Add pipe-selection copy mode command

Add OSC 133 copy mode output commands
Allow callers to override editor command
2026-09-19 19:38:09 +00:00 · 2026-09-14 06:25:40 +01:00 · 2026-09-14 05:35:34 +01:00 · 2026-09-14 05:35:00 +01:00
28 changed files with 675 additions and 1610 deletions
--- a/12
+++ b/12
@@ -111,18 +111,6 @@ CHANGES FROM 3.7c TO 3.8

 * Change show-options and show-hooks to use formats and add a -F flag to each.

-* Add support for the Kitty keyboard protocol. When extended-keys is on,
-  tmux uses it with terminals which support it, detected when a client
-  attaches or set with a new kittykeys terminal feature, and standard
-  extended keys or VT10x keys with other terminals, so terminals with
-  different capabilities may be attached at the same time. Programs inside
-  tmux may ask for either the Kitty protocol or modifyOtherKeys and get keys
-  in the form they asked for. The Kitty protocol can report the Super and
-  Hyper modifiers (key name prefixes s- and H-).
-
-* Add a client_key_mode format giving the extended key reporting mode in
-  use for a client, alongside the existing pane_key_mode for a pane.
-
 * Allow individual terminal features to be disabled by adding @ to their names
  in terminal-features, and add a utf8 feature for terminals which support
  UTF-8 output.
--- a/Makefile.am
+++ b/Makefile.am
@@ -171,7 +171,6 @@ dist_tmux_SOURCES = \
 	grid.c \
 	hooks.c \
 	hyperlinks.c \
-	input-kitty.c \
 	input-keys.c \
 	input.c \
 	job.c \
@@ -213,7 +212,6 @@ dist_tmux_SOURCES = \
 	tty-acs.c \
 	tty-draw.c \
 	tty-features.c \
-	tty-kitty.c \
 	tty-keys.c \
 	tty-term.c \
 	tty.c \
--- a/format.c
+++ b/format.c
@@ -1617,41 +1617,6 @@ format_cb_client_height(struct format_tree *ft)
 	return (NULL);
 }

-/* Callback for client_key_mode. */
-static void *
-format_cb_client_key_mode(struct format_tree *ft)
-{
-	struct client	*c = ft->c;
-	const char	*mode;
-	char		*s;
-	int		 kitty, eks;
-
-	if (c == NULL || (~c->tty.flags & TTY_STARTED))
-		return (NULL);
-
-	if (c->tty.flags & TTY_KKBPUSHED) {
-		xasprintf(&s, "Kitty %u", c->tty.kitty_keys);
-		return (s);
-	}
-
-	/* This mirrors the choice made in tty_update_features(). */
-	kitty = ((c->tty.term->flags & TERM_KITTYKEYS) != 0);
-	eks = (options_get_number(global_options, "extended-keys") != 0);
-	if (kitty)
-		eks = 0;
-	if (eks && tty_term_has(c->tty.term, TTYC_ENEKS))
-		mode = "Ext";
-	else
-		mode = "VT10x";
-
-	/* The terminal supports Kitty keys but they are not in use. */
-	if (kitty) {
-		xasprintf(&s, "%s (Kitty)", mode);
-		return (s);
-	}
-	return (xstrdup(mode));
-}
-
 /* Callback for client_key_table. */
 static void *
 format_cb_client_key_table(struct format_tree *ft)
@@ -2522,14 +2487,7 @@ format_cb_pane_unseen_changes(struct format_tree *ft)
 static void *
 format_cb_pane_key_mode(struct format_tree *ft)
 {
-	char	*s;
-
 	if (ft->wp != NULL && ft->wp->screen != NULL) {
-		if (ft->wp->screen->kitty_keys.flags != 0) {
-			xasprintf(&s, "Kitty %u",
-			    ft->wp->screen->kitty_keys.flags);
-			return (s);
-		}
 		switch (ft->wp->screen->mode & EXTENDED_KEY_MODES) {
 		case MODE_KEYS_EXTENDED:
 			return (xstrdup("Ext 1"));
@@ -3684,9 +3642,6 @@ static const struct format_table_entry format_table[] = {
 	{ "client_height", FORMAT_TABLE_STRING,
 	  format_cb_client_height
 	},
-	{ "client_key_mode", FORMAT_TABLE_STRING,
-	  format_cb_client_key_mode
-	},
 	{ "client_key_table", FORMAT_TABLE_STRING,
 	  format_cb_client_key_table
 	},
--- a/input-keys.c
+++ b/input-keys.c
@@ -464,8 +464,7 @@ input_key_extended(struct bufferevent *bev, key_code key)
 	} else
 		key &= KEYC_MASK_KEY;

-	if (options_get_number(global_options, "extended-keys-format") ==
-	    EXTENDED_KEYS_XTERM)
+	if (options_get_number(global_options, "extended-keys-format") == 1)
 		xsnprintf(tmp, sizeof tmp, "\033[27;%c;%llu~", modifier, key);
 	else
 		xsnprintf(tmp, sizeof tmp, "\033[%llu;%cu", key, modifier);
@@ -589,10 +588,6 @@ input_key(struct screen *s, struct bufferevent *bev, key_code key)
 		return (0);
 	}

-	/* Kitty keys take precedence if the application asked for them. */
-	if (input_key_kitty(s, bev, key) == 0)
-		return (0);
-
 	/* Is this backspace? */
 	if ((key & KEYC_MASK_KEY) == KEYC_BSPACE) {
 		newkey = options_get_number(global_options, "backspace");
@@ -682,10 +677,6 @@ input_key(struct screen *s, struct bufferevent *bev, key_code key)
 		log_debug("%s: ignoring key 0x%llx", __func__, key);
 		return (0);
 	}
-	if (key & (KEYC_SUPER|KEYC_HYPER))
-		return (input_key_vt10x(bev, key));
-	if (s->kitty_keys.flags & KITTY_KEY_SUPPORTED)
-		return (input_key_vt10x(bev, key));

 	/*
 	 * No builtin key sequence; construct an extended key sequence
--- a/input-kitty.c
+++ b/input-kitty.c
@@ -1,313 +0,0 @@
-/* $OpenBSD$ */
-
-/*
- * Copyright (c) 2026 Michael Grant <mgrant@grant.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
- * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <sys/types.h>
-
-#include <string.h>
-#include <wchar.h>
-
-#include "tmux.h"
-
-/* Track pane keyboard state and encode keys for applications. */
-
-struct input_kitty_key {
-	key_code	 key;
-	u_int		 number;
-	char		 final;
-};
-
-static const struct input_kitty_key input_kitty_keys[] = {
-	{ C0_ESC, 27, 'u' },
-	{ C0_CR, 13, 'u' },
-	{ C0_HT, 9, 'u' },
-	{ KEYC_BSPACE, 127, 'u' },
-	{ KEYC_IC, 2, '~' },
-	{ KEYC_DC, 3, '~' },
-	{ KEYC_LEFT, 1, 'D' },
-	{ KEYC_RIGHT, 1, 'C' },
-	{ KEYC_UP, 1, 'A' },
-	{ KEYC_DOWN, 1, 'B' },
-	{ KEYC_PPAGE, 5, '~' },
-	{ KEYC_NPAGE, 6, '~' },
-	{ KEYC_HOME, 1, 'H' },
-	{ KEYC_END, 1, 'F' },
-	{ KEYC_F1, 1, 'P' },
-	{ KEYC_F2, 1, 'Q' },
-	{ KEYC_F3, 13, '~' },
-	{ KEYC_F4, 1, 'S' },
-	{ KEYC_F5, 15, '~' },
-	{ KEYC_F6, 17, '~' },
-	{ KEYC_F7, 18, '~' },
-	{ KEYC_F8, 19, '~' },
-	{ KEYC_F9, 20, '~' },
-	{ KEYC_F10, 21, '~' },
-	{ KEYC_F11, 23, '~' },
-	{ KEYC_F12, 24, '~' },
-	{ KEYC_CAPSLOCK, 57358, 'u' },
-	{ KEYC_SCROLLLOCK, 57359, 'u' },
-	{ KEYC_NUMLOCK, 57360, 'u' },
-	{ KEYC_PRINTSCREEN, 57361, 'u' },
-	{ KEYC_PAUSE, 57362, 'u' },
-	{ KEYC_MENU, 57363, 'u' },
-	{ KEYC_F13, 57376, 'u' },
-	{ KEYC_F14, 57377, 'u' },
-	{ KEYC_F15, 57378, 'u' },
-	{ KEYC_F16, 57379, 'u' },
-	{ KEYC_F17, 57380, 'u' },
-	{ KEYC_F18, 57381, 'u' },
-	{ KEYC_F19, 57382, 'u' },
-	{ KEYC_F20, 57383, 'u' },
-	{ KEYC_F21, 57384, 'u' },
-	{ KEYC_F22, 57385, 'u' },
-	{ KEYC_F23, 57386, 'u' },
-	{ KEYC_F24, 57387, 'u' },
-	{ KEYC_F25, 57388, 'u' },
-	{ KEYC_F26, 57389, 'u' },
-	{ KEYC_F27, 57390, 'u' },
-	{ KEYC_F28, 57391, 'u' },
-	{ KEYC_F29, 57392, 'u' },
-	{ KEYC_F30, 57393, 'u' },
-	{ KEYC_F31, 57394, 'u' },
-	{ KEYC_F32, 57395, 'u' },
-	{ KEYC_F33, 57396, 'u' },
-	{ KEYC_F34, 57397, 'u' },
-	{ KEYC_F35, 57398, 'u' },
-	{ KEYC_KP_ZERO|KEYC_KEYPAD, 57399, 'u' },
-	{ KEYC_KP_ONE|KEYC_KEYPAD, 57400, 'u' },
-	{ KEYC_KP_TWO|KEYC_KEYPAD, 57401, 'u' },
-	{ KEYC_KP_THREE|KEYC_KEYPAD, 57402, 'u' },
-	{ KEYC_KP_FOUR|KEYC_KEYPAD, 57403, 'u' },
-	{ KEYC_KP_FIVE|KEYC_KEYPAD, 57404, 'u' },
-	{ KEYC_KP_SIX|KEYC_KEYPAD, 57405, 'u' },
-	{ KEYC_KP_SEVEN|KEYC_KEYPAD, 57406, 'u' },
-	{ KEYC_KP_EIGHT|KEYC_KEYPAD, 57407, 'u' },
-	{ KEYC_KP_NINE|KEYC_KEYPAD, 57408, 'u' },
-	{ KEYC_KP_PERIOD|KEYC_KEYPAD, 57409, 'u' },
-	{ KEYC_KP_SLASH|KEYC_KEYPAD, 57410, 'u' },
-	{ KEYC_KP_STAR|KEYC_KEYPAD, 57411, 'u' },
-	{ KEYC_KP_MINUS|KEYC_KEYPAD, 57412, 'u' },
-	{ KEYC_KP_PLUS|KEYC_KEYPAD, 57413, 'u' },
-	{ KEYC_KP_ENTER|KEYC_KEYPAD, 57414, 'u' },
-	{ KEYC_KP_EQUAL|KEYC_KEYPAD, 57415, 'u' },
-	{ KEYC_KP_SEPARATOR|KEYC_KEYPAD, 57416, 'u' },
-	{ KEYC_KP_LEFT|KEYC_KEYPAD, 57417, 'u' },
-	{ KEYC_KP_RIGHT|KEYC_KEYPAD, 57418, 'u' },
-	{ KEYC_KP_UP|KEYC_KEYPAD, 57419, 'u' },
-	{ KEYC_KP_DOWN|KEYC_KEYPAD, 57420, 'u' },
-	{ KEYC_KP_PPAGE|KEYC_KEYPAD, 57421, 'u' },
-	{ KEYC_KP_NPAGE|KEYC_KEYPAD, 57422, 'u' },
-	{ KEYC_KP_HOME|KEYC_KEYPAD, 57423, 'u' },
-	{ KEYC_KP_END|KEYC_KEYPAD, 57424, 'u' },
-	{ KEYC_KP_IC|KEYC_KEYPAD, 57425, 'u' },
-	{ KEYC_KP_DC|KEYC_KEYPAD, 57426, 'u' },
-	{ KEYC_KP_BEGIN|KEYC_KEYPAD, 57427, '~' },
-	{ KEYC_MEDIA_PLAY, 57428, 'u' },
-	{ KEYC_MEDIA_PAUSE, 57429, 'u' },
-	{ KEYC_MEDIA_PLAYPAUSE, 57430, 'u' },
-	{ KEYC_MEDIA_REVERSE, 57431, 'u' },
-	{ KEYC_MEDIA_STOP, 57432, 'u' },
-	{ KEYC_MEDIA_FASTFORWARD, 57433, 'u' },
-	{ KEYC_MEDIA_REWIND, 57434, 'u' },
-	{ KEYC_MEDIA_NEXT, 57435, 'u' },
-	{ KEYC_MEDIA_PREVIOUS, 57436, 'u' },
-	{ KEYC_MEDIA_RECORD, 57437, 'u' },
-	{ KEYC_VOLUME_DOWN, 57438, 'u' },
-	{ KEYC_VOLUME_UP, 57439, 'u' },
-	{ KEYC_VOLUME_MUTE, 57440, 'u' },
-	{ KEYC_LEFT_SHIFT, 57441, 'u' },
-	{ KEYC_LEFT_CTRL, 57442, 'u' },
-	{ KEYC_LEFT_ALT, 57443, 'u' },
-	{ KEYC_LEFT_SUPER, 57444, 'u' },
-	{ KEYC_LEFT_HYPER, 57445, 'u' },
-	{ KEYC_LEFT_META, 57446, 'u' },
-	{ KEYC_RIGHT_SHIFT, 57447, 'u' },
-	{ KEYC_RIGHT_CTRL, 57448, 'u' },
-	{ KEYC_RIGHT_ALT, 57449, 'u' },
-	{ KEYC_RIGHT_SUPER, 57450, 'u' },
-	{ KEYC_RIGHT_HYPER, 57451, 'u' },
-	{ KEYC_RIGHT_META, 57452, 'u' },
-	{ KEYC_ISO_LEVEL3_SHIFT, 57453, 'u' },
-	{ KEYC_ISO_LEVEL5_SHIFT, 57454, 'u' }
-};
-
-void
-input_kitty_reset(struct screen *s)
-{
-	memset(&s->kitty_keys, 0, sizeof s->kitty_keys);
-}
-
-void
-input_kitty_alternate_on(struct screen *s)
-{
-	s->saved_kitty_keys = s->kitty_keys;
-	input_kitty_reset(s);
-}
-
-void
-input_kitty_alternate_off(struct screen *s)
-{
-	s->kitty_keys = s->saved_kitty_keys;
-	memset(&s->saved_kitty_keys, 0, sizeof s->saved_kitty_keys);
-}
-
-void
-input_kitty_set(struct screen *s, u_int flags, int mode)
-{
-	flags &= KITTY_KEY_SUPPORTED;
-	if (mode == 2)
-		s->kitty_keys.flags |= flags;
-	else if (mode == 3)
-		s->kitty_keys.flags &= ~flags;
-	else
-		s->kitty_keys.flags = flags;
-}
-
-void
-input_kitty_push(struct screen *s, u_int flags)
-{
-	s->kitty_keys.saved_flags = s->kitty_keys.flags;
-	s->kitty_keys.have_saved = 1;
-	s->kitty_keys.flags = flags & KITTY_KEY_SUPPORTED;
-}
-
-void
-input_kitty_pop(struct screen *s, u_int count)
-{
-	if (count == 0)
-		return;
-	if (s->kitty_keys.have_saved && count == 1)
-		s->kitty_keys.flags = s->kitty_keys.saved_flags;
-	else
-		s->kitty_keys.flags = 0;
-	s->kitty_keys.have_saved = 0;
-}
-
-static u_int
-input_kitty_modifiers(key_code key)
-{
-	u_int	modifiers = 1;
-
-	if (key & KEYC_SHIFT)
-		modifiers += 1;
-	if (key & KEYC_META)
-		modifiers += 2;
-	if (key & KEYC_CTRL)
-		modifiers += 4;
-	if (key & KEYC_SUPER)
-		modifiers += 8;
-	if (key & KEYC_HYPER)
-		modifiers += 16;
-	return (modifiers);
-}
-
-static const struct input_kitty_key *
-input_kitty_lookup(key_code key)
-{
-	key_code	lookup;
-	u_int		i;
-
-	lookup = key & (KEYC_MASK_KEY|KEYC_KEYPAD);
-	for (i = 0; i < nitems(input_kitty_keys); i++) {
-		if (input_kitty_keys[i].key == lookup)
-			return (&input_kitty_keys[i]);
-	}
-	return (NULL);
-}
-
-int
-input_key_kitty(struct screen *s, struct bufferevent *bev, key_code key)
-{
-	const struct input_kitty_key	*ikk;
-	struct utf8_data			 ud;
-	wchar_t				 wc;
-	key_code			 modifiers, onlykey;
-	u_int				 flags, number, modifier;
-	char				 tmp[64];
-	size_t				 size;
-
-	flags = s->kitty_keys.flags & KITTY_KEY_SUPPORTED;
-	if (flags == 0)
-		return (-1);
-	if ((key & KEYC_MASK_KEY) == KEYC_BTAB)
-		key = C0_HT|(key & ~KEYC_MASK_KEY)|KEYC_SHIFT;
-
-	modifiers = key & (KEYC_SHIFT|KEYC_META|KEYC_CTRL|KEYC_SUPER|KEYC_HYPER);
-	ikk = input_kitty_lookup(key);
-	if (ikk != NULL) {
-		if ((flags & KITTY_KEY_REPORT_ALL) == 0) {
-			if (ikk->key == C0_CR || ikk->key == C0_HT ||
-			    ikk->key == KEYC_BSPACE)
-				return (-1);
-			if (ikk->final != 'u' &&
-			    (modifiers & (KEYC_SUPER|KEYC_HYPER)) == 0)
-				return (-1);
-		}
-		number = ikk->number;
-		modifier = input_kitty_modifiers(key);
-		if (ikk->final == 'u') {
-			if (modifier == 1)
-				size = xsnprintf(tmp, sizeof tmp, "\033[%uu", number);
-			else
-				size = xsnprintf(tmp, sizeof tmp, "\033[%u;%uu",
-				    number, modifier);
-		} else if (ikk->final == '~') {
-			if (modifier == 1)
-				size = xsnprintf(tmp, sizeof tmp, "\033[%u~", number);
-			else
-				size = xsnprintf(tmp, sizeof tmp, "\033[%u;%u~",
-				    number, modifier);
-		} else {
-			if (modifier == 1)
-				size = xsnprintf(tmp, sizeof tmp, "\033[%c",
-				    ikk->final);
-			else
-				size = xsnprintf(tmp, sizeof tmp, "\033[1;%u%c",
-				    modifier, ikk->final);
-		}
-		goto write;
-	}
-
-	if ((flags & KITTY_KEY_REPORT_ALL) == 0 &&
-	    (modifiers & (KEYC_META|KEYC_CTRL|KEYC_SUPER|KEYC_HYPER)) == 0)
-		return (-1);
-
-	onlykey = key & KEYC_MASK_KEY;
-	if (KEYC_IS_UNICODE(key)) {
-		utf8_to_data(onlykey, &ud);
-		if (utf8_towc(&ud, &wc) != UTF8_DONE)
-			return (-1);
-		number = wc;
-	} else if (onlykey <= 0x7f)
-		number = onlykey;
-	else
-		return (-1);
-	if ((key & KEYC_SHIFT) && number >= 'A' && number <= 'Z')
-		number += 'a' - 'A';
-
-	modifier = input_kitty_modifiers(key);
-	if (modifier == 1)
-		size = xsnprintf(tmp, sizeof tmp, "\033[%uu", number);
-	else
-		size = xsnprintf(tmp, sizeof tmp, "\033[%u;%uu", number,
-		    modifier);
-
-write:
-	log_debug("%s: %.*s", __func__, (int)size, tmp);
-	bufferevent_write(bev, tmp, size);
-	return (0);
-}
--- a/input.c
+++ b/input.c
@@ -279,10 +279,6 @@ enum input_csi_type {
 	INPUT_CSI_HPA,
 	INPUT_CSI_ICH,
 	INPUT_CSI_IL,
-	INPUT_CSI_KITTY_POP,
-	INPUT_CSI_KITTY_PUSH,
-	INPUT_CSI_KITTY_QUERY,
-	INPUT_CSI_KITTY_SET,
 	INPUT_CSI_MODOFF,
 	INPUT_CSI_MODSET,
 	INPUT_CSI_QUERY,
@@ -348,11 +344,7 @@ static const struct input_table_entry input_csi_table[] = {
 	{ 'r', "",  INPUT_CSI_DECSTBM },
 	{ 's', "",  INPUT_CSI_SCP },
 	{ 't', "",  INPUT_CSI_WINOPS },
-	{ 'u', "",  INPUT_CSI_RCP },
-	{ 'u', "<", INPUT_CSI_KITTY_POP },
-	{ 'u', "=", INPUT_CSI_KITTY_SET },
-	{ 'u', ">", INPUT_CSI_KITTY_PUSH },
-	{ 'u', "?", INPUT_CSI_KITTY_QUERY }
+	{ 'u', "",  INPUT_CSI_RCP }
 };

