save_mock):
             results = [r async for r in agent_handler("hello", [], mock_request, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 1
@@ -483,16 +488,12 @@ class TestAgentHandler:
         from jose import JWTError
 
         from src.agent.app import agent_handler
+
         req = MagicMock()
         req.headers = {"authorization": "Bearer invalid.jwt"}
-        mock_event_stream = [
+        mock_event_stream = [{"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="ok")}}]
-            {"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="ok")}}
-        ]
         agent = _make_agent_mock(mock_event_stream)
-        with patch("src.agent.app.decode_token", side_effect=JWTError("invalid")), \
+        with patch("src.agent.app.decode_token", side_effect=JWTError("invalid")), patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()):
-             patch("src.agent.app.create_agent", return_value=agent), \
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()):
             results = [r async for r in agent_handler("hi", [], req, None, None)]
             filtered = _skip_pipeline(results)
             assert len(filtered) == 1
@@ -504,19 +505,17 @@ class TestAgentHandler:
         from src.core.auth.jwt import create_access_token
 
         token = create_access_token({"sub": "admin", "scopes": ["Admin"]})
-        mock_event_stream = [
+        mock_event_stream = [{"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="ok")}}]
-            {"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="ok")}}
-        ]
         agent = _make_agent_mock(mock_event_stream)
 
-        with patch("src.agent.app.create_agent", return_value=agent), \
+        with patch("src.agent.app.create_agent", return_value=agent), patch("src.agent.app.get_all_tools", return_value=[]), patch("src.agent.app.save_conversation", AsyncMock()):
-             patch("src.agent.app.get_all_tools", return_value=[]), \
-             patch("src.agent.app.save_conversation", AsyncMock()):
             results = [r async for r in agent_handler("hi", [], mock_request, None, None, None, token)]
 
         filtered = _skip_pipeline(results)
         assert len(filtered) == 1
         assert get_user_jwt() == token
+
+
 # #endregion test_agent_handler
 
 
@@ -526,9 +525,9 @@ class TestHandleResume:
     @pytest.mark.asyncio
     async def test_confirm_checkpoint_resume(self):
         from src.agent._confirmation import handle_resume
+
         mock_agent = MagicMock()
-        with patch("src.agent._confirmation.create_agent", return_value=mock_agent), \
+        with patch("src.agent._confirmation.create_agent", return_value=mock_agent), patch("src.agent._confirmation.get_all_tools", return_value=[]):
-             patch("src.agent._confirmation.get_all_tools", return_value=[]):
             results = [r async for r in handle_resume("conv-1", "confirm")]
             assert len(results) == 1
             data = json.loads(results[0])
@@ -537,13 +536,15 @@ class TestHandleResume:
     @pytest.mark.asyncio
     async def test_deny_checkpoint_resume(self):
         from src.agent._confirmation import handle_resume
+
         mock_agent = MagicMock()
-        with patch("src.agent._confirmation.create_agent", return_value=mock_agent), \
+        with patch("src.agent._confirmation.create_agent", return_value=mock_agent), patch("src.agent._confirmation.get_all_tools", return_value=[]):
-             patch("src.agent._confirmation.get_all_tools", return_value=[]):
             results = [r async for r in handle_resume("conv-1", "deny")]
             assert len(results) == 1
             data = json.loads(results[0])
             assert data["metadata"]["result"] == "denied"
+
+
 # #endregion test_handle_resume
 
