Add Daybreak state to the status line and terminal title (#49861)

## What changed

Add a selectable `daybreak` item to the status line and terminal title, including setup previews and terminal-title validation. Display `Daybreak on` when enabled for the thread and `Daybreak off` otherwise, including during side conversations.

## Testing

Add coverage for on/off rendering and side conversations, update setup preview snapshots, and verify that terminal-title diagnostics accept `daybreak`.

GitOrigin-RevId: b0b7a6f0ee0a107ba4ee2d56113a5b9b6ebd1d41

codex-rs/cli/src/doctor/title.rs

@@ -142,6 +142,7 @@ fn terminal_title_item_id(item: &str) -> Option<&'static str> {
         "total-output-tokens" => Some("total-output-tokens"),
         "thread-id" | "session-id" => Some("thread-id"),
         "fast-mode" => Some("fast-mode"),
+        "daybreak" => Some("daybreak"),
         "model" | "model-name" => Some("model"),
         "model-with-reasoning" => Some("model-with-reasoning"),
         "reasoning" => Some("reasoning"),
@@ -309,11 +310,12 @@ mod tests {
     }
 
     #[test]
-    fn terminal_title_accepts_thread_usage_items() {
+    fn terminal_title_accepts_configured_items() {
         let check = terminal_title_check_from_inputs(TerminalTitleInputs {
             configured_items: Some(vec![
                 "thread-credits".to_string(),
                 "estimated-thread-cost".to_string(),
+                "daybreak".to_string(),
             ]),
             cwd: PathBuf::from("/workspace/project"),
             project_root: None,
@@ -321,11 +323,9 @@ mod tests {
 
         assert_eq!(check.status, CheckStatus::Ok);
         assert_eq!(check.summary, "terminal title configured");
-        assert!(
-            check.details.contains(
-                &"terminal title items: thread-credits, estimated-thread-cost".to_string()
-            )
-        );
+        assert!(check.details.contains(
+            &"terminal title items: thread-credits, estimated-thread-cost, daybreak".to_string()
+        ));
         assert!(check.issues.is_empty());
     }
 

codex-rs/tui/src/bottom_pane/status_line_setup.rs

@@ -141,6 +141,9 @@ pub(crate) enum StatusLineItem {
     /// Whether Fast mode is currently active.
     FastMode,
 
+    /// Whether Daybreak is enabled for this thread.
+    Daybreak,
+
     /// Whether raw scrollback mode is currently active.
     RawOutput,
 
@@ -204,6 +207,7 @@ impl StatusLineItem {
             }
             StatusLineItem::SessionId => "Current thread identifier (omitted until thread starts)",
             StatusLineItem::FastMode => "Whether Fast mode is currently active",
+            StatusLineItem::Daybreak => "Whether Daybreak is enabled for this thread",
             StatusLineItem::RawOutput => "Whether raw scrollback mode is active",
             StatusLineItem::ThreadName => "Current thread name (omitted when unnamed)",
             StatusLineItem::ThreadTitle => {
@@ -245,6 +249,7 @@ impl StatusLineItem {
             StatusLineItem::EstimatedThreadCost => StatusSurfacePreviewItem::EstimatedThreadCost,
             StatusLineItem::SessionId => StatusSurfacePreviewItem::SessionId,
             StatusLineItem::FastMode => StatusSurfacePreviewItem::FastMode,
+            StatusLineItem::Daybreak => StatusSurfacePreviewItem::Daybreak,
             StatusLineItem::RawOutput => StatusSurfacePreviewItem::RawOutput,
             StatusLineItem::ThreadName => StatusSurfacePreviewItem::ThreadName,
             StatusLineItem::ThreadTitle => StatusSurfacePreviewItem::ThreadTitle,

codex-rs/tui/src/bottom_pane/status_line_style.rs

@@ -54,7 +54,9 @@ impl StatusLineAccent {
             StatusLineItem::CodexVersion | StatusLineItem::Hostname | StatusLineItem::SessionId => {
                 Self::Metadata
             }
-            StatusLineItem::FastMode | StatusLineItem::RawOutput => Self::Mode,
+            StatusLineItem::FastMode | StatusLineItem::Daybreak | StatusLineItem::RawOutput => {
+                Self::Mode
+            }
             StatusLineItem::Permissions => Self::Mode,
             StatusLineItem::ApprovalMode => Self::Mode,
             StatusLineItem::ThreadName

