[F] Fix auto tmux compatibility with ssh agent

config-sync/.config/tmux/tmux.conf

@@ -4,6 +4,7 @@ set-option -g history-limit 10000
 # set -g default-shell zsh
 set -g base-index 1
 set -g renumber-windows on
+set -g update-environment "DISPLAY SSH_ASKPASS SSH_AGENT_PID SSH_CONNECTION WINDOWID XAUTHORITY"
 
 # Status bar background style
 set -g status-style 'bg=#ffffff,fg=#333333'

config-sync/ssh-rc

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+# Keep a stable SSH agent socket path for tmux panes across reconnects.
+if [ -S "$SSH_AUTH_SOCK" ]; then
+    ln -sf "$SSH_AUTH_SOCK" "$HOME/.ssh/current_agent.sock"
+fi

scripts/includes/config-sync.sh

@@ -43,6 +43,8 @@ CFGSYNC="$SCR/../config-sync"
 
 # Sync SSH Config
 check-config $HOME/.ssh/config $CFGSYNC/ssh-config
+check-config $HOME/.ssh/rc $CFGSYNC/ssh-rc
+chmod +x $CFGSYNC/ssh-rc
 
 # Check nanorc includes
 # check-inject "$HOME/.nanorc" "include $SCR/../config-sync/nanorc"

scripts/zshrc.sh

@@ -183,6 +183,18 @@ elif has nano; then
     export EDITOR="nano"
 fi
 
+# Use the stable SSH agent socket maintained by ~/.ssh/rc inside SSH/tmux sessions.
+if [[ -n "$SSH_TTY" || -n "$SSH_CONNECTION" ]]; then
+    if [[ -n "$SSH_AUTH_SOCK" && "$SSH_AUTH_SOCK" != "$HOME/.ssh/current_agent.sock" && -S "$SSH_AUTH_SOCK" ]]; then
+        mkdir -p "$HOME/.ssh"
+        ln -sf "$SSH_AUTH_SOCK" "$HOME/.ssh/current_agent.sock"
+    fi
+
+    if [[ -S "$HOME/.ssh/current_agent.sock" ]]; then
+        export SSH_AUTH_SOCK="$HOME/.ssh/current_agent.sock"
+    fi
+fi
+
 # Gradle with auto environment detection
 if [[ -z $GRADLE ]] && command -v 'gradle' &> /dev/null; then
     GRADLE="$(which gradle)"