chore: better default repo_type for Space uploads

app.py

@@ -115,8 +115,18 @@ def upload_recordings(paths: Sequence[str]) -> Tuple[int, Optional[str]]:
     api = HfApi(token=token)
     uploaded = 0
     commit_msg = f"Add recordings {int(time.time())}"
-    # repo_type: "dataset" (recommended) or "space" to commit to the Space repo
-    repo_type = os.getenv("HF_UPLOAD_REPO_TYPE", "dataset").lower()
+    # Determine repo_type. If user provided HF_UPLOAD_REPO, default to dataset.
+    # If we inferred the current Space id, default to space so it "just works".
+    repo_type_env = os.getenv("HF_UPLOAD_REPO_TYPE")
+    if repo_type_env:
+        repo_type = repo_type_env.lower()
+    else:
+        if os.getenv("HF_UPLOAD_REPO"):
+            repo_type = "dataset"
+        elif os.getenv("SPACE_ID") or os.getenv("REPO_ID"):
+            repo_type = "space"
+        else:
+            repo_type = "dataset"
     if repo_type not in {"dataset", "space", "model"}:
         repo_type = "dataset"
     try: