commit 3ad838fd2ce2d37da8532297898c8150948788cd
Author: Agent <agent@example.com>
Date:   Sun May 17 07:28:41 2026 +0000

    Initial commit: FastAPI Hello World API

diff --git a/main.py b/main.py
new file mode 100644
index 0000000..fc71224
--- /dev/null
+++ b/main.py
@@ -0,0 +1,8 @@
+from fastapi import FastAPI, Request
+
+app = FastAPI()
+
+@app.get("/")
+async def read_root(request: Request):
+    client_host = request.client.host
+    return {"message": "ハローワールド！！", "client_ip": client_host}
\ No newline at end of file