Update CHANGES and tests.

whinging about not supporting it, GitHub issue 5626 from Pete Dietl.

.github/workflows/regress.yml

@@ -72,14 +72,14 @@ jobs:
 
       - name: build
         run: |
-         sh autogen.sh
+          sh autogen.sh
           ./configure ${{ matrix.configure }}
           ${{ matrix.make }} -j"$(getconf _NPROCESSORS_ONLN)"
 
       - name: test
         run: |
           cd regress
-          ${{ matrix.make }}
+          ${{ matrix.make }} -j"$(getconf _NPROCESSORS_ONLN)"
 
       - name: logs
         if: failure()

CHANGES

@@ -10,8 +10,8 @@ CHANGES FROM 3.7c TO 3.8
   - modal panes may be created with new-pane -O; a window can have one modal
     pane and it prevents interaction with the other panes while it is active.
     -C closes the pane when the mouse is clicked outside it and -K sends all
-    keys, including the prefix key, to the pane. A modal pane is now used for
-    the editor in buffer mode;
+    keys, including the prefix key, to the pane. -D closes the modal pane with
+    Escape or C-c. A modal pane is now used for the editor in buffer mode;
 
   - new-pane -A creates a floating pane which remains above a zoomed pane;
     modal panes do this by default;
@@ -39,6 +39,9 @@ CHANGES FROM 3.7c TO 3.8
   The old format is still accepted; control mode clients receive old layouts
   unless they set the new-layouts flag.
 
+* Add remain-on-exit failed-key to keep a pane open after a failed command
+  until a key is pressed.
+
 * Add support for themes and improve default colours:
 
   - tmux now has builtin light and dark colour themes for terminals with 256 or
@@ -111,22 +114,16 @@ 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.
 
+* Add an appesc terminal feature for mintty's application escape key mode,
+  avoiding unsupported sequences on other terminals (Pete Dietl, issue 5626).
+
+* Preserve existing Ss and Se terminfo capabilities for cursor styles and
+  restoring the default cursor (issue 5476).
+
 * Add a #{A/count:frames} modifier to show a series of frames as an animation
   in the status line (issue 5412 from Fernando Daciuk).
 
@@ -201,10 +198,23 @@ CHANGES FROM 3.7c TO 3.8
   sent inside %begin/%end (issue 5458), do not let a stuck client prevent the
   server from exiting (issue 5444), and reset control mode offsets when a pane
   is respawned (issue 5498). Bound buffered command replies so a control mode
-  client that stops reading cannot consume unlimited memory (issue 5565).
+  client that stops reading cannot consume unlimited memory (issue 5565), and
+  fix a collision between the output discard and bracketed paste flags (issue
+  5622).
 
 * Fix grouped sessions sometimes being left as unusable command targets while
-  they are being killed (Bryce Miller, issue 5180).
+  they are being killed (Bryce Miller, issue 5180), and prevent reuse of a
+  session with no windows while detaching (Heon Jeong, issue 5620).
+
+* Free wait-for clients when they disconnect and do not run their remaining
+  queued commands (issue 5614).
+
+* Expand formats in run-shell -c like other start-directory flags (reported by
+  Saul Nogueras).
+
+* Fix session alert flag formats to check all windows (issue 5599).
+
+* Do not clear the marked pane when clicking on a pane border.
 
 * Fix choose mode filtering when more than one pane exists (issue 5326), and
   fix an infinite loop in customize mode when a filter does not match.
@@ -215,11 +225,18 @@ CHANGES FROM 3.7c TO 3.8
   status lines, menus, popups, wide characters and floating panes. This
   includes fixes for flicker with alternate screen applications and scrollbars
   (Michael Grant, issue 5351; Noam Stolero, issue 5350; Aung Myo Kyaw, issue
-  5098).
+  5098), and misplaced wrapped lines during partial redraws (Ben Maurer, issue
+  5625).
 
 * Do not crash looking for the next or previous session (issue 5344), or when
   no client is available.
 
+* Fix crashes when destroying a zoomed pane (Romain Francoise, issue 5591),
+  copying from a blank source pane (Kaixuan Li), or opening a mode prompt when
+  the client is offset into the window.
+
+* Avoid an infinite loop when assigning a width to WCHAR_MAX (issue 5602).
+
 CHANGES FROM 3.7b TO 3.7c
 
 * Build with jemalloc on macOS to avoid what appears to be a bug in calloc

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 \

cmd-join-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-join-pane.c,v 1.74 2026/08/03 20:29:52 nicm Exp $ */
+/* $OpenBSD: cmd-join-pane.c,v 1.75 2026/09/21 10:33:16 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 George Nachman <tmux@georgester.com>
@@ -133,7 +133,7 @@ cmd_join_pane_place(struct cmdq_item *item, struct winlink *wl,
 	} else if (strcmp(position, "back") == 0) {
 		TAILQ_REMOVE(&w->z_index, wp, zentry);
 		TAILQ_FOREACH(owp, &w->z_index, zentry) {
-			if (!window_pane_is_floating(owp))
+			if (!window_pane_is_floating_with_hidden(owp))
 				break;
 		}
 		if (owp != NULL)
@@ -142,24 +142,30 @@ cmd_join_pane_place(struct cmdq_item *item, struct winlink *wl,
 			TAILQ_INSERT_TAIL(&w->z_index, wp, zentry);
 	} else if (strcmp(position, "forward") == 0) {
 		owp = TAILQ_PREV(wp, window_panes_zindex, zentry);
+		while (owp != NULL && owp->layout_cell == NULL)
+			owp = TAILQ_PREV(owp, window_panes_zindex, zentry);
 		if (owp != NULL) {
 			TAILQ_REMOVE(&w->z_index, wp, zentry);
 			TAILQ_INSERT_BEFORE(owp, wp, zentry);
 		}
 	} else if (strcmp(position, "backward") == 0) {
 		owp = TAILQ_NEXT(wp, zentry);
+		while (owp != NULL && owp->layout_cell == NULL)
+			owp = TAILQ_NEXT(owp, zentry);
 		if (owp != NULL && window_pane_is_floating(owp)) {
 			TAILQ_REMOVE(&w->z_index, wp, zentry);
 			TAILQ_INSERT_AFTER(&w->z_index, owp, wp, zentry);
 		}
 	} else if (strcmp(position, "forward-loop") == 0) {
 		owp = TAILQ_PREV(wp, window_panes_zindex, zentry);
+		while (owp != NULL && owp->layout_cell == NULL)
+			owp = TAILQ_PREV(owp, window_panes_zindex, zentry);
 		TAILQ_REMOVE(&w->z_index, wp, zentry);
 		if (owp != NULL)
 			TAILQ_INSERT_BEFORE(owp, wp, zentry);
 		else {
 			TAILQ_FOREACH(owp, &w->z_index, zentry) {
-				if (!window_pane_is_floating(owp))
+				if (!window_pane_is_floating_with_hidden(owp))
 					break;
 			}
 			if (owp != NULL)
@@ -169,6 +175,8 @@ cmd_join_pane_place(struct cmdq_item *item, struct winlink *wl,
 		}
 	} else if (strcmp(position, "backward-loop") == 0) {
 		owp = TAILQ_NEXT(wp, zentry);
+		while (owp != NULL && owp->layout_cell == NULL)
+			owp = TAILQ_NEXT(owp, zentry);
 		if (owp != NULL && window_pane_is_floating(owp)) {
 			TAILQ_REMOVE(&w->z_index, wp, zentry);
 			TAILQ_INSERT_AFTER(&w->z_index, owp, wp, zentry);
@@ -347,8 +355,10 @@ cmd_join_pane_zindex(struct cmdq_item *item, struct winlink *wl,
 
 	n = 0;
 	TAILQ_FOREACH(owp, &w->z_index, zentry) {
-		if (!window_pane_is_floating(owp))
+		if (!window_pane_is_floating_with_hidden(owp))
 			break;
+		if (owp->layout_cell == NULL)
+			continue;
 		if (n >= z)
 			break;
 		n++;
@@ -443,7 +453,6 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 				cmdq_error(item, "pane is not floating");
 				return (CMD_RETURN_ERROR);
 			}
-			server_unzoom_window(dst_w);
 			if ((s = args_get(args, 'P')) != NULL)
 				return (cmd_join_pane_place(item, dst_wl, dst_wp, s));
 			if ((s = args_get(args, 'z')) != NULL)

cmd-queue.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-queue.c,v 1.123 2026/08/24 20:34:26 nicm Exp $ */
+/* $OpenBSD: cmd-queue.c,v 1.124 2026/09/22 06:46:50 nicm Exp $ */
 
 /*
  * Copyright (c) 2013 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -580,6 +580,9 @@ cmdq_fire_command(struct cmdq_item *item)
 	int			 flags, quiet = 0;
 	char			*tmp;
 
+	if (item->client != NULL && (item->client->flags & CLIENT_DEAD))
+		return (CMD_RETURN_ERROR);
+
 	if (cfg_finished)
 		cmdq_add_message(item);
 	if (log_get_level() > 1) {

cmd-resize-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-resize-pane.c,v 1.68 2026/08/31 07:44:39 nicm Exp $ */
+/* $OpenBSD: cmd-resize-pane.c,v 1.69 2026/09/21 10:33:16 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -91,7 +91,8 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 		server_redraw_window(w);
 		return (CMD_RETURN_NORMAL);
 	}
-	server_unzoom_window(w);
+	if (!window_pane_is_floating(wp))
+		server_unzoom_window(w);
 	lc = wp->layout_cell; /* may have been replaced by unzoom */
 
 	if (args_has(args, 'x')) {

cmd-run-shell.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-run-shell.c,v 1.94 2026/08/25 06:04:33 nicm Exp $ */
+/* $OpenBSD: cmd-run-shell.c,v 1.95 2026/09/20 07:59:55 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -164,7 +164,7 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 	if (cdata->client != NULL)
 		cdata->client->references++;
 	if (args_has(args, 'c'))
-		cdata->cwd = xstrdup(args_get(args, 'c'));
+		cdata->cwd = format_single_from_target(item, args_get(args, 'c'));
 	else
 		cdata->cwd = xstrdup(server_client_get_cwd(c, s));
 

cmd-wait-for.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-wait-for.c,v 1.23 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: cmd-wait-for.c,v 1.24 2026/09/22 06:46:50 nicm Exp $ */
 
 /*
  * Copyright (c) 2013 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -480,6 +480,40 @@ cmd_wait_for_unlock(struct cmdq_item *item, const char *name,
 	return (CMD_RETURN_NORMAL);
 }
 
