Add root route for HF Space

server/app.py

@@ -41,6 +41,16 @@ def health():
     return {"status": "ok", "env": "idpi-exfil-env", "version": "0.1.0"}
 
 
+@app.get("/")
+def root():
+    return {
+        "name": "IDPI Exfil Environment",
+        "status": "ok",
+        "description": "OpenEnv-compatible prompt injection defense environment.",
+        "routes": ["/health", "/reset", "/step", "/state", "/result"],
+    }
+
+
 @app.post("/reset", response_model=Observation)
 def reset(request: ResetRequest):
     # Validates difficulty before passing to env