From 73915464e9e805ec191fdad6cafbead76b3a60fc Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 4 Jul 2026 16:44:28 +0900
Subject: tmux: work around for tmux 3.7 bug

---
 home-manager/config/tmux/tmux.conf |  3 ++-
 justfile                           | 11 +++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/home-manager/config/tmux/tmux.conf b/home-manager/config/tmux/tmux.conf
index dd8ab2f..bca137c 100644
--- a/home-manager/config/tmux/tmux.conf
+++ b/home-manager/config/tmux/tmux.conf
@@ -51,7 +51,8 @@ bind-key -T tw h split-window -h -b -c "#{pane_current_path}"
 bind-key -T tw j split-window -v -c "#{pane_current_path}"
 bind-key -T tw k split-window -v -b -c "#{pane_current_path}"
 bind-key -T tw l split-window -h -c "#{pane_current_path}"
-bind-key T break-pane
+# Workaround: https://github.com/tmux/tmux/blob/3.7a/CHANGES#L3
+bind-key T break-pane -n '#{pane_current_command}'
 bind-key h select-pane -L
 bind-key j select-pane -D
 bind-key k select-pane -U
diff --git a/justfile b/justfile
index 963df53..a567983 100644
--- a/justfile
+++ b/justfile
@@ -17,6 +17,17 @@ update-and-commit HOST:
     git add -- flake.lock home-manager/package-versions.txt
     git commit -m "nix: update flake"
     git diff --color=always HEAD~ -- home-manager/package-versions.txt
+    just check-tmux-version
+
+# tmux 3.7 has a crash bug in break-pane (fixed in 3.7a); tmux.conf works around it.
+check-tmux-version:
+    #!/usr/bin/env bash
+    set -euo pipefail
+    version=$(grep -oP '^tmux-\K.*' home-manager/package-versions.txt)
+    if [ "$version" != "3.7" ]; then
+        echo "WARNING: tmux version changed: 3.7 -> $version"
+        echo "         See home-manager/config/tmux/tmux.conf"
+    fi
 
 sync HOST=default_host:
     git fetch --all
-- 
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