+void
+cmd_wait_for_client_lost(struct client *c)
+{
+	struct wait_channel	*wc, *wc1;
+	struct wait_item	*wi, *wi1;
+	struct wait_event_item	*wei, *wei1;
+
+	TAILQ_FOREACH_SAFE(wei, &wait_event_items, entry, wei1) {
+		if (cmdq_get_client(wei->item) == c) {
+			TAILQ_REMOVE(&wait_event_items, wei, entry);
+			cmdq_continue(wei->item);
+			cmd_wait_for_event_free(wei);
+		}
+	}
+
+	RB_FOREACH_SAFE(wc, wait_channels, &wait_channels, wc1) {
+		TAILQ_FOREACH_SAFE(wi, &wc->waiters, entry, wi1) {
+			if (cmdq_get_client(wi->item) == c) {
+				cmdq_continue(wi->item);
+				TAILQ_REMOVE(&wc->waiters, wi, entry);
+				free(wi);
+			}
+		}
+		TAILQ_FOREACH_SAFE(wi, &wc->lockers, entry, wi1) {
+			if (cmdq_get_client(wi->item) == c) {
+				cmdq_continue(wi->item);
+				TAILQ_REMOVE(&wc->lockers, wi, entry);
+				free(wi);
+			}
+		}
+		cmd_wait_for_remove_empty(wc);
+	}
+}
+
 void
 cmd_wait_for_flush(void)
 {

configure.ac

@@ -1,6 +1,6 @@
 # configure.ac
 
-AC_INIT([tmux], next-3.9)
+AC_INIT([tmux], 3.8-rc2)
 AC_PREREQ([2.60])
 
 AC_CONFIG_AUX_DIR(etc)

format.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.417 2026/09/08 15:42:26 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.418 2026/09/20 08:19:31 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -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"));
@@ -2918,10 +2876,10 @@ format_cb_session_activity_flag(struct format_tree *ft)
 
 	if (ft->s != NULL) {
 		RB_FOREACH(wl, winlinks, &ft->s->windows) {
-			if (ft->wl->flags & WINLINK_ACTIVITY)
+			if (wl->flags & WINLINK_ACTIVITY)
 				return (xstrdup("1"));
-			return (xstrdup("0"));
 		}
+		return (xstrdup("0"));
 	}
 	return (NULL);
 }
@@ -2936,8 +2894,8 @@ format_cb_session_bell_flag(struct format_tree *ft)
 		RB_FOREACH(wl, winlinks, &ft->s->windows) {
 			if (wl->flags & WINLINK_BELL)
 				return (xstrdup("1"));
-			return (xstrdup("0"));
 		}
+		return (xstrdup("0"));
 	}
 	return (NULL);
 }
@@ -2950,10 +2908,10 @@ format_cb_session_silence_flag(struct format_tree *ft)
 
 	if (ft->s != NULL) {
 		RB_FOREACH(wl, winlinks, &ft->s->windows) {
-			if (ft->wl->flags & WINLINK_SILENCE)
+			if (wl->flags & WINLINK_SILENCE)
 				return (xstrdup("1"));
-			return (xstrdup("0"));
 		}
+		return (xstrdup("0"));
 	}
 	return (NULL);
 }
@@ -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
 	},

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

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);
-}

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;

key-bindings.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: key-bindings.c,v 1.192 2026/08/06 09:05:04 nicm Exp $ */
+/* $OpenBSD: key-bindings.c,v 1.193 2026/09/21 20:45:48 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -523,7 +523,7 @@ key_bindings_init(void)
 		"bind -n TripleClick1Pane { select-pane -t=; if -F '#{||:#{pane_in_mode},#{mouse_any_flag}}' { send -M } { copy-mode -H; send -X select-line; run -d0.3; send -X copy-pipe-and-cancel } }",
 
 		/* Mouse button 1 on border. */
-		"bind -n MouseDown1Border { select-pane -M }",
+		"bind -n MouseDown1Border { select-pane -t= }",
 
 		/* Mouse button 1 drag on border. */
 		"bind -n MouseDrag1Border { resize-pane -M }",

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. */

layout-custom.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: layout-custom.c,v 1.41 2026/09/09 09:01:19 nicm Exp $ */
+/* $OpenBSD: layout-custom.c,v 1.43 2026/09/22 06:48:01 nicm Exp $ */
 
 /*
  * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -283,26 +283,59 @@ layout_checksum(const char *layout)
 char *
 layout_dump(__unused struct window *w, struct layout_cell *lcroot, int flags)
 {
-	struct layout_string	 layout_string;
-	char			*out = NULL;
+	struct layout_string	 layout_string = { 0 };
+	char			*out;
 
 	if (lcroot == NULL)
-		return NULL;
-
+		goto bad;
 	layout_string_init(&layout_string);
-
-	if (layout_append(lcroot, &layout_string, flags) == 0) {
-		if (flags & LAYOUT_CUSTOM_OLD_FORMAT)
-			xasprintf(&out, "%04hx,%s",
-			    layout_checksum(layout_string.dat),
-			    layout_string.dat);
-		else
-			xasprintf(&out, "{\"V\":2,\"L\":%s}",
-			    layout_string.dat);
+	if (layout_append(lcroot, &layout_string, flags) != 0)
+		goto bad;
+	if (~flags & LAYOUT_CUSTOM_OLD_FORMAT)
+		xasprintf(&out, "{\"V\":2,\"L\":%s}", layout_string.dat);
+	else {
+		xasprintf(&out, "%04hx,%s", layout_checksum(layout_string.dat),
+		    layout_string.dat);
 	}
 	layout_string_free(&layout_string);
-
 	return (out);
+
+bad:
+	layout_string_free(&layout_string);
+	if (~flags & LAYOUT_CUSTOM_OLD_FORMAT)
+		return (NULL);
+	return (xstrdup("0000,"));
+}
+
+/* Get a floating pane cell's z-index in the layout being dumped. */
+static u_int
+layout_cell_zindex(struct layout_cell *lc)
+{
+	struct window_pane	*wp = lc->wp, *wq;
+	struct window		*w = wp->window;
+	struct layout_cell	*other;
+	int			 saved = (lc == wp->saved_layout_cell);
+	u_int			 i = 0;
+
+	if (saved &&
+	    w->active != NULL &&
+	    (w->active->flags & PANE_ZOOMED) &&
+	    (w->active->saved_layout_cell->flags & LAYOUT_CELL_FLOATING)) {
+		if (wp == w->active)
+			return (0);
+		i++;
+	}
+	TAILQ_FOREACH(wq, &w->z_index, zentry) {
+		if (wq == wp)
+			break;
+		if (saved)
+			other = wq->saved_layout_cell;
+		else
+			other = wq->layout_cell;
+		if (other != NULL && (other->flags & LAYOUT_CELL_FLOATING))
+			i++;
+	}
+	return (i);
 }
 
 /* Append information for a single cell in a JSON (v2) format. */
@@ -313,7 +346,7 @@ layout_append_v2(struct layout_cell *lc, struct layout_string *ls)
 	struct window_pane	*wp;
 	enum layout_type	 type;
 	char			 c;
-	u_int			 i, n;
+	u_int			 i, n, z;
 
 	if (lc == NULL)
 		return (-1);
@@ -354,9 +387,10 @@ layout_append_v2(struct layout_cell *lc, struct layout_string *ls)
 		if (window_pane_index(wp, &i) != 0)
 			return (-1);
 		layout_string_write(ls, ",\"i\":%u", i);
-		if ((lc->flags & LAYOUT_CELL_FLOATING) &&
-		    window_pane_zindex(wp, &i) == 0)
-			layout_string_write(ls, ",\"z\":%u", i);
+		if (lc->flags & LAYOUT_CELL_FLOATING) {
+			z = layout_cell_zindex(lc);
+			layout_string_write(ls, ",\"z\":%u", z);
+		}
 		layout_string_write(ls, ",\"I\":\"%%%u\"", wp->id);
 	}
 

layout.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: layout.c,v 1.100 2026/09/11 08:16:14 nicm Exp $ */
+/* $OpenBSD: layout.c,v 1.101 2026/09/20 08:42:46 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1728,7 +1728,7 @@ layout_floating_args_parse(struct cmdq_item *item, struct args *args,
     enum pane_lines lines, struct window *w, struct layout_geometry *lg,
     char **cause)
 {
-	int	 sx, sy, ox, oy;
+	int	 sx, sy, ox, oy, pad;
 	char	*error = NULL;
 
 	sx = lg->sx == UINT_MAX ? w->sx / 2 : lg->sx;
@@ -1777,12 +1777,20 @@ layout_floating_args_parse(struct cmdq_item *item, struct args *args,
 		}
 	}
 
+	if (!window_has_floating_panes(w)) {
+		w->last_new_pane_x = 0;
+		w->last_new_pane_y = 0;
+	}
 	if (ox == INT_MAX) {
 		if (w->last_new_pane_x == 0)
 			ox = 4;
 		else {
+			if (lines != PANE_LINES_NONE)
+				pad = 1;
+			else
+				pad = 0;
 			ox = w->last_new_pane_x + 4;
-			if (w->last_new_pane_x > w->sx)
+			if (ox + sx + pad > (int)w->sx)
 				ox = 4;
 		}
 		w->last_new_pane_x = ox;
@@ -1793,8 +1801,12 @@ layout_floating_args_parse(struct cmdq_item *item, struct args *args,
 		if (w->last_new_pane_y == 0)
 			oy = 2;
 		else {
+			if (lines != PANE_LINES_NONE)
+				pad = 1;
+			else
+				pad = 0;
 			oy = w->last_new_pane_y + 2;
-			if (w->last_new_pane_y > w->sy)
+			if (oy + sy + pad > (int)w->sy)
 				oy = 2;
 		}
 		w->last_new_pane_y = oy;

options-table.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.246 2026/09/11 10:17:16 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.245 2026/09/10 11:02:18 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -76,8 +76,7 @@ static const char *options_table_pane_border_indicators_list[] = {
 	"off", "colour", "arrows", "both", NULL
 };
 static const char *options_table_pane_border_lines_list[] = {
-	"single", "double", "heavy", "simple", "number", "spaces", "none",
-	"rounded", NULL
+	"single", "double", "heavy", "simple", "number", "spaces", "none", NULL
 };
 static const char *options_table_popup_border_lines_list[] = {
 	"single", "double", "heavy", "simple", "rounded", "padded", "none", NULL
@@ -104,7 +103,7 @@ 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

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)

regress/Makefile

@@ -1,33 +1,17 @@
 TESTS!= echo *.sh
 LOGDIR=logs
 
-.PHONY: all
-.NOTPARALLEL: all
+.PHONY: all prepare $(TESTS)
 
