Add dev message upon review out (#3758)

Proposal: We want to record a dev message like so:

```
{
      "type": "message",
      "role": "user",
      "content": [
        {
          "type": "input_text",
          "text": "<user_action>
  <context>User initiated a review task. Here's the full review output from reviewer model. User may select one or more comments to resolve.</context>
  <action>review</action>
  <results>
  {findings_str}
  </results>
</user_action>"
        }
      ]
    },
```

Without showing in the chat transcript.

Rough idea, but it fixes issue where the user finishes a review thread,
and asks the parent "fix the rest of the review issues" thinking that
the parent knows about it.

### Question: Why not a tool call?

Because the agent didn't make the call, it was a human. + we haven't
implemented sub-agents yet, and we'll need to think about the way we
represent these human-led tool calls for the agent.

codex-rs/core/tests/suite/review.rs

@@ -1,10 +1,13 @@
 use codex_core::CodexAuth;
 use codex_core::CodexConversation;
+use codex_core::ContentItem;
 use codex_core::ConversationManager;
 use codex_core::ModelProviderInfo;
 use codex_core::REVIEW_PROMPT;
+use codex_core::ResponseItem;
 use codex_core::built_in_model_providers;
 use codex_core::config::Config;
+use codex_core::protocol::ConversationPathResponseEvent;
 use codex_core::protocol::ENVIRONMENT_CONTEXT_OPEN_TAG;
 use codex_core::protocol::EventMsg;
 use codex_core::protocol::ExitedReviewModeEvent;
@@ -15,6 +18,8 @@ use codex_core::protocol::ReviewFinding;
 use codex_core::protocol::ReviewLineRange;
 use codex_core::protocol::ReviewOutputEvent;
 use codex_core::protocol::ReviewRequest;
+use codex_core::protocol::RolloutItem;
+use codex_core::protocol::RolloutLine;
 use codex_core::spawn::CODEX_SANDBOX_NETWORK_DISABLED_ENV_VAR;
 use core_test_support::load_default_config_for_test;
 use core_test_support::load_sse_fixture_with_id_from_str;
@@ -117,6 +122,46 @@ async fn review_op_emits_lifecycle_and_review_output() {
     assert_eq!(expected, review);
     let _complete = wait_for_event(&codex, |ev| matches!(ev, EventMsg::TaskComplete(_))).await;
 
+    // Also verify that a user message with the header and a formatted finding
+    // was recorded back in the parent session's rollout.
+    codex.submit(Op::GetPath).await.unwrap();
+    let history_event =
+        wait_for_event(&codex, |ev| matches!(ev, EventMsg::ConversationPath(_))).await;
+    let path = match history_event {
+        EventMsg::ConversationPath(ConversationPathResponseEvent { path, .. }) => path,
+        other => panic!("expected ConversationPath event, got {other:?}"),
+    };
+    let text = std::fs::read_to_string(&path).expect("read rollout file");
+
+    let mut saw_header = false;
+    let mut saw_finding_line = false;
+    for line in text.lines() {
+        if line.trim().is_empty() {
+            continue;
+        }
+        let v: serde_json::Value = serde_json::from_str(line).expect("jsonl line");
+        let rl: RolloutLine = serde_json::from_value(v).expect("rollout line");
+        if let RolloutItem::ResponseItem(ResponseItem::Message { role, content, .. }) = rl.item
+            && role == "user"
+        {
+            for c in content {
+                if let ContentItem::InputText { text } = c {
+                    if text.contains("full review output from reviewer model") {
+                        saw_header = true;
+                    }
+                    if text.contains("- Prefer Stylize helpers — /tmp/file.rs:10-20") {
+                        saw_finding_line = true;
+                    }
+                }
+            }
+        }
+    }
+    assert!(saw_header, "user header missing from rollout");
+    assert!(
+        saw_finding_line,
+        "formatted finding line missing from rollout"
+    );
+
     server.verify().await;
 }
 
@@ -452,6 +497,43 @@ async fn review_input_isolated_from_parent_history() {
         format!("{REVIEW_PROMPT}\n\n---\n\nNow, here's your task: Please review only this",)
     );
 
+    // Also verify that a user interruption note was recorded in the rollout.
+    codex.submit(Op::GetPath).await.unwrap();
+    let history_event =
+        wait_for_event(&codex, |ev| matches!(ev, EventMsg::ConversationPath(_))).await;
+    let path = match history_event {
+        EventMsg::ConversationPath(ConversationPathResponseEvent { path, .. }) => path,
+        other => panic!("expected ConversationPath event, got {other:?}"),
+    };
+    let text = std::fs::read_to_string(&path).expect("read rollout file");
+    let mut saw_interruption_message = false;
+    for line in text.lines() {
+        if line.trim().is_empty() {
+            continue;
+        }
+        let v: serde_json::Value = serde_json::from_str(line).expect("jsonl line");
+        let rl: RolloutLine = serde_json::from_value(v).expect("rollout line");
+        if let RolloutItem::ResponseItem(ResponseItem::Message { role, content, .. }) = rl.item
+            && role == "user"
+        {
+            for c in content {
+                if let ContentItem::InputText { text } = c
+                    && text.contains("User initiated a review task, but was interrupted.")
+                {
+                    saw_interruption_message = true;
+                    break;
+                }
+            }
+        }
+        if saw_interruption_message {
+            break;
+        }
+    }
+    assert!(
+        saw_interruption_message,
+        "expected user interruption message in rollout"
+    );
+
     server.verify().await;
 }