From cda0fe9f7ba3f6e66098f336276817d9c1104f60 Mon Sep 17 00:00:00 2001
From: Michael Grant <mgrant@grant.org>
Date: Mon, 7 Sep 2026 05:21:25 +0100
Subject: [PATCH] Act on previous cmd output when cursor on prompt at end of
 copy-buffer.

---
 regress/output-commands.sh | 7 +++++++
 window-copy.c              | 7 ++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/regress/output-commands.sh b/regress/output-commands.sh
index 2a0af404e..03ba9fee2 100644
--- a/regress/output-commands.sh
+++ b/regress/output-commands.sh
@@ -99,6 +99,13 @@ sleep 1
 $TMUX copy-output -t :empty || exit 1
 [ "$($TMUX show-buffer)" = one ] || exit 1
 
+$TMUX new-window -d -n prompt "printf '\\033]133;A\\007p\\$ \\033]133;B\\007echo\\033]133;C\\007one\\n\\033]133;D;0\\007\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -U -t :prompt || exit 1
+$TMUX send-keys -t :prompt.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :prompt.0 -X cancel || exit 1
+
 $TMUX copy-mode -t :plain || exit 1
 $TMUX send-keys -t :plain.0 -X copy-output -a || exit 1
 all=$($TMUX show-buffer)
diff --git a/window-copy.c b/window-copy.c
index 091314b4b..d2ea09396 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -4182,8 +4182,13 @@ window_copy_find_output_range(struct window_mode_entry *wme, u_int *sx,
 			break;
 		}
 	}
-	if (!found_start)
+	if (!found_start) {
+		/* At the live prompt, use the most recent command output. */
+		if (cursor_y == screen_hsize(data->source) + data->source->cy)
+			return (window_copy_find_previous_output_range(data->source,
+			    sx, sy, ex, ey));
 		return (0);
+	}
 	if (!found_end) {
 		if (y != total)
 			return (0);