-all:
-	@mkdir -p "$(LOGDIR)"; \
-	rm -f "$(LOGDIR)"/*.log; \
-	failed=0; failures=; \
+all: prepare $(TESTS)
+	@failed=0; failures=; \
 	for test in $(TESTS); do \
 		base=$${test##*/}; \
 		log="$(LOGDIR)/$${base%.sh}.log"; \
-		rm -f "$$log"; \
-		printf '%-40s ' "$$test"; \
-		start=$$(date +%s); \
-		env -i LC_CTYPE=C.UTF-8 MallocNanoZone=0 \
-		    sh -x "$$test" >"$$log" 2>&1; \
-		if [ $$? -eq 0 ]; then \
-			end=$$(date +%s); \
-			rm -f "$$log"; \
-			echo "PASS ($$((end - start))s)"; \
-		else \
-			end=$$(date +%s); \
-			echo "FAIL ($$((end - start))s)"; \
-			echo " log: $$log"; \
+		if [ -f "$$log" ]; then \
 			failed=1; \
 			failures="$$failures $$test"; \
 		fi; \
-		sleep 1; \
 	done; \
 	if [ "$$failed" -ne 0 ]; then \
 		echo; \
@@ -39,3 +23,22 @@ all:
 		rmdir "$(LOGDIR)" 2>/dev/null || true; \
 	fi; \
 	exit $$failed
+
+prepare:
+	@mkdir -p "$(LOGDIR)"
+	@rm -f "$(LOGDIR)"/*.log
+
+$(TESTS): prepare
+	@base="$@"; base=$${base##*/}; \
+	log="$(LOGDIR)/$${base%.sh}.log"; \
+	start=$$(date +%s); \
+	if env -i LC_CTYPE=C.UTF-8 MallocNanoZone=0 \
+	    sh -x "$@" >"$$log" 2>&1; then \
+		end=$$(date +%s); \
+		rm -f "$$log"; \
+		printf '%-40s PASS (%ss)\n' "$@" "$$((end - start))"; \
+	else \
+		end=$$(date +%s); \
+		printf '%-40s FAIL (%ss)\n log: %s\n' \
+		    "$@" "$$((end - start))" "$$log"; \
+	fi

regress/alerts.sh

@@ -2,8 +2,9 @@
 
 # monitor-activity, monitor-bell and monitor-silence: both the
 # alert-activity, alert-bell and alert-silence hooks and the winlink alert
-# flags (window_activity_flag, window_bell_flag, window_silence_flag and
-# the #, !, ~ characters in window_flags). The sessions are detached so
+# flags (window_activity_flag, window_bell_flag, window_silence_flag,
+# their session equivalents and the #, !, ~ characters in window_flags).
+# The sessions are detached so
 # alert flags are set even on the current window; the *-action options
 # still decide whether the hooks fire. Panes run cat: activity is
 # generated by the tty echo of send-keys and a bell by sending a BEL and
@@ -111,6 +112,24 @@ flags_have()
 	esac
 }
 
+assert_session_flag()
+{
+	flag="#{session_${1}_flag}"
+	expected=$2
+
+	# Only mon exists here. Check both window contexts and list-sessions.
+	for target in mon:w0 "mon:$3"; do
+		value=$($TMUX display -pt "$target" "$flag") ||
+			fail "display $flag failed"
+		[ "$value" = "$expected" ] ||
+			fail "expected $flag for $target to be '$expected' but got '$value'"
+	done
+	value=$($TMUX list-sessions -F "$flag") ||
+		fail "list-sessions $flag failed"
+	[ "$value" = "$expected" ] ||
+		fail "expected list-sessions $flag to be '$expected' but got '$value'"
+}
+
 flags_lack()
 {
 	target=$1
@@ -150,10 +169,12 @@ $TMUX set-hook -g alert-silence \
 # alert-bell and sets the bell flag, shown as ! in window_flags.
 $TMUX neww -d -t mon: -n bellw cat || fail "new-window bellw failed"
 assert_fmt_unchanged mon:bellw '#{window_bell_flag}' 0
+assert_session_flag bell 0 bellw
 flags_lack mon:bellw '!'
 bell mon:bellw
 wait_for @log '|alert-bell:mon:bellw'
 wait_for_fmt mon:bellw '#{window_bell_flag}' 1
+assert_session_flag bell 1 bellw
 flags_have mon:bellw '!'
 
 # Bells are not deduplicated: a second bell fires the hook again even
@@ -164,6 +185,7 @@ wait_for @log '|alert-bell:mon:bellw|alert-bell:mon:bellw'
 # Selecting the window clears the alert flags.
 $TMUX selectw -t mon:bellw || fail "select-window bellw failed"
 wait_for_fmt mon:bellw '#{window_bell_flag}' 0
+assert_session_flag bell 0 bellw
 flags_lack mon:bellw '!'
 $TMUX selectw -t mon:w0 || fail "select-window w0 failed"
 
@@ -173,6 +195,7 @@ $TMUX set -g @log '' || fail "reset @log failed"
 bell mon:w0
 wait_for @log '|alert-bell:mon:w0'
 wait_for_fmt mon:w0 '#{window_bell_flag}' 1
+assert_session_flag bell 1 bellw
 $TMUX selectw -t mon:bellw || fail "select-window bellw failed"
 $TMUX selectw -t mon:w0 || fail "select-window w0 failed"
 wait_for_fmt mon:w0 '#{window_bell_flag}' 0
@@ -199,6 +222,7 @@ $TMUX neww -d -t mon: -n actw cat || fail "new-window actw failed"
 $TMUX set -g @log '' || fail "reset @log failed"
 activity mon:actw
 assert_fmt_unchanged mon:actw '#{window_activity_flag}' 0
+assert_session_flag activity 0 actw
 assert_unchanged @log ''
 
 # With monitor-activity on, output fires alert-activity and sets the
@@ -208,6 +232,7 @@ $TMUX set -wt mon:actw monitor-activity on ||
 activity mon:actw
 wait_for @log '|alert-activity:mon:actw'
 wait_for_fmt mon:actw '#{window_activity_flag}' 1
+assert_session_flag activity 1 actw
 flags_have mon:actw '#'
 
 # While the flag is set further activity does not fire the hook again.
@@ -234,6 +259,7 @@ exec 3>"$OUT/fifo"
 wait_for_fmt mon: '#{session_attached}' 1
 $TMUX selectw -t mon:actw || fail "select-window actw failed"
 wait_for_fmt mon:actw '#{window_activity_flag}' 0
+assert_session_flag activity 0 actw
 flags_lack mon:actw '#'
 $TMUX selectw -t mon:w0 || fail "select-window w0 failed"
 exec 3>&-
@@ -250,6 +276,7 @@ $TMUX set -wt mon:w0 monitor-activity on ||
 $TMUX set -g @log '' || fail "reset @log failed"
 activity mon:w0
 wait_for_fmt mon:w0 '#{window_activity_flag}' 1
+assert_session_flag activity 1 actw
 assert_unchanged @log ''
 $TMUX set -wut mon:w0 monitor-activity ||
 	fail "unset monitor-activity w0 failed"
@@ -273,16 +300,19 @@ $TMUX selectw -t mon:w0 || fail "select-window w0 failed"
 # running.
 $TMUX neww -d -t mon: -n silw cat || fail "new-window silw failed"
 assert_fmt_unchanged mon:silw '#{window_silence_flag}' 0
+assert_session_flag silence 0 silw
 $TMUX set -g @log '' || fail "reset @log failed"
 $TMUX set -wt mon:silw monitor-silence 1 || fail "set monitor-silence failed"
 wait_for @log '|alert-silence:mon:silw'
 wait_for_fmt mon:silw '#{window_silence_flag}' 1
+assert_session_flag silence 1 silw
 flags_have mon:silw '~'
 assert_unchanged @log '|alert-silence:mon:silw'
 $TMUX set -wt mon:silw monitor-silence 0 ||
 	fail "reset monitor-silence failed"
 $TMUX selectw -t mon:silw || fail "select-window silw failed"
 wait_for_fmt mon:silw '#{window_silence_flag}' 0
+assert_session_flag silence 0 silw
 flags_lack mon:silw '~'
 $TMUX selectw -t mon:w0 || fail "select-window w0 failed"
 

regress/codepoint-widths.sh

@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# Width cache ranges must include their endpoint without overflowing wchar_t.
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+SERVER=
+WATCHDOG=
+
+cleanup()
+{
+	if [ -n "$WATCHDOG" ]; then
+		kill "$WATCHDOG" 2>/dev/null
+		wait "$WATCHDOG" 2>/dev/null
+	fi
+	[ -n "$SERVER" ] && kill -9 "$SERVER" 2>/dev/null
+}
+trap cleanup 0
+trap 'exit 1' 1 2 15
+
+$TMUX new-session -d 'exec sleep 60' || exit 1
+SERVER=$($TMUX display-message -p '#{pid}') || exit 1
+
+# kill-server cannot stop a server stuck rebuilding the width cache.
+(
+	sleep 5
+	kill -9 "$SERVER" 2>/dev/null
+) &
+WATCHDOG=$!
+
+$TMUX set -g codepoint-widths 'U+1F600=2' || exit 1
+
+# Cover both signed and unsigned 32-bit wchar_t. Values above WCHAR_MAX
+# are ignored by the parser on platforms where they cannot be represented.
+for value in U+7FFFFFFF=1 U+7FFFFFFE-U+7FFFFFFF=2 \
+    U+FFFFFFFF=1 U+FFFFFFFE-U+FFFFFFFF=2; do
+	$TMUX set -g codepoint-widths "$value" || exit 1
+	[ "$($TMUX display-message -p alive)" = alive ] || exit 1
+done
+
+# Check that an ordinary range still includes both endpoints and stops there.
+$TMUX set -g codepoint-widths 'U+03B1-U+03B3=2' || exit 1
+$TMUX set -g @text 'αβγδ' || exit 1
+[ "$($TMUX display-message -p '#{w:@text}')" = 7 ] || exit 1
+$TMUX set -gu codepoint-widths || exit 1
+[ "$($TMUX display-message -p '#{w:@text}')" = 4 ] || exit 1
+
+$TMUX kill-server || exit 1
+SERVER=
+exit 0

regress/control-client-exit-stalled.sh

@@ -17,7 +17,7 @@ PATH=/bin:/usr/bin
 TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-TMUX="$TEST_TMUX -Ltest"
+TMUX="$TEST_TMUX -Ltest$$"
 $TMUX kill-server 2>/dev/null
 
 DIR=$(mktemp -d)

regress/control-client-exit.sh

@@ -19,7 +19,7 @@ PATH=/bin:/usr/bin
 TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-TMUX="$TEST_TMUX -Ltest"
+TMUX="$TEST_TMUX -Ltest$$"
 $TMUX kill-server 2>/dev/null
 
 DIR=$(mktemp -d)

regress/control-client-run-shell-exit.sh

@@ -10,7 +10,7 @@ PATH=/bin:/usr/bin
 TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-TMUX="$TEST_TMUX -Ltest"
+TMUX="$TEST_TMUX -Ltest$$"
 $TMUX kill-server 2>/dev/null
 
 OUT=$(mktemp)

regress/control-client-wait-exit.sh

@@ -10,7 +10,7 @@ PATH=/bin:/usr/bin
 TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-TMUX="$TEST_TMUX -Ltest"
+TMUX="$TEST_TMUX -Ltest$$"
 $TMUX kill-server 2>/dev/null
 
 FIFO=$(mktemp -u)

regress/display-panes.sh

@@ -153,11 +153,13 @@ wait_format "$p0" '#{pane_in_mode}' '0'
 wait_option @picked "$p1"
 
 # Commands after display-panes run immediately while the mode remains.
+# Record the mode in the same command queue so client startup cannot race
+# the 500ms timeout.
 $TMUX set -g @after none || fail "set @after failed"
-$TMUX display-panes -Nd 500 -t "$p0" \; set -g @after fast ||
+$TMUX display-panes -Nd 500 -t "$p0" \; \
+    set -gF -t "$p0" @after '#{pane_mode}' ||
 	fail "display-panes immediate command failed"
-wait_option @after fast
-wait_format "$p0" '#{pane_mode}' 'panes-mode'
+wait_option @after 'panes-mode'
 wait_format "$p0" '#{pane_in_mode}' '0'
 
