diff --git a/src/development/design/actor.md b/src/development/design/actor.md
index ac9a063..eda0f6a 100644
--- a/src/development/design/actor.md
+++ b/src/development/design/actor.md
@@ -10,6 +10,7 @@ It reduces work of implementation, and all implementations can use the functions
 - **OCAP** security
 - **HMAC** message verification
 
+## Format
 ```rust
 // Different possible types of actors (more to be added)
 enum ActorType {
@@ -81,8 +82,31 @@ trait DataInterface { // Necessary data functions
 **TODO**
 
 ## Messages
-**TODO**
 - [postcard](https://lib.rs/crates/postcard) for message passing
 - Priority Queue for processing multiple messages, while dealing with higher-priority ones first
 
+```rust
+enum ProcessCode {
+    Exit, // Exit the process
+    Save, // Save data
+    Clear, // Clear data
+    Restart, // Restart process
+}
+
+enum MessageType {
+    Ping(String), // Simple test if we can send/recieve a message
+    FilesystemUpdate(gravitas::FileOperation), // We want to operate on the filesystem
+    GraphicsUpdate(photon::GraphicsOperation), // Update a graphics window
+    TextUpdate(String), // Send some text (text mode only)
+    ProcessUpdate(ProcessCode), // Send some info about an operation to be done on the current process. Usually kernel -> exe
+}
+
+struct Message {
+    m_type: MessageType, // Message type & content
+    priority: u8, // For priority queueing
+    sender: Uuid, // Who is sending the message
+    recipient: Uuid, // Who the message is meant for
+}
+```
+
 ### Latency