codex-rs/tui/src/bottom_pane/status_surface_preview.rs

@@ -34,6 +34,7 @@ pub(crate) enum StatusSurfacePreviewItem {
     EstimatedThreadCost,
     SessionId,
     FastMode,
+    Daybreak,
     RawOutput,
     WorkspaceHeadline,
     Model,
@@ -71,6 +72,7 @@ impl StatusSurfacePreviewItem {
             StatusSurfacePreviewItem::EstimatedThreadCost => "~$1.82",
             StatusSurfacePreviewItem::SessionId => "550e8400-e29b-41d4",
             StatusSurfacePreviewItem::FastMode => "Fast on",
+            StatusSurfacePreviewItem::Daybreak => "Daybreak off",
             StatusSurfacePreviewItem::RawOutput => "raw output",
             StatusSurfacePreviewItem::WorkspaceHeadline => "Workspace headline",
             StatusSurfacePreviewItem::Model => "gpt-5.2-codex",
@@ -108,6 +110,7 @@ impl StatusSurfacePreviewItem {
             Self::EstimatedThreadCost,
             Self::SessionId,
             Self::FastMode,
+            Self::Daybreak,
             Self::RawOutput,
             Self::WorkspaceHeadline,
             Self::Model,

codex-rs/tui/src/bottom_pane/title_setup.rs

@@ -83,6 +83,8 @@ pub(crate) enum TerminalTitleItem {
     SessionId,
     /// Whether Fast mode is currently active.
     FastMode,
+    /// Whether Daybreak is enabled for this thread.
+    Daybreak,
     /// Current model name.
     #[strum(to_string = "model", serialize = "model-name")]
     Model,
@@ -135,6 +137,7 @@ impl TerminalTitleItem {
                 "Current thread identifier (omitted until thread starts)"
             }
             TerminalTitleItem::FastMode => "Whether Fast mode is currently active",
+            TerminalTitleItem::Daybreak => "Whether Daybreak is enabled for this thread",
             TerminalTitleItem::Model => "Current model name",
             TerminalTitleItem::ModelWithReasoning => "Current model name with reasoning level",
             TerminalTitleItem::Reasoning => "Current reasoning level",
@@ -170,6 +173,7 @@ impl TerminalTitleItem {
             }
             TerminalTitleItem::SessionId => Some(StatusSurfacePreviewItem::SessionId),
             TerminalTitleItem::FastMode => Some(StatusSurfacePreviewItem::FastMode),
+            TerminalTitleItem::Daybreak => Some(StatusSurfacePreviewItem::Daybreak),
             TerminalTitleItem::Model => Some(StatusSurfacePreviewItem::Model),
             TerminalTitleItem::ModelWithReasoning => {
                 Some(StatusSurfacePreviewItem::ModelWithReasoning)

codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__status_line_setup_popup_mixed.snap

@@ -12,9 +12,9 @@ expression: status_line_popup_snapshot(&mut chat)
   [x] project-name          Project name (omitted when unavailable)
   [x] git-branch            Current Git branch (omitted when unavailable)
   [x] thread-title          Current thread title, or thread identifier when unnamed
+  [x] daybreak              Whether Daybreak is enabled for this thread
   [ ] model                 Current model name
   [ ] model-with-reasoning  Current model name with reasoning level
-  [ ] reasoning             Current reasoning level
 ↓
-  my-project · feature/mixed-preview · Mixed preview thread
+  my-project · feature/mixed-preview · Mixed preview thread · Daybreak on
   space toggle · ←/→ reorder · enter save · esc cancel

codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__terminal_title_setup_popup_mixed.snap

@@ -10,11 +10,11 @@ expression: terminal_title_popup_snapshot(&mut chat)
 › [x] project-name   Project name (falls back to current directory name)
   [x] thread-title   Current thread title, or thread identifier when unnamed
   [x] task-progress  Latest task progress from update_plan (omitted until available)
+  [x] daybreak       Whether Daybreak is enabled for this thread
   [ ] app-name       Codex app name
   [ ] current-dir    Current working directory
   [ ] activity       Spinner while working, action-required message while blocked
   [ ] run-state      Compact session run-state text (Ready, Working, Thinking)
-  [ ] thread-name    Current thread name (omitted when unnamed)
 ↓
-  project | Mixed preview thread | Tasks 0/0
+  project | Mixed preview thread | Tasks 0/0 | Daybreak on
   space toggle · ←/→ reorder · enter save · esc cancel