 # Existing zoom is restored on exit.

regress/floating-pane-zoom.sh

@@ -0,0 +1,158 @@
+#!/bin/sh
+
+# Moving, resizing and reordering an over-zoom float must leave the tiled
+# pane zoomed, and the changes must survive an explicit unzoom.
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+trap '$TMUX kill-server 2>/dev/null' 0
+trap 'exit 1' 1 2 15
+
+fail()
+{
+	echo "$*" >&2
+	exit 1
+}
+
+run()
+{
+	$TMUX "$@" || fail "failed: $*"
+}
+
+check()
+{
+	got=$(run display-message -p -t "$1" "$2") || exit 1
+	[ "$got" = "$3" ] || fail "$1 $2: got '$got', expected '$3'"
+}
+
+check_zoom()
+{
+	check "$base" '#{window_zoomed_flag}:#{pane_zoomed_flag}' '1:1'
+	check "$float" '#{pane_floating_flag}:#{pane_active}' "1:$active"
+	check "$base" '#{@unzoomed}' ''
+}
+
+run new-session -d -x 80 -y 24
+base=$(run display-message -p '#{pane_id}') || exit 1
+other=$(run split-window -dPF '#{pane_id}') || exit 1
+layout=$(run display-message -p '#{window_layout}') || exit 1
+run set-hook -g window-unzoomed 'set -g @unzoomed 1'
+
+# Cover creation before and after zoom, with both the float and the tiled
+# pane active. Modal panes use the same over-zoom flag.
+for mode in before after detached modal; do
+	if [ "$mode" != before ]; then
+		run resize-pane -Z -t "$base"
+	fi
+	case "$mode" in
+	detached) flags=-Ad; active=0 ;;
+	modal) flags=-O; active=1 ;;
+	*) flags=-A; active=1 ;;
+	esac
+	float=$(run new-pane "$flags" -PF '#{pane_id}' -t "$base" \
+	    -x 20 -y 8 -X 8 -Y 3 '') || exit 1
+	if [ "$mode" = before ]; then
+		run resize-pane -Z -t "$base"
+	fi
+	run set -gu @unzoomed
+	check_zoom
+
+	run move-pane -t "$float" -D
+	check "$float" '#{pane_top}' 5
+	check_zoom
+	run move-pane -t "$float" -U 2 -R 3 -L 1
+	check "$float" '#{pane_left}:#{pane_top}' '11:3'
+	check_zoom
+	run move-pane -t "$float" -X 25% -Y 25%
+	check "$float" '#{pane_left}:#{pane_top}' '21:7'
+	check_zoom
+	run move-pane -t "$float" -P bottom-right
+	check "$float" '#{pane_left}:#{pane_top}' '61:17'
+	check_zoom
+	run resize-pane -t "$float" -x 30 -y 10
+	check "$float" '#{pane_width}:#{pane_height}' '28:8'
+	check_zoom
+	run resize-pane -t "$float" -U 1 -L 2
+	check "$float" '#{pane_left}:#{pane_top}:#{pane_width}:#{pane_height}' \
+	    '59:16:30:9'
+	check_zoom
+	run move-pane -t "$float" -P centre
+	check "$float" '#{pane_left}:#{pane_top}' '25:7'
+	check_zoom
+
+	# Failed commands must not change zoom either.
+	for command in 'move-pane -D invalid' 'move-pane -P invalid' \
+	    'move-pane -z invalid' 'resize-pane -x invalid' \
+	    'resize-pane -D invalid'; do
+		$TMUX $command -t "$float" 2>/dev/null &&
+		    fail "unexpected success: $command"
+		check_zoom
+	done
+
+	run resize-pane -Z -t "$base"
+	check "$float" '#{pane_left}:#{pane_top}:#{pane_width}:#{pane_height}' \
+	    '25:7:30:9'
+	run kill-pane -t "$float"
+	check "$base" '#{window_layout}' "$layout"
+done
+
+# Put an ordinary (hidden while zoomed) float between two over-zoom floats
+# in the stacking order. Reordering must skip it when counting visible
+# positions, but keep all floats ahead of the tiled panes after unzoom.
+back=$(run new-pane -AdPF '#{pane_id}' -t "$base" '') || exit 1
+hidden=$(run new-pane -dPF '#{pane_id}' -t "$base" '') || exit 1
+float=$(run new-pane -AdPF '#{pane_id}' -t "$base" '') || exit 1
+active=0
+run resize-pane -Z -t "$base"
+run set -gu @unzoomed
+
+for position in backward back forward-loop; do
+	run move-pane -t "$float" -P front
+	run move-pane -t "$float" -P "$position"
+	check "$float" '#{pane_z}' 1
+	check "$back" '#{pane_z}' 0
+	check_zoom
+done
+for position in forward front backward-loop; do
+	run move-pane -t "$float" -P back
+	run move-pane -t "$float" -P "$position"
+	check "$float" '#{pane_z}' 0
+	check "$back" '#{pane_z}' 1
+	check_zoom
+done
+for z in 1 0 99; do
+	run move-pane -t "$float" -z "$z"
+	want=$z
+	[ "$z" = 99 ] && want=1
+	check "$float" '#{pane_z}' "$want"
+	check_zoom
+done
+run resize-pane -Z -t "$base"
+check "$float" '#{pane_z}' 2
+check "$base" '#{pane_z}' 4
+run kill-pane -t "$hidden"
+run kill-pane -t "$back"
+
+# Explicit zoom toggling and operations on tiled panes retain their
+# existing behaviour. The over-zoom flag alone does not make a pane a float:
+# zooming the float itself gives it a tiled cell until unzoom.
+run resize-pane -Z -t "$float"
+check "$float" '#{pane_zoomed_flag}:#{pane_floating_flag}' '1:0'
+run resize-pane -t "$float" -x 25
+check "$float" '#{window_zoomed_flag}:#{pane_floating_flag}:#{pane_width}' \
+    '0:1:23'
+run resize-pane -Z -t "$base"
+run resize-pane -t "$other" -D 1
+check "$base" '#{window_zoomed_flag}' 0
+
+# A hidden ordinary float must still be unzoomed before resizing it.
+hidden=$(run new-pane -dPF '#{pane_id}' -t "$base" '') || exit 1
+run resize-pane -Z -t "$base"
+run resize-pane -t "$hidden" -x 25
+check "$hidden" '#{window_zoomed_flag}:#{pane_floating_flag}:#{pane_width}' \
+    '0:1:23'
+
+exit 0

regress/format-fuzzy.sh

@@ -7,6 +7,8 @@ TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
 TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+trap '$TMUX kill-server 2>/dev/null' 0
+trap 'exit 1' 1 2 15
 
 # test_format $format $expected_result
 test_format()

regress/format-modifiers.sh

@@ -18,6 +18,24 @@ export TZ LANG LC_ALL
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
 TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+FIFO1="${TMPDIR:-/tmp}/fmt-l-$$-1"
+FIFO2="${TMPDIR:-/tmp}/fmt-l-$$-2"
+HOLD1=
+HOLD2=
+CC1=
+CC2=
+
+cleanup()
+{
+	for pid in $HOLD1 $HOLD2 $CC1 $CC2; do
+		kill "$pid" 2>/dev/null
+		wait "$pid" 2>/dev/null
+	done
+	$TMUX kill-server 2>/dev/null
+	rm -f "$FIFO1" "$FIFO2"
+}
+trap cleanup 0
+trap 'exit 1' 1 2 15
 
 ESC=$(printf '\033')
 
@@ -579,8 +597,6 @@ assert_alive "verbose loop expansion"
 
 # L loops over attached clients.  Attach two control-mode clients, each held
 # open by a background process keeping a FIFO's write end open.
-FIFO1="${TMPDIR:-/tmp}/fmt-l-$$-1"
-FIFO2="${TMPDIR:-/tmp}/fmt-l-$$-2"
 rm -f "$FIFO1" "$FIFO2"
 mkfifo "$FIFO1" "$FIFO2" || exit 1
 # Hold the write ends open so the control clients stay attached.
@@ -605,9 +621,9 @@ test_format "#{L/nr:x}" "xx"
 test_format "#{L/r:x}" "xx"
 # Now detach one and confirm the count drops to one.
 kill $HOLD2 2>/dev/null
+wait $HOLD2 2>/dev/null
+HOLD2=
 sleep 1
 test_format "#{L:x}" "x"
-kill $HOLD1 $CC1 $CC2 2>/dev/null
-rm -f "$FIFO1" "$FIFO2"
 
 exit 0

regress/format-strings.sh

@@ -7,6 +7,8 @@ TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
 TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+trap '$TMUX kill-server 2>/dev/null' 0
+trap 'exit 1' 1 2 15
 
 # test_format $format $expected_result
 test_format()

regress/hooks-lifecycle.sh

@@ -76,14 +76,14 @@ $TMUX set-hook -g session-closed \
 	fail "set-hook session-closed failed"
 
 # The only pane of the only window of a session exits: pane-exited, then
-# window-unlinked, then session-closed, each seeing the dead object in the
+# session-closed, then window-unlinked, each seeing the dead object in the
 # hook formats.
 pane=$($TMUX new -d -s doomed -n dwin -P -F '#{pane_id}' 'true') ||
 	fail "new-session doomed failed"
 wait_for @log \
-	"|pane-exited:$pane|window-unlinked:doomed:dwin|session-closed:doomed"
+	"|pane-exited:$pane|session-closed:doomed|window-unlinked:doomed:dwin"
 assert_unchanged @log \
-	"|pane-exited:$pane|window-unlinked:doomed:dwin|session-closed:doomed"
+	"|pane-exited:$pane|session-closed:doomed|window-unlinked:doomed:dwin"
 
 # The dead pane, window and session cannot be used as targets but the
 # server survives.
@@ -110,14 +110,14 @@ $TMUX set-hook -g pane-exited \
 	'set -gF @log "#{@log}|pane-exited:#{hook_pane}"' ||
 	fail "restore pane-exited hook failed"
 
-# kill-window on the last window: window-unlinked then session-closed but
+# kill-window on the last window: session-closed then window-unlinked but
 # no pane-exited for the panes in the killed window.
 $TMUX set -g @log '' || fail "reset @log failed"
 $TMUX new -d -s doomed2 -n dwin2 || fail "new-session doomed2 failed"
 $TMUX splitw -d -t doomed2:0 || fail "split-window doomed2 failed"
 $TMUX kill-window -t doomed2:0 || fail "kill-window failed"
-wait_for @log '|window-unlinked:doomed2:dwin2|session-closed:doomed2'
-assert_unchanged @log '|window-unlinked:doomed2:dwin2|session-closed:doomed2'
+wait_for @log '|session-closed:doomed2|window-unlinked:doomed2:dwin2'
+assert_unchanged @log '|session-closed:doomed2|window-unlinked:doomed2:dwin2'
 $TMUX has -t main || fail "server died after kill-window chain"
 
