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server/app.py

@@ -57,6 +57,18 @@ app = create_app(
     max_concurrent_envs=3,
 )
 
+# ─── Root endpoint (required: hackathon validator pings / and expects 200) ────
+
+@app.get("/")
+async def root():
+    """Root endpoint — returns environment info and available endpoints."""
+    return {
+        "name": "api_debug_env",
+        "description": "API Integration Debugging Environment",
+        "status": "running",
+        "endpoints": ["/reset", "/step", "/state", "/tasks", "/grader", "/baseline", "/health", "/schema", "/docs"],
+    }
+
 
 # ─── Hackathon-required endpoints ─────────────────────────────────────────────