chore: thread tui

codex-rs/tui/src/bottom_pane/snapshots/codex_tui__bottom_pane__title_setup__tests__terminal_title_setup_basic.snap

@@ -11,7 +11,7 @@ expression: "render_lines(&view, 84)"
 › [x] project-name       Project name (falls back to current directory name)        
   [x] activity           Spinner while working, action-required message while blo…  
   [x] run-state          Compact session run-state text (Ready, Working, Thinking)  
-  [x] thread-title       Current thread title (omitted when unavailable)            
+  [x] thread-title       Current thread title, or thread identifier when unnamed    
   [ ] app-name           Codex app name                                             
   [ ] current-dir        Current working directory                                  
   [ ] git-branch         Current Git branch (omitted when unavailable)              

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

@@ -14,7 +14,7 @@
 //! - Git information (branch name)
 //! - Context usage (remaining %, used %, window size)
 //! - Usage limits (5-hour, weekly)
-//! - Session info (thread title, ID, tokens used)
+//! - Session info (thread title, thread ID, tokens used)
 //! - Application version
 
 use ratatui::buffer::Buffer;
@@ -46,7 +46,7 @@ const STATUS_LINE_USE_THEME_COLORS_ITEM_ID: &str = "status-line-use-theme-colors
 /// Some items are conditionally displayed based on availability:
 /// - Git-related items only show when in a git repository
 /// - Context/limit items only show when data is available from the API
-/// - Session ID only shows after a session has started
+/// - Thread ID only shows after a session has started
 #[derive(EnumIter, EnumString, Display, Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd)]
 #[strum(serialize_all = "kebab_case")]
 pub(crate) enum StatusLineItem {
@@ -111,7 +111,8 @@ pub(crate) enum StatusLineItem {
     /// Total output tokens generated.
     TotalOutputTokens,
 
-    /// Full session UUID.
+    /// Full thread UUID.
+    #[strum(to_string = "thread-id", serialize = "session-id")]
     SessionId,
 
     /// Whether Fast mode is currently active.
@@ -162,12 +163,12 @@ impl StatusLineItem {
             StatusLineItem::UsedTokens => "Total tokens used in session (omitted when zero)",
             StatusLineItem::TotalInputTokens => "Total input tokens used in session",
             StatusLineItem::TotalOutputTokens => "Total output tokens used in session",
-            StatusLineItem::SessionId => {
-                "Current session identifier (omitted until session starts)"
-            }
+            StatusLineItem::SessionId => "Current thread identifier (omitted until thread starts)",
             StatusLineItem::FastMode => "Whether Fast mode is currently active",
             StatusLineItem::RawOutput => "Whether raw scrollback mode is active",
-            StatusLineItem::ThreadTitle => "Current thread title (omitted when unavailable)",
+            StatusLineItem::ThreadTitle => {
+                "Current thread title, or thread identifier when unnamed"
+            }
             StatusLineItem::TaskProgress => {
                 "Latest task progress from update_plan (omitted until available)"
             }

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

@@ -71,7 +71,8 @@ pub(crate) enum TerminalTitleItem {
     TotalInputTokens,
     /// Total output tokens generated.
     TotalOutputTokens,
-    /// Full session UUID.
+    /// Full thread UUID.
+    #[strum(to_string = "thread-id", serialize = "session-id")]
     SessionId,
     /// Whether Fast mode is currently active.
     FastMode,
@@ -96,7 +97,7 @@ impl TerminalTitleItem {
             TerminalTitleItem::Status => {
                 "Compact session run-state text (Ready, Working, Thinking)"
             }
-            TerminalTitleItem::Thread => "Current thread title (omitted when unavailable)",
+            TerminalTitleItem::Thread => "Current thread title, or thread identifier when unnamed",
             TerminalTitleItem::GitBranch => "Current Git branch (omitted when unavailable)",
             TerminalTitleItem::ContextRemaining => {
                 "Percentage of context window remaining (omitted when unknown)"
@@ -115,7 +116,7 @@ impl TerminalTitleItem {
             TerminalTitleItem::TotalInputTokens => "Total input tokens used in session",
             TerminalTitleItem::TotalOutputTokens => "Total output tokens used in session",
             TerminalTitleItem::SessionId => {
-                "Current session identifier (omitted until session starts)"
+                "Current thread identifier (omitted until thread starts)"
             }
             TerminalTitleItem::FastMode => "Whether Fast mode is currently active",
             TerminalTitleItem::Model => "Current model name",

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

@@ -11,7 +11,7 @@ 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 (omitted when unavailable)
+  [x] thread-title          Current thread title, or thread identifier when unnamed
   [ ] model                 Current model name
   [ ] model-with-reasoning  Current model name with reasoning level
   [ ] current-dir           Current working directory

