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README.md

@@ -6,7 +6,6 @@ colorTo: blue
 sdk: docker
 pinned: true
 app_port: 8000
-base_path: /web
 tags:
   - openenv
   - reinforcement-learning

server/app.py

@@ -56,28 +56,21 @@ app = create_app(
     max_concurrent_envs=4,
 )
 
-# Mount Gradio demo at /web.
-# SSR mode is disabled because Gradio's Node sidecar tends to 502 under HF
-# Spaces' Docker proxy; client-side rendering is more reliable. root_path is
-# set so relative asset URLs resolve correctly when HF iframes /web.
+# Mount the Gradio demo at the root path.
+#
+# Mounting at "/" lets HF Spaces iframe the app directly without needing
+# base_path in the README, and avoids the Gradio 5.x SSR sidecar that 502s
+# under HF's Docker reverse proxy. FastAPI routes registered by create_app
+# (/reset, /step, /schema, /openapi.json, /health, /ws) keep priority
+# because they're exact-match and were registered BEFORE this mount.
 try:
     import gradio as gr
     _demo = _build_demo_ui()
     app = gr.mount_gradio_app(
         app, _demo,
-        path="/web",
-        root_path="/web",
+        path="/",
         ssr_mode=False,
     )
-
-    # Redirect root and /web (no trailing slash) to /web/ so the HF Space
-    # iframe works whether base_path is set or not.
-    from fastapi.responses import RedirectResponse
-
-    @app.get("/")
-    def _root_redirect():
-        return RedirectResponse(url="/web/")
-
 except Exception as _e:  # pragma: no cover
     import logging
     logging.getLogger(__name__).warning(