1 files changed, 14 insertions, 3 deletions
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index 2ecb15deee..29e62bfcdd 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -13,11 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from synapse.http.servlet import RestServlet
-
 import logging
 import re
 
+from synapse.http.servlet import RestServlet
+
 logger = logging.getLogger(__name__)
 
 
@@ -27,11 +27,22 @@ class VersionsRestServlet(RestServlet):
     def on_GET(self, request):
         return (200, {
             "versions": [
+                # XXX: at some point we need to decide whether we need to include
+                # the previous version numbers, given we've defined r0.3.0 to be
+                # backwards compatible with r0.2.0.  But need to check how
+                # conscientious we've been in compatibility, and decide whether the
+                # middle number is the major revision when at 0.X.Y (as opposed to
+                # X.Y.Z).  And we need to decide whether it's fair to make clients
+                # parse the version string to figure out what's going on.
                 "r0.0.1",
                 "r0.1.0",
                 "r0.2.0",
                 "r0.3.0",
-            ]
+            ],
+            # as per MSC1497:
+            "unstable_features": {
+                "m.lazy_load_members": True,
+            }
         })