Use subagents naming in the TUI (#14618)

- rename user-facing TUI multi-agent wording to subagents
- rename the surfaced slash command to `subagents` and update
tests/snapshots

Co-authored-by: Codex <noreply@openai.com>

codex-rs/core/src/features.rs

@@ -701,9 +701,9 @@ pub const FEATURES: &[FeatureSpec] = &[
         id: Feature::Collab,
         key: "multi_agent",
         stage: Stage::Experimental {
-            name: "Multi-agents",
-            menu_description: "Ask Codex to spawn multiple agents to parallelize the work and win in efficiency.",
-            announcement: "NEW: Multi-agents can now be spawned by Codex. Enable in /experimental and restart Codex!",
+            name: "Subagents",
+            menu_description: "Ask Codex to spawn subagents to parallelize the work and move faster.",
+            announcement: "NEW: Subagents can now be spawned by Codex. Enable in /experimental and restart Codex!",
         },
         default_enabled: false,
     },

codex-rs/tui/src/app.rs

@@ -1437,7 +1437,7 @@ impl App {
             .collect();
 
         self.chat_widget.show_selection_view(SelectionViewParams {
-            title: Some("Multi-agents".to_string()),
+            title: Some("Subagents".to_string()),
             subtitle: Some(AgentNavigationState::picker_subtitle()),
             footer_hint: Some(standard_popup_hint_line()),
             items,
@@ -5093,7 +5093,7 @@ mod tests {
             .map(|line| line.to_string())
             .collect::<Vec<_>>()
             .join("\n");
-        assert!(rendered.contains("Multi-agent will be enabled in the next session."));
+        assert!(rendered.contains("Subagents will be enabled in the next session."));
         Ok(())
     }
 

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

@@ -351,7 +351,7 @@ mod tests {
                 CommandItem::UserPrompt(_) => None,
             })
             .collect();
-        assert_eq!(cmds, vec!["model", "mention", "mcp", "multi-agents"]);
+        assert_eq!(cmds, vec!["model", "mention", "mcp"]);
     }
 
     #[test]

codex-rs/tui/src/chatwidget.rs

@@ -172,10 +172,10 @@ const PLAN_IMPLEMENTATION_TITLE: &str = "Implement this plan?";
 const PLAN_IMPLEMENTATION_YES: &str = "Yes, implement this plan";
 const PLAN_IMPLEMENTATION_NO: &str = "No, stay in Plan mode";
 const PLAN_IMPLEMENTATION_CODING_MESSAGE: &str = "Implement the plan.";
-const MULTI_AGENT_ENABLE_TITLE: &str = "Enable multi-agent?";
+const MULTI_AGENT_ENABLE_TITLE: &str = "Enable subagents?";
 const MULTI_AGENT_ENABLE_YES: &str = "Yes, enable";
 const MULTI_AGENT_ENABLE_NO: &str = "Not now";
-const MULTI_AGENT_ENABLE_NOTICE: &str = "Multi-agent will be enabled in the next session.";
+const MULTI_AGENT_ENABLE_NOTICE: &str = "Subagents will be enabled in the next session.";
 const PLAN_MODE_REASONING_SCOPE_TITLE: &str = "Apply reasoning change";
 const PLAN_MODE_REASONING_SCOPE_PLAN_ONLY: &str = "Apply to Plan mode override";
 const PLAN_MODE_REASONING_SCOPE_ALL_MODES: &str = "Apply to global default and Plan mode override";
@@ -1759,7 +1759,7 @@ impl ChatWidget {
             },
             SelectionItem {
                 name: MULTI_AGENT_ENABLE_NO.to_string(),
-                description: Some("Keep multi-agent disabled.".to_string()),
+                description: Some("Keep subagents disabled.".to_string()),
                 dismiss_on_select: true,
                 ..Default::default()
             },
@@ -1767,7 +1767,7 @@ impl ChatWidget {
 
         self.bottom_pane.show_selection_view(SelectionViewParams {
             title: Some(MULTI_AGENT_ENABLE_TITLE.to_string()),
-            subtitle: Some("Multi-agent is currently disabled in your config.".to_string()),
+            subtitle: Some("Subagents are currently disabled in your config.".to_string()),
             footer_hint: Some(standard_popup_hint_line()),
             items,
             ..Default::default()

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

@@ -3,10 +3,10 @@ source: tui/src/chatwidget/tests.rs
 assertion_line: 6001
 expression: popup
 ---
-  Enable multi-agent?
-  Multi-agent is currently disabled in your config.
+  Enable subagents?
+  Subagents are currently disabled in your config.
 
 › 1. Yes, enable  Save the setting now. You will need a new session to use it.
-  2. Not now      Keep multi-agent disabled.
+  2. Not now      Keep subagents disabled.
 
   Press enter to confirm or esc to go back

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

@@ -7429,7 +7429,7 @@ async fn multi_agent_enable_prompt_updates_feature_and_emits_notice() {
         other => panic!("expected InsertHistoryCell event, got {other:?}"),
     };
     let rendered = lines_to_single_string(&cell.display_lines(120));
-    assert!(rendered.contains("Multi-agent will be enabled in the next session."));
+    assert!(rendered.contains("Subagents will be enabled in the next session."));
 }
 
 #[tokio::test]

codex-rs/tui/src/slash_command.rs

@@ -54,6 +54,7 @@ pub enum SlashCommand {
     Realtime,
     Settings,
     TestApproval,
+    #[strum(serialize = "subagents")]
     MultiAgents,
     // Debugging commands.
     #[strum(serialize = "debug-m-drop")]