 /* Input transition. */
@@ -1565,33 +1557,6 @@ input_csi_dispatch(struct input_ctx *ictx)
 		if (options_get_number(global_options, "extended-keys") == 2)
 			screen_write_mode_set(sctx, MODE_KEYS_EXTENDED);
 		break;
-	case INPUT_CSI_KITTY_QUERY:
-		if (options_get_number(global_options, "extended-keys") == 0)
-			break;
-		input_reply(ictx, 1, "\033[?%uu", s->kitty_keys.flags);
-		break;
-	case INPUT_CSI_KITTY_SET:
-		if (options_get_number(global_options, "extended-keys") == 0)
-			break;
-		n = input_get(ictx, 0, 0, 0);
-		m = input_get(ictx, 1, 1, 1);
-		if (n >= 0 && m >= 1 && m <= 3)
-			input_kitty_set(s, n, m);
-		break;
-	case INPUT_CSI_KITTY_PUSH:
-		if (options_get_number(global_options, "extended-keys") == 0)
-			break;
-		n = input_get(ictx, 0, 0, 0);
-		if (n >= 0)
-			input_kitty_push(s, n);
-		break;
-	case INPUT_CSI_KITTY_POP:
-		if (options_get_number(global_options, "extended-keys") == 0)
-			break;
-		n = input_get(ictx, 0, 1, 1);
-		if (n >= 0)
-			input_kitty_pop(s, n);
-		break;
 	case INPUT_CSI_WINOPS:
 		input_csi_dispatch_winops(ictx);
 		break;
--- a/key-bindings.c
+++ b/key-bindings.c
@@ -53,6 +53,7 @@
 	" '#{?#{m/r:(copy|view)-mode,#{pane_mode}},Go To Bottom,}' '>' {send -X history-bottom}" \
 	" ''" \
 	" '#{?#{==:#{pane_mode},copy-mode},#{?copy_line_numbers,Hide Line Numbers,Show Line Numbers},}' 'L' {send -X line-numbers-toggle}" \
+	" '#{?#{==:#{pane_mode},copy-mode},Edit,}' 'e' {if -F '#{selection_present}' {send -X open-selection} {send -X open-output}}" \
 	" '#{?#{==:#{pane_mode},copy-mode},#{?refresh_active,Refresh Off,Refresh On},}' 'r' {send -X refresh-toggle}" \
 	" ''" \
 	" '#{?#{&&:#{buffer_size},#{!:#{pane_in_mode}}},Paste #[underscore]#{=/9/...:buffer_sample},}' 'p' {paste-buffer}" \
@@ -575,6 +576,7 @@ key_bindings_init(void)
 		"bind -Tcopy-mode C-l { send -X recentre-top-bottom }",
 		"bind -Tcopy-mode M-l { send -X cursor-centre-horizontal }",
 		"bind -Tcopy-mode C-n { send -X cursor-down }",
+		"bind -Tcopy-mode C-o { send -X select-output }",
 		"bind -Tcopy-mode C-p { send -X cursor-up }",
 		"bind -Tcopy-mode C-r { command-prompt -P -T search -ip'(search up)' -I'#{pane_search_string}' { send -X search-backward-incremental -- '%%' } }",
 		"bind -Tcopy-mode C-s { command-prompt -P -T search -ip'(search down)' -I'#{pane_search_string}' { send -X search-forward-incremental -- '%%' } }",
@@ -592,6 +594,7 @@ key_bindings_init(void)
 		"bind -Tcopy-mode R { send -X rectangle-toggle }",
 		"bind -Tcopy-mode T { command-prompt -P -1p'(jump to backward)' { send -X jump-to-backward -- '%%' } }",
 		"bind -Tcopy-mode X { send -X set-mark }",
+		"bind -Tcopy-mode e { if -F '#{selection_present}' { send -X open-selection } { send -X open-output } }",
 		"bind -Tcopy-mode f { command-prompt -P -1p'(jump forward)' { send -X jump-forward -- '%%' } }",
 		"bind -Tcopy-mode g { command-prompt -P -p'(goto line)' { send -X goto-line -- '%%' } }",
 		"bind -Tcopy-mode n { send -X search-again }",
@@ -687,6 +690,8 @@ key_bindings_init(void)
 		"bind -Tcopy-mode-vi K { send -X scroll-up }",
 		"bind -Tcopy-mode-vi L { send -X bottom-line }",
 		"bind -Tcopy-mode-vi M { send -X middle-line }",
+		"bind -Tcopy-mode-vi M-e { if -F '#{selection_present}' { send -X open-selection } { send -X open-output } }",
+		"bind -Tcopy-mode-vi M-o { send -X select-output }",
 		"bind -Tcopy-mode-vi N { send -X search-reverse }",
 		"bind -Tcopy-mode-vi P { send -X toggle-position }",
 		"bind -Tcopy-mode-vi T { command-prompt -P -1p'(jump to backward)' { send -X jump-to-backward -- '%%' } }",
--- a/key-string.c
+++ b/key-string.c
@@ -45,29 +45,6 @@ static const struct {
 	{ "F10",	KEYC_F10|KEYC_IMPLIED_META },
 	{ "F11",	KEYC_F11|KEYC_IMPLIED_META },
 	{ "F12",	KEYC_F12|KEYC_IMPLIED_META },
-	{ "F13",	KEYC_F13|KEYC_IMPLIED_META },
-	{ "F14",	KEYC_F14|KEYC_IMPLIED_META },
-	{ "F15",	KEYC_F15|KEYC_IMPLIED_META },
-	{ "F16",	KEYC_F16|KEYC_IMPLIED_META },
-	{ "F17",	KEYC_F17|KEYC_IMPLIED_META },
-	{ "F18",	KEYC_F18|KEYC_IMPLIED_META },
-	{ "F19",	KEYC_F19|KEYC_IMPLIED_META },
-	{ "F20",	KEYC_F20|KEYC_IMPLIED_META },
-	{ "F21",	KEYC_F21|KEYC_IMPLIED_META },
-	{ "F22",	KEYC_F22|KEYC_IMPLIED_META },
-	{ "F23",	KEYC_F23|KEYC_IMPLIED_META },
-	{ "F24",	KEYC_F24|KEYC_IMPLIED_META },
-	{ "F25",	KEYC_F25|KEYC_IMPLIED_META },
-	{ "F26",	KEYC_F26|KEYC_IMPLIED_META },
-	{ "F27",	KEYC_F27|KEYC_IMPLIED_META },
-	{ "F28",	KEYC_F28|KEYC_IMPLIED_META },
-	{ "F29",	KEYC_F29|KEYC_IMPLIED_META },
-	{ "F30",	KEYC_F30|KEYC_IMPLIED_META },
-	{ "F31",	KEYC_F31|KEYC_IMPLIED_META },
-	{ "F32",	KEYC_F32|KEYC_IMPLIED_META },
-	{ "F33",	KEYC_F33|KEYC_IMPLIED_META },
-	{ "F34",	KEYC_F34|KEYC_IMPLIED_META },
-	{ "F35",	KEYC_F35|KEYC_IMPLIED_META },
 	{ "IC",		KEYC_IC|KEYC_IMPLIED_META },
 	{ "Insert",	KEYC_IC|KEYC_IMPLIED_META },
 	{ "DC",		KEYC_DC|KEYC_IMPLIED_META },
@@ -145,54 +122,6 @@ static const struct {
 	{ "KPEnter",	KEYC_KP_ENTER|KEYC_KEYPAD },
 	{ "KP0",	KEYC_KP_ZERO|KEYC_KEYPAD },
 	{ "KP.",	KEYC_KP_PERIOD|KEYC_KEYPAD },
-	{ "KP=",	KEYC_KP_EQUAL|KEYC_KEYPAD },
-	{ "KP,",	KEYC_KP_SEPARATOR|KEYC_KEYPAD },
-	{ "KPLeft",	KEYC_KP_LEFT|KEYC_KEYPAD },
-	{ "KPRight",	KEYC_KP_RIGHT|KEYC_KEYPAD },
-	{ "KPUp",	KEYC_KP_UP|KEYC_KEYPAD },
-	{ "KPDown",	KEYC_KP_DOWN|KEYC_KEYPAD },
-	{ "KPPageUp",	KEYC_KP_PPAGE|KEYC_KEYPAD },
-	{ "KPPageDown",	KEYC_KP_NPAGE|KEYC_KEYPAD },
-	{ "KPHome",	KEYC_KP_HOME|KEYC_KEYPAD },
-	{ "KPEnd",	KEYC_KP_END|KEYC_KEYPAD },
-	{ "KPInsert",	KEYC_KP_IC|KEYC_KEYPAD },
-	{ "KPDelete",	KEYC_KP_DC|KEYC_KEYPAD },
-	{ "KPBegin",	KEYC_KP_BEGIN|KEYC_KEYPAD },
-
-	/* Other function keys. */
-	{ "CapsLock",	KEYC_CAPSLOCK },
-	{ "ScrollLock",	KEYC_SCROLLLOCK },
-	{ "NumLock",	KEYC_NUMLOCK },
-	{ "PrintScreen", KEYC_PRINTSCREEN },
-	{ "Pause",	KEYC_PAUSE },
-	{ "Menu",	KEYC_MENU },
-	{ "MediaPlay",	KEYC_MEDIA_PLAY },
-	{ "MediaPause", KEYC_MEDIA_PAUSE },
-	{ "MediaPlayPause", KEYC_MEDIA_PLAYPAUSE },
-	{ "MediaReverse", KEYC_MEDIA_REVERSE },
-	{ "MediaStop",	KEYC_MEDIA_STOP },
-	{ "MediaFastForward", KEYC_MEDIA_FASTFORWARD },
-	{ "MediaRewind", KEYC_MEDIA_REWIND },
-	{ "MediaNext",	KEYC_MEDIA_NEXT },
-	{ "MediaPrevious", KEYC_MEDIA_PREVIOUS },
-	{ "MediaRecord", KEYC_MEDIA_RECORD },
-	{ "VolumeDown", KEYC_VOLUME_DOWN },
-	{ "VolumeUp",	KEYC_VOLUME_UP },
-	{ "VolumeMute", KEYC_VOLUME_MUTE },
-	{ "LeftShift",	KEYC_LEFT_SHIFT },
-	{ "LeftControl", KEYC_LEFT_CTRL },
-	{ "LeftAlt",	KEYC_LEFT_ALT },
-	{ "LeftSuper",	KEYC_LEFT_SUPER },
-	{ "LeftHyper",	KEYC_LEFT_HYPER },
-	{ "LeftMeta",	KEYC_LEFT_META },
-	{ "RightShift", KEYC_RIGHT_SHIFT },
-	{ "RightControl", KEYC_RIGHT_CTRL },
-	{ "RightAlt",	KEYC_RIGHT_ALT },
-	{ "RightSuper", KEYC_RIGHT_SUPER },
-	{ "RightHyper", KEYC_RIGHT_HYPER },
-	{ "RightMeta",	KEYC_RIGHT_META },
-	{ "ISOLevel3Shift", KEYC_ISO_LEVEL3_SHIFT },
-	{ "ISOLevel5Shift", KEYC_ISO_LEVEL5_SHIFT },

