diff --git a/mw/mr/mwmr-core b/mw/mr/mwmr-core
new file mode 100644
index 00000000000..ba5cb38551d
--- /dev/null
+++ b/mw/mr/mwmr-core
@@ -0,0 +1 @@
+{"name":"mwmr-core","vers":"0.1.0","deps":[{"name":"cheap-clone","req":"^0.1","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"either","req":"^1","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal"},{"name":"indexmap","req":"^2","features":[],"optional":false,"default_features":false,"target":null,"kind":"normal"},{"name":"smallvec-wrapper","req":"^0.1","features":["const_new"],"optional":false,"default_features":true,"target":null,"kind":"normal"}],"cksum":"1ee8af76fbbb63f786ccff611dea66ced8b83f109f241327f1a7e6af2d086041","features":{},"yanked":false}