 # kill-session: session-closed fires first, then window-unlinked for its

regress/if-shell-error.sh

@@ -12,7 +12,8 @@ $TMUX kill-server 2>/dev/null
 
 TMP=$(mktemp)
 OUT=$(mktemp)
-trap "rm -f $TMP $OUT" 0 1 15
+trap 'rm -f "$TMP" "$OUT"; $TMUX kill-server 2>/dev/null' 0
+trap 'exit 1' 1 2 15
 
 cat <<EOF >$TMP
 if 'true' 'wibble wobble'

regress/input-common.inc

@@ -4,6 +4,9 @@ TERM=screen
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
 TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
 
+# Keep panes alive until the next case or cleanup, without reading replies.
+INPUT_HOLD='while :; do sleep 3600; done'
+
 TMP=$(mktemp)
 EXP=$(mktemp)
 trap 'rm -f "$TMP" "$EXP"; $TMUX kill-server 2>/dev/null' 0 1 15
@@ -37,10 +40,10 @@ start_pane_hlimit()
 
 	$TMUX kill-server 2>/dev/null
 	sleep 0.1
-	$TMUX new-session -d -x 1 -y 1 -s test-setup "sleep 2" || exit 1
+	$TMUX new-session -d -x 1 -y 1 -s test-setup "$INPUT_HOLD" || exit 1
 	$TMUX set-option -g history-limit "$hlimit" || exit 1
 	$TMUX new-session -d -x "$sx" -y "$sy" -s "$name" \
-	    "printf '$seq'; sleep 2" || exit 1
+	    "printf '$seq'; $INPUT_HOLD" || exit 1
 	$TMUX kill-session -t test-setup
 	sleep 0.3
 }

regress/input-keys.sh

@@ -22,7 +22,19 @@ assert_key () {
 	      clear-history -t$W \; \
 	      send-keys -t$W "$key" 'EOL' || exit 1
 
-	actual_code=$($TMUX capturep -pt$W | \
+	# cat echoes the keys back asynchronously, so wait for the EOL marker
+	# to reach the pane instead of capturing straight away.
+	i=0
+	while [ $i -lt 50 ]; do
+		screen=$($TMUX capturep -pt$W)
+		case "$screen" in
+		*EOL*) break ;;
+		esac
+		i=$((i + 1))
+		sleep 0.1
+	done
+
+	actual_code=$(printf '%s\n' "$screen" | \
 			      head -1 | \
 			      sed -e 's/EOL.*$//')
 

regress/input-malformed.sh

@@ -2,6 +2,38 @@
 
 . ./input-common.inc
 
+# Wait for the terminator and following text to reach the parser.
+check_discard()
+{
+	name=$1
+	printf 'OK\n' >"$EXP"
+	i=0
+	while [ "$i" -lt 300 ]; do
+		capture_grid "$name" >"$TMP"
+		cmp -s "$TMP" "$EXP" && return 0
+		sleep 0.05
+		i=$((i + 1))
+	done
+	fail "$name (timed out waiting for discard)"
+}
+
+# The missing-terminator timer may expire before the string limit is reached
+# on a slow build. Clear any payload printed after the timeout, then check
+# that the string did not change the title and normal output has resumed.
+test_discard()
+{
+	name=$1
+	prefix=$2
+	start_cmd "$name" 8 3 "$INPUT_HOLD"
+	$TMUX select-pane -T discard-test || exit 1
+	$TMUX respawn-pane -k \
+	    "perl -e 'print qq{$prefix}, q{x} x 1100000, qq{\e\\\\\e[H\e[2JOK}'; $INPUT_HOLD" || exit 1
+	check_discard "$name"
+	$TMUX display-message -p -t "$name:" '#{pane_title}' >"$TMP" || exit 1
+	printf 'discard-test\n' >"$EXP"
+	cmp "$TMP" "$EXP" || fail "$name title"
+}
+
 start_cmd csi-param-discard 8 3 \
     "perl -e 'print qq{\e[}, q{1} x 80, qq{\030OK}'; sleep 2"
 check_capture csi-param-discard 'OK'
@@ -10,13 +42,8 @@ start_cmd csi-interm-discard 8 3 \
     "perl -e 'print qq{\e[    \030OK}'; sleep 2"
 check_capture csi-interm-discard 'OK'
 
-start_cmd osc-discard 8 3 \
-    "perl -e 'print qq{\e]2;}, q{x} x 1100000, qq{\e\\\\OK}'; sleep 2"
-check_capture osc-discard 'OK'
-
-start_cmd apc-discard 8 3 \
-    "perl -e 'print qq{\e_}, q{x} x 1100000, qq{\e\\\\OK}'; sleep 2"
-check_capture apc-discard 'OK'
+test_discard osc-discard '\e]2;'
+test_discard apc-discard '\e_'
 
 start_pane unknown-csi 8 3 '\033[?9999zOK'
 check_capture unknown-csi 'OK'

regress/input-scroll.sh

@@ -51,7 +51,7 @@ $TMUX kill-server 2>/dev/null
 sleep 0.1
 $TMUX new-session -d -x 5 -y 3 -s history \; \
     set-option -g history-limit 3 \; \
-    respawn-pane -k "printf '01\n02\n03\n04\n05\n06'; sleep 2" || exit 1
+    respawn-pane -k "printf '01\n02\n03\n04\n05\n06'; $INPUT_HOLD" || exit 1
 sleep 0.3
 $TMUX capture-pane -pN -t history: -S - -E - | normalize_capture >"$TMP"
 printf "%s\n" '01

regress/kill-session-zoomed.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# Killing a session whose window is zoomed must not crash the server:
+# window_destroy used to unzoom the window, which resized the panes and
+# fired pane-resized with the window in the payload, and releasing that
+# reference destroyed the window a second time.
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+$TMUX kill-server 2>/dev/null
+
+$TMUX -f/dev/null new -d -sfoo || exit 1
+$TMUX split-window -d -h -tfoo:0 || exit 1
+$TMUX resize-pane -Z -tfoo:0 || exit 1
+$TMUX new -d -sbar || exit 1
+$TMUX kill-session -tfoo || exit 1
+$TMUX has-session -tbar || exit 1
+
+# The same with the zoomed window in a session killed by kill-server.
+$TMUX new -d -sbaz || exit 1
+$TMUX split-window -d -v -tbaz:0 || exit 1
+$TMUX resize-pane -Z -tbaz:0 || exit 1
+$TMUX kill-server || exit 1
+
+exit 0

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

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

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

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

regress/layout-custom.sh

@@ -50,7 +50,8 @@
 #   layout it names is a single cell or a split;
 # - a window whose only tiled pane has been killed, which leaves it with a
 #   floating cell as its layout root or with a root node holding nothing but
-#   floating cells, producing no v1 dump at all, and being parsed as v1;
+#   floating cells, producing an empty v1 body with a checksum, and being
+#   parsed as v1;
 # - the %layout-change notification, in both formats at once: two control
 #   clients watching one layout change, only one of which has asked for new
 #   layouts, and the number of notifications a change produces in each format;
@@ -376,10 +377,7 @@ must_equal 'Layout after select-pane back' "$(layout L:two)" "$SPLIT"
 
 # With nothing zoomed the two layout formats agree.
 #
-# The zoomed case is deliberately not covered here. While a pane is zoomed
-# #{window_layout} dumps the saved (unzoomed) layout and
-# #{window_visible_layout} the zoomed one, but that depends on how zooming
-# stashes the layout root rather than on anything in layout-custom.c.
+# Zoomed layouts are checked below with floating panes.
 must_equal 'Visible layout' "$(visible_layout L:two)" "$SPLIT"
 
 # ---------------------------------------------------------------------------
@@ -703,6 +701,42 @@ must_contain 'Floating layout back z-index' "$floating" '"z":1'
 check_ok select-layout -t L:float "$floating"
 must_equal 'Floating layout after round trip' "$(raw_layout L:float)" "$floating"
 
+# A dump taken while zoomed must retain the unzoomed floating z-indexes.
+# Check hidden floats, floats above zoom, and a mixture of the two.
+for flags in '' A mixed; do
+	check_ok new-window -d -t L: -n zoom
+	zt=$($TMUX display-message -p -t L:zoom '#{pane_id}')
+	check_ok split-window -d -h -t "$zt"
+	case "$flags" in
+	A|mixed) first=-Ad ;;
+	*) first=-d ;;
+	esac
+	case "$flags" in
+	A) second=-Ad ;;
+	*) second=-d ;;
+	esac
+	check_ok new-pane "$first" -t "$zt" -x 20 -y 6 ''
+	check_ok new-pane "$second" -t "$zt" -x 30 -y 8 ''
+	for pane in 0 2 3; do
+		check_ok select-pane -t "L:zoom.$pane"
+		before=$(raw_layout L:zoom)
+		legacy=$(v1_layout L:zoom)
+		check_ok resize-pane -Z -t "L:zoom.$pane"
+		during=$(raw_layout L:zoom)
+		must_equal 'Layout while zoomed' "$during" "$before"
+		must_equal 'Legacy layout while zoomed' \
+		    "$(v1_layout L:zoom)" "$legacy"
+		must_equal 'Zoom after dumping layout' \
+		    "$($TMUX display-message -p -t L:zoom '#{window_zoomed_flag}')" 1
+		must_differ 'Visible layout while zoomed' \
+		    "$(visible_layout L:zoom)" "$(layout L:zoom)"
+		check_ok select-layout -t L:zoom "$during"
+		must_equal 'Round trip from zoomed layout' \
+		    "$(raw_layout L:zoom)" "$before"
+	done
+	check_ok kill-window -t L:zoom
+done
+
 # ---------------------------------------------------------------------------
 # Floating panes and the legacy (v1) format.
 #
@@ -838,12 +872,12 @@ must_equal 'Panes left with one floating pane' \
 	"$($TMUX display-message -p -t L:gone1 '#{window_panes}')" '1'
 
 # The floating cell is the root and there is nothing tiled under it, so there is
-# no v1 dump to make. In particular the floating cell must not be written out on
+# only an empty v1 body to dump. The floating cell must not be written out on
 # its own, which would be a layout claiming the window is the size and position
 # of the floating pane with no pane in it at all.
 got=$(v1_layout L:gone1)
 check_ok display-message -p alive
-must_equal 'v1 dump with one floating pane and no tiled panes' "$got" ''
+must_equal 'v1 dump with one floating pane and no tiled panes' "$got" '0000,'
 
 # Two floating panes left, so the node keeps two children, does not collapse,
 # and stays the root with nothing but floating cells in it.
@@ -856,11 +890,11 @@ must_equal 'Panes left with two floating panes' \
 	"$($TMUX display-message -p -t L:gone2 '#{window_panes}')" '2'
 
 # The node is the root this time rather than the floating cell, but it has no
-# tiled cell anywhere under it either, so there is still no v1 dump to make -
+# tiled cell anywhere under it either, so the v1 body is still empty -
 # and making one must not take the server with it.
 got=$(v1_layout L:gone2)
 check_ok display-message -p alive
-must_equal 'v1 dump with two floating panes and no tiled panes' "$got" ''
+must_equal 'v1 dump with two floating panes and no tiled panes' "$got" '0000,'
 
 # Nor must parsing a v1 layout against it. There is no tiled pane for the
 # layout to name, so whether it is applied or rejected is the format's business;

regress/options-values.sh

@@ -86,11 +86,6 @@ check_value "-gv status-keys" "vi"
 check_fail "unknown value: bogus" set -g status-keys bogus
 check_value "-gv status-keys" "vi"
 
