diff --git a/connection.capnp b/connection.capnp
index f685dfe..8ec8fdf 100644
--- a/connection.capnp
+++ b/connection.capnp
@@ -24,28 +24,34 @@
 
 using Auth = import "auth.capnp";
 using Api = import "api.capnp";
-using Rpc = import "rpc.capnp";
 
 struct Message {
     union {
-        open @0 :Open;
-        # Initialize a connection to the other end
+        greet @0 :Greeting;
+        # Be polite and say hello to the other end
 
-        close @1 :Void;
-        # The stream can be closed by either end at any time by sending this
-        # tag.
-
-        auth @2 :Auth.AuthMessage;
+        auth @1 :Auth.AuthMessage;
         # Start an authenticaion exchange
 
-        # TODO: RPC & Crypto
+        starttls @2 :Void;
+        # Start a tls handshake
+
+        # TODO: RPC bootstrapping
     }
 }
 
-struct Open {
+struct Greeting {
     # Be nice and say hello to each other first
-    # A client sends this message to a server first thing
+    # A client sends this message to a server first thing, a server then replies
+    # similarly
 
-    major @0 :UInt32; # The major part of the API version
-    minor @1 :UInt32; # The minor part of the API version
+    # Hello, I'm …
+    host @0 :Text; # non-qualified Hostname of the client/server, as applicable
+
+    # using the program …
+    program @1 :Text; # SHOULD be of the form `programname-version`
+
+    # and speak the API version …
+    major @2 :UInt32; # The major part of the API version
+    minor @3 :UInt32; # The minor part of the API version
 }