 	/* Mouse keys. */
 	KEYC_MOUSE_STRING(MOUSEDOWN1, MouseDown1),
@@ -297,13 +226,8 @@ key_string_get_modifiers(const char **string)
 			modifiers |= KEYC_META;
 			break;
 		case 'S':
-			modifiers |= KEYC_SHIFT;
-			break;
 		case 's':
-			modifiers |= KEYC_SUPER;
-			break;
-		case 'H':
-			modifiers |= KEYC_HYPER;
+			modifiers |= KEYC_SHIFT;
 			break;
 		default:
 			*string = NULL;
@@ -425,10 +349,6 @@ key_string_lookup_key(key_code key, int with_flags)
 		strlcat(out, "M-", sizeof out);
 	if (key & KEYC_SHIFT)
 		strlcat(out, "S-", sizeof out);
-	if (key & KEYC_SUPER)
-		strlcat(out, "s-", sizeof out);
-	if (key & KEYC_HYPER)
-		strlcat(out, "H-", sizeof out);
 	key &= KEYC_MASK_KEY;

 	/* Handle no key. */
--- a/options-table.c
+++ b/options-table.c
@@ -104,7 +104,7 @@ static const char *options_table_extended_keys_list[] = {
 	"off", "on", "always", NULL
 };
 static const char *options_table_extended_keys_format_list[] = {
-	"csi-u", "xterm", "kitty", NULL
+	"csi-u", "xterm", NULL
 };
 static const char *options_table_allow_passthrough_list[] = {
 	"off", "on", "all", NULL
--- a/options.c
+++ b/options.c
@@ -1400,12 +1400,6 @@ options_push_changes(const char *name)
 		TAILQ_FOREACH(loop, &clients, entry)
 			server_client_set_key_table(loop, NULL);
 	}
-	if (strcmp(name, "extended-keys") == 0) {
-		TAILQ_FOREACH(loop, &clients, entry) {
-			if (loop->tty.flags & TTY_STARTED)
-				tty_update_features(&loop->tty);
-		}
-	}
 	if (strcmp(name, "user-keys") == 0) {
 		TAILQ_FOREACH(loop, &clients, entry) {
 			if (loop->tty.flags & TTY_OPENED)
--- a/regress/kitty-keys-clients.sh
+++ b/regress/kitty-keys-clients.sh
@@ -1,146 +0,0 @@
-#!/bin/sh
-
-# Test per-client keyboard protocol detection and pane-side encoding.
-
-PATH=/bin:/usr/bin
-TERM=screen
-
-[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-KCONF=$(mktemp)
-LCONF=$(mktemp)
-OUT=$(mktemp)
-TMP=$(mktemp)
-SOCKETS="testKmc$$ testKka$$ testKua$$ testKrt$$ testKru$$ testKlq$$ testKlu$$"
-
-printf '%s\n' 'set -g extended-keys on' >"$KCONF"
-printf '%s\n' 'set -g extended-keys off' >"$LCONF"
-
-cleanup()
-{
-	rm -f "$KCONF" "$LCONF" "$OUT" "$TMP"
-	for socket in $SOCKETS; do
-		$TEST_TMUX -L"$socket" kill-server 2>/dev/null
-	done
-}
-trap cleanup 0 1 15
-
-wait_for_mode()
-{
-	tmux=$1
-	wanted=$2
-	i=0
-	while [ "$($tmux display-message -pt: '#{pane_key_mode}')" != "$wanted" ] &&
-	    [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ "$($tmux display-message -pt: '#{pane_key_mode}')" = "$wanted" ]
-}
-
-wait_for_output()
-{
-	i=0
-	while [ ! -s "$1" ] && [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ -s "$1" ]
-}
-
-client_mode()
-{
-	tmux=$1
-	session=$2
-
-	if [ -z "$session" ]; then
-		$tmux list-clients -F '#{client_key_mode}'
-	else
-		$tmux list-clients -F '#{client_session}:#{client_key_mode}' |
-		    sed -n "s/^$session://p"
-	fi
-}
-
-wait_for_client_mode()
-{
-	tmux=$1
-	session=$2
-	wanted=$3
-	i=0
-	while [ "$(client_mode "$tmux" "$session")" != "$wanted" ] &&
-	    [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ "$(client_mode "$tmux" "$session")" = "$wanted" ]
-}
-
-# Each client must be negotiated independently. A tmux with extended-keys off
-# stands in for a terminal without Kitty keys, since it does not answer the
-# query.
-M="$TEST_TMUX -LtestKmc$$ -f$KCONF"
-KA="$TEST_TMUX -LtestKka$$ -f$KCONF"
-UA="$TEST_TMUX -LtestKua$$ -f$LCONF"
-$M new-session -d -x80 -y24 -s kitty || exit 1
-$M new-session -d -x80 -y24 -s csiu || exit 1
-$KA new-session -d -x80 -y24 "$M attach-session -t kitty" || exit 1
-$UA new-session -d -x80 -y24 "$M attach-session -t csiu" || exit 1
-wait_for_mode "$KA" 'Kitty 1' || exit 1
-
-# Each client must report the protocol its own terminal negotiated.
-wait_for_client_mode "$M" kitty 'Kitty 1' || exit 1
-wait_for_client_mode "$M" csiu 'Ext' || exit 1
-
-uc=$($M list-clients -F '#{client_name} #{client_session}' |
-    awk '$2 == "csiu" { print $1 }')
-[ -n "$uc" ] || exit 1
-$M command-prompt -t"$uc" -k 'display-message -pl "%%"' >"$TMP" &
-pid=$!
-sleep 0.2
-$UA send-keys Escape '[97;5u'
-wait "$pid"
-[ "$(tr -d '[:space:]' <"$TMP")" = 'C-a' ] || exit 1
-
-# A Kitty-capable terminal must still be reported when it is not in use.
-$M set-option -g extended-keys off
-wait_for_client_mode "$M" kitty 'VT10x (Kitty)' || exit 1
-wait_for_client_mode "$M" csiu 'VT10x' || exit 1
-$M set-option -g extended-keys on
-wait_for_client_mode "$M" kitty 'Kitty 1' || exit 1
-
-$KA kill-server 2>/dev/null
-$UA kill-server 2>/dev/null
-$M kill-server 2>/dev/null
-
-# Standard extended input must be translated for a Kitty-requesting pane.
-: >"$OUT"
-R="$TEST_TMUX -LtestKrt$$ -f$KCONF"
-RU="$TEST_TMUX -LtestKru$$ -f$LCONF"
-$R new-session -d -x80 -y24 \
-    "stty raw -echo; printf '\033[>1u'; dd bs=1 count=7 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5" || exit 1
-$RU new-session -d -x80 -y24 "$R attach-session" || exit 1
-wait_for_client_mode "$R" '' 'Ext' || exit 1
-$RU send-keys C-a
-wait_for_output "$OUT" || exit 1
-[ "$(tr -d ' \n' <"$OUT")" = '1b5b39373b3575' ] || exit 1
-$RU kill-server 2>/dev/null
-$R kill-server 2>/dev/null
-
-# An application is told the Kitty flags it asked for even when a client that
-# only supports VT10x is attached, and keys from that client are encoded as it
-# asked.
-: >"$OUT"
-: >"$TMP"
-printf '%s\n' "set -as terminal-overrides ',*:Eneks@:Dseks@'" >>"$KCONF"
-LQ="$TEST_TMUX -LtestKlq$$ -f$KCONF"
-LU="$TEST_TMUX -LtestKlu$$ -f$LCONF"
-$LQ new-session -d -x80 -y24 \
-    "stty raw -echo; sleep 2; printf '\033[>1u\033[?u'; dd bs=1 count=5 2>/dev/null | od -An -v -t x1 >'$OUT'; dd bs=1 count=7 2>/dev/null | od -An -v -t x1 >'$TMP'; sleep 5" || exit 1
-$LU new-session -d -x80 -y24 "$LQ attach-session" || exit 1
-wait_for_output "$OUT" || exit 1
-[ "$(tr -d ' \n' <"$OUT")" = '1b5b3f3175' ] || exit 1
-wait_for_client_mode "$LQ" '' 'VT10x' || exit 1
-$LU send-keys C-a
-wait_for_output "$TMP" || exit 1
-[ "$(tr -d ' \n' <"$TMP")" = '1b5b39373b3575' ] || exit 1
-
-exit 0
--- a/regress/kitty-keys-input.sh
+++ b/regress/kitty-keys-input.sh
@@ -1,116 +0,0 @@
-#!/bin/sh
-
-# Test client-side Kitty keyboard protocol support: an outer tmux acts as a
-# Kitty-capable terminal for the inner tmux which is the one under test. The
-# inner tmux queries the outer one, the outer one replies, and the inner one
-# then parses the key sequences sent to it.
-
-PATH=/bin:/usr/bin
-TERM=screen
-
-[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-CONF=$(mktemp)
-TMP=$(mktemp)
-
-printf '%s\n' 'set -g extended-keys on' >"$CONF"
-
-TMUX="$TEST_TMUX -LtestKIA$$ -f$CONF"
-TMUX2="$TEST_TMUX -LtestKIB$$ -f$CONF"
-
-trap 'rm -f "$CONF" "$TMP"; $TMUX kill-server 2>/dev/null; \
-    $TMUX2 kill-server 2>/dev/null' 0 1 15
-
-$TMUX2 new-session -d -x80 -y24 || exit 1
-$TMUX new-session -d -x80 -y24 "$TMUX2 attach" || exit 1
-
-exit_status=0
-
-wait_for_mode()
-{
-	i=0
-	while [ "$($TMUX display-message -pt: '#{pane_key_mode}')" != "$1" ] &&
-	    [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ "$($TMUX display-message -pt: '#{pane_key_mode}')" = "$1" ]
-}
-
-assert_key()
-{
-	keys=$1
-	expected=$2
-
-	$TMUX2 command-prompt -k 'display-message -pl "%%"' >"$TMP" &
-	sleep 0.15
-	# Send raw bytes so the outer tmux does not encode them itself.
-	raw=$(printf '%s' "$keys" | sed -e 's/Escape /\\033/g' -e 's/ //g')
-	$TMUX send-keys -H $(printf "$raw" | od -An -v -t x1)
-	wait
-
-	actual=$(tr -d '[:space:]' <"$TMP")
-	if [ "$actual" = "$expected" ]; then
-		[ -n "$VERBOSE" ] && echo "[PASS] $keys -> $actual"
-	else
-		echo "[FAIL] $keys -> $expected (got '$actual')"
-		exit_status=1
-	fi
-}
-
-# The inner tmux must detect the outer one and push its flags.
-if ! wait_for_mode 'Kitty 1'; then
-	echo "[FAIL] inner tmux did not enable the Kitty protocol"
-	exit 1
-fi
-
-# Modifiers, including the Kitty-only Super and Hyper.
-assert_key 'Escape [97;2u' 'S-a'
-assert_key 'Escape [97;3u' 'M-a'
-assert_key 'Escape [97;5u' 'C-a'
-assert_key 'Escape [97;6u' 'C-S-a'
-assert_key 'Escape [97;7u' 'C-M-a'
-assert_key 'Escape [97;9u' 's-a'
-assert_key 'Escape [97;17u' 'H-a'
-assert_key 'Escape [65;2u' 'S-A'
-
-# Keys with a dedicated tmux key code.
-assert_key 'Escape [9;5u' 'C-Tab'
-assert_key 'Escape [9;2u' 'BTab'
-assert_key 'Escape [13;5u' 'C-Enter'
-assert_key 'Escape [27u' 'Escape'
-assert_key 'Escape [32;5u' 'C-Space'
-assert_key 'Escape [127;5u' 'C-BSpace'
-
-# Keys with a CSI final byte other than u.
-assert_key 'Escape [1;5A' 'C-Up'
-assert_key 'Escape [1;3D' 'M-Left'
-assert_key 'Escape [1;5H' 'C-Home'
-assert_key 'Escape [1;5P' 'C-F1'
-
-# Functional and non-ASCII keys.
-assert_key 'Escape [57399;5u' 'C-KP0'
-assert_key 'Escape [233;5u' 'C-é'
-
-# The alternate key and associated text fields are not requested but must be
-# ignored if a terminal sends them anyway.
-assert_key 'Escape [97:65;2u' 'S-a'
-assert_key 'Escape [97:65:97;5u' 'C-a'
-assert_key 'Escape [97;5;97u' 'C-a'
-
-# A repeat event is a key press, a release event is dropped. The C-b that
-# follows shows that the sequence was consumed and not passed through.
-assert_key 'Escape [97;5:1u' 'C-a'
-assert_key 'Escape [97;5:2u' 'C-a'
-assert_key 'Escape [97;5:3u Escape [98;5u' 'C-b'
-
-# The Meta modifier bit is not representable and is dropped.
-assert_key 'Escape [97;33u Escape [98;5u' 'C-b'
-
-# Lock modifiers are ignored rather than dropping the key.
-assert_key 'Escape [97;65u' 'a'
-assert_key 'Escape [97;129u' 'a'
-
-$TMUX kill-server 2>/dev/null
-$TMUX2 kill-server 2>/dev/null
-
-exit $exit_status
--- a/regress/kitty-keys-terminal.sh
+++ b/regress/kitty-keys-terminal.sh
@@ -1,85 +0,0 @@
-#!/bin/sh
-
-# Test the Kitty keyboard protocol against a real terminal rather than against
-# another copy of tmux. This drives kitty through its remote control interface
-# so that kitty itself encodes the key presses.
-#
-# This has to be run by hand from this directory. The Makefile runs tests with
-# env -i, which removes DISPLAY and HOME, so kitty cannot start and this exits
