Session manager (#4648)

Co-authored-by: Douwe Osinga <douwe@squareup.com>

crates/goose/src/conversation/mod.rs

@@ -3,11 +3,12 @@ use rmcp::model::Role;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 use thiserror::Error;
+use utoipa::ToSchema;
 
 pub mod message;
 mod tool_result_serde;
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema, PartialEq)]
 pub struct Conversation(Vec<Message>);
 
 #[derive(Error, Debug)]
@@ -122,6 +123,23 @@ impl Default for Conversation {
     }
 }
 
+impl IntoIterator for Conversation {
+    type Item = Message;
+    type IntoIter = std::vec::IntoIter<Message>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
+impl<'a> IntoIterator for &'a Conversation {
+    type Item = &'a Message;
+    type IntoIter = std::slice::Iter<'a, Message>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.iter()
+    }
+}
+
 /// Fix a conversation that we're about to send to an LLM. So the last and first
 /// messages should always be from the user.
 pub fn fix_conversation(conversation: Conversation) -> (Conversation, Vec<String>) {