From e1952d35e694904abb08dafc516c4be838dc9ca5 Mon Sep 17 00:00:00 2001
From: MoerAI <friendnt@g.skku.edu>
Date: Wed, 4 Mar 2026 12:24:22 +0900
Subject: [PATCH] fix(tmux): handle \r line endings and missing pane_title in
 list-panes

Strip \r characters from list-panes output to handle Windows-style line
endings. Also relax field count check from 9 to 8 to handle cases where
pane_title is empty or missing, which caused the parser to drop pane
rows and fail to determine the main pane in single-pane sessions.

Fixes #2241
---
 src/features/tmux-subagent/pane-state-querier.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/features/tmux-subagent/pane-state-querier.ts b/src/features/tmux-subagent/pane-state-querier.ts
index 28d5158a44..2c581163dd 100644
--- a/src/features/tmux-subagent/pane-state-querier.ts
+++ b/src/features/tmux-subagent/pane-state-querier.ts
@@ -27,7 +27,7 @@ export async function queryWindowState(sourcePaneId: string): Promise<WindowStat
     return null
   }
 
-  const lines = stdout.trim().split("\n").filter(Boolean)
+  const lines = stdout.trim().replace(/\r/g, "").split("\n").filter(Boolean)
   if (lines.length === 0) return null
 
   let windowWidth = 0
@@ -36,10 +36,10 @@ export async function queryWindowState(sourcePaneId: string): Promise<WindowStat
 
   for (const line of lines) {
 		const fields = line.split("\t")
-		if (fields.length < 9) continue
+		if (fields.length < 8) continue
 
 		const [paneId, widthStr, heightStr, leftStr, topStr, activeStr, windowWidthStr, windowHeightStr] = fields
-		const title = fields.slice(8).join("\t")
+		const title = fields.length > 8 ? fields.slice(8).join("\t") : ""
     const width = parseInt(widthStr, 10)
     const height = parseInt(heightStr, 10)
     const left = parseInt(leftStr, 10)