-# immediately without testing anything. It is also skipped unless kitty is
-# installed and is new enough to have send-key.
-
-PATH=/bin:/usr/bin
-
-[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-
-command -v kitty >/dev/null 2>&1 || exit 0
-[ -n "$DISPLAY" ] || [ -n "$WAYLAND_DISPLAY" ] || exit 0
-kitty @ --help 2>/dev/null | grep -q 'send-key' || exit 0
-
-DIR=$(mktemp -d)
-CONF=$DIR/conf
-SOCKET=$DIR/kitty
-OUT=$DIR/out
-TMUX="$TEST_TMUX -LtestKrt$$ -f$CONF"
-
-printf '%s\n' 'set -g extended-keys on' \
-    'set -g extended-keys-format kitty' >"$CONF"
-
-cleanup()
-{
-	$TMUX kill-server 2>/dev/null
-	rm -rf "$DIR"
-}
-trap cleanup 0 1 15
-
-kitty -o allow_remote_control=yes --listen-on "unix:$SOCKET" \
-    -o confirm_os_window_close=0 -e \
-    $TMUX new-session -s r "sleep 120" >"$DIR/err" 2>&1 &
-
-# The terminfo entry for kitty may be missing, so treat a server which never
-# appears as a reason to skip rather than as a failure.
-i=0
-while ! $TMUX has-session -t r 2>/dev/null && [ "$i" -lt 150 ]; do
-	sleep 0.1
-	i=$((i + 1))
-done
-$TMUX has-session -t r 2>/dev/null || exit 0
-
-# The client must negotiate the protocol with the real terminal.
-i=0
-while [ "$($TMUX list-clients -F '#{client_key_mode}')" != 'Kitty 1' ] &&
-    [ "$i" -lt 100 ]; do
-	sleep 0.1
-	i=$((i + 1))
-done
-[ "$($TMUX list-clients -F '#{client_key_mode}')" = 'Kitty 1' ] || exit 1
-
-# kitty encodes the key, tmux parses it and encodes it again for the pane.
-try_key()
-{
-	key=$1
-	expected=$2
-
-	: >"$OUT"
-	$TMUX respawn-pane -k -t r: \
-	    "stty raw -echo; printf '\033[>1u'; dd bs=1 count=7 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 20" || return 1
-	sleep 1
-	kitty @ --to "unix:$SOCKET" send-key "$key" 2>/dev/null || return 1
-	i=0
-	while [ ! -s "$OUT" ] && [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ "$(tr -d ' \n' <"$OUT")" = "$expected" ]
-}
-
-try_key ctrl+a '1b5b39373b3575' || exit 1
-try_key alt+a '1b5b39373b3375' || exit 1
-try_key ctrl+shift+a '1b5b39373b3675' || exit 1
-
-# Super cannot be represented by the standard extended keys at all, so this
-# only succeeds if the whole chain used the Kitty protocol.
-try_key super+a '1b5b39373b3975' || exit 1
-
-exit 0
--- a/regress/kitty-keys.sh
+++ b/regress/kitty-keys.sh
@@ -1,108 +0,0 @@
-#!/bin/sh
-
-# Test pane-side Kitty keyboard protocol state and key encoding. This uses
-# synthetic protocol sequences and does not require a particular terminal.
-
-PATH=/bin:/usr/bin
-TERM=screen
-
-[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-CONF=$(mktemp)
-OUT=$(mktemp)
-TMUX="$TEST_TMUX -LtestK$$ -f$CONF"
-
-trap 'rm -f "$CONF" "$OUT"; $TMUX kill-server 2>/dev/null' 0 1 15
-
-printf '%s\n' 'set -g extended-keys on' >"$CONF"
-
-wait_for_output()
-{
-	i=0
-	while [ ! -s "$OUT" ] && [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ -s "$OUT" ]
-}
-
-wait_for_mode()
-{
-	wanted=$1
-	i=0
-	while [ "$($TMUX display-message -pt: '#{pane_key_mode}')" != "$wanted" ] &&
-	    [ "$i" -lt 50 ]; do
-		sleep 0.1
-		i=$((i + 1))
-	done
-	[ "$($TMUX display-message -pt: '#{pane_key_mode}')" = "$wanted" ]
-}
-
-check_output()
-{
-	expected=$1
-	actual=$(tr -d ' \n' <"$OUT")
-	if [ "$actual" != "$expected" ]; then
-		echo "expected $expected, got $actual"
-		exit 1
-	fi
-}
-
-$TMUX new-session -d -x80 -y24 \
-    "stty raw -echo; printf '\033[>1u'; dd bs=1 count=7 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5" || exit 1
-wait_for_mode 'Kitty 1'
-$TMUX send-keys -t: C-S-a
-wait_for_output
-check_output 1b5b39373b3675
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>1u'; dd bs=1 count=7 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_mode 'Kitty 1'
-$TMUX send-keys -t: s-a
-wait_for_output
-check_output 1b5b39373b3975
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>8u'; dd bs=1 count=5 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_mode 'Kitty 8'
-$TMUX send-keys -t: a
-wait_for_output
-check_output 1b5b393775
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>1u\033[?u'; dd bs=1 count=5 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_output
-check_output 1b5b3f3175
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>4;2m\033[?u'; dd bs=1 count=5 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_output
-check_output 1b5b3f3075
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>1u\033[>8u\033[<u\033[?u\033[>8u\033[<2u\033[?u'; dd bs=1 count=10 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_output
-check_output 1b5b3f31751b5b3f3075
-
-: >"$OUT"
-# "always" forces modifyOtherKeys mode 1, not Kitty keys.
-$TMUX set-option -g extended-keys always
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>0u\033[?u'; dd bs=1 count=5 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_output
-check_output 1b5b3f3075
-wait_for_mode 'Ext 1'
-$TMUX set-option -g extended-keys on
-
-: >"$OUT"
-$TMUX respawn-pane -k -t: \
-    "stty raw -echo; printf '\033[>1u\033[?u\033[?1049h\033[?u\033[>8u\033[?u\033[?1049l\033[?u'; dd bs=1 count=20 2>/dev/null | od -An -v -t x1 >'$OUT'; sleep 5"
-wait_for_output
-check_output 1b5b3f31751b5b3f30751b5b3f38751b5b3f3175
-
-$TMUX kill-server 2>/dev/null
-exit 0
--- a/regress/output-commands.sh
+++ b/regress/output-commands.sh
@@ -0,0 +1,115 @@
+#!/bin/sh
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -L${TEST_SOCKET:-testO$$} -f/dev/null"
+OUT=/tmp/tmux-output-commands-$$
+EXPECTED=$(printf 'one\ntwo')
+
+cleanup()
+{
+	$TMUX kill-server 2>/dev/null
+	rm -f "$OUT"
+}
+trap cleanup EXIT HUP INT TERM
+
+$TMUX kill-server 2>/dev/null
+$TMUX new-session -d -x80 -y20 "sh -c 'printf \"\\033]133;A\\007p\\$ \\033]133;B\\007echo\\n\\033]133;C\\007one\\ntwo\\n\\033]133;D;0\\007separator\\n\\033]133;A\\007p\\$ \\033]133;B\\007broken\\n\\033]133;C\\007unfinished\"; exec sleep 100'" || exit 1
+sleep 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+
+$TMUX send-keys -X pipe-output "wc -c >$OUT" || exit 1
+sleep 1
+[ "$(cat "$OUT")" = 10 ] || exit 1
+
+$TMUX send-keys -X copy-pipe-output "wc -c >$OUT" output || exit 1
+sleep 1
+[ "$(cat "$OUT")" = 10 ] || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+
+$TMUX send-keys -X select-output || exit 1
+$TMUX send-keys -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X select-output || exit 1
+$TMUX send-keys -X pipe-selection "wc -c >$OUT" || exit 1
+sleep 1
+[ "$(cat "$OUT")" = 10 ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X search-backward separator || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = "$EXPECTED" ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X search-backward one || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = "$EXPECTED" ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX new-window -d -n plain "printf 'alpha\\nbeta\\n'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :plain || exit 1
+$TMUX send-keys -t :plain.0 -X copy-output -a || exit 1
+all=$($TMUX show-buffer)
+case "$all" in
+*alpha*beta*) ;;
+*) exit 1 ;;
+esac
+$TMUX send-keys -t :plain.0 -X cancel || exit 1
+
+$TMUX set-buffer -b keep unchanged || exit 1
+$TMUX copy-mode -t :plain || exit 1
+$TMUX send-keys -t :plain.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer -b keep)" = unchanged ] || exit 1
+$TMUX send-keys -t :plain.0 -X cancel || exit 1
+
+$TMUX new-window -d -n empty "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\\007true\\033]133;C\\033]133;D;0\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :empty || exit 1
+$TMUX send-keys -t :empty.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :empty.0 -X cancel || exit 1
+
+$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
+$TMUX copy-mode -t :prompt || exit 1
+$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 :prompt || exit 1
+$TMUX send-keys -t :prompt.0 -X -N 100 cursor-down || exit 1
+$TMUX send-keys -t :prompt.0 C-o || exit 1
+[ "$($TMUX display-message -p -t :prompt.0 '#{selection_present}')" = 1 ] || exit 1
+$TMUX send-keys -t :prompt.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :prompt.0 -X cancel || exit 1
+
+$TMUX new-window -d -n same "printf '\\033]133;A\\007p\\$ \\033]133;B\\007echo\\n\\033]133;C\\007one\\033]133;D;0\\007\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :same || exit 1
+$TMUX send-keys -t :same.0 -X search-backward one || exit 1
+$TMUX send-keys -t :same.0 -X select-output || exit 1
+$TMUX send-keys -t :same.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :same.0 -X cancel || exit 1
+
+$TMUX new-window -d -n clear "printf 'old1\\nold2\\nold3\\nold4\\nold5\\nold6\\n\\033]133;A\\007p\\$ \\033]133;B\\007echo 1; clear; ps\\n\\033]133;C\\0071\\n\\033[H\\033[2JPID TTY\\n1 pts/0\\n\\033]133;D;0\\007separator\\n\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :clear || exit 1
+$TMUX send-keys -t :clear.0 C-o || exit 1
+$TMUX send-keys -t :clear.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = "$(printf 'PID TTY\n1 pts/0')" ] || exit 1
+$TMUX send-keys -t :clear.0 -X cancel || exit 1
+
+exit 0
--- a/screen-write.c
+++ b/screen-write.c
@@ -439,7 +439,6 @@ screen_write_reset(struct screen_write_ctx *ctx)

 	if (options_get_number(global_options, "extended-keys") == 2)
 		s->mode = (s->mode & ~EXTENDED_KEY_MODES)|MODE_KEYS_EXTENDED;
-	input_kitty_reset(s);

 	screen_write_clearscreen(ctx, 8);
 	screen_write_set_cursor(ctx, 0, 0);
--- a/screen.c
+++ b/screen.c
@@ -88,8 +88,6 @@ screen_init(struct screen *s, u_int sx, u_int sy, u_int hlimit)
 	s->default_cstyle = SCREEN_CURSOR_DEFAULT;
 	s->mode = MODE_CURSOR;
 	s->default_mode = 0;
-	memset(&s->kitty_keys, 0, sizeof s->kitty_keys);
-	memset(&s->saved_kitty_keys, 0, sizeof s->saved_kitty_keys);
 	s->ccolour = -1;
 	s->default_ccolour = -1;
 	s->tabs = NULL;
@@ -120,9 +118,9 @@ screen_reinit(struct screen *s, int check)

 	if (options_get_number(global_options, "extended-keys") == 2)
 		s->mode = (s->mode & ~EXTENDED_KEY_MODES)|MODE_KEYS_EXTENDED;
+
 	if (SCREEN_IS_ALTERNATE(s))
 		screen_alternate_off(s, NULL, 0);
-	input_kitty_reset(s);
 	s->saved_cx = UINT_MAX;
 	s->saved_cy = UINT_MAX;

