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+Subproject commit 626b62414ba011e59adbefc9976f8d0553703a28
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+## Conversation
+
+**Responsibilities**
+- Holds and receives messages sent by participants
+- Maintains relationships between messages, their replies, and attachments
+- Coordinates with read status tracking to determine which message each user last read.
+- Contains the conversation image and title
+
+**Collaborators**
+- User
+- Message
+- WebSocket
+
+
+## WebSocket
+
+**Responsibilities**
+- Updates users in real time when a message, letter, invite, etc. shows up.
+- Handles real-time chat events such as typing indicators and read status updates.
+
+**Collaborators**
+- User
+- Conversation
+- Notification (Inbox)
+
+
+## Message
+
+**Responsibilities**
+- Holds text info on the current message
+- Keeps track of who sent the message and the date when it was sent
+
+**Collaborators**
+- Conversation
+- User
+
+
+## Notification (Inbox)
+
+**Responsibilities**
+- Contains information about what's in the message
+- Tracks who sent it and when
+- Holds any associated package content or additional data
+
+**Collaborators**
+- User
+- Conversation
+- Friend
+
+
+## Friend
+
+**Responsibilities**
+- Represents a friendship relationship between users
+- Stores friendship status and metadata (for example, when the friendship was created)
+- Supports friend-related actions such as sending and responding to friend requests
+
+**Collaborators**
+- User
+- Notification (Inbox)
+- Conversation
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