codex-rs/tui/src/chatwidget/status_surfaces.rs

@@ -815,6 +815,13 @@ impl ChatWidget {
                         "Fast off".to_string()
                     }
                 }),
+            StatusLineItem::Daybreak => Some(
+                if self.daybreak_enabled && !self.side_conversation_active() {
+                    "Daybreak on".to_string()
+                } else {
+                    "Daybreak off".to_string()
+                },
+            ),
             StatusLineItem::RawOutput => self.raw_output_mode().then(|| "raw output".to_string()),
             StatusLineItem::ThreadName => {
                 self.thread_name.as_deref().and_then(normalize_thread_name)
@@ -868,6 +875,7 @@ impl ChatWidget {
             StatusSurfacePreviewItem::EstimatedThreadCost => StatusLineItem::EstimatedThreadCost,
             StatusSurfacePreviewItem::SessionId => StatusLineItem::SessionId,
             StatusSurfacePreviewItem::FastMode => StatusLineItem::FastMode,
+            StatusSurfacePreviewItem::Daybreak => StatusLineItem::Daybreak,
             StatusSurfacePreviewItem::RawOutput => StatusLineItem::RawOutput,
             StatusSurfacePreviewItem::WorkspaceHeadline => StatusLineItem::WorkspaceHeadline,
             StatusSurfacePreviewItem::Model => StatusLineItem::ModelName,
@@ -947,6 +955,9 @@ impl ChatWidget {
             TerminalTitleItem::FastMode => self
                 .status_line_value_for_item(StatusLineItem::FastMode)
                 .map(|value| Self::truncate_terminal_title_part(value, /*max_chars*/ 32)),
+            TerminalTitleItem::Daybreak => {
+                self.status_line_value_for_item(StatusLineItem::Daybreak)
+            }
             TerminalTitleItem::Model => Some(Self::truncate_terminal_title_part(
                 self.model_display_name().to_string(),
                 /*max_chars*/ 32,

codex-rs/tui/src/chatwidget/tests/status_surface_previews.rs

@@ -448,10 +448,12 @@ async fn status_line_setup_popup_mixed_snapshot() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     chat.status_line_branch = Some("feature/mixed-preview".to_string());
     chat.thread_name = Some("Mixed preview thread".to_string());
+    chat.set_daybreak_enabled(/*enabled*/ true);
     chat.local_settings.tui.status_line = Some(vec![
         "project-name".to_string(),
         "git-branch".to_string(),
         "thread-title".to_string(),
+        "daybreak".to_string(),
     ]);
 
     assert_chatwidget_snapshot!(
@@ -499,10 +501,12 @@ async fn terminal_title_setup_popup_hardcoded_only_snapshot() {
 async fn terminal_title_setup_popup_mixed_snapshot() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
     chat.thread_name = Some("Mixed preview thread".to_string());
+    chat.set_daybreak_enabled(/*enabled*/ true);
     chat.local_settings.tui.terminal_title = Some(vec![
         "project-name".to_string(),
         "thread-title".to_string(),
         "task-progress".to_string(),
+        "daybreak".to_string(),
     ]);
 
     assert_chatwidget_snapshot!(

codex-rs/tui/src/chatwidget/tests/terminal_title.rs

@@ -4,6 +4,34 @@ use super::*;
 use crate::bottom_pane::goal_status_indicator_line;
 use pretty_assertions::assert_eq;
 
+#[tokio::test]
+async fn daybreak_status_surfaces_follow_the_thread_preference() {
+    let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
+    chat.local_settings.tui.terminal_title = Some(vec!["daybreak".into()]);
+    let mut values = Vec::new();
+    for enabled in [false, true] {
+        chat.daybreak_enabled = enabled;
+        chat.refresh_terminal_title();
+        values.push(format!(
+            "{} | {}",
+            chat.status_line_value(StatusLineItem::Daybreak).unwrap(),
+            chat.last_terminal_title.as_deref().unwrap()
+        ));
+    }
+    chat.set_side_conversation_active(/*active*/ true);
+    chat.refresh_terminal_title();
+    values.push(format!(
+        "{} | {}",
+        chat.status_line_value(StatusLineItem::Daybreak).unwrap(),
+        chat.last_terminal_title.as_deref().unwrap()
+    ));
+    insta::assert_snapshot!(values.join("\n"), @r"
+    Daybreak off | Daybreak off
+    Daybreak on | Daybreak on
+    Daybreak off | Daybreak off
+    ");
+}
+
 #[tokio::test]
 async fn goal_clock_refresh_redraws_only_when_elapsed_label_changes() {
     let (frame_requester, mut draw_rx) = FrameRequester::test_channel();