@@ -700,7 +698,6 @@ screen_alternate_on(struct screen *s, struct grid_cell *gc, int cursor)

 	if (SCREEN_IS_ALTERNATE(s))
 		return 0;
-	input_kitty_alternate_on(s);
 	sx = screen_size_x(s);
 	sy = screen_size_y(s);

@@ -761,7 +758,6 @@ screen_alternate_off(struct screen *s, struct grid_cell *gc, int cursor)
 			s->cy = screen_size_y(s) - 1;
 		return 0;
 	}
-	input_kitty_alternate_off(s);

 	/* Restore the saved grid. */
 	grid_duplicate_lines(s->grid, screen_hsize(s), s->saved_grid, 0,
--- a/server-client.c
+++ b/server-client.c
@@ -2194,7 +2194,6 @@ server_client_reset_state(struct client *c)
 		log_debug("%s: client %s mode %s", __func__, c->name,
 		    screen_mode_to_string(mode));
 	}
-	tty_update_kitty(tty, s);

 	/* Reset region and margin. */
 	tty_region_off(tty);
--- a/spawn.c
+++ b/spawn.c
@@ -701,7 +701,7 @@ spawn_editor_finish(struct window_pane *wp)

 struct spawn_editor_state *
 spawn_editor(struct client *c, const char *buf, size_t len,
-    spawn_finish_edit_cb cb, void *arg)
+    const char *editor, spawn_finish_edit_cb cb, void *arg)
 {
 	struct spawn_editor_state	*es;
 	struct spawn_context		 sc = { 0 };
@@ -715,13 +715,13 @@ spawn_editor(struct client *c, const char *buf, size_t len,
 	FILE				*f;
 	char				*cmd, *cause = NULL;
 	char				 path[] = _PATH_TMP "tmux.XXXXXXXX";
-	const char			*editor;
 	int				 fd;

 	if (w->modal != NULL)
 		return (NULL);

-	editor = options_get_string(global_options, "editor");
+	if (editor == NULL)
+		editor = options_get_string(global_options, "editor");
 	fd = mkstemp(path);
 	if (fd == -1)
 		return (NULL);
--- a/tmux.1
+++ b/tmux.1
@@ -2006,6 +2006,25 @@ Same as
 .Ic copy\-pipe
 but also exit copy mode.
 .It Xo
+.Ic copy\-pipe\-output
+.Op Fl aCP
+.Op Ar command
+.Op Ar prefix
+.Xc
+Copy the current OSC 133 command output, pipe it to
+.Ar command ,
+and clear the selection.
+.Ar prefix
+is used to name the new paste buffer.
+.It Xo
+.Ic copy\-output
+.Op Fl aCP
+.Op Ar prefix
+.Xc
+Copy the current OSC 133 command output and clear the selection.
+.Ar prefix
+is used to name the new paste buffer.
+.It Xo
 .Ic copy\-selection
 .Op Fl CP
 .Op Ar prefix
@@ -2224,6 +2243,32 @@ but treat all non-whitespace characters as part of a word.
 .Xc
 Switch at which end of the selection the cursor sits.
 .It Xo
+.Ic open\-output
+.Op Fl a
+.Op Ar command
+.Xc
+Open the current OSC 133 command output in an editor.
+If
+.Ar command
+is given, it is used as the editor command; otherwise, the
+.Ic editor
+option is used.
+.It Xo
+.Ic open\-selection
+.Op Ar command
+.Xc
+Open the current selection in an editor.
+If
+.Ar command
+is given, it is used as the editor command; otherwise, the
+.Ic editor
+option is used.
+In emacs mode,
+.Ql e ,
+and in vi mode,
+.Ql M\-e ,
+opens the selection if one is present, otherwise the command output.
+.It Xo
 .Ic page\-down
 (vi: C\-f)
 (emacs: PageDown)
@@ -2264,6 +2309,21 @@ Same as
 .Ic pipe
 but also exit copy mode.
 .It Xo
+.Ic pipe\-output
+.Op Fl a
+.Op Ar command
+.Xc
+Pipe the current OSC 133 command output to
+.Ar command
+and clear the selection.
+.It Xo
+.Ic pipe\-selection
+.Op Ar command
+.Xc
+Pipe the selected text to
+.Ar command
+and clear the selection.
+.It Xo
 .Ic previous\-matching\-bracket
 (emacs: M\-C\-b)
 .Xc
@@ -2453,6 +2513,15 @@ Search forward for the specified plain text.
 Repeat the last search in the reverse direction (forward becomes backward and
 backward becomes forward).
 .It Xo
+.Ic select\-output
+.Op Fl a
+.Xc
+Select the current OSC 133 command output.
+The default emacs binding is
+.Ql C\-o
+and the default vi binding is
+.Ql M\-o .
+.It Xo
 .Ic select\-line
 (vi: V)
 .Xc
@@ -2496,6 +2565,20 @@ Toggle the visibility of the position indicator in the top right.
 Move to the top line.
 .El
 .Pp
+The output commands use OSC 133 output text from the
+.Ql C
+marker up to its matching
+.Ql D
+marker.
+If there is no
+.Ql D
+marker, the output ends at the end of the copy-mode buffer.
+At the following prompt or below it, they use the most recent nonempty output.
+With
+.Fl a ,
+they use the entire copy-mode buffer instead.
+If no output range can be found, they do nothing.
+.Pp
 The search commands come in several varieties:
 .Ql search\-forward
 and
@@ -4907,30 +4990,14 @@ If enabled, the server will exit when there are no attached clients.
 .It Xo Ic extended\-keys
 .Op Ic on | off | always
 .Xc
-Controls how modified keys are reported.
-When enabled,
-.Nm
-uses the Kitty keyboard protocol with terminals which support it, and the
+Controls how modified keys (keys pressed together with Control, Meta, or Shift)
+are reported.
+This is the equivalent of the
 .Ic modifyOtherKeys
 .Xr xterm 1
-resource with other terminals which support extended keys.
-Each client uses the best that its terminal supports, so clients with different
-terminals may be attached at the same time.
+resource.
 .Pp
-Programs inside panes may request either the Kitty keyboard protocol or
-.Ic modifyOtherKeys ,
-and keys are sent to each program in the form it requested, whichever client
-they were typed on.
-The Kitty keyboard protocol can report the Super and Hyper modifiers, whose key
-name prefixes are
-.Ql s-
-and
-.Ql H- ;
-its disambiguate and report-all enhancements are supported.
-.Pp
-For
-.Ic modifyOtherKeys ,
-when set to
+When set to
 .Ic on ,
 the program inside the pane can request one of two modes: mode 1 which changes
 the sequence for only keys which lack an existing well-known representation; or
@@ -4939,35 +5006,26 @@ When set to
 .Ic always ,
 modes 1 and 2 can still be requested by applications, but mode 1 will be forced
 instead of the standard mode.
-This applies only to applications inside panes; it does not force the Kitty
-keyboard protocol or change what
-.Nm
-requests from the terminal.
 When set to
 .Ic off ,
 this feature is disabled and only standard keys are reported.
 .Pp
 .Nm
 will always request extended keys itself if the terminal supports them.
-Support for the Kitty keyboard protocol is detected when a client attaches.
 See also the
-.Ic kittykeys
-and
 .Ic extkeys
-features for the
+feature for the
 .Ic terminal\-features
 option, the
 .Ic extended\-keys\-format
 option and the
 .Ic pane_key_mode
-and
-.Ic client_key_mode
-variables.
+variable.
 .It Xo Ic extended\-keys\-format
-.Op Ic csi\-u | xterm | kitty
+.Op Ic csi\-u | xterm
 .Xc
-Selects the format for reporting modified keys to programs which request
-.Ic modifyOtherKeys .
+Selects one of the two possible formats for reporting modified keys to
+applications.
 This is the equivalent of the
 .Ic formatOtherKeys
 .Xr xterm 1
@@ -4980,11 +5038,6 @@ and as
 .Ql \[ha][[65;6u
 when set to
 .Ic csi\-u .
-.Ic kitty
-is accepted for compatibility and is the same as
-.Ic csi\-u ;
-programs which request the Kitty keyboard protocol receive it whatever this
-option is set to.
 .It Xo Ic focus\-events
 .Op Ic on | off
 .Xc
@@ -5133,9 +5186,6 @@ Ignore function keys from
 and use the
 .Nm
 internal set only.
-.It kittykeys
-Supports the Kitty keyboard protocol.
-This is added automatically if the terminal answers the Kitty keyboard query.
 .It margins
 Supports DECSLRM margins.
 .It mouse
@@ -7342,7 +7392,6 @@ The following variables are available, where appropriate:
 .It Li "client_discarded" Ta "" Ta "Bytes discarded when client behind"
 .It Li "client_flags" Ta "" Ta "List of client flags"
 .It Li "client_height" Ta "" Ta "Height of client"
-.It Li "client_key_mode" Ta "" Ta "Extended key reporting mode for this client"
 .It Li "client_key_table" Ta "" Ta "Current key table"
 .It Li "client_last_session" Ta "" Ta "Name of the client's last session"
 .It Li "client_name" Ta "" Ta "Name of client"
--- a/tmux.h
+++ b/tmux.h
@@ -142,8 +142,6 @@ struct winlink;
 #define VISUAL_BOTH 2

 /* Key modifier bits. */
-#define KEYC_SUPER           0x00010000000000ULL
-#define KEYC_HYPER           0x00020000000000ULL
 #define KEYC_META            0x00100000000000ULL
 #define KEYC_CTRL            0x00200000000000ULL
 #define KEYC_SHIFT           0x00400000000000ULL
@@ -376,29 +374,6 @@ enum {
 	KEYC_F10,
 	KEYC_F11,
 	KEYC_F12,
-	KEYC_F13,
-	KEYC_F14,
-	KEYC_F15,
-	KEYC_F16,
-	KEYC_F17,
-	KEYC_F18,
-	KEYC_F19,
-	KEYC_F20,
-	KEYC_F21,
-	KEYC_F22,
-	KEYC_F23,
-	KEYC_F24,
-	KEYC_F25,
-	KEYC_F26,
-	KEYC_F27,
-	KEYC_F28,
-	KEYC_F29,
-	KEYC_F30,
-	KEYC_F31,
-	KEYC_F32,
-	KEYC_F33,
-	KEYC_F34,
-	KEYC_F35,
 	KEYC_IC,
 	KEYC_DC,
 	KEYC_HOME,
@@ -430,54 +405,6 @@ enum {
 	KEYC_KP_ENTER,
 	KEYC_KP_ZERO,
 	KEYC_KP_PERIOD,
-	KEYC_KP_EQUAL,
-	KEYC_KP_SEPARATOR,
-	KEYC_KP_LEFT,
-	KEYC_KP_RIGHT,
-	KEYC_KP_UP,
-	KEYC_KP_DOWN,
-	KEYC_KP_PPAGE,
-	KEYC_KP_NPAGE,
-	KEYC_KP_HOME,
-	KEYC_KP_END,
-	KEYC_KP_IC,
-	KEYC_KP_DC,
-	KEYC_KP_BEGIN,
-
-	/* Other function keys. */
-	KEYC_CAPSLOCK,
-	KEYC_SCROLLLOCK,
-	KEYC_NUMLOCK,
-	KEYC_PRINTSCREEN,
-	KEYC_PAUSE,
-	KEYC_MENU,
-	KEYC_MEDIA_PLAY,
-	KEYC_MEDIA_PAUSE,
-	KEYC_MEDIA_PLAYPAUSE,
-	KEYC_MEDIA_REVERSE,
-	KEYC_MEDIA_STOP,
-	KEYC_MEDIA_FASTFORWARD,
-	KEYC_MEDIA_REWIND,
-	KEYC_MEDIA_NEXT,
-	KEYC_MEDIA_PREVIOUS,
-	KEYC_MEDIA_RECORD,
-	KEYC_VOLUME_DOWN,
-	KEYC_VOLUME_UP,
-	KEYC_VOLUME_MUTE,
-	KEYC_LEFT_SHIFT,
-	KEYC_LEFT_CTRL,
-	KEYC_LEFT_ALT,
-	KEYC_LEFT_SUPER,
-	KEYC_LEFT_HYPER,
-	KEYC_LEFT_META,
-	KEYC_RIGHT_SHIFT,
-	KEYC_RIGHT_CTRL,
-	KEYC_RIGHT_ALT,
-	KEYC_RIGHT_SUPER,
-	KEYC_RIGHT_HYPER,
-	KEYC_RIGHT_META,
-	KEYC_ISO_LEVEL3_SHIFT,
-	KEYC_ISO_LEVEL5_SHIFT,

 	/* Theme reporting. */
 	KEYC_REPORT_DARK_THEME,
@@ -775,16 +702,6 @@ enum tty_code_code {
 #define CURSOR_MODES (MODE_CURSOR|MODE_CURSOR_BLINKING|MODE_CURSOR_VERY_VISIBLE)
 #define EXTENDED_KEY_MODES (MODE_KEYS_EXTENDED|MODE_KEYS_EXTENDED_2)

