From c714e4c20e3272c21722a6f083fc2d592c244385 Mon Sep 17 00:00:00 2001
From: JJ Liebig <jonathan.liebig@gmail.com>
Date: Sat, 22 Aug 2026 22:34:38 +0200
Subject: fix: clear Windows Terminal identity in panes (#3127)

---
 src/pane.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/pane.rs b/src/pane.rs
index b2e1603d..9f2416ab 100644
--- a/src/pane.rs
+++ b/src/pane.rs
@@ -78,6 +78,7 @@ fn apply_pane_terminal_env(cmd: &mut CommandBuilder) {
     // when the remote side lacks matching terminfo entries.
     cmd.env("TERM", PANE_TERM);
     cmd.env("COLORTERM", PANE_COLORTERM);
+    cmd.env_remove("WT_SESSION");
 }
 
 #[derive(Debug, Clone, Default, PartialEq, Eq)]
@@ -3101,6 +3102,16 @@ mod tests {
         assert!(cmd.get_env("CODEX_THREAD_ID").is_none());
     }
 
+    #[test]
+    fn pane_terminal_identity_removes_outer_windows_terminal_session() {
+        let mut cmd = CommandBuilder::new("shell");
+        cmd.env("WT_SESSION", "outer-session");
+
+        apply_pane_terminal_env(&mut cmd);
+
+        assert!(cmd.get_env("WT_SESSION").is_none());
+    }
+
     #[tokio::test]
     async fn cwd_returns_accepted_report_without_rechecking_filesystem() {
         let stamp = std::time::SystemTime::now()
-- 
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