-# pane-border-lines accepts rounded as a pane border style.
-check_ok set -gw pane-border-lines rounded
-check_value "-gwv pane-border-lines" "rounded"
-check_ok set -gw pane-border-lines single
-
 # --- flag options ---------------------------------------------------------
 #
 # focus-events is an on/off flag.  Setting with no value toggles it; explicit

regress/respawn-pane-control-lag.sh

@@ -15,7 +15,7 @@ PATH=/bin:/usr/bin
 TERM=screen
 
 [ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
-TMUX="$TEST_TMUX -Ltest"
+TMUX="$TEST_TMUX -Ltest$$"
 $TMUX kill-server 2>/dev/null
 
 DIR=$(mktemp -d)

regress/run-shell-cwd.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# run-shell -c should expand formats using the target pane.
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -LtestA$$ -f/dev/null"
+
+TMP=$(mktemp -d)
+trap '$TMUX kill-server 2>/dev/null; rm -rf "$TMP"' 0 1 15
+TMP=$(cd "$TMP" && pwd -P)
+mkdir "$TMP/first" "$TMP/second dir" || exit 1
+
+check_directory()
+{
+	actual=$(cat "$TMP/out")
+	if [ "$actual" != "$1" ]; then
+		echo "Expected directory '$1', got '$actual'"
+		exit 1
+	fi
+}
+
+# The start path is available immediately, before the child is scheduled.
+# Use it to test the format context in the same command queue as creation.
+$TMUX new-session -d -s test -c "$TMP/first" 'sleep 60' \; \
+	 run-shell -c '#{pane_start_path}' "pwd >'$TMP/out'" || exit 1
+check_directory "$TMP/first"
+
+# An explicit target must supply the format context, including with a delay.
+pane=$($TMUX new-window -d -P -F '#{pane_id}' -t test \
+	-c "$TMP/second dir" 'sleep 60') || exit 1
+# The current path depends on the operating system finding the child process.
+i=0
+while [ "$($TMUX display-message -p -t "$pane" '#{pane_current_path}')" != \
+    "$TMP/second dir" ]; do
+	if [ "$i" -ge 100 ]; then
+		echo "Timed out waiting for pane current directory"
+		exit 1
+	fi
+	sleep 0.05
+	i=$((i + 1))
+done
+$TMUX run-shell -t "$pane" -d 0.1 -c '#{pane_current_path}' \
+	"pwd >'$TMP/out'" || exit 1
+check_directory "$TMP/second dir"
+
+# Literal directories and the default client directory still work.
+$TMUX run-shell -c "$TMP/second dir" "pwd >'$TMP/out'" || exit 1
+check_directory "$TMP/second dir"
+(cd "$TMP/first" && $TMUX run-shell "pwd >'$TMP/out'") || exit 1
+check_directory "$TMP/first"
+
+exit 0

regress/screen-redraw-floating.sh

@@ -107,12 +107,6 @@ $TMUX2 new-pane -x28 -y8 -X4 -Y1 -B double \
 	"sh -c 'printf FLOAT; exec sleep 100'" || exit 1
 compare floating-border-double
 
-# Larger floating pane with rounded border lines.
-new_scene 40 12
-$TMUX2 new-pane -x28 -y8 -X4 -Y1 -B rounded \
-	"sh -c 'printf FLOAT; exec sleep 100'" || exit 1
-compare floating-border-rounded
-
 # Floating pane with no border lines: redraw_mark_pane_borders returns early so
 # the float has no border at all, only its (clipped) content over the base pane.
 new_scene 40 12

regress/screen-redraw-results/floating-border-rounded.result

@@ -1,12 +0,0 @@
-base
-    ╭──────────────────────────╮
-    │FLOAT                     │
-    │                          │
-    │                          │
-    │                          │
-    │                          │
-    │                          │
-    ╰──────────────────────────╯
-
-
-

regress/screen-redraw-tiled.sh

@@ -95,7 +95,8 @@ layout_tee_down() {		# top/bottom, bottom split: a top tee
 $TMUX kill-server 2>/dev/null
 $TMUX2 kill-server 2>/dev/null
 
-$TMUX2 new -d -x40 -y14 "sh -c 'exec sleep 100'" || exit 1
+# Keep the anchor window alive until cleanup, even on slow test runs.
+$TMUX2 new -d -x40 -y14 'exec cat' || exit 1
 $TMUX2 set -g status off || exit 1
 $TMUX2 set -g window-size manual || exit 1
 $TMUX2 set -g pane-border-format " #{pane_index} " || exit 1

regress/sync-output-wrapped.sh

@@ -0,0 +1,116 @@
+#!/bin/sh
+
+# When only some lines are redrawn after a synchronized update, a line
+# following a wrapped line must be drawn at its own position, not where the
+# cursor happens to be.
+
+PATH=/bin:/usr/bin
+TERM=screen
+LC_ALL=C.UTF-8
+export PATH TERM LC_ALL
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+
+DIR=$(mktemp -d) || exit 1
+TMUX_TMPDIR=$DIR
+export TMUX_TMPDIR
+
+INNER="$TEST_TMUX -Li$$ -f/dev/null"
+OUTER="$TEST_TMUX -Lo$$ -f/dev/null"
+CONTROL=$DIR/control
+EMITTER=$DIR/emitter.pl
+
+fail()
+{
+	echo "$*" >&2
+	exit 1
+}
+
+cleanup()
+{
+	$OUTER kill-server 2>/dev/null
+	$INNER kill-server 2>/dev/null
+	rm -rf "$DIR"
+}
+trap cleanup 0 1 15
+
+wait_for_file()
+{
+	i=0
+	while [ "$i" -lt 50 ] && [ ! -e "$1" ]; do
+		sleep 0.1
+		i=$((i + 1))
+	done
+	[ -e "$1" ] || fail "$2"
+}
+
+wait_for_client()
+{
+	i=0
+	while [ "$i" -lt 50 ]; do
+		$INNER list-clients -F '#{client_termfeatures}' 2>/dev/null |
+		    grep -q 'sync' && return 0
+		sleep 0.1
+		i=$((i + 1))
+	done
+	fail "sync-capable client did not attach"
+}
+
+cat >"$EMITTER" <<'PERL'
+use strict;
+use warnings;
+
+my $control = $ENV{CONTROL};
+(my $dir = $control) =~ s{/[^/]+$}{};
+
+# Fill the screen with 80 column lines and no newlines so every line wraps.
+my $out = "\e[H\e[2J";
+for my $row (1 .. 24) {
+	$out .= substr(sprintf("ROW%02d_", $row) . ('x' x 80), 0, 80);
+}
+syswrite STDOUT, $out . "\e[1;1H";
+
+open my $painted, '>', "$dir/painted" or die "$dir/painted: $!\n";
+close $painted;
+while (!-e $control) {
+	select undef, undef, undef, 0.01;
+}
+
+# Change rows 2 and 6 in one synchronized update.
+my $frame = "\e[?2026h" .
+    "\e[2;1H" . substr("NEW02_" . ('#' x 80), 0, 80) .
+    "\e[6;1H" . substr("NEW06_" . ('%' x 80), 0, 80) .
+    "\e[24;1H" .
+    "\e[?2026l";
+my $written = syswrite STDOUT, $frame;
+die "short synchronized frame write\n"
+    unless defined $written && $written == length $frame;
+open my $done, '>', "$dir/done" or die "$dir/done: $!\n";
+close $done;
+select undef, undef, undef, 3;
+PERL
+
+$INNER new-session -d -s inner -x 80 -y 24 \
+    "CONTROL='$CONTROL' perl '$EMITTER'" || exit 1
+$INNER set-option -g status off || exit 1
+$INNER set-option -g window-size manual || exit 1
+$INNER set-option -as terminal-features '*:sync' || exit 1
+
+$OUTER new-session -d -s outer -x 80 -y 24 \
+    "$TEST_TMUX -Li$$ -f/dev/null attach-session -t inner" ||
+    exit 1
+$OUTER set-option -g status off || exit 1
+$OUTER set-option -g window-size manual || exit 1
+wait_for_client
+
+wait_for_file "$DIR/painted" "application did not paint"
+sleep 1
+: >"$CONTROL"
+wait_for_file "$DIR/done" "application did not finish"
+sleep 1
+
+$OUTER capture-pane -p -t outer:0.0 >"$DIR/screen" || exit 1
+sed -n 2p "$DIR/screen" | grep -q '^NEW02_#' || fail "row 2 not redrawn"
+sed -n 3p "$DIR/screen" | grep -q '^ROW03_x' || fail "row 3 overwritten"
+sed -n 6p "$DIR/screen" | grep -q '^NEW06_%' || fail "row 6 not redrawn"
+exit 0

regress/tty-keys.sh

@@ -9,14 +9,37 @@ $TMUX kill-server 2>/dev/null
 TMUX2="$TEST_TMUX -LtestB$$ -f/dev/null"
 $TMUX2 kill-server 2>/dev/null
 
-TMP=$(mktemp)
-trap "rm -f $TMP" 0 1 15
+TMP=$(mktemp) || exit 1
+prompt_pid=
+
+cleanup () {
+	if [ -n "$prompt_pid" ]; then
+		kill "$prompt_pid" 2>/dev/null
+		wait "$prompt_pid" 2>/dev/null
+	fi
+	$TMUX kill-server 2>/dev/null
+	$TMUX2 kill-server 2>/dev/null
+	rm -f "$TMP"
+}
+trap cleanup 0
+trap 'exit 1' 1 2 15
+
+fail () {
+	echo "[FAIL] $*" >&2
+	exit 1
+}
 
 $TMUX2 -f/dev/null new -d || exit 1
 $TMUX -f/dev/null new -d "$TMUX2 attach" || exit 1
-sleep 1
+i=0
+while [ -z "$($TMUX2 list-clients -F '#{client_name}')" ]; do
+	[ "$i" -lt 100 ] || fail "inner client did not attach"
+	sleep 0.05
+	i=$((i + 1))
+done
 
 exit_status=0
+assertion=0
 
 format_string () {
 	case $1 in
@@ -34,12 +57,33 @@ assert_key () {
 	expected_name=$2
 	format_string=$(format_string "$expected_name")
 
-	$TMUX2 command-prompt -k 'display-message -pl '"$format_string" > "$TMP" &
-	sleep 0.05
+	# Use a different prompt each time so a stale redraw cannot look ready.
+	assertion=$((assertion + 1))
+	prompt="tty-keys-$assertion:"
+	$TMUX2 command-prompt -k -p "$prompt" \
+	    'display-message -pl '"$format_string" > "$TMP" &
+	prompt_pid=$!
+	i=0
+	while ! $TMUX capture-pane -p | grep -Fq "$prompt"; do
+		kill -0 "$prompt_pid" 2>/dev/null || \
+		    fail "$keys -> $expected_name: prompt exited before becoming ready"
+		[ "$i" -lt 100 ] || \
+		    fail "$keys -> $expected_name: timed out waiting for prompt"
+		sleep 0.05
+		i=$((i + 1))
+	done
 
-	$TMUX send-keys $keys
+	$TMUX send-keys $keys || fail "could not send $keys"
 
-	wait
+	i=0
+	while kill -0 "$prompt_pid" 2>/dev/null; do
+		[ "$i" -lt 100 ] || \
+		    fail "$keys -> $expected_name: timed out waiting for key"
+		sleep 0.05
+		i=$((i + 1))
+	done
+	wait "$prompt_pid" || fail "$keys -> $expected_name: prompt failed"
+	prompt_pid=
 
 	keys=$(printf '%s' "$keys" | sed -e 's/Escape/\\\\033/g' | tr -d '[:space:]')
 	actual_name=$(tr -d '[:space:]' < "$TMP")
@@ -293,6 +337,16 @@ assert_key 'Escape [24@' 'C-S-F12'
 assert_key 'Escape [I' 'FocusIn'
 assert_key 'Escape [O' 'FocusOut'
 
+# Focus events do not leave the prefix table.
+$TMUX2 bind C-c set -g @focus-prefix yes
+$TMUX2 set -g focus-events on
+$TMUX send-keys C-b Escape '[O' Escape '[I' C-c
+sleep 0.05
+if [ "$($TMUX2 show -gv @focus-prefix)" != yes ]; then
+	echo "[FAIL] FocusIn and FocusOut left the prefix table"
+	exit_status=1
+fi
+
 # Paste keys
 assert_key 'Escape [200~' 'PasteStart'
 assert_key 'Escape [201~' 'PasteEnd'
@@ -355,7 +409,4 @@ assert_key 'Escape [32;2u' 'S-Space'
 assert_key 'Escape [9;5u' 'C-Tab'
 assert_key 'Escape [1;5Z' 'C-S-Tab'
 
-$TMUX kill-server 2>/dev/null
-$TMUX2 kill-server 2>/dev/null
-
 exit $exit_status

regress/wait-for-client-lost.sh

@@ -0,0 +1,164 @@
+#!/bin/sh
+
+# A disconnected waiter must release both its wait and its command queue.
+PATH=/bin:/usr/bin
+TERM=screen
+export TERM
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+OUT=$(mktemp -d)
+TMUX="$TEST_TMUX -S$OUT/socket -f/dev/null"
+pids=
+
+cleanup()
+{
+	for pid in $pids; do
+		kill "$pid" 2>/dev/null || true
+	done
+	$TMUX kill-server 2>/dev/null || true
+	rm -rf "$OUT"
+}
+trap cleanup EXIT
+
+fail()
+{
+	echo "$*" >&2
+	exit 1
+}
+
+wait_list()
+{
+	expected=$1
+	shift
+	i=0
+	while [ $i -lt 100 ]; do
+		value=$($TMUX wait-for -l "$@") || fail "list waiters failed"
+		[ "$value" = "$expected" ] && return
+		i=$((i + 1))
+		sleep 0.05
+	done
+	fail "expected waiters '$expected', got '$value'"
+}
+
+wait_free()
+{
+	client_pid=$1
+	i=0
+	while [ $i -lt 100 ]; do
+		awk -v pid="$client_pid" '
+		    $4 == "IDENTIFY_CLIENTPID" && $5 == pid { address = $3 }
+		    address != "" && $2 == "free" && $3 == "client" &&
+		    $4 == address && $5 == "(0" { freed = 1 }
+		    END { exit !freed }
+		' "$OUT"/tmux-server-*.log && return
+		i=$((i + 1))
+		sleep 0.05
+	done
+	fail "client $client_pid was not freed"
+}
+
+cd "$OUT" || exit 1
+$TMUX -vv new-session -d -s test || fail "new-session failed"
+$TMUX set -g @continued 0 || fail "set option failed"
+
+for signal in TERM KILL; do
+	for kind in channel lock event; do
+		name="$kind-$signal"
+		case $kind in
+		channel) args="$name"; list_args="$name" ;;
+		lock)
+			$TMUX wait-for -L "$name" || fail "lock failed"
+			args="-L $name"; list_args="$name"
+			;;
+		event) args="-E @$name"; list_args="-E @$name" ;;
+		esac
+
+		$TMUX wait-for $args \; set -g @continued 1 &
+		dead=$!
+		pids="$dead"
+		wait_list "client-$dead" $list_args
+
+		$TMUX wait-for $args &
+		live=$!
+		pids="$dead $live"
+		wait_list "$(printf 'client-%s\nclient-%s' "$dead" "$live")" \
+		    $list_args
+
+		kill -"$signal" "$dead" || fail "kill failed"
+		wait "$dead" 2>/dev/null || true
+		pids="$live"
+		wait_list "client-$live" $list_args
+		wait_free "$dead"
+		[ "$($TMUX show -gqv @continued)" = 0 ] ||
+			fail "disconnected client's next command ran"
+
+		case $kind in
+		channel) $TMUX wait-for -S "$name" || fail "signal failed" ;;
+		lock) $TMUX wait-for -U "$name" || fail "unlock failed" ;;
+		event)
+			$TMUX wait-for -E -w "client-$live" "@$name" ||
+				fail "wake event waiter failed"
+			;;
+		esac
+		wait_list "" $list_args
+		wait_free "$live"
+		wait "$live" || fail "surviving waiter failed"
+		pids=
+		if [ "$kind" = lock ]; then
+			$TMUX wait-for -U "$name" || fail "final unlock failed"
+		fi
+	done
+done
+
+# Removing the last waiter must remove its otherwise unused channel, and must
+# not create a pending signal. Unrelated pending signals must be preserved.
+$TMUX wait-for -S saved || fail "save signal failed"
+$TMUX wait-for last &
+dead=$!
+pids="$dead"
+wait_list "client-$dead" last
+kill -KILL "$dead" || fail "kill last waiter failed"
+wait "$dead" 2>/dev/null || true
+pids=
+wait_list "" last
+wait_free "$dead"
+grep -F 'remove empty wait channel last' "$OUT"/tmux-server-*.log \
+    >/dev/null || fail "empty channel was not removed"
+
+$TMUX wait-for saved \; wait-for last &
+live=$!
+pids="$live"
+wait_list "client-$live" last
+$TMUX wait-for -S last || fail "signal last failed"
+wait_free "$live"
+wait "$live" || fail "pending signal was not preserved"
+pids=
+
+# Source-file leaves a cleanup callback behind the blocked command.
+printf 'wait-for sourced\nset -g @continued 1\n' >"$OUT/source.conf"
+$TMUX source-file "$OUT/source.conf" &
+dead=$!
+pids="$dead"
+wait_list "client-$dead" sourced
+kill -KILL "$dead" || fail "kill source-file waiter failed"
+wait "$dead" 2>/dev/null || true
+pids=
+wait_list "" sourced
+wait_free "$dead"
+[ "$($TMUX show -gqv @continued)" = 0 ] ||
+	fail "disconnected source-file client's next command ran"
+
+# Firing an event after cancellation must not call the removed event sink.
+$TMUX wait-for -E window-renamed &
+dead=$!
+pids="$dead"
+wait_list "client-$dead" -E window-renamed
+kill -KILL "$dead" || fail "kill event waiter failed"
+wait "$dead" 2>/dev/null || true
+pids=
+wait_list "" -E window-renamed
+wait_free "$dead"
+$TMUX rename-window -t test:0 renamed || fail "rename-window failed"
+$TMUX display-message -p '#{pid}' >/dev/null || fail "server exited"
+
+exit 0

screen-redraw.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: screen-redraw.c,v 1.159 2026/09/09 08:31:42 nicm Exp $ */
+/* $OpenBSD: screen-redraw.c,v 1.161 2026/09/22 16:56:07 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1673,7 +1673,7 @@ redraw_draw_pane_prompt(struct redraw_draw_ctx *dctx, struct window_pane *wp)
 	prompt_draw(wp->prompt, &pdd);
 	screen_write_stop(&ctx);
 
-	tty_draw_line(tty, &screen, 0, offset, width, px, cy, NULL);
+	tty_draw_line(tty, &screen, offset, 0, width, px, cy, NULL);
 	screen_free(&screen);
 }
 

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);

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,

server-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: server-client.c,v 1.512 2026/09/10 11:02:18 nicm Exp $ */
+/* $OpenBSD: server-client.c,v 1.514 2026/09/22 06:46:50 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -502,6 +502,9 @@ server_client_lost(struct client *c)
 	TAILQ_REMOVE(&clients, c, entry);
 	log_debug("lost client %p", c);
 
+	cmd_wait_for_client_lost(c);
+	cmdq_next(c);
+
 	if (c->flags & CLIENT_ATTACHED) {
 		server_client_attached_lost(c);
 		events_fire_client("client-detached", c);
@@ -2194,7 +2197,6 @@ 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);

server-fn.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: server-fn.c,v 1.153 2026/09/10 11:02:18 nicm Exp $ */
+/* $OpenBSD: server-fn.c,v 1.154 2026/09/21 12:43:36 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -310,8 +310,8 @@ server_link_window(struct session *src, struct winlink *srcwl,
 		}
 		if (killflag) {
 			/*
-			 * Can't use session_detach as it will destroy session
-			 * if this makes it empty.
+			 * Can't use session_detach as it won't detach the only
+			 * window.
 			 */
 			events_fire_winlink("window-unlinked", dstwl);
 			dstwl->flags &= ~WINLINK_ALERTFLAGS;

session.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: session.c,v 1.107 2026/08/05 07:35:35 nicm Exp $ */
+/* $OpenBSD: session.c,v 1.108 2026/09/21 12:43:36 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -336,10 +336,17 @@ session_attach(struct session *s, struct window *w, int idx, char **cause)
 	return (wl);
 }
 
-/* Detach a window from a session. */
+/*
+ * Detach a window from a session. Returns 1 if the window has not been
+ * detached - the caller must destroy the session.
+ */
 int
 session_detach(struct session *s, struct winlink *wl)
 {
+	if (RB_MIN(winlinks, &s->windows) == wl &&
+	    RB_MAX(winlinks, &s->windows) == wl)
+		return (1);
+
 	if (s->curw == wl &&
 	    session_last(s) != 0 &&
 	    session_previous(s, 0) != 0)
@@ -352,8 +359,6 @@ session_detach(struct session *s, struct winlink *wl)
 
 	session_group_synchronize_from(s);
 
-	if (RB_EMPTY(&s->windows))
-		return (1);
 	return (0);
 }
 

spawn.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: spawn.c,v 1.52 2026/08/20 09:19:24 nicm Exp $ */
+/* $OpenBSD: spawn.c,v 1.53 2026/09/21 12:43:36 nicm Exp $ */
 
 /*
  * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -166,8 +166,8 @@ spawn_window(struct spawn_context *sc, char **cause)
 		}
 		if (wl != NULL) {
 			/*
-			 * Can't use session_detach as it will destroy session
-			 * if this makes it empty.
+			 * Can't use session_detach as it won't detach the only
+			 * window.
 			 */
 			wl->flags &= ~WINLINK_ALERTFLAGS;
 			events_fire_winlink("window-unlinked", wl);

