codex: fix cleared git metadata reads

codex-rs/app-server/src/codex_message_processor.rs

@@ -3208,6 +3208,9 @@ impl CodexMessageProcessor {
             Some(None) => Some(None),
             None => None,
         };
+        let clears_git_info = matches!(git_sha, Some(None))
+            || matches!(git_branch, Some(None))
+            || matches!(git_origin_url, Some(None));
 
         let updated = match state_db_ctx
             .update_thread_git_info(
@@ -3236,6 +3239,18 @@ impl CodexMessageProcessor {
             .await;
             return;
         }
+        if clears_git_info
+            && let Err(err) = state_db_ctx
+                .touch_thread_updated_at(thread_uuid, Utc::now())
+                .await
+        {
+            self.send_internal_error(
+                request_id,
+                format!("failed to touch thread metadata for {thread_uuid}: {err}"),
+            )
+            .await;
+            return;
+        }
 
         let Some(summary) =
             read_summary_from_state_db_context_by_thread_id(Some(&state_db_ctx), thread_uuid).await

codex-rs/thread-store/src/local/read_thread.rs

@@ -114,6 +114,8 @@ async fn read_thread_from_rollout_path(
         }
         if let Some(git_info) = git_info_from_metadata(&metadata) {
             thread.git_info = Some(git_info);
+        } else if metadata.updated_at > thread.updated_at {
+            thread.git_info = None;
         }
     }
     if !found_sqlite_title