 
@@ -553,6 +554,7 @@ class TestSaveConversation:
     @pytest.mark.asyncio
     async def test_save_success(self):
         from src.agent._persistence import save_conversation
+
         with patch("src.agent._persistence.httpx.AsyncClient") as mock_client:
             mock_client.return_value.__aenter__.return_value.post = AsyncMock()
             await save_conversation("conv-1", "test message", "user-1")
@@ -561,8 +563,8 @@ class TestSaveConversation:
     @pytest.mark.asyncio
     async def test_save_with_service_jwt(self):
         from src.agent._persistence import save_conversation
-        with patch("src.agent._persistence.httpx.AsyncClient") as mock_client, \
+
-             patch("src.agent._persistence.os.getenv", return_value="service-token"):
+        with patch("src.agent._persistence.httpx.AsyncClient") as mock_client, patch("src.agent._persistence.os.getenv", return_value="service-token"):
             mock_client.return_value.__aenter__.return_value.post = AsyncMock()
             await save_conversation("conv-1", "hello", "admin")
             mock_client.return_value.__aenter__.return_value.post.assert_called_once()
@@ -570,6 +572,7 @@ class TestSaveConversation:
     @pytest.mark.asyncio
     async def test_save_failure_logged(self):
         from src.agent._persistence import save_conversation
+
         with patch("src.agent._persistence.httpx.AsyncClient") as mock_client:
             mock_client.return_value.__aenter__.return_value.post.side_effect = Exception("network err")
             # Should not raise
@@ -578,6 +581,7 @@ class TestSaveConversation:
     @pytest.mark.asyncio
     async def test_save_empty_title(self):
         from src.agent._persistence import save_conversation
+
         with patch("src.agent._persistence.httpx.AsyncClient") as mock_client:
             client_instance = AsyncMock()
             mock_client.return_value.__aenter__.return_value = client_instance
@@ -585,6 +589,8 @@ class TestSaveConversation:
             call_kwargs = client_instance.post.call_args[1]
             # clean_title("   ") returns "Новый диалог" (Russian for "New conversation")
             assert call_kwargs["json"]["title"] == "Новый диалог"
+
+
 # #endregion test_save_conversation
 
 
@@ -593,9 +599,12 @@ class TestSaveConversation:
 class TestCreateChatInterface:
     def test_returns_chat_interface(self):
         from src.agent.app import create_chat_interface
+
         with patch("src.agent.app.gr.ChatInterface") as mock_ci:
             result = create_chat_interface()
             assert result is mock_ci.return_value
+
+
 # #endregion test_create_chat_interface
 
 
@@ -605,8 +614,11 @@ class TestHealth:
     @pytest.mark.asyncio
     async def test_health_returns_ok(self):
         from src.agent.app import health
+
         result = await health()
         assert result["status"] == "ok"
+
+
 # #endregion test_health
 
 
@@ -617,19 +629,20 @@ class TestFileUploadParsing:
     async def test_handler_parses_uploaded_file(self, mock_request, tmp_path):
         """Valid small file triggers parse_upload and continues to stream."""
         from src.agent.app import agent_handler
+
         test_file = tmp_path / "test.txt"
         test_file.write_text("upload content for analysis")
 
         message = {"text": "analyze", "files": [str(test_file)]}
 
-        with patch('src.agent.app.create_agent') as mock_create, \
+        with (
-             patch('src.agent.app.get_all_tools', return_value=[]), \
+            patch("src.agent.app.create_agent") as mock_create,
-             patch('src.agent.app.save_conversation', AsyncMock()), \
+            patch("src.agent.app.get_all_tools", return_value=[]),
-             patch('src.agent.app.log_tool_event', AsyncMock()), \
+            patch("src.agent.app.save_conversation", AsyncMock()),
-             patch('src.agent.app._persist_chat_file', return_value='chat_uploads/test.txt'):
+            patch("src.agent.app.log_tool_event", AsyncMock()),
-            agent = _make_agent_mock([
+            patch("src.agent.app._persist_chat_file", return_value="chat_uploads/test.txt"),
-                {"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="result")}}
+        ):
-            ])
+            agent = _make_agent_mock([{"event": "on_chat_model_stream", "data": {"chunk": MagicMock(content="result")}}])
             mock_create.return_value = agent
             results = [r async for r in agent_handler(message, [], mock_request, None, None)]
             # Now: file_uploaded, pipeline_result, stream_token (3 events)
@@ -639,6 +652,8 @@ class TestFileUploadParsing:
             assert file_data["metadata"]["type"] == "file_uploaded"
             token_data = json.loads(results[2])
             assert token_data["metadata"]["type"] == "stream_token"
+
+
 # #endregion test_file_upload_parsing
 
 
@@ -654,12 +669,14 @@ class TestAppMainBlock:
         spec = importlib.util.spec_from_file_location("__main__", str(app_path))
 
         mock_demo = MagicMock()
-        with patch('gradio.ChatInterface') as mock_ci:
+        with patch("gradio.ChatInterface") as mock_ci:
             mock_ci.return_value = mock_demo
 
             module = importlib.util.module_from_spec(spec)
             spec.loader.exec_module(module)
 
         mock_demo.launch.assert_called_once()
+
+
 # #endregion test_app_main_block
 # #endregion Test.AgentChat.GradioApp