-/* Extended key output formats. */
-#define EXTENDED_KEYS_CSI_U 0
-#define EXTENDED_KEYS_XTERM 1
-#define EXTENDED_KEYS_KITTY 2
-
-/* Supported Kitty keyboard protocol flags. */
-#define KITTY_KEY_DISAMBIGUATE 0x1
-#define KITTY_KEY_REPORT_ALL 0x8
-#define KITTY_KEY_SUPPORTED (KITTY_KEY_DISAMBIGUATE|KITTY_KEY_REPORT_ALL)
-
 /* Mouse protocol constants. */
 #define MOUSE_PARAM_MAX 0xff
 #define MOUSE_PARAM_UTF8_MAX 0x7ff
@@ -1151,11 +1068,6 @@ struct progress_bar {
 /* Virtual screen. */
 struct screen_sel;
 struct screen_titles;
-struct kitty_key_state {
-	u_int	flags;
-	u_int	saved_flags;
-	int	have_saved;
-};
 struct screen {
 	char				*title;
 	char				*path;
@@ -1177,8 +1089,6 @@ struct screen {

 	int				 mode;
 	int				 default_mode;
-	struct kitty_key_state		 kitty_keys;
-	struct kitty_key_state		 saved_kitty_keys;

 	u_int				 saved_cx;
 	u_int				 saved_cy;
@@ -1829,7 +1739,6 @@ struct tty_term {
 #define TERM_VT100LIKE 0x20
 #define TERM_SIXEL 0x40
 #define TERM_INVALIDMS 0x80
-#define TERM_KITTYKEYS 0x100
 	int		 flags;

 	LIST_ENTRY(tty_term) entry;
@@ -1910,12 +1819,9 @@ struct tty {
 #define TTY_WAITBG 0x4000
 #define TTY_BRACKETPASTE 0x8000
 #define TTY_HAVESYNC 0x10000
-#define TTY_HAVEKKB 0x20000
-#define TTY_KKBPUSHED 0x40000
 #define TTY_ALL_REQUEST_FLAGS \
-	(TTY_HAVEDA|TTY_HAVEDA2|TTY_HAVEXDA|TTY_HAVESYNC|TTY_HAVEKKB)
+	(TTY_HAVEDA|TTY_HAVEDA2|TTY_HAVEXDA|TTY_HAVESYNC)
 	int		 flags;
-	u_int		 kitty_keys;

 	struct tty_term	*term;

@@ -3068,7 +2974,6 @@ int	tty_open(struct tty *, char **);
 void	tty_close(struct tty *);
 void	tty_free(struct tty *);
 void	tty_update_features(struct tty *);
-void	tty_update_kitty(struct tty *, struct screen *);
 void	tty_set_selection(struct tty *, const char *, const char *, size_t);
 void	tty_write(void (*)(struct tty *, const struct tty_ctx *),
 	    struct tty_ctx *);
@@ -3550,20 +3455,6 @@ int	 input_key(struct screen *, struct bufferevent *, key_code);
 int	 input_key_get_mouse(struct screen *, struct mouse_event *, u_int,
 	     u_int, const char **, size_t *);

-/* input-kitty.c */
-void	 input_kitty_reset(struct screen *);
-void	 input_kitty_alternate_on(struct screen *);
-void	 input_kitty_alternate_off(struct screen *);
-void	 input_kitty_set(struct screen *, u_int, int);
-void	 input_kitty_push(struct screen *, u_int);
-void	 input_kitty_pop(struct screen *, u_int);
-int	 input_key_kitty(struct screen *, struct bufferevent *, key_code);
-
-/* tty-kitty.c */
-int	 tty_keys_kitty(struct tty *, const char *, size_t, size_t *,
-	     key_code *);
-int	 tty_keys_kitty_query(struct tty *, const char *, size_t, size_t *);
-
 /* colour.c */
 int	 colour_find_rgb(u_char, u_char, u_char);
 int	 colour_join_rgb(u_char, u_char, u_char);
@@ -4336,7 +4227,7 @@ struct winlink	*spawn_window(struct spawn_context *, char **);
 struct window_pane *spawn_pane(struct spawn_context *, char **);
 typedef void (*spawn_finish_edit_cb)(char *, size_t, void *);
 struct spawn_editor_state *spawn_editor(struct client *, const char *, size_t,
-		     spawn_finish_edit_cb, void *);
+		     const char *, spawn_finish_edit_cb, void *);
 void		 spawn_cancel_editor(struct spawn_editor_state *);
 pid_t		 spawn_get_editor_pid(struct spawn_editor_state *);
 void		 spawn_editor_finish(struct window_pane *);
--- a/tty-features.c
+++ b/tty-features.c
@@ -235,13 +235,6 @@ static const struct tty_feature tty_feature_sync = {
 	0
 };

-/* Terminal supports the Kitty keyboard protocol. */
-static const struct tty_feature tty_feature_kittykeys = {
-	"kittykeys",
-	NULL,
-	TERM_KITTYKEYS
-};
-
 /* Terminal supports extended keys. */
 static const char *const tty_feature_extkeys_capabilities[] = {
 	"Eneks=\\E[>4;2m",
@@ -393,7 +386,6 @@ static const struct tty_feature *const tty_features[] = {
 	&tty_feature_extkeys,
 	&tty_feature_focus,
 	&tty_feature_ignorefkeys,
-	&tty_feature_kittykeys,
 	&tty_feature_margins,
 	&tty_feature_mouse,
 	&tty_feature_osc7,
--- a/tty-keys.c
+++ b/tty-keys.c
@@ -772,17 +772,6 @@ tty_keys_next(struct tty *tty)
 		goto partial_key;
 	}

-	/* Is this a Kitty keyboard protocol response? */
-	switch (tty_keys_kitty_query(tty, buf, len, &size)) {
-	case 0:		/* yes */
-		key = KEYC_UNKNOWN;
-		goto complete_key;
-	case -1:	/* no, or not valid */
-		break;
-	case 1:		/* partial */
-		goto partial_key;
-	}
-
 	/* Is this a synchronized update mode response? */
 	switch (tty_keys_sync(tty, buf, len, &size)) {
 	case 0:		/* yes */
@@ -869,18 +858,6 @@ tty_keys_next(struct tty *tty)
 		goto partial_key;
 	}

-	/* Is this an extended key press? */
-	switch (tty_keys_kitty(tty, buf, len, &size, &key)) {
-	case 0:		/* yes */
-		goto complete_key;
-	case -1:	/* no, or not valid */
-		break;
-	case -2:	/* yes, but not representable by tmux */
-		goto discard_key;
-	case 1:		/* partial */
-		goto partial_key;
-	}
-
 	/* Is this an extended key press? */
 	switch (tty_keys_extended_key(tty, buf, len, &size, &key)) {
 	case 0:		/* yes */
@@ -1112,8 +1089,6 @@ tty_keys_extended_key(struct tty *tty, const char *buf, size_t len,
 	utf8_char	 uc;

 	*size = 0;
-	if (tty->flags & TTY_KKBPUSHED)
-		return (-1);

 	/* First two bytes are always \033[. */
 	if (buf[0] != '\033')
@@ -1552,8 +1527,6 @@ tty_keys_device_attributes(struct tty *tty, const char *buf, size_t len,
 	}
 	log_debug("%s: received primary DA %.*s", c->name, (int)*size, buf);

-	/* A DA response without a preceding keyboard response means no support. */
-	tty->flags |= TTY_HAVEKKB;
 	tty_update_features(tty);
 	tty->flags |= TTY_HAVEDA;

