fix: stop marking codex background terminals as working

docs/next/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Fixed
 - Agent state detection for non-authoritative agents now comes from screen manifests instead of PTY-first semantic arbitration, so terminal output activity no longer publishes `working`, vetoes visible blockers, or decides idle fallback.
+- Codex background terminal status text no longer overrides Codex's foreground idle OSC status, so long-running helpers such as dev servers do not keep the pane marked working.
 - Removed the remaining PTY input-taint debounce from agent detection, so user input, pane resizes, and redraw nudges no longer delay screen/OSC manifest state updates.
 - Numeric keypad keys that send VT100 application-keypad escape sequences now enter their digits and operators instead of being dropped. (#493)
 - 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)

src/detect/manifest/tests.rs

@@ -648,18 +648,17 @@ fn codex_osc_title_plain_is_idle() {
 }
 
 #[test]
-fn codex_background_terminal_screen_beats_osc_idle() {
-    // Codex doesn't set is_task_running() for background terminals, so title is
-    // plain (idle). The screen rule background_terminal_working at priority 800
-    // beats osc_title_idle at priority 100.
+fn codex_background_terminal_screen_does_not_override_osc_idle() {
+    // Background terminal tasks can be long-lived helpers such as dev servers.
+    // They should not make Codex look busy once the foreground turn is idle.
     let screen = "background terminal running · /ps to view · /stop to close\n";
     let result = osc_explain(Agent::Codex, screen, "llm-proxy", "");
-    assert_eq!(result.state, AgentState::Working);
+    assert_eq!(result.state, AgentState::Idle);
     assert_eq!(
         result.matched_rule.as_ref().map(|r| r.id.as_str()),
-        Some("background_terminal_working")
+        Some("osc_title_idle")
     );
-    assert!(result.visible_working);
+    assert!(result.visible_idle);
 }
 
 #[test]

src/detect/manifests/codex.toml

@@ -1,5 +1,5 @@
 id = "codex"
-version = "2026.06.10.2"
+version = "2026.06.10.3"
 min_engine_version = 2
 updated_at = "2026-06-10T00:00:00Z"
 
@@ -44,19 +44,6 @@ any = [
   { contains = ["allow command?"] },
 ]
 
-[[rules]]
-id = "background_terminal_working"
-state = "working"
-priority = 800
-region = "bottom_non_empty_lines(6)"
-visible_working = true
-any = [
-  { contains = ["background terminal running"] },
-  { contains = ["Waiting for background terminal"] },
-  { contains = ["/ps to view"] },
-  { contains = ["/stop to close"] },
-]
-
 [[rules]]
 id = "weak_blocker"
 state = "blocked"

website/agent-detection/codex.toml

@@ -1,5 +1,5 @@
 id = "codex"
-version = "2026.06.10.2"
+version = "2026.06.10.3"
 min_engine_version = 2
 updated_at = "2026-06-10T00:00:00Z"
 
@@ -44,19 +44,6 @@ any = [
   { contains = ["allow command?"] },
 ]
 
-[[rules]]
-id = "background_terminal_working"
-state = "working"
-priority = 800
-region = "bottom_non_empty_lines(6)"
-visible_working = true
-any = [
-  { contains = ["background terminal running"] },
-  { contains = ["Waiting for background terminal"] },
-  { contains = ["/ps to view"] },
-  { contains = ["/stop to close"] },
-]
-
 [[rules]]
 id = "weak_blocker"
 state = "blocked"