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

@@ -11,7 +11,7 @@ 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 (omitted when unavailable)
+  [x] thread-title          Current thread title, or thread identifier when unnamed
   [ ] model                 Current model name
   [ ] model-with-reasoning  Current model name with reasoning level
   [ ] current-dir           Current working directory

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

@@ -11,7 +11,7 @@ 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 (omitted when unavailable)
+  [x] thread-title          Current thread title, or thread identifier when unnamed
   [ ] model                 Current model name
   [ ] model-with-reasoning  Current model name with reasoning level
   [ ] current-dir           Current working directory

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

@@ -7,7 +7,7 @@ expression: terminal_title_popup_snapshot(&mut chat)
 
   Type to search
   >
-› [x] thread-title   Current thread title (omitted when unavailable)
+› [x] thread-title   Current thread title, or thread identifier when unnamed
   [x] git-branch     Current Git branch (omitted when unavailable)
   [x] task-progress  Latest task progress from update_plan (omitted until available)
   [ ] app-name       Codex app name

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

@@ -8,7 +8,7 @@ expression: terminal_title_popup_snapshot(&mut chat)
   Type to search
   >
 › [x] project-name   Project name (falls back to current directory name)
-  [x] thread-title   Current thread title (omitted when unavailable)
+  [x] thread-title   Current thread title, or thread identifier when unnamed
   [x] git-branch     Current Git branch (omitted when unavailable)
   [x] task-progress  Latest task progress from update_plan (omitted until available)
   [ ] app-name       Codex app name

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

@@ -8,7 +8,7 @@ expression: terminal_title_popup_snapshot(&mut chat)
   Type to search
   >
 › [x] project-name   Project name (falls back to current directory name)
-  [x] thread-title   Current thread title (omitted when unavailable)
+  [x] thread-title   Current thread title, or thread identifier when unnamed
   [x] task-progress  Latest task progress from update_plan (omitted until available)
   [ ] app-name       Codex app name
   [ ] current-dir    Current working directory

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

@@ -648,10 +648,17 @@ impl ChatWidget {
                 },
             ),
             StatusLineItem::RawOutput => self.raw_output_mode().then(|| "raw output".to_string()),
-            StatusLineItem::ThreadTitle => self.thread_name.as_ref().and_then(|name| {
-                let trimmed = name.trim();
-                (!trimmed.is_empty()).then(|| trimmed.to_string())
-            }),
+            StatusLineItem::ThreadTitle => self.thread_name.as_ref().map_or_else(
+                || self.thread_id.map(|id| id.to_string()),
+                |name| {
+                    let trimmed = name.trim();
+                    if trimmed.is_empty() {
+                        self.thread_id.map(|id| id.to_string())
+                    } else {
+                        Some(trimmed.to_string())
+                    }
+                },
+            ),
             StatusLineItem::TaskProgress => self.terminal_title_task_progress(),
         }
     }
@@ -713,17 +720,9 @@ impl ChatWidget {
             )),
             TerminalTitleItem::Spinner => self.terminal_title_spinner_text_at(now),
             TerminalTitleItem::Status => Some(self.run_state_status_text()),
-            TerminalTitleItem::Thread => self.thread_name.as_ref().and_then(|name| {
-                let trimmed = name.trim();
-                if trimmed.is_empty() {
-                    None
-                } else {
-                    Some(Self::truncate_terminal_title_part(
-                        trimmed.to_string(),
-                        /*max_chars*/ 48,
-                    ))
-                }
-            }),
+            TerminalTitleItem::Thread => self
+                .status_line_value_for_item(StatusLineItem::ThreadTitle)
+                .map(|value| Self::truncate_terminal_title_part(value, /*max_chars*/ 48)),
             TerminalTitleItem::GitBranch => self.status_line_branch.as_ref().map(|branch| {
                 Self::truncate_terminal_title_part(branch.clone(), /*max_chars*/ 32)
             }),

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

@@ -123,6 +123,22 @@ async fn status_surface_preview_lines_hardcoded_only_snapshot() {
     assert_chatwidget_snapshot!("status_surface_previews_hardcoded_only", snapshot);
 }
 
+#[tokio::test]
+async fn thread_title_falls_back_to_thread_id_when_unnamed() {
+    let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;
+    let thread_id = ThreadId::new();
+    chat.thread_id = Some(thread_id);
+
+    assert_eq!(
+        status_preview_line(&mut chat, &[StatusLineItem::ThreadTitle]),
+        thread_id.to_string()
+    );
+    assert_eq!(
+        title_preview_line(&mut chat, &[TerminalTitleItem::Thread]),
+        thread_id.to_string()
+    );
+}
+
 #[tokio::test]
 async fn status_line_setup_popup_hardcoded_only_snapshot() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(/*model_override*/ None).await;