--- a/tty-kitty.c
+++ b/tty-kitty.c
@@ -1,430 +0,0 @@
-/* $OpenBSD$ */
-
-/*
- * Copyright (c) 2026 Michael Grant <mgrant@grant.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
- * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <sys/types.h>
-
-#include <ctype.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "tmux.h"
-
-/* Detect support in the outside terminal and decode its key sequences. */
-
-struct tty_kitty_key {
-	u_int		 number;
-	key_code	 key;
-};
-
-static const struct tty_kitty_key tty_kitty_keys[] = {
-	{ 57358, KEYC_CAPSLOCK },
-	{ 57359, KEYC_SCROLLLOCK },
-	{ 57360, KEYC_NUMLOCK },
-	{ 57361, KEYC_PRINTSCREEN },
-	{ 57362, KEYC_PAUSE },
-	{ 57363, KEYC_MENU },
-	{ 57376, KEYC_F13 },
-	{ 57377, KEYC_F14 },
-	{ 57378, KEYC_F15 },
-	{ 57379, KEYC_F16 },
-	{ 57380, KEYC_F17 },
-	{ 57381, KEYC_F18 },
-	{ 57382, KEYC_F19 },
-	{ 57383, KEYC_F20 },
-	{ 57384, KEYC_F21 },
-	{ 57385, KEYC_F22 },
-	{ 57386, KEYC_F23 },
-	{ 57387, KEYC_F24 },
-	{ 57388, KEYC_F25 },
-	{ 57389, KEYC_F26 },
-	{ 57390, KEYC_F27 },
-	{ 57391, KEYC_F28 },
-	{ 57392, KEYC_F29 },
-	{ 57393, KEYC_F30 },
-	{ 57394, KEYC_F31 },
-	{ 57395, KEYC_F32 },
-	{ 57396, KEYC_F33 },
-	{ 57397, KEYC_F34 },
-	{ 57398, KEYC_F35 },
-	{ 57399, KEYC_KP_ZERO|KEYC_KEYPAD },
-	{ 57400, KEYC_KP_ONE|KEYC_KEYPAD },
-	{ 57401, KEYC_KP_TWO|KEYC_KEYPAD },
-	{ 57402, KEYC_KP_THREE|KEYC_KEYPAD },
-	{ 57403, KEYC_KP_FOUR|KEYC_KEYPAD },
-	{ 57404, KEYC_KP_FIVE|KEYC_KEYPAD },
-	{ 57405, KEYC_KP_SIX|KEYC_KEYPAD },
-	{ 57406, KEYC_KP_SEVEN|KEYC_KEYPAD },
-	{ 57407, KEYC_KP_EIGHT|KEYC_KEYPAD },
-	{ 57408, KEYC_KP_NINE|KEYC_KEYPAD },
-	{ 57409, KEYC_KP_PERIOD|KEYC_KEYPAD },
-	{ 57410, KEYC_KP_SLASH|KEYC_KEYPAD },
-	{ 57411, KEYC_KP_STAR|KEYC_KEYPAD },
-	{ 57412, KEYC_KP_MINUS|KEYC_KEYPAD },
-	{ 57413, KEYC_KP_PLUS|KEYC_KEYPAD },
-	{ 57414, KEYC_KP_ENTER|KEYC_KEYPAD },
-	{ 57415, KEYC_KP_EQUAL|KEYC_KEYPAD },
-	{ 57416, KEYC_KP_SEPARATOR|KEYC_KEYPAD },
-	{ 57417, KEYC_KP_LEFT|KEYC_KEYPAD },
-	{ 57418, KEYC_KP_RIGHT|KEYC_KEYPAD },
-	{ 57419, KEYC_KP_UP|KEYC_KEYPAD },
-	{ 57420, KEYC_KP_DOWN|KEYC_KEYPAD },
-	{ 57421, KEYC_KP_PPAGE|KEYC_KEYPAD },
-	{ 57422, KEYC_KP_NPAGE|KEYC_KEYPAD },
-	{ 57423, KEYC_KP_HOME|KEYC_KEYPAD },
-	{ 57424, KEYC_KP_END|KEYC_KEYPAD },
-	{ 57425, KEYC_KP_IC|KEYC_KEYPAD },
-	{ 57426, KEYC_KP_DC|KEYC_KEYPAD },
-	{ 57427, KEYC_KP_BEGIN|KEYC_KEYPAD },
-	{ 57428, KEYC_MEDIA_PLAY },
-	{ 57429, KEYC_MEDIA_PAUSE },
-	{ 57430, KEYC_MEDIA_PLAYPAUSE },
-	{ 57431, KEYC_MEDIA_REVERSE },
-	{ 57432, KEYC_MEDIA_STOP },
-	{ 57433, KEYC_MEDIA_FASTFORWARD },
-	{ 57434, KEYC_MEDIA_REWIND },
-	{ 57435, KEYC_MEDIA_NEXT },
-	{ 57436, KEYC_MEDIA_PREVIOUS },
-	{ 57437, KEYC_MEDIA_RECORD },
-	{ 57438, KEYC_VOLUME_DOWN },
-	{ 57439, KEYC_VOLUME_UP },
-	{ 57440, KEYC_VOLUME_MUTE },
-	{ 57441, KEYC_LEFT_SHIFT },
-	{ 57442, KEYC_LEFT_CTRL },
-	{ 57443, KEYC_LEFT_ALT },
-	{ 57444, KEYC_LEFT_SUPER },
-	{ 57445, KEYC_LEFT_HYPER },
-	{ 57446, KEYC_LEFT_META },
-	{ 57447, KEYC_RIGHT_SHIFT },
-	{ 57448, KEYC_RIGHT_CTRL },
-	{ 57449, KEYC_RIGHT_ALT },
-	{ 57450, KEYC_RIGHT_SUPER },
-	{ 57451, KEYC_RIGHT_HYPER },
-	{ 57452, KEYC_RIGHT_META },
-	{ 57453, KEYC_ISO_LEVEL3_SHIFT },
-	{ 57454, KEYC_ISO_LEVEL5_SHIFT }
-};
-
-static int
-tty_kitty_parse_number(const char *s, u_int *value, int empty)
-{
-	char		*end;
-	unsigned long	 number;
-
-	if (*s == '\0') {
-		if (!empty)
-			return (-1);
-		return (0);
-	}
-	if (!isdigit((u_char)*s))
-		return (-1);
-	number = strtoul(s, &end, 10);
-	if (*end != '\0' || number > UINT_MAX)
-		return (-1);
-	*value = number;
-	return (0);
-}
-
-static int
-tty_kitty_parse_list(char *s, u_int *first, u_int *second, int empty,
-    u_int maximum)
-{
-	char	*copy, *item;
-	u_int	 n = 0, value;
-	int	 result = 0;
-
-	copy = s;
-	while ((item = strsep(&copy, ":")) != NULL) {
-		if (maximum != 0 && n == maximum)
-			return (-1);
-		value = 0;
-		if (tty_kitty_parse_number(item, &value, empty) != 0) {
-			result = -1;
-			break;
-		}
-		if (n == 0 && *item != '\0')
-			*first = value;
-		else if (n == 1 && *item != '\0')
-			*second = value;
-		n++;
-	}
-	return (result);
-}
-
-static int
-tty_kitty_find_end(const char *buf, size_t len, size_t *end)
-{
-	size_t	i;
-
-	for (i = 2; i < len; i++) {
-		if (buf[i] == 'u' || buf[i] == '~' || buf[i] == 'A' ||
-		    buf[i] == 'B' || buf[i] == 'C' || buf[i] == 'D' ||
-		    buf[i] == 'E' || buf[i] == 'F' || buf[i] == 'H' ||
-		    buf[i] == 'P' || buf[i] == 'Q' || buf[i] == 'S') {
-			*end = i;
-			return (0);
-		}
-		if (!isdigit((u_char)buf[i]) && buf[i] != ';' && buf[i] != ':')
-			return (-1);
-	}
-	return (1);
-}
-
-static key_code
-tty_kitty_function(u_int number, char final)
-{
-	u_int	i;
-
-	if (final == 'u') {
-		switch (number) {
-		case 9:
-			return (C0_HT);
-		case 13:
-			return (C0_CR);
-		case 27:
-			return (C0_ESC);
-		case 127:
-			return (KEYC_BSPACE);
-		}
-		for (i = 0; i < nitems(tty_kitty_keys); i++) {
-			if (tty_kitty_keys[i].number == number)
-				return (tty_kitty_keys[i].key);
-		}
-		return (KEYC_NONE);
-	}
-
-	if (final == '~') {
-		switch (number) {
-		case 2: return (KEYC_IC);
-		case 3: return (KEYC_DC);
-		case 5: return (KEYC_PPAGE);
-		case 6: return (KEYC_NPAGE);
-		case 7: return (KEYC_HOME);
-		case 8: return (KEYC_END);
-		case 11: return (KEYC_F1);
-		case 12: return (KEYC_F2);
-		case 13: return (KEYC_F3);
-		case 14: return (KEYC_F4);
-		case 15: return (KEYC_F5);
-		case 17: return (KEYC_F6);
-		case 18: return (KEYC_F7);
-		case 19: return (KEYC_F8);
-		case 20: return (KEYC_F9);
-		case 21: return (KEYC_F10);
-		case 23: return (KEYC_F11);
-		case 24: return (KEYC_F12);
-		case 29: return (KEYC_MENU);
-		case 57427: return (KEYC_KP_BEGIN|KEYC_KEYPAD);
-		}
-		return (KEYC_UNKNOWN);
-	}
-	if (number != 1)
-		return (KEYC_UNKNOWN);
-	switch (final) {
-	case 'A': return (KEYC_UP|KEYC_CURSOR);
-	case 'B': return (KEYC_DOWN|KEYC_CURSOR);
-	case 'C': return (KEYC_RIGHT|KEYC_CURSOR);
-	case 'D': return (KEYC_LEFT|KEYC_CURSOR);
-	case 'E': return (KEYC_KP_BEGIN|KEYC_KEYPAD);
-	case 'F': return (KEYC_END);
-	case 'H': return (KEYC_HOME);
-	case 'P': return (KEYC_F1);
-	case 'Q': return (KEYC_F2);
-	case 'S': return (KEYC_F4);
-	}
-	return (KEYC_UNKNOWN);
-}
-
-int
-tty_keys_kitty_query(struct tty *tty, const char *buf, size_t len,
-    size_t *size)
-{
-	struct client	*c = tty->client;
-	size_t		 i;
-	u_int		 flags = 0;
-
-	*size = 0;
-	if (tty->flags & TTY_HAVEKKB)
-		return (-1);
-
-	if (buf[0] != '\033')
-		return (-1);
-	if (len == 1)
-		return (1);
-	if (buf[1] != '[')
-		return (-1);
-	if (len == 2)
-		return (1);
-	if (buf[2] != '?')
-		return (-1);
-	if (len == 3)
-		return (1);
-
-	for (i = 3; i < len && isdigit((u_char)buf[i]); i++) {
-		if (flags > (UINT_MAX - (buf[i] - '0')) / 10)
-			return (-1);
-		flags = (flags * 10) + (buf[i] - '0');
-	}
-	if (i == len)
-		return (1);
-	if (i == 3 || buf[i] != 'u')
-		return (-1);
-
-	*size = i + 1;
-	tty->kitty_keys = flags;
-	tty->flags |= TTY_HAVEKKB;
-	log_debug("%s: received Kitty keyboard flags %u", c->name, flags);
-	tty_parse_client_features(c, "kittykeys", ",");
-	tty_update_features(tty);
-	return (0);
-}
-
-void
-tty_update_kitty(struct tty *tty, struct screen *s)
-{
-	u_int	flags;
-	char	buf[32];
-
-	if (options_get_number(global_options, "extended-keys") == 0 ||
-	    (~tty->term->flags & TERM_KITTYKEYS)) {
-		if (tty->flags & TTY_KKBPUSHED) {
-			tty_puts(tty, "\033[<u");
-			tty->flags &= ~TTY_KKBPUSHED;
-		}
-		return;
-	}
-	flags = KITTY_KEY_DISAMBIGUATE;
-	if (s != NULL && (s->kitty_keys.flags & KITTY_KEY_SUPPORTED) != 0)
-		flags = s->kitty_keys.flags & KITTY_KEY_SUPPORTED;
-	if ((tty->flags & TTY_KKBPUSHED) == 0) {
-		xsnprintf(buf, sizeof buf, "\033[>%uu", flags);
-		tty_puts(tty, buf);
-		tty->flags |= TTY_KKBPUSHED;
-	} else if (tty->kitty_keys != flags) {
-		xsnprintf(buf, sizeof buf, "\033[=%uu", flags);
-		tty_puts(tty, buf);
-	}
-	tty->kitty_keys = flags;
-}
-
-int
-tty_keys_kitty(struct tty *tty, const char *buf, size_t len, size_t *size,
-    key_code *key)
-{
-	struct client	*c = tty->client;
-	struct utf8_data ud;
-	utf8_char	 uc;
-	size_t		 end;
-	char		 tmp[128], *copy, *field, final;
-	u_int		 number = 0, modifiers = 1, event = 1, value;
-	u_int		 fields = 0;
-	key_code	 nkey, onlykey;
-	int		 result;
-
-	*size = 0;
-	if ((tty->flags & TTY_KKBPUSHED) == 0)
-		return (-1);
-	if (len == 0 || buf[0] != '\033')
-		return (-1);
-	if (len == 1)
-		return (1);
-	if (buf[1] != '[')
-		return (-1);
-	if (len == 2)
-		return (1);
-	if (buf[2] == '?')
-		return (-1);
-
-	result = tty_kitty_find_end(buf, len, &end);
-	if (result != 0)
-		return (result);
-	if (end - 2 >= sizeof tmp)
-		return (-1);
-	memcpy(tmp, buf + 2, end - 2);
-	tmp[end - 2] = '\0';
-	final = buf[end];
-	*size = end + 1;
-
-	copy = tmp;
-	while ((field = strsep(&copy, ";")) != NULL) {
-		if (fields == 3)
-			return (-1);
-		value = 0;
-		if (fields == 0) {
-			if (*field == '\0') {
-				if (final == 'u')
-					return (-1);
-				number = 1;
-			} else if (tty_kitty_parse_list(field, &number, &value,
-			    1, 3) != 0)
-				return (-1);
-		} else if (fields == 1) {
-			if (tty_kitty_parse_list(field, &modifiers, &event, 1,
-			    2) != 0)
-				return (-1);
-		} else if (tty_kitty_parse_list(field, &value, &value, 1, 0) != 0)
-			return (-1);
-		fields++;
-	}
-	if (fields == 0 || number == 0 || modifiers == 0)
-		return (-1);
-	if (event == 0 || event == 3 || event > 3)
-		return (-2);
-
-	modifiers--;
-	if (modifiers & 32)
-		return (-2);
-	nkey = tty_kitty_function(number, final);
-	if (nkey == KEYC_NONE) {
-		if (final != 'u')
-			return (-1);
-		if (number >= 57344 && number <= 63743)
-			return (-2);
-		if (number <= 0x7f)
-			nkey = number;
-		else if (utf8_fromwc(number, &ud) != UTF8_DONE ||
-		    utf8_from_data(&ud, &uc) != UTF8_DONE)
-			return (-2);
-		else
-			nkey = uc;
-	} else if (nkey == KEYC_UNKNOWN)
-		return (-1);
-
-	if (modifiers & 1)
-		nkey |= KEYC_SHIFT;
-	if (modifiers & 2)
-		nkey |= KEYC_META|KEYC_IMPLIED_META;
-	if (modifiers & 4)
-		nkey |= KEYC_CTRL;
-	if (modifiers & 8)
-		nkey |= KEYC_SUPER;
-	if (modifiers & 16)
-		nkey |= KEYC_HYPER;
-
-	/* Shift-Tab has a dedicated tmux key code. */
-	onlykey = nkey & KEYC_MASK_KEY;
-	if (onlykey == C0_HT && (nkey & KEYC_SHIFT))
-		nkey = KEYC_BTAB|(nkey & ~KEYC_MASK_KEY & ~KEYC_SHIFT);
-
-	if (log_get_level() != 0) {
-		log_debug("%s: Kitty key %.*s is %llx (%s)", c->name,
-		    (int)*size, buf, nkey, key_string_lookup_key(nkey, 1));
-	}
-	*key = nkey;
-	return (0);
-}
--- a/tty.c
+++ b/tty.c
@@ -409,8 +409,6 @@ tty_send_requests(struct tty *tty)
 		return;

 	if (tty->term->flags & TERM_VT100LIKE) {
-		if (~tty->flags & TTY_HAVEKKB)
-			tty_puts(tty, "\033[?u");
 		if (~tty->flags & TTY_HAVEDA)
 			tty_puts(tty, "\033[c");
 		if (~tty->flags & TTY_HAVEDA2)
@@ -509,10 +507,6 @@ tty_stop_tty(struct tty *tty)
 		tty_raw(tty, "\033[?7727l");
 	tty_raw(tty, tty_term_string(tty->term, TTYC_DSFCS));
 	tty_raw(tty, tty_term_string(tty->term, TTYC_DSEKS));
-	if (tty->flags & TTY_KKBPUSHED) {
-		tty_raw(tty, "\033[<u");
-		tty->flags &= ~TTY_KKBPUSHED;
-	}

 	if (tty_use_margin(tty))
 		tty_raw(tty, tty_term_string(tty->term, TTYC_DSMG));
@@ -565,12 +559,8 @@ tty_update_features(struct tty *tty)

 	if (tty_use_margin(tty))
 		tty_putcode(tty, TTYC_ENMG);
-	if (options_get_number(global_options, "extended-keys") == 0 ||
-	    (tty->term->flags & TERM_KITTYKEYS))
-		tty_puts(tty, tty_term_string(tty->term, TTYC_DSEKS));
-	else
+	if (options_get_number(global_options, "extended-keys"))
 		tty_puts(tty, tty_term_string(tty->term, TTYC_ENEKS));
-	tty_update_kitty(tty, NULL);
 	if (options_get_number(global_options, "focus-events"))
 		tty_puts(tty, tty_term_string(tty->term, TTYC_ENFCS));
 	if (tty->term->flags & TERM_VT100LIKE)
--- a/window-buffer.c
+++ b/window-buffer.c
@@ -606,7 +606,8 @@ window_buffer_start_edit(struct window_buffer_modedata *data,
 	ed->name = xstrdup(paste_buffer_name(pb));
 	ed->pb = pb;

-	ed->editor = spawn_editor(c, buf, len, window_buffer_edit_close_cb, ed);
+	ed->editor = spawn_editor(c, buf, len, NULL, window_buffer_edit_close_cb,
+	    ed);
 	if (ed->editor == NULL)
 		window_buffer_finish_edit(ed);
 	else {
--- a/window-copy.c
+++ b/window-copy.c
@@ -117,9 +117,20 @@ static int	window_copy_set_selection(struct window_mode_entry *, int, int);
 static int	window_copy_update_selection(struct window_mode_entry *, int,
 		    int);
 static void	window_copy_synchronize_cursor(struct window_mode_entry *, int);
+static int	window_copy_find_output_range(struct window_mode_entry *,
+		    u_int *, u_int *, u_int *, u_int *);
+static int	window_copy_find_previous_output_range(struct window_mode_entry *,
+		    u_int, u_int, u_int *, u_int *, u_int *, u_int *);
+static void	window_copy_output_end(struct screen *, u_int *, u_int *);
 static void    *window_copy_get_selection(struct window_mode_entry *, size_t *);
+static void    *window_copy_get_output(struct window_mode_entry *, size_t *,
+		    int);
+static void    *window_copy_get_grid_range(struct window_mode_entry *, u_int,
+		    u_int, u_int, u_int, size_t *);
 static void	window_copy_copy_buffer(struct window_mode_entry *,
 		    const char *, void *, size_t, int, int);
+static void	window_copy_pipe_buffer(struct session *, const char *, void *,
+		    size_t);
 static void	window_copy_pipe(struct window_mode_entry *,
 		    struct session *, const char *);
 static void	window_copy_copy_pipe(struct window_mode_entry *,
@@ -1587,6 +1598,80 @@ window_copy_cmd_copy_selection_and_cancel(struct window_copy_cmd_state *cs)
 	return (WINDOW_COPY_CMD_CANCEL);
 }

