use super::*;use codex_extension_api::ExtensionData;use codex_extension_api::TurnItemContributor;use codex_protocol::items::AgentMessageContent;use pretty_assertions::assert_eq;use std::sync::Arc;struct RewriteAgentMessageContributor;impl TurnItemContributor for RewriteAgentMessageContributor {    fn contribute<'a>(        &'a self,        _thread_store: &'a ExtensionData,        _turn_store: &'a ExtensionData,        item: &'a mut TurnItem,    ) -> codex_extension_api::ExtensionFuture<'a, Result<(), String>> {        Box::pin(async move {            if let TurnItem::AgentMessage(agent_message) = item {                agent_message.content = vec![AgentMessageContent::Text {                    text: "plan contributed assistant text".to_string(),                }];            }            Ok(())        })    }}fn assistant_output_text(text: &str) -> ResponseItem {    ResponseItem::Message {        id: Some("msg-1".to_string()),        role: "assistant".to_string(),        content: vec![ContentItem::OutputText {            text: text.to_string(),        }],        phase: None,        metadata: None,    }}#[tokio::test]async fn plan_mode_uses_contributed_turn_item_for_last_agent_message() {    let (mut session, turn_context) = crate::session::tests::make_session_and_context().await;    let mut builder = codex_extension_api::ExtensionRegistryBuilder::new();    builder.turn_item_contributor(Arc::new(RewriteAgentMessageContributor));    session.services.extensions = Arc::new(builder.build());    let turn_store = ExtensionData::new(turn_context.sub_id.clone());    let mut state = PlanModeStreamState::new(&turn_context.sub_id);    let mut last_agent_message = None;    let item = assistant_output_text("original assistant text");    let handled = handle_assistant_item_done_in_plan_mode(        &session,        &turn_context,        &turn_store,        &item,        &mut state,        /*previously_active_item*/ None,        &mut last_agent_message,    )    .await;    assert!(handled);    assert_eq!(        last_agent_message.as_deref(),        Some("plan contributed assistant text")    );}