fix: avoid inferring codex idle from terminal output (#4563)

refs #4507

1 files changed, 7 insertions, 20 deletions

diff --git a/src/detect/manifest.rs b/src/detect/manifest.rs
index acd6b8f9..e224adfe 100644
--- a/src/detect/manifest.rs
+++ b/src/detect/manifest.rs
@@ -416,23 +416,6 @@ pub fn explain_for_label(agent_label: &str, screen_content: &str) -> DetectionEx
     explain(agent, screen_content)
 }
 
-pub fn should_skip_state_update(agent: Agent, screen_content: &str) -> bool {
-    let Some(loaded) = load_manifest(agent) else {
-        return false;
-    };
-    evaluate_loaded_manifest(
-        agent,
-        DetectionInput {
-            screen: screen_content,
-            osc_title: "",
-            osc_progress: "",
-        },
-        loaded,
-        false,
-    )
-    .skip_state_update
-}
-
 impl DetectionExplain {
     fn into_detection(self) -> AgentDetection {
         AgentDetection {
@@ -557,14 +540,14 @@ fn fallback_explain(
             )
         })
         .unwrap_or((None, Vec::new(), None, None, None, false));
-    let known_agent = agent.is_some();
+    let assume_idle = agent.is_some_and(|agent| agent != Agent::Codex);
     let remote_update_status = include_update_status
         .then(|| agent.and_then(remote_update_status))
         .flatten();
 
     DetectionExplain {
         agent: agent.map(|agent| agent_label(agent).to_string()),
-        state: if known_agent {
+        state: if assume_idle {
             AgentState::Idle
         } else {
             AgentState::Unknown
@@ -577,7 +560,11 @@ fn fallback_explain(
         visible_working: false,
         skip_state_update: false,
         skipped_update_reason: None,
-        fallback_reason: known_agent.then(|| DEFAULT_KNOWN_AGENT_IDLE_FALLBACK.to_string()),
+        fallback_reason: match agent {
+            Some(Agent::Codex) => Some("codex_state_ambiguous".to_string()),
+            Some(_) => Some(DEFAULT_KNOWN_AGENT_IDLE_FALLBACK.to_string()),
+            None => None,
+        },
         evaluated_rules,
         warning,
         manifest_version,