+static enum window_copy_cmd_action
+window_copy_cmd_select_output(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid_reader		 gr;
+	void				*buf;
+	size_t				 len;
+	u_int				 sx, sy, ex, ey, total;
+	int				 all = args_has(cs->wargs, 'a');
+
+	if (all) {
+		sx = sy = 0;
+		total = data->backing->grid->hsize + data->backing->grid->sy;
+		ey = total - 1;
+		ex = grid_get_line(data->backing->grid, ey)->cellused;
+	} else if (!window_copy_find_output_range(wme, &sx, &sy, &ex, &ey))
+		return (WINDOW_COPY_CMD_NOTHING);
+	buf = window_copy_get_output(wme, &len, all);
+	if (buf == NULL)
+		return (WINDOW_COPY_CMD_NOTHING);
+	free(buf);
+
+	window_copy_clear_selection(wme);
+	data->lineflag = LINE_SEL_NONE;
+	data->rectflag = 0;
+	data->selflag = SEL_CHAR;
+	window_copy_scroll_to(wme, sx, sy, 1);
+	window_copy_start_selection(wme);
+	if (options_get_number(wme->wp->window->options, "mode-keys") ==
+	    MODEKEY_VI) {
+		grid_reader_start(&gr, data->backing->grid, ex, ey);
+		grid_reader_cursor_left(&gr, 1);
+		grid_reader_get_cursor(&gr, &ex, &ey);
+	}
+	window_copy_scroll_to(wme, ex, ey, 1);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*prefix = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+	int				 set_paste = !args_has(cs->wargs, 'P');
+	int				 set_clip = !args_has(cs->wargs, 'C');
+
+	if (arg0 != NULL)
+		prefix = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL)
+			window_copy_copy_buffer(wme, prefix, buf, len, set_paste,
+			    set_clip);
+	}
+	free(prefix);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_copy_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
 static enum window_copy_cmd_action
 window_copy_cmd_cursor_down(struct window_copy_cmd_state *cs)
 {
@@ -2742,6 +2827,133 @@ window_copy_cmd_pipe_and_cancel(struct window_copy_cmd_state *cs)
 	return (WINDOW_COPY_CMD_CANCEL);
 }

+static enum window_copy_cmd_action
+window_copy_cmd_copy_pipe_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*command = NULL, *prefix = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	const char			*arg1 = args_string(cs->wargs, 1);
+	size_t				 len;
+	int				 set_paste = !args_has(cs->wargs, 'P');
+	int				 set_clip = !args_has(cs->wargs, 'C');
+
+	if (arg1 != NULL)
+		prefix = format_single(NULL, arg1, c, s, wl, wp);
+	if (s != NULL && arg0 != NULL && *arg0 != '\0')
+		command = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL) {
+			window_copy_pipe_buffer(s, command, buf, len);
+			window_copy_copy_buffer(wme, prefix, buf, len, set_paste,
+			    set_clip);
+		}
+	}
+	free(command);
+	free(prefix);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_pipe_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_copy_pipe_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_pipe_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*command = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (s != NULL && arg0 != NULL && *arg0 != '\0')
+		command = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL) {
+			window_copy_pipe_buffer(s, command, buf, len);
+			free(buf);
+		}
+	}
+	free(command);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_pipe_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_pipe_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static void
+window_copy_open_done(char *buf, __unused size_t len, __unused void *arg)
+{
+	free(buf);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_open_selection(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct window_copy_mode_data	*data = wme->data;
+	void				*buf;
+	char				*editor = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (cs->c == NULL ||
+	    (data->screen.sel == NULL && data->lineflag == LINE_SEL_NONE))
+		return (WINDOW_COPY_CMD_NOTHING);
+	if (arg0 != NULL && *arg0 != '\0')
+		editor = format_single(NULL, arg0, cs->c, cs->s, cs->wl, wme->wp);
+	buf = window_copy_get_selection(wme, &len);
+	if (buf != NULL) {
+		spawn_editor(cs->c, buf, len, editor, window_copy_open_done, NULL);
+		free(buf);
+	}
+	free(editor);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_open_output(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	void				*buf;
+	char				*editor = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (cs->c == NULL)
+		return (WINDOW_COPY_CMD_NOTHING);
+	if (arg0 != NULL && *arg0 != '\0')
+		editor = format_single(NULL, arg0, cs->c, cs->s, cs->wl, wme->wp);
+	buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+	if (buf != NULL) {
+		spawn_editor(cs->c, buf, len, editor, window_copy_open_done, NULL);
+		free(buf);
+	}
+	free(editor);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
 static enum window_copy_cmd_action
 window_copy_cmd_goto_line(struct window_copy_cmd_state *cs)
 {
@@ -3404,6 +3616,18 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_copy_pipe_and_cancel
 	},
+	{ .command = "copy-pipe-output",
+	  .args = { "aCP", 0, 2, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_copy_pipe_output
+	},
+	{ .command = "copy-output",
+	  .args = { "aCP", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_copy_output
+	},
 	{ .command = "copy-selection-no-clear",
 	  .args = { "CP", 0, 1, NULL },
 	  .flags = 0,
@@ -3626,6 +3850,18 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_EMACS_ONLY,
 	  .f = window_copy_cmd_other_end
 	},
+	{ .command = "open-output",
+	  .args = { "a", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_NEVER,
+	  .f = window_copy_cmd_open_output
+	},
+	{ .command = "open-selection",
+	  .args = { "", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_NEVER,
+	  .f = window_copy_cmd_open_selection
+	},
 	{ .command = "page-down",
 	  .args = { "", 0, 0, NULL },
 	  .flags = WINDOW_COPY_CMD_FLAG_READONLY,
@@ -3662,6 +3898,18 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_pipe_and_cancel
 	},
+	{ .command = "pipe-output",
+	  .args = { "a", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_pipe_output
+	},
+	{ .command = "pipe-selection",
+	  .args = { "", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_pipe
+	},
 	{ .command = "previous-matching-bracket",
 	  .args = { "", 0, 0, NULL },
 	  .flags = WINDOW_COPY_CMD_FLAG_READONLY,
@@ -3839,6 +4087,12 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_search_reverse
 	},
+	{ .command = "select-output",
+	  .args = { "a", 0, 0, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_select_output
+	},
 	{ .command = "select-line",
 	  .args = { "", 0, 0, NULL },
 	  .flags = 0,
@@ -5970,6 +6224,185 @@ window_copy_set_selection(struct window_mode_entry *wme, int may_redraw,
 	return (1);
 }

+/* Find the output range for the command at the cursor. */
+static int
+window_copy_find_output_range(struct window_mode_entry *wme, u_int *sx,
+    u_int *sy, u_int *ex, u_int *ey)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	struct grid_line		*gl;
+	u_int				 cursor_x, cursor_y, prompt_x = 0;
+	u_int				 prompt_y = UINT_MAX, y, total;
+	int				 found_start = 0, found_end = 0;
+
+	cursor_x = data->cx;
+	cursor_y = screen_hsize(data->backing) + data->cy - data->oy;
+	log_debug("%s: cursor at %u,%u", __func__, cursor_x, cursor_y);
+
+	total = gd->hsize + gd->sy;
+	for (y = 0; y < total; y++) {
+		gl = grid_get_line(gd, y);
+		if (~gl->flags & GRID_LINE_START_PROMPT)
+			continue;
+		if (y > cursor_y ||
+		    (y == cursor_y && gl->osc133_data.prompt_col > cursor_x))
+			break;
+		prompt_y = y;
+		prompt_x = gl->osc133_data.prompt_col;
+	}
+	if (prompt_y == UINT_MAX) {
+		log_debug("%s: no osc133 prompt before cursor", __func__);
+		return (0);
+	}
+	log_debug("%s: prompt at %u,%u", __func__, prompt_x, prompt_y);
+
+	for (y = prompt_y; y < total; y++) {
+		gl = grid_get_line(gd, y);
+		/* An output may end on the next prompt's line. */
+		if (found_start && gl->flags & GRID_LINE_END_OUTPUT &&
+		    (y != prompt_y || gl->osc133_data.out_end_col >= prompt_x)) {
+			*ex = gl->osc133_data.out_end_col;
+			*ey = y;
+			found_end = 1;
+			break;
+		}
+		if (y != prompt_y && gl->flags & GRID_LINE_START_PROMPT)
+			break;
+		if (gl->flags & GRID_LINE_START_OUTPUT &&
+		    (y != prompt_y || gl->osc133_data.out_start_col >= prompt_x)) {
+			*sx = gl->osc133_data.out_start_col;
+			*sy = y;
+			found_start = 1;
+		}
+	}
+	if (!found_start) {
+		log_debug("%s: no output after prompt", __func__);
+		return (window_copy_find_previous_output_range(wme, cursor_x,
+		    cursor_y, sx, sy, ex, ey));
+	}
+	if (!found_end) {
+		if (y != total) {
+			log_debug("%s: output interrupted by next prompt", __func__);
+			return (0);
+		}
+		window_copy_output_end(data->backing, ex, ey);
+	}
+	log_debug("%s: output from %u,%u to %u,%u", __func__, *sx, *sy,
+	    *ex, *ey);
+	return (1);
+}
+
+/* Find the most recent complete output at or before a position. */
+static int
+window_copy_find_previous_output_range(struct window_mode_entry *wme,
+    u_int cursor_x, u_int cursor_y, u_int *sx, u_int *sy, u_int *ex,
+    u_int *ey)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	struct grid_line		*gl;
+	void				*buf;
+	u_int				 start_x, start_y, end_x, end_y;
+	u_int				 y, total;
+	size_t				 len;
+	int				 found = 0, have_prompt = 0;
+	int				 pending = 0;
+
+	total = gd->hsize + gd->sy;
+	for (y = 0; y < total && y <= cursor_y; y++) {
+		gl = grid_get_line(gd, y);
+		if (gl->flags & GRID_LINE_START_OUTPUT &&
+		    (y != cursor_y || gl->osc133_data.out_start_col <= cursor_x)) {
+			start_x = gl->osc133_data.out_start_col;
+			start_y = y;
+			pending = 1;
+		}
+		/* The output may have cleared its C marker from the screen. */
+		if (!pending && !have_prompt &&
+		    gl->flags & GRID_LINE_END_OUTPUT &&
+		    (~gl->flags & GRID_LINE_START_PROMPT ||
+		    gl->osc133_data.out_end_col <= gl->osc133_data.prompt_col)) {
+			start_x = start_y = 0;
+			pending = 1;
+		}
+		if (pending && gl->flags & GRID_LINE_END_OUTPUT &&
+		    (y != cursor_y || gl->osc133_data.out_end_col <= cursor_x)) {
+			end_x = gl->osc133_data.out_end_col;
+			end_y = y;
+			buf = window_copy_get_grid_range(wme, start_x, start_y,
+			    end_x, end_y, &len);
+			if (buf != NULL) {
+				free(buf);
+				*sx = start_x;
+				*sy = start_y;
+				*ex = end_x;
+				*ey = end_y;
+				found = 1;
+			}
+			pending = 0;
+		}
+		if (gl->flags & GRID_LINE_START_PROMPT) {
+			pending = 0;
+			have_prompt = 1;
+		}
+	}
+	return (found);
+}
+
+static void
+window_copy_output_end(struct screen *s, u_int *x, u_int *y)
+{
+	*x = s->cx;
+	*y = screen_hsize(s) + s->cy;
+}
+
+static void *
+window_copy_get_output(struct window_mode_entry *wme, size_t *len, int all)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	u_int				 sx, sy, ex, ey, total;
+
+	total = gd->hsize + gd->sy;
+	if (all) {
+		sx = sy = 0;
+		ey = total - 1;
+		ex = grid_get_line(gd, ey)->cellused;
+	} else if (!window_copy_find_output_range(wme, &sx, &sy, &ex, &ey)) {
+		*len = 0;
+		return (NULL);
+	}
+	return (window_copy_get_grid_range(wme, sx, sy, ex, ey, len));
+}
+
+static void *
+window_copy_get_grid_range(struct window_mode_entry *wme, u_int sx, u_int sy,
+    u_int ex, u_int ey, size_t *len)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	char				*buf;
+	size_t				 off;
+	u_int				 i;
+
+	buf = xmalloc(1);
+	off = 0;
+	for (i = sy; i <= ey; i++) {
+		window_copy_copy_line(wme, &buf, &off, i, i == sy ? sx : 0,
+		    i == ey ? ex : gd->sx);
+	}
+	if (off != 0 && buf[off - 1] == '\n')
+		off--;
+	if (off == 0) {
+		free(buf);
+		*len = 0;
+		return (NULL);
+	}
+	*len = off;
+	return (buf);
+}
+
 static void *
 window_copy_get_selection(struct window_mode_entry *wme, size_t *len)
 {
@@ -6102,8 +6535,7 @@ window_copy_copy_buffer(struct window_mode_entry *wme, const char *prefix,

 	if (set_clip &&
 	    options_get_number(global_options, "set-clipboard") != 0) {
-		if (window_copy_line_numbers_active(wme) &&
-		    (wp->flags & PANE_REDRAW)) {
+		if (wp->flags & PANE_REDRAW) {
 			/* Clear PANE_REDRAW so clipboard write not skipped. */
 			redraw = PANE_REDRAW;
 			wp->flags &= ~PANE_REDRAW;
@@ -6126,18 +6558,28 @@ window_copy_pipe_run(struct window_mode_entry *wme, struct session *s,
    const char *cmd, size_t *len)
 {
 	void		*buf;
-	struct job	*job;

 	buf = window_copy_get_selection(wme, len);
+	window_copy_pipe_buffer(s, cmd, buf, *len);
+	return (buf);
+}
+
+static void
+window_copy_pipe_buffer(struct session *s, const char *cmd, void *buf,
+    size_t len)
+{
+	struct job	*job;
+
+	if (buf == NULL)
+		return;
 	if (cmd == NULL || *cmd == '\0')
 		cmd = options_get_string(global_options, "copy-command");
 	if (cmd != NULL && *cmd != '\0') {
 		job = job_run(cmd, 0, NULL, NULL, s, NULL, NULL, NULL, NULL,
 		    NULL, JOB_NOWAIT, -1, -1);
 		if (job != NULL)
-			bufferevent_write(job_get_event(job), buf, *len);
+			bufferevent_write(job_get_event(job), buf, len);
 	}
-	return (buf);
 }

 static void
--- a/window-customize.c
+++ b/window-customize.c
@@ -2104,8 +2104,8 @@ window_customize_start_edit(struct window_customize_modedata *data,
 		buf = "\n";
 		len = 1;
 	}
-	ed->editor = spawn_editor(c, buf, len, window_customize_edit_close_cb,
-	    ed);
+	ed->editor = spawn_editor(c, buf, len, NULL,
+	    window_customize_edit_close_cb, ed);
 	free(value);
 	if (ed->editor == NULL)
 		window_customize_finish_edit(ed);
Author	SHA1	Message	Date
Michael Grant	a8b05dd7d7	Add pipe-selection copy mode command	2026-09-14 06:25:40 +01:00
Michael Grant	71865a58d1	Add OSC 133 copy mode output commands	2026-09-14 05:35:34 +01:00
Michael Grant	9837766857	Allow callers to override editor command	2026-09-14 05:35:00 +01:00