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@@ -70,6 +70,7 @@ ENV PATH="/app/.venv/bin:$PATH"
 
 # Set PYTHONPATH so imports work correctly
 ENV PYTHONPATH="/app/env:$PYTHONPATH"
+ENV ENABLE_WEB_INTERFACE="true"
 
 # Health check
 # Use Python stdlib instead of curl so the probe works even if curl is absent.
@@ -78,5 +79,4 @@ HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=5 \
 
 # Run the FastAPI server
 # Respect PORT if the platform injects one; default to 8000.
-ENV ENABLE_WEB_INTERFACE=true
 CMD ["sh", "-c", "cd /app/env && uvicorn server.app:app --host 0.0.0.0 --port ${PORT:-8000}"]

server/app.py

@@ -38,6 +38,12 @@ except Exception as e:  # pragma: no cover
 # Import from local models.py (PYTHONPATH includes /app/env in Docker)
 from models import BasicOpenenvAction, BasicOpenenvObservation
 from .basic_openenv_environment import BasicOpenenvEnvironment
+from fastapi.responses import RedirectResponse
+import os
+
+
+# Required for OpenEnv to mount the HF-style web UI at /web.
+os.environ.setdefault("ENABLE_WEB_INTERFACE", "true")
 
 
 # Create the app with web interface and README integration
@@ -50,6 +56,12 @@ app = create_app(
 )
 
 
+@app.get("/", include_in_schema=False)
+def root_redirect():
+    """Match HF Space UX: open app at /web UI."""
+    return RedirectResponse(url="/web")
+
+
 def main():
     """
     Entry point for direct execution via uv run or python -m.