diff --git a/dev/restate/core.proto b/dev/restate/core.proto
deleted file mode 100644
index 7c2fe8f..0000000
--- a/dev/restate/core.proto
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
-  This package provides core user facing Restate types
- */
-syntax = "proto3";
-
-package dev.restate.core;
-
-option java_multiple_files = true;
-option java_package = "dev.restate.generated.core";
-option go_package = "restate.dev/sdk-go/pb/core";
-
-message AwakeableIdentifier {
-  string service_name = 1;
-  bytes instance_key = 2;
-  bytes invocation_id = 3;
-  uint32 entry_index = 4;
-}
\ No newline at end of file
diff --git a/dev/restate/services.proto b/dev/restate/services.proto
index ee2652d..174b164 100644
--- a/dev/restate/services.proto
+++ b/dev/restate/services.proto
@@ -5,6 +5,9 @@ syntax = "proto3";
 
 package dev.restate;
 
+import "google/protobuf/empty.proto";
+import "google/protobuf/struct.proto";
+
 option java_multiple_files = true;
 option java_package = "dev.restate.generated";
 option go_package = "restate.dev/sdk-go/pb";
@@ -32,4 +35,32 @@ message InvokeResponse {
   // Generated unique invocation identifier.
   // It can be used to retrieve the status of the invocation and cancel it.
   string sid = 1;
+}
+
+service Awakeables {
+  // Resolve an Awakeable with a result value.
+  rpc Resolve(ResolveAwakeableRequest) returns (google.protobuf.Empty);
+  // Reject an Awakeable with a reason.
+  rpc Reject(RejectAwakeableRequest) returns (google.protobuf.Empty);
+}
+
+message ResolveAwakeableRequest {
+  // Base64 encoded identifier of the Awakeable to resolve.
+  string id = 1;
+
+  oneof result {
+    bytes bytes_result = 2;
+
+    // When executing requests to the ingress using JSON, you can pass a json_result directly for ease of use.
+    // json_result will be sent back to the awakeable as string encoded JSON, not as Protobuf value.
+    google.protobuf.Value json_result = 3;
+  }
+}
+
+message RejectAwakeableRequest {
+  // Base64 encoded identifier of the Awakeable to reject.
+  string id = 1;
+
+  // Rejection reason.
+  string reason = 2;
 }
\ No newline at end of file