chore: import upstream snapshot with attribution

examples/stories/stateless_legacy/server_lowlevel.py

@@ -0,0 +1,38 @@
+"""The one-liner HTTP deploy (lowlevel API): Server.streamable_http_app(stateless_http=True)."""
+
+from typing import Any
+
+import mcp_types as types
+from starlette.applications import Starlette
+
+from mcp.server.context import ServerRequestContext
+from mcp.server.lowlevel import Server
+from stories._hosting import NO_DNS_REBIND, run_app_from_args
+
+GREET_INPUT_SCHEMA: dict[str, Any] = {
+    "type": "object",
+    "properties": {"name": {"type": "string"}},
+    "required": ["name"],
+}
+
+
+def build_app() -> Starlette:
+    async def list_tools(
+        ctx: ServerRequestContext[Any], params: types.PaginatedRequestParams | None
+    ) -> types.ListToolsResult:
+        return types.ListToolsResult(
+            tools=[
+                types.Tool(name="greet", description="A simple greeting tool.", input_schema=GREET_INPUT_SCHEMA),
+            ]
+        )
+
+    async def call_tool(ctx: ServerRequestContext[Any], params: types.CallToolRequestParams) -> types.CallToolResult:
+        assert params.name == "greet" and params.arguments is not None
+        return types.CallToolResult(content=[types.TextContent(text=f"Hello, {params.arguments['name']}!")])
+
+    server = Server("stateless-legacy-example", on_list_tools=list_tools, on_call_tool=call_tool)
+    return server.streamable_http_app(stateless_http=True, transport_security=NO_DNS_REBIND)
+
+
+if __name__ == "__main__":
+    run_app_from_args(build_app)