diff --git a/.github/workflows/README.md b/.github/workflows/README.md
index f64f95c..f88495c 100644
--- a/.github/workflows/README.md
+++ b/.github/workflows/README.md
@@ -14,7 +14,8 @@ Studio 的持续集成和持续部署工作流。
 - 手动触发 (workflow_dispatch)
 
 **测试矩阵**:
-- Python 3.10, 3.11
+<!-- - Python 3.10, 3.11 -->
+- Python 3.11
 - 单元测试 + 集成测试
 
 **测试步骤**:
diff --git a/.github/workflows/ci-test.yml b/.github/workflows/ci-test.yml
index bb67d3c..8f629da 100644
--- a/.github/workflows/ci-test.yml
+++ b/.github/workflows/ci-test.yml
@@ -49,7 +49,8 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.10', '3.11']
+        # python-version: ['3.10', '3.11']
+        python-version: ['3.11']
 
     env:
       HF_TOKEN: ${{ secrets.HF_TOKEN }}
@@ -67,16 +68,26 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
+          cache-dependency-path: 'pyproject.toml'
 
       - name: Install system dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y build-essential
 
-      - name: Install Python dependencies
+      - name: Install CI test dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -e ".[dev]"
+          python -m pip install --no-cache-dir -r requirements-ci.txt
+
+      - name: Verify key dependencies
+        run: |
+          python -c "from jose import JWTError, jwt; print('jose OK')"
+          python -c "from passlib.context import CryptContext; print('passlib OK')"
+          python -c "import fastapi; print('fastapi OK')"
+
+      - name: Install package (best-effort, private deps may be unavailable)
+        run: python -m pip install --no-cache-dir -e ".[dev]" || true
 
       - name: Run unit tests
         if: ${{ github.event.inputs.test_type == 'unit' || github.event.inputs.test_type == 'all' || github.event.inputs.test_type == '' }}
@@ -123,11 +134,12 @@ jobs:
         with:
           python-version: '3.11'
           cache: 'pip'
+          cache-dependency-path: 'pyproject.toml'
 
       - name: Install dependencies
         run: |
           pip install --upgrade pip
-          pip install -e ".[dev]"
+          pip install --no-cache-dir -e ".[dev]"
 
       - name: Run LLM 集成测试 (CPU backend)
         run: |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d12694..7adac8f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,7 +28,8 @@ Source: `https://pypi.org/pypi/isage-studio/json` (checked on 2026-02-14, UTC).
 
 ### Added
 - CI/CD workflow for automated testing (`.github/workflows/ci-test.yml`)
-  - Unit tests on Python 3.10 and 3.11
+  <!-- - Unit tests on Python 3.10 and 3.11 -->
+  - Unit tests on Python 3.11
   - Integration tests with CPU backend
   - E2E tests for LLM integration
   - Code quality checks (Ruff, Mypy)
diff --git a/README.md b/README.md
index 81acc0e..65a023c 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,8 @@ Studio 采用**前后端分离**架构，直接接入 SAGE 核心引擎：
 
 ### Environment Requirements
 
-- **Python**: 3.10+ (必需)
+<!-- - **Python**: 3.10+ (必需) -->
+- **Python**: 3.11+ (必需)
 - **Node.js**: 18+ (推荐 LTS)
 - **SAGE**: 完整安装 (包括 kernel, middleware, libs)
 
@@ -525,7 +526,8 @@ React 18.2 + TypeScript 5.2
 #### 后端
 
 ```
-FastAPI + Python 3.10+
+<!-- FastAPI + Python 3.10+ -->
+FastAPI + Python 3.11+
 ├── Pydantic 2.0            # 数据验证
 ├── Uvicorn                 # ASGI 服务器
 ├── sage-kernel             # Environment, DataStream API
@@ -870,7 +872,8 @@ sage studio start --dev
 
 ```bash
 # 检查 Python 版本
-python --version  # 需要 3.10+
+# python --version  # 需要 3.10+
+python --version  # 需要 3.11+
 
 # 检查 SAGE 安装
 pip list | grep isage
diff --git a/pyproject.toml b/pyproject.toml
index 16e8ecf..10ca8c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,8 @@ name = "isage-studio"
 dynamic = ["version"]
 description = "SAGE Studio - Visual workflow builder and LLM playground for SAGE AI pipelines"
 readme = "README.md"
-requires-python = ">=3.10"
+# requires-python = ">=3.10"
+requires-python = ">=3.11"
 authors = [{ name = "IntelliStream Team", email = "shuhao_zhang@hust.edu.cn" }]
 keywords = [
     "sage",
@@ -74,15 +75,8 @@ dependencies = [
     # SAGE kernel integration (includes sage.middleware.* pipeline layer)
     "isage-kernel>=0.2.5.0",
     "isage-vida>=0.1.0",
-]
-
-license = { text = "MIT" }
 
