diff --git a/aider/main.py b/aider/main.py
index 3cd00ecc9..4d13a0a1d 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -806,7 +806,7 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
                 " setting."
             )
             warned = True
-            
+
         if args.thinking_tokens is not None and (
             not main_model.accepts_settings or "thinking_tokens" not in main_model.accepts_settings
         ):
diff --git a/scripts/tmux_record.sh b/scripts/tmux_record.sh
index de40cca35..d3d5428fa 100755
--- a/scripts/tmux_record.sh
+++ b/scripts/tmux_record.sh
@@ -14,5 +14,5 @@ TMUX_SIZE=$(tmux display -p '#{window_width}x#{window_height}')
 echo "Using terminal size: $TMUX_SIZE"
 
 # Start asciinema recording with the tmux window size
-asciinema rec -c "tmux attach -t 0 -r" --headless --tty-size $TMUX_SIZE $*
+asciinema rec -c "tmux attach -t 0 -r" tmp.cast --headless --append --tty-size $TMUX_SIZE $*