chore[multi-agent]: debug UI

codex-rs/tui/src/app.rs

@@ -693,6 +693,19 @@ impl App {
                     }
                 }
             }
+            AppEvent::InsertEphemeralHistoryLines(lines) => {
+                if lines.is_empty() {
+                    return Ok(true);
+                }
+                // Ephemeral lines are appended to the inline viewport only and do not
+                // update the persisted transcript_cells.
+                self.has_emitted_history_lines = true;
+                if self.overlay.is_some() {
+                    self.deferred_history_lines.extend(lines);
+                } else {
+                    tui.insert_history_lines(lines);
+                }
+            }
             AppEvent::StartCommitAnimation => {
                 if self
                     .commit_anim_running
@@ -736,6 +749,12 @@ impl App {
                 return Ok(false);
             }
             AppEvent::CodexOp(op) => self.chat_widget.submit_op(op),
+            AppEvent::SwitchAgent { agent_id } => {
+                self.chat_widget.switch_to_agent(agent_id);
+            }
+            AppEvent::CreateAgentFromComposer { agent_id } => {
+                self.chat_widget.create_agent_from_composer(agent_id);
+            }
             AppEvent::DiffResult(text) => {
                 // Clear the in-progress state in the bottom pane
                 self.chat_widget.on_diff_complete();

codex-rs/tui/src/app_event.rs

@@ -6,6 +6,7 @@ use codex_core::protocol::Event;
 use codex_core::protocol::RateLimitSnapshot;
 use codex_file_search::FileMatch;
 use codex_protocol::openai_models::ModelPreset;
+use ratatui::text::Line;
 
 use crate::bottom_pane::ApprovalRequest;
 use crate::history_cell::HistoryCell;
@@ -54,6 +55,9 @@ pub(crate) enum AppEvent {
 
     InsertHistoryCell(Box<dyn HistoryCell>),
 
+    /// Insert lines into the inline viewport only (do not persist to transcript).
+    InsertEphemeralHistoryLines(Vec<Line<'static>>),
+
     StartCommitAnimation,
     StopCommitAnimation,
     CommitTick,
@@ -156,6 +160,18 @@ pub(crate) enum AppEvent {
     /// Re-open the approval presets popup.
     OpenApprovalsPopup,
 
+    /// Switch the active agent view.
+    SwitchAgent {
+        agent_id: String,
+    },
+
+    /// Create (if needed) a new agent and submit the current composer draft to it.
+    ///
+    /// Triggered by Ctrl+N in the chat view.
+    CreateAgentFromComposer {
+        agent_id: String,
+    },
+
     /// Forwarded conversation history snapshot from the current conversation.
     ConversationHistory(ConversationPathResponseEvent),