[train] Document ray.train.collective (#54340)

TimothySeah · web-flow · commit 694b9f96fca4 · 2025-07-07T19:38:45.000Z
Signed-off-by: Timothy Seah &lt;tseah@anyscale.com&gt;
Co-authored-by: Timothy Seah &lt;tseah@anyscale.com&gt;
diff --git a/doc/source/train/api/api.rst b/doc/source/train/api/api.rst
@@ -147,6 +147,14 @@ Ray Train Utilities
     ~train.get_dataset_shard
     ~train.report
 
+**Collective**
+
+.. autosummary::
+    :nosignatures:
+    :toctree: doc/
+
+    ~train.collective.barrier
+    ~train.collective.broadcast_from_rank_zero
 
 Ray Train Output
 ----------------