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1170 2026/09/11 10:17:16 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1172 2026/09/22 06:58:05 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: September 11 2026 $
+.Dd $Mdocdate: September 22 2026 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -4907,30 +4907,14 @@ 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 +4923,26 @@ 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 +4955,6 @@ 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
@@ -5115,6 +5085,9 @@ The available features are:
 .Bl -tag -width Ds
 .It 256
 Supports 256 colours with the SGR escape sequences.
+.It appesc
+Supports application escape key mode, where the Escape key sends a sequence
+that cannot be mistaken for the start of another key.
 .It clipboard
 Allows setting the system clipboard.
 .It ccolour
@@ -5133,9 +5106,6 @@ 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
@@ -6013,8 +5983,6 @@ single lines using ACS or UTF\-8 characters
 double lines using UTF\-8 characters
 .It heavy
 heavy lines using UTF\-8 characters
-.It rounded
-single lines with rounded corners using UTF\-8 characters
 .It simple
 simple ASCII characters
 .It number
@@ -7342,7 +7310,6 @@ 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"
@@ -9004,6 +8971,8 @@ These are set automatically if the
 capability is present.
 .It Em \&Dseks , \&Eneks
 Disable and enable extended keys.
+.It Em \&Dsesc , \&Enesc
+Disable and enable application escape key mode.
 .It Em \&Dsfcs , \&Enfcs
 Disable and enable focus reporting.
 These are set automatically if the

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1440 2026/09/11 10:17:16 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1447 2026/09/22 14:10:26 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -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,
@@ -537,6 +464,7 @@ enum tty_code_code {
 	TTYC_DL1,
 	TTYC_DSBP,
 	TTYC_DSEKS,
+	TTYC_DSESC,
 	TTYC_DSFCS,
 	TTYC_DSMG,
 	TTYC_E3,
@@ -547,6 +475,7 @@ enum tty_code_code {
 	TTYC_ENACS,
 	TTYC_ENBP,
 	TTYC_ENEKS,
+	TTYC_ENESC,
 	TTYC_ENFCS,
 	TTYC_ENMG,
 	TTYC_FSL,
@@ -775,16 +704,6 @@ 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 +1070,6 @@ 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 +1091,6 @@ 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;
@@ -1240,8 +1152,7 @@ enum pane_lines {
 	PANE_LINES_SIMPLE,
 	PANE_LINES_NUMBER,
 	PANE_LINES_SPACES,
-	PANE_LINES_NONE,
-	PANE_LINES_ROUNDED
+	PANE_LINES_NONE
 };
 
 /* Pane border indicator option. */
@@ -1829,7 +1740,7 @@ struct tty_term {
 #define TERM_VT100LIKE 0x20
 #define TERM_SIXEL 0x40
 #define TERM_INVALIDMS 0x80
-#define TERM_KITTYKEYS 0x100
+#define TERM_NOREPLACE 0x100
 	int		 flags;
 
 	LIST_ENTRY(tty_term) entry;
@@ -1910,12 +1821,9 @@ 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;
 
@@ -2398,7 +2306,7 @@ struct client {
 #define CLIENT_ASSUMEPASTING 0x2000000000ULL
 #define CLIENT_WRITE_ACK 0x4000000000ULL
 #define CLIENT_NO_DETACH_ON_DESTROY 0x8000000000ULL
-#define CLIENT_CONTROL_DISCARD 0x1000000000ULL
+#define CLIENT_CONTROL_DISCARD 0x10000000000ULL
 #define CLIENT_ALLREDRAWFLAGS		\
 	(CLIENT_REDRAWWINDOW|		\
 	 CLIENT_REDRAWSTATUS|		\
@@ -3068,7 +2976,6 @@ 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 *);
@@ -3103,7 +3010,7 @@ void	tty_default_colours(struct grid_cell *, struct window_pane *, u_int *);
 /* tty-term.c */
 extern struct tty_terms tty_terms;
 u_int		 tty_term_ncodes(void);
-void		 tty_term_apply(struct tty_term *, const char *, int);
+void		 tty_term_apply(struct tty_term *, const char *, int, int);
 void		 tty_term_apply_overrides(struct tty_term *);
 struct tty_term *tty_term_create(struct tty *, char *, char **, u_int, char **);
 void		 tty_term_free(struct tty_term *);
@@ -3323,6 +3230,7 @@ void 		 cmdq_print_data(struct cmdq_item *, struct evbuffer *);
 void printflike(2, 3) cmdq_error(struct cmdq_item *, const char *, ...);
 
 /* cmd-wait-for.c */
+void	cmd_wait_for_client_lost(struct client *);
 void	cmd_wait_for_flush(void);
 
 /* client.c */
@@ -3550,20 +3458,6 @@ 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);
@@ -3943,6 +3837,7 @@ int		 window_pane_get_pane_status(struct window_pane *);
 struct style_range *window_pane_status_get_range(struct window_pane *, u_int,
 		     u_int);
 int		 window_pane_is_floating(struct window_pane *);
+int		 window_pane_is_floating_with_hidden(struct window_pane *);
 
 /* window-border.c */
 void		 window_set_fill_cells(struct window *);

tty-draw.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-draw.c,v 1.15 2026/07/26 09:02:08 nicm Exp $ */
+/* $OpenBSD: tty-draw.c,v 1.17 2026/09/22 06:49:47 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -219,7 +219,12 @@ tty_draw_line(struct tty *tty, struct screen *s, u_int px, u_int py, u_int nx,
 	}
 
 	/* Did the previous line wrap on to this one? */
-	if (py != 0 && atx == 0 && tty->cx >= tty->sx && nx == tty->sx) {
+	if (py != 0 &&
+	    atx == 0 &&
+	    tty->cx >= tty->sx &&
+	    tty->cy != UINT_MAX &&
+	    tty->cy + 1 == aty &&
+	    nx == tty->sx) {
 		gl = grid_get_line(gd, gd->hsize + py - 1);
 		if (gl->flags & GRID_LINE_WRAPPED)
 			wrapped = 1;

tty-features.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-features.c,v 1.43 2026/08/31 12:41:03 kirill Exp $ */
+/* $OpenBSD: tty-features.c,v 1.45 2026/09/22 14:10:26 nicm Exp $ */
 
 /*
  * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -189,6 +189,18 @@ static const struct tty_feature tty_feature_focus = {
 	0
 };
 
+/* Terminal supports application escape key mode. */
+static const char *const tty_feature_appesc_capabilities[] = {
+	"Enesc=\\E[?7727h",
+	"Dsesc=\\E[?7727l",
+	NULL
+};
+static const struct tty_feature tty_feature_appesc = {
+	"appesc",
+	tty_feature_appesc_capabilities,
+	0
+};
+
 /* Terminal supports cursor styles. */
 static const char *const tty_feature_cstyle_capabilities[] = {
 	"Ss=\\E[%p1%d q",
@@ -198,7 +210,7 @@ static const char *const tty_feature_cstyle_capabilities[] = {
 static const struct tty_feature tty_feature_cstyle = {
 	"cstyle",
 	tty_feature_cstyle_capabilities,
-	0
+	TERM_NOREPLACE
 };
 
 /* Terminal supports cursor colours. */
@@ -235,13 +247,6 @@ 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",
@@ -385,6 +390,7 @@ static const struct tty_feature tty_feature_utf8 = {
 /* Available terminal features. */
 static const struct tty_feature *const tty_features[] = {
 	&tty_feature_256,
+	&tty_feature_appesc,
 	&tty_feature_bpaste,
 	&tty_feature_ccolour,
 	&tty_feature_clipboard,
@@ -393,7 +399,6 @@ 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,
@@ -549,11 +554,11 @@ tty_apply_features(struct tty_term *term)
 			capability = tf->capabilities;
 			while (*capability != NULL) {
 				log_debug("adding capability: %s", *capability);
-				tty_term_apply(term, *capability, 1);
+				tty_term_apply(term, *capability, 1, tf->flags);
 				capability++;
 			}
 		}
-		term->flags |= tf->flags;
+		term->flags |= (tf->flags & ~TERM_NOREPLACE);
 		if (tf == &tty_feature_utf8)
 			c->flags |= CLIENT_UTF8;
 	}
@@ -576,6 +581,7 @@ tty_default_features(struct client *c, const char *name, u_int version)
 	"256,RGB,bpaste,clipboard,mouse,strikethrough,title"
 		{ .name = "mintty",
 		  .features = TTY_FEATURES_BASE_MODERN_XTERM ","
+			      "appesc,"
 			      "ccolour,"
 			      "cstyle,"
 			      "extkeys,"

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;
 

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);
-}

tty-term.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty-term.c,v 1.109 2026/08/25 08:37:08 nicm Exp $ */
+/* $OpenBSD: tty-term.c,v 1.111 2026/09/22 14:10:26 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -90,6 +90,7 @@ static const struct tty_term_code_entry tty_term_codes[] = {
 	[TTYC_DL1] = { TTYCODE_STRING, "dl1" },
 	[TTYC_DL] = { TTYCODE_STRING, "dl" },
 	[TTYC_DSEKS] = { TTYCODE_STRING, "Dseks" },
+	[TTYC_DSESC] = { TTYCODE_STRING, "Dsesc" },
 	[TTYC_DSFCS] = { TTYCODE_STRING, "Dsfcs" },
 	[TTYC_DSBP] = { TTYCODE_STRING, "Dsbp" },
 	[TTYC_DSMG] = { TTYCODE_STRING, "Dsmg" },
@@ -101,6 +102,7 @@ static const struct tty_term_code_entry tty_term_codes[] = {
 	[TTYC_ENACS] = { TTYCODE_STRING, "enacs" },
 	[TTYC_ENBP] = { TTYCODE_STRING, "Enbp" },
 	[TTYC_ENEKS] = { TTYCODE_STRING, "Eneks" },
+	[TTYC_ENESC] = { TTYCODE_STRING, "Enesc" },
 	[TTYC_ENFCS] = { TTYCODE_STRING, "Enfcs" },
 	[TTYC_ENMG] = { TTYCODE_STRING, "Enmg" },
 	[TTYC_FSL] = { TTYCODE_STRING, "fsl" },
@@ -362,7 +364,8 @@ tty_term_override_next(const char *s, size_t *offset)
 }
 
 void
-tty_term_apply(struct tty_term *term, const char *capabilities, int quiet)
+tty_term_apply(struct tty_term *term, const char *capabilities, int quiet,
+    int flags)
 {
 	const struct tty_term_code_entry	*ent;
 	struct tty_code				*code;
@@ -405,6 +408,9 @@ tty_term_apply(struct tty_term *term, const char *capabilities, int quiet)
 			if (strcmp(s, ent->name) != 0)
 				continue;
 			code = &term->codes[i];
+			if ((flags & TERM_NOREPLACE) &&
+			    code->type != TTYCODE_NONE)
+				continue;
 
 			if (remove) {
 				code->type = TTYCODE_NONE;
@@ -457,7 +463,7 @@ tty_term_apply_overrides(struct tty_term *term)
 		offset = 0;
 		first = tty_term_override_next(s, &offset);
 		if (first != NULL && fnmatch(first, term->name, 0) == 0)
-			tty_term_apply(term, s + offset, 0);
+			tty_term_apply(term, s + offset, 0, 0);
 		a = options_array_