-[project.optional-dependencies]
-full = [
-    # Continual-learning / coreset selection for tool-use features
-    "isage-sias>=0.1.0",
-    # Backend API / auth / config helpers (optional for lightweight studio installs)
+    # Backend API / auth / config helpers (required by services layer)
     "aiofiles>=23.0.0",
     "configparser>=5.3.0",
     "markdown>=3.4.4,<4.0.0",
@@ -92,11 +86,25 @@ full = [
     "structlog>=23.0.0",
 ]
 
+license = { text = "MIT" }
+
+[project.optional-dependencies]
+full = [
+    # Continual-learning / coreset selection for tool-use features
+    "isage-sias>=0.1.0",
+]
+
 dev = [
     "pytest>=7.4.0",
     "pytest-asyncio>=0.21.0",
-    "ruff==0.15.4",
+    "ruff==0.15.8",
     "isage-pypi-publisher>=0.2.1.0",
+    # Auth/backend deps required by unit tests (duplicated from core for CI reliability)
+    "python-jose[cryptography]>=3.5.0,<4.0.0",
+    "passlib[argon2]>=1.7.4,<2.0.0",
+    "aiofiles>=23.0.0",
+    "pydantic-settings>=2.0.0",
+    "structlog>=23.0.0",
 ]
 
 [project.urls]
@@ -143,7 +151,8 @@ version = { attr = "sage.studio._version.__version__" }
 # Development tools configuration
 [tool.black]
 line-length = 100
-target-version = ["py310", "py311", "py312"]
+# target-version = ["py310", "py311", "py312"]
+target-version = ["py311", "py312"]
 include = '\.pyi?$'
 
 [tool.isort]
@@ -187,7 +196,8 @@ filterwarnings = [
 
 [tool.ruff]
 line-length = 100
-target-version = "py310"
+# target-version = "py310"
+target-version = "py311"
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "I", "N", "UP"]
diff --git a/quickstart.sh b/quickstart.sh
index 114a191..326a57e 100755
--- a/quickstart.sh
+++ b/quickstart.sh
@@ -83,10 +83,13 @@ fi
 echo -e "${YELLOW}${BOLD}Step 1/3: Checking Python environment${NC}"
 PYTHON_VERSION=$(python3 -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')" 2>/dev/null || echo "unknown")
 echo -e "  Python version: ${CYAN}${PYTHON_VERSION}${NC}"
-if python3 -c "import sys; exit(0 if sys.version_info >= (3,10) else 1)" 2>/dev/null; then
-    echo -e "  ${GREEN}✓ Python ≥ 3.10${NC}"
+# if python3 -c "import sys; exit(0 if sys.version_info >= (3,10) else 1)" 2>/dev/null; then
+if python3 -c "import sys; exit(0 if sys.version_info >= (3,11) else 1)" 2>/dev/null; then
+    # echo -e "  ${GREEN}✓ Python ≥ 3.10${NC}"
+    echo -e "  ${GREEN}✓ Python ≥ 3.11${NC}"
 else
-    echo -e "  ${RED}✗ Python 3.10+ required (found ${PYTHON_VERSION})${NC}"
+    # echo -e "  ${RED}✗ Python 3.10+ required (found ${PYTHON_VERSION})${NC}"
+    echo -e "  ${RED}✗ Python 3.11+ required (found ${PYTHON_VERSION})${NC}"
     exit 1
 fi
 echo ""
diff --git a/requirements-ci.txt b/requirements-ci.txt
new file mode 100644
index 0000000..ea8bffd
--- /dev/null
+++ b/requirements-ci.txt
@@ -0,0 +1,31 @@
+# CI test requirements - public PyPI packages only
+# Used by GitHub Actions to bootstrap test environment independently
+# of private SAGE packages (isage, isagellm, etc.)
+
+# Test framework
+pytest>=7.4.0
+pytest-asyncio>=0.21.0
+
+# Auth (required by services/auth_service.py)
+python-jose[cryptography]>=3.5.0,<4.0.0
+passlib[argon2]>=1.7.4,<2.0.0
+
+# Backend API
+pydantic[email]>=2.10.0,<3.0.0
+pydantic-settings>=2.0.0
+fastapi>=0.115.0,<1.0.0
+starlette>=0.40,<0.53
+uvicorn[standard]>=0.34.0,<1.0.0
+httpx>=0.28.0,<1.0.0
+python-multipart>=0.0.6
+websockets>=11.0
+
+# Utilities
+aiofiles>=23.0.0
+configparser>=5.3.0
+markdown>=3.4.4,<4.0.0
+structlog>=23.0.0
+jinja2>=3.1.0,<4.0.0
+markupsafe>=2.0.1
+PyYAML>=6.0.1
+packaging>=24.0,<27.0
diff --git a/src/sage/studio/_version.py b/src/sage/studio/_version.py
index 57d195e..aa627d9 100644
--- a/src/sage/studio/_version.py
+++ b/src/sage/studio/_version.py
@@ -1,6 +1,6 @@
 """Version information for sage-studio package."""
 
