diff --git a/libraries/core/src/coordinator_messages.rs b/libraries/core/src/coordinator_messages.rs
new file mode 100644
index 00000000..5c85e754
--- /dev/null
+++ b/libraries/core/src/coordinator_messages.rs
@@ -0,0 +1,21 @@
+use eyre::eyre;
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum CoordinatorRequest {
+    Register { machine_id: String },
+}
+
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub enum RegisterResult {
+    Ok,
+    Err(String),
+}
+
+impl RegisterResult {
+    pub fn to_result(self) -> eyre::Result<()> {
+        match self {
+            RegisterResult::Ok => Ok(()),
+            RegisterResult::Err(err) => Err(eyre!(err)),
+        }
+    }
+}
diff --git a/libraries/core/src/daemon_messages.rs b/libraries/core/src/daemon_messages.rs
index 375a53df..df3a849a 100644
--- a/libraries/core/src/daemon_messages.rs
+++ b/libraries/core/src/daemon_messages.rs
@@ -1,8 +1,14 @@
+use crate::config::{DataId, NodeId, NodeRunConfig};
 use dora_message::Metadata;
 use eyre::Context;
 use shared_memory::{Shmem, ShmemConf};
 
-use crate::config::{DataId, NodeId};
+#[derive(Debug, serde::Serialize, serde::Deserialize)]
+pub struct NodeConfig {
+    pub node_id: NodeId,
+    pub run_config: NodeRunConfig,
+    pub daemon_port: u16,
+}
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
 pub enum ControlRequest {
diff --git a/libraries/core/src/lib.rs b/libraries/core/src/lib.rs
index b4b20cc0..a96517dc 100644
--- a/libraries/core/src/lib.rs
+++ b/libraries/core/src/lib.rs
@@ -5,6 +5,7 @@ use std::{
 };
 
 pub mod config;
+pub mod coordinator_messages;
 pub mod daemon_messages;
 pub mod descriptor;
 pub mod topics;
diff --git a/libraries/core/src/topics.rs b/libraries/core/src/topics.rs
index ca05fb41..23463264 100644
--- a/libraries/core/src/topics.rs
+++ b/libraries/core/src/topics.rs
@@ -5,7 +5,7 @@ use std::{
 };
 use uuid::Uuid;
 
-pub const DORA_DAEMON_PORT_DEFAULT: u16 = 0xD02A;
+pub const DORA_COORDINATOR_PORT_DEFAULT: u16 = 0xD02A;
 
 pub const MANUAL_STOP: &str = "dora/stop";