fix: detect codex interrupt status headers

refs #501

docs/next/CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 ### Fixed
+- Codex panes now stay marked working when the live status header uses reasoning-summary text such as `Investigating code output` instead of the literal `Working` label. (#501)
 - Native pane URL clicks now use Cmd-click on macOS and Ctrl-click on other platforms.
 - Windows beta installs now default to the preview channel, persist `channel = "preview"` during install, reject switching to stable until stable Windows builds exist, and update through the Windows installer without probing unsupported live-handoff/session status paths.
 - Pane output now renders flag emoji and other multi-codepoint grapheme clusters as complete symbols instead of blank cells. (#243)

src/detect/agents/codex.rs

@@ -152,6 +152,7 @@ fn codex_working_status_line(line: &str) -> bool {
     trimmed.starts_with('•')
         && (trimmed.contains("Working (")
             || trimmed.contains("Waiting for background terminal (")
+            || lower.contains(" • esc to interrupt")
             || lower.contains("reviewing approval request (")
             || (lower.contains("reviewing ") && lower.contains(" approval requests ("))
             || trimmed.contains("Booting MCP server:"))

src/detect/mod.rs

@@ -1566,6 +1566,18 @@ mod tests {
         assert!(!detection.visible_idle);
     }
 
+    #[test]
+    fn codex_generic_interrupt_status_above_current_prompt_stays_working() {
+        let detection = detect_agent(
+            Some(Agent::Codex),
+            "• I need to inspect more code first.\n\n• Investigating code output (44s • esc to interrupt)\n\n\n› Summarize recent commits\n\n  gpt-5.5 high · ~/Codes/herdr",
+        );
+
+        assert_eq!(detection.state, AgentState::Working);
+        assert!(detection.visible_working);
+        assert!(!detection.visible_idle);
+    }
+
     #[test]
     fn codex_background_terminal_status_above_current_prompt_stays_working() {
         let detection = detect_agent(