 # 独立硬编码版本
-__version__ = "0.2.4.37"
+__version__ = "0.2.4.44"
 __author__ = "IntelliStream Team"
 __email__ = "shuhao_zhang@hust.edu.cn"
diff --git a/src/sage/studio/api/auth.py b/src/sage/studio/api/auth.py
index 000ed8b..5ee77ae 100644
--- a/src/sage/studio/api/auth.py
+++ b/src/sage/studio/api/auth.py
@@ -7,7 +7,7 @@
 
 from __future__ import annotations
 
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 from fastapi import APIRouter
 from pydantic import BaseModel
@@ -26,7 +26,7 @@ class TokenResponse(BaseModel):
 
 
 def _now_iso() -> str:
-    return datetime.now(timezone.utc).isoformat()
+    return datetime.now(UTC).isoformat()
 
 
 def build_auth_router() -> APIRouter:
diff --git a/src/sage/studio/api/canvas.py b/src/sage/studio/api/canvas.py
index 49a2135..59a33d6 100644
--- a/src/sage/studio/api/canvas.py
+++ b/src/sage/studio/api/canvas.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import json
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from pathlib import Path
 from typing import Any
 
@@ -144,8 +144,8 @@ async def publish_canvas_graph_route(
                 "metadata": req.metadata,
                 "params_schema": {},
                 "dataset_requirements": {},
-                "created_at": datetime.now(timezone.utc).isoformat(),
-                "updated_at": datetime.now(timezone.utc).isoformat(),
+                "created_at": datetime.now(UTC).isoformat(),
+                "updated_at": datetime.now(UTC).isoformat(),
             },
             compiled_payload=compiled_payload,
         )
@@ -184,7 +184,7 @@ async def export_flow(flow_id: str):
 
         export_data = {
             "version": "1.0.0",
-            "exportTime": str(datetime.now(timezone.utc)),
+            "exportTime": str(datetime.now(UTC)),
             "flowId": flow_id,
             "flow": flow_data,
         }
diff --git a/src/sage/studio/contracts/models.py b/src/sage/studio/contracts/models.py
index af85035..f8ce4a6 100644
--- a/src/sage/studio/contracts/models.py
+++ b/src/sage/studio/contracts/models.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
-from datetime import datetime, timezone
-from enum import Enum
+from datetime import UTC, datetime
+from enum import StrEnum
 from typing import Any
 
 from pydantic import BaseModel, ConfigDict, Field
@@ -9,13 +9,13 @@
 CONTRACT_SCHEMA_VERSION = "v1"
 
 
-class RunKind(str, Enum):
+class RunKind(StrEnum):
     CHAT = "chat"
     EXPERIMENT = "experiment"
     SWARM = "swarm"
 
 
-class StageEventState(str, Enum):
+class StageEventState(StrEnum):
     CREATED = "created"
     QUEUED = "queued"
     RUNNING = "running"
@@ -24,7 +24,7 @@ class StageEventState(str, Enum):
     CANCELLED = "cancelled"
 
 
-class ArtifactKind(str, Enum):
+class ArtifactKind(StrEnum):
     INPUT = "input"
     OUTPUT = "output"
     LOG = "log"
@@ -39,7 +39,7 @@ class RunRef(BaseModel):
     request_id: str
     workspace_id: str
     kind: RunKind
-    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
 
 
 class StageEvent(BaseModel):
@@ -50,7 +50,7 @@ class StageEvent(BaseModel):
     request_id: str
     stage: str
     state: StageEventState
-    timestamp: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
+    timestamp: datetime = Field(default_factory=lambda: datetime.now(UTC))
     message: str | None = None
     metrics: dict[str, Any] | None = None
 
diff --git a/src/sage/studio/runtime/endpoints/contracts.py b/src/sage/studio/runtime/endpoints/contracts.py
index b386459..6cec62a 100644
--- a/src/sage/studio/runtime/endpoints/contracts.py
+++ b/src/sage/studio/runtime/endpoints/contracts.py
@@ -1,11 +1,11 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
-from enum import Enum
+from datetime import UTC, datetime
+from enum import StrEnum
 
 
-class EndpointProvider(str, Enum):
+class EndpointProvider(StrEnum):
     ALIBABA_DASHSCOPE = "alibaba_dashscope"
     OPENAI = "openai"
     ANTHROPIC = "anthropic"
@@ -39,8 +39,8 @@ class ManagedEndpoint:
     is_default: bool = False
     extra_headers: tuple[tuple[str, str], ...] = ()
     api_key: str | None = None
-    created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
-    updated_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
+    created_at: datetime = field(default_factory=lambda: datetime.now(UTC))
+    updated_at: datetime = field(default_factory=lambda: datetime.now(UTC))
 
 
 @dataclass(slots=True, frozen=True)
diff --git a/src/sage/studio/runtime/endpoints/registry.py b/src/sage/studio/runtime/endpoints/registry.py
index d223d85..88c7bb9 100644
--- a/src/sage/studio/runtime/endpoints/registry.py
+++ b/src/sage/studio/runtime/endpoints/registry.py
@@ -2,7 +2,7 @@
 
 import threading
 from dataclasses import replace
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 from sage.studio.runtime.endpoints.contracts import (
     PROVIDER_PRESETS,
@@ -59,7 +59,7 @@ def update_endpoint(self, endpoint_id: str, command: EndpointUpdate) -> ManagedE
             if current is None:
                 raise KeyError(endpoint_id)
 
-            now = datetime.now(timezone.utc)
+            now = datetime.now(UTC)
             updated = replace(
                 current,
                 display_name=command.display_name
@@ -92,7 +92,7 @@ def set_enabled(self, endpoint_id: str, enabled: bool) -> ManagedEndpoint:
             current = self._records.get(endpoint_id)
             if current is None:
                 raise KeyError(endpoint_id)
-            updated = replace(current, enabled=enabled, updated_at=datetime.now(timezone.utc))
+            updated = replace(current, enabled=enabled, updated_at=datetime.now(UTC))
             self._records[endpoint_id] = updated
             return updated
 
@@ -140,7 +140,7 @@ def reset(self) -> None:
             self._records.clear()
 
     def _set_default_locked(self, endpoint_id: str) -> None:
-        now = datetime.now(timezone.utc)
+        now = datetime.now(UTC)
         for record_id, record in list(self._records.items()):
             self._records[record_id] = replace(
                 record,
diff --git a/src/sage/studio/services/auth_service.py b/src/sage/studio/services/auth_service.py
index 5d79ac0..851dc9c 100644
--- a/src/sage/studio/services/auth_service.py
+++ b/src/sage/studio/services/auth_service.py
@@ -1,6 +1,6 @@
 import os
 import sqlite3
-from datetime import datetime, timedelta, timezone
+from datetime import UTC, datetime, timedelta
 
 from jose import JWTError, jwt
 from passlib.context import CryptContext
@@ -82,7 +82,7 @@ def create_user(self, username: str, password: str) -> User:
                 cursor = conn.cursor()
                 cursor.execute(
                     "INSERT INTO users (username, hashed_password, created_at, is_guest) VALUES (?, ?, ?, 0)",
-                    (username, hashed_password, datetime.now(timezone.utc)),
+                    (username, hashed_password, datetime.now(UTC)),
                 )
                 user_id = cursor.lastrowid
                 conn.commit()
@@ -107,7 +107,7 @@ def create_guest_user(self) -> User:
             cursor = conn.cursor()
             cursor.execute(
                 "INSERT INTO users (username, hashed_password, created_at, is_guest) VALUES (?, ?, ?, 1)",
-                (username, hashed_password, datetime.now(timezone.utc)),
+                (username, hashed_password, datetime.now(UTC)),
             )
             user_id = cursor.lastrowid
             conn.commit()
@@ -145,9 +145,9 @@ def get_user(self, username: str) -> UserInDB | None:
     def create_access_token(self, data: dict, expires_delta: timedelta | None = None) -> str:
         to_encode = data.copy()
         if expires_delta:
-            expire = datetime.now(timezone.utc) + expires_delta
+            expire = datetime.now(UTC) + expires_delta
         else:
-            expire = datetime.now(timezone.utc) + timedelta(minutes=15)
+            expire = datetime.now(UTC) + timedelta(minutes=15)
         to_encode.update({"exp": expire})
         encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
         return encoded_jwt
diff --git a/tests/integration/test_studio_cli.py b/tests/integration/test_studio_cli.py
index 4f655a0..675bdfc 100644
--- a/tests/integration/test_studio_cli.py
+++ b/tests/integration/test_studio_cli.py
@@ -5,14 +5,18 @@
 from unittest.mock import patch
 
 import pytest
-
-# Import from sage-cli (which hosts the studio command)
-from sage.cli.main import app as sage_app
+import typer
 from typer.testing import CliRunner
 
+from sage.studio.cli import register_studio_command
+
 # Test runner
 runner = CliRunner()
 
+# Build a minimal root CLI app for testing plugin registration.
+sage_app = typer.Typer()
+register_studio_command(sage_app)
+
 
 class FakeStudioManager:
     """Mock StudioManager for testing."""