feat(hanzo-mcp): add version MCP tool

- Add version() tool to get hanzo-mcp version via MCP
- Sync __version__ with pyproject.toml (0.9.23)
- Returns hanzo_mcp version, python version, platform, arch

pkg/hanzo-mcp/hanzo_mcp/__init__.py

@@ -26,4 +26,4 @@ if os.environ.get("HANZO_MCP_TRANSPORT") == "stdio":
     except ImportError:
         pass
 
-__version__ = "0.8.16"
+__version__ = "0.9.23"

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

@@ -374,6 +374,10 @@ def register_all_tools(
         all_tools[tool.name] = tool
 
     # Register system tools (always enabled)
+    # Version tool
+    from hanzo_mcp.tools.common.version_tool import register_version_tool
+    register_version_tool(mcp_server)
+
     # Tool enable/disable tools
     tool_enable = ToolEnableTool()
     tool_enable.register(mcp_server)

pkg/hanzo-mcp/hanzo_mcp/tools/common/version_tool.py

@@ -0,0 +1,30 @@
+"""Version tool for hanzo-mcp."""
+
+import sys
+from typing import Any
+
+from mcp.server.fastmcp import FastMCP
+
+import hanzo_mcp
+
+
+def register_version_tool(mcp: FastMCP) -> None:
+    """Register the version tool with the MCP server."""
+
+    @mcp.tool()
+    async def version() -> dict[str, Any]:
+        """Get hanzo-mcp version and environment information.
+
+        Returns version info including:
+        - hanzo-mcp version
+        - Python version
+        - Platform info
+        """
+        import platform
+
+        return {
+            "hanzo_mcp": hanzo_mcp.__version__,
+            "python": sys.version.split()[0],
+            "platform": platform.system(),
+            "arch": platform.machine(),
+        }

pkg/hanzo-mcp/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "hanzo-mcp"
-version = "0.9.22"
+version = "0.9.23"
 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

@@ -1232,7 +1232,7 @@ wheels = [
 
 [[package]]
 name = "hanzo-mcp"
-version = "0.9.21"
+version = "0.9.23"
 source = { editable = "." }
 dependencies = [
     { name = "aiofiles" },