Add debug-only slash command for rollout path (#5936)

## Summary
- add a debug-only `/rollout` slash command that prints the rollout file
path or reports when none is known
- surface the new command in the slash command metadata and cover it
with unit tests

<img width="539" height="99" alt="image"
src="https://github.com/user-attachments/assets/688e1334-8a06-4576-abb8-ada33b458661"
/>

codex-rs/tui/src/chatwidget.rs

@@ -1270,7 +1270,16 @@ impl ChatWidget {
             SlashCommand::Mcp => {
                 self.add_mcp_output();
             }
-            #[cfg(debug_assertions)]
+            SlashCommand::Rollout => {
+                if let Some(path) = self.rollout_path() {
+                    self.add_info_message(
+                        format!("Current rollout path: {}", path.display()),
+                        None,
+                    );
+                } else {
+                    self.add_info_message("Rollout path is not available yet.".to_string(), None);
+                }
+            }
             SlashCommand::TestApproval => {
                 use codex_core::protocol::EventMsg;
                 use std::collections::HashMap;

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

@@ -863,6 +863,42 @@ fn slash_undo_sends_op() {
     }
 }
 
+#[test]
+fn slash_rollout_displays_current_path() {
+    let (mut chat, mut rx, _op_rx) = make_chatwidget_manual();
+    let rollout_path = PathBuf::from("/tmp/codex-test-rollout.jsonl");
+    chat.current_rollout_path = Some(rollout_path.clone());
+
+    chat.dispatch_command(SlashCommand::Rollout);
+
+    let cells = drain_insert_history(&mut rx);
+    assert_eq!(cells.len(), 1, "expected info message for rollout path");
+    let rendered = lines_to_single_string(&cells[0]);
+    assert!(
+        rendered.contains(&rollout_path.display().to_string()),
+        "expected rollout path to be shown: {rendered}"
+    );
+}
+
+#[test]
+fn slash_rollout_handles_missing_path() {
+    let (mut chat, mut rx, _op_rx) = make_chatwidget_manual();
+
+    chat.dispatch_command(SlashCommand::Rollout);
+
+    let cells = drain_insert_history(&mut rx);
+    assert_eq!(
+        cells.len(),
+        1,
+        "expected info message explaining missing path"
+    );
+    let rendered = lines_to_single_string(&cells[0]);
+    assert!(
+        rendered.contains("not available"),
+        "expected missing rollout path message: {rendered}"
+    );
+}
+
 #[test]
 fn undo_success_events_render_info_messages() {
     let (mut chat, mut rx, _op_rx) = make_chatwidget_manual();

codex-rs/tui/src/slash_command.rs

@@ -26,7 +26,7 @@ pub enum SlashCommand {
     Logout,
     Quit,
     Feedback,
-    #[cfg(debug_assertions)]
+    Rollout,
     TestApproval,
 }
 
@@ -48,7 +48,7 @@ impl SlashCommand {
             SlashCommand::Approvals => "choose what Codex can do without approval",
             SlashCommand::Mcp => "list configured MCP tools",
             SlashCommand::Logout => "log out of Codex",
-            #[cfg(debug_assertions)]
+            SlashCommand::Rollout => "print the rollout file path",
             SlashCommand::TestApproval => "test approval request",
         }
     }
@@ -76,14 +76,23 @@ impl SlashCommand {
             | SlashCommand::Mcp
             | SlashCommand::Feedback
             | SlashCommand::Quit => true,
-
-            #[cfg(debug_assertions)]
+            SlashCommand::Rollout => true,
             SlashCommand::TestApproval => true,
         }
     }
+
+    fn is_visible(self) -> bool {
+        match self {
+            SlashCommand::Rollout | SlashCommand::TestApproval => cfg!(debug_assertions),
+            _ => true,
+        }
+    }
 }
 
 /// Return all built-in commands in a Vec paired with their command string.
 pub fn built_in_slash_commands() -> Vec<(&'static str, SlashCommand)> {
-    SlashCommand::iter().map(|c| (c.command(), c)).collect()
+    SlashCommand::iter()
+        .filter(|command| command.is_visible())
+        .map(|c| (c.command(), c))
+        .collect()
 }