fix(todo): add missing read_todos/write_todos methods to TodoTool

The TodoTool was calling self.read_todos() and self.write_todos() but
these methods were not defined in either TodoTool or TodoBaseTool.
Added the methods using TodoStorage with a default session ID.

pkg/hanzo-mcp/hanzo_mcp/tools/todo/todo.py

@@ -4,6 +4,7 @@ import uuid
 from typing import (
     Any,
     Dict,
+    List,
     Unpack,
     Optional,
     Annotated,
@@ -16,9 +17,12 @@ from datetime import datetime
 from pydantic import Field
 from mcp.server.fastmcp import Context as MCPContext
 
-from hanzo_mcp.tools.todo.base import TodoBaseTool
+from hanzo_mcp.tools.todo.base import TodoBaseTool, TodoStorage
 from hanzo_mcp.tools.common.auto_timeout import auto_timeout
 
+# Default session ID for the unified todo tool
+DEFAULT_SESSION_ID = "default-session"
+
 # Parameter types
 Action = Annotated[
     str,
@@ -84,6 +88,14 @@ class TodoParams(TypedDict, total=False):
 class TodoTool(TodoBaseTool):
     """Unified todo management tool."""
 
+    def read_todos(self) -> list[Dict[str, Any]]:
+        """Read todos from storage using default session."""
+        return TodoStorage.get_todos(DEFAULT_SESSION_ID)
+
+    def write_todos(self, todos: list[Dict[str, Any]]) -> None:
+        """Write todos to storage using default session."""
+        TodoStorage.set_todos(DEFAULT_SESSION_ID, todos)
+
     @property
     @override
     def name(self) -> str:

pkg/hanzo-mcp/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "hanzo-mcp"
-version = "0.9.17"
+version = "0.9.18"
 description = "The Zen of Hanzo MCP: One server to rule them all. The ultimate MCP that orchestrates all others."
 readme = "README.md"
 requires-python = ">=3.12"

pkg/hanzo-mcp/uv.lock

@@ -1003,7 +1003,7 @@ wheels = [
 
 [[package]]
 name = "hanzo-mcp"
-version = "0.9.15"
+version = "0.9.16"
 source = { editable = "." }
 dependencies = [
     { name = "aiofiles" },