feat(mcp): scaffold three project context tools

docs/project-context-mcp-team-guide.md

@@ -21,12 +21,13 @@ cần đổi, mở một PR nhỏ riêng và để cả ba người rebase sau k
 
 ## Bắt đầu trong 5 phút
 
-1. Tạo branch từ commit template chứa tài liệu này sau khi PR template merge.
-2. Đọc input/output model trong module tool được giao; không thêm field riêng của Gitea/Jira/Redmine.
-3. Implement provider read-only trong module `providers/<tool>.py`; credential chỉ lấy sau policy ALLOW.
-4. Thêm test happy, invalid, not-found, timeout, DENIED với `resolver.calls == 0`, output sai schema,
+1. Chạy `python --version` và xác nhận Python 3.11+ như baseline trong `requirements.txt`.
+2. Tạo branch từ commit template chứa tài liệu này sau khi PR template merge.
+3. Đọc input/output model trong module tool được giao; không thêm field riêng của Gitea/Jira/Redmine.
+4. Implement provider read-only trong module `providers/<tool>.py`; credential chỉ lấy sau policy ALLOW.
+5. Thêm test happy, invalid, not-found, timeout, DENIED với `resolver.calls == 0`, output sai schema,
    truncation/cursor và source mở được có `revision`.
-5. Chạy:
+6. Chạy:
 
    ```bash
    python -m pytest tests/test_project_context_mcp_template.py tests/test_project_context_<tool>.py -q

mcp_servers/project_context/runtime.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import os
+import sys
 from collections.abc import Callable
 from dataclasses import dataclass
 from typing import Any
@@ -12,6 +13,18 @@ from .providers.change import build_provider as build_change_provider
 from .providers.issue import build_provider as build_issue_provider
 from .providers.knowledge import build_provider as build_knowledge_provider
 
+MINIMUM_PYTHON = (3, 11)
+
+
+def require_supported_python(version_info: tuple[int, ...] | None = None) -> None:
+    """Fail with an actionable message before the MCP server starts."""
+    current = version_info or tuple(sys.version_info[:3])
+    if current[:2] < MINIMUM_PYTHON:
+        raise RuntimeError(
+            "Project Context MCP requires Python 3.11 or newer; "
+            f"current runtime is {current[0]}.{current[1]}"
+        )
+
 
 @dataclass(frozen=True)
 class ProjectScopePolicy:
@@ -46,6 +59,7 @@ def _required_environment(name: str) -> str:
 
 def default_runtime() -> ProjectContextRuntime:
     """Build immutable runtime state; missing identity configuration fails at boot."""
+    require_supported_python()
     identity = IdentityContext(
         actor_id=_required_environment("COWORK_MCP_ACTOR_ID"),
         org_unit=_required_environment("COWORK_MCP_ORG_UNIT"),

mcp_servers/project_context/server.py

@@ -17,7 +17,7 @@ from .foundation import (
     error_result,
 )
 from .registry import TOOLS_BY_NAME, tool_declarations
-from .runtime import default_runtime
+from .runtime import default_runtime, require_supported_python
 
 
 def dispatch(
@@ -102,6 +102,7 @@ def build_server(runtime: Optional[ProjectContextRuntime] = None):
     from mcp import types
     from mcp.server.lowlevel import Server
 
+    require_supported_python()
     app_runtime = runtime or default_runtime()
     app = Server("project_context")
 

tests/test_project_context_mcp_template.py

@@ -12,6 +12,7 @@ from cowork_local.mcp_servers.project_context.registry import (
     TOOL_NAMES,
     tool_declarations,
 )
+from cowork_local.mcp_servers.project_context.runtime import require_supported_python
 from cowork_local.mcp_servers.project_context.server import dispatch
 from mcp import types
 
@@ -95,6 +96,11 @@ def test_template_exposes_exactly_three_provider_neutral_tools() -> None:
     assert all(types.Tool(**item).name in EXPECTED_TOOLS for item in declarations)
 
 
+def test_runtime_fails_fast_below_python_311() -> None:
+    with pytest.raises(RuntimeError, match="requires Python 3.11"):
+        require_supported_python((3, 9, 0))
+
+
 def test_denied_request_never_resolves_credentials_or_calls_provider(
     identity: IdentityContext,
 ) -> None: