Function group_messages_for_export 

pub fn group_messages_for_export(messages: Vec<Message>) -> Vec<MessageGroup>

Groups flat messages into MessageGroups with tool correlation.

Algorithm

1. Detect agent format from message structure
2. Classify each message
3. User/Assistant content messages start new groups
4. Tool-only messages attach to current assistant group
5. Tool results correlate by ID to matching tool call
6. System messages are standalone groups
7. Track timestamps for group range

Logging

• INFO: Group formation summary
• DEBUG: Each message classification
• TRACE: Correlation matching details

Example

let messages: Vec<Message> = load_messages();
let groups = group_messages_for_export(messages);
for group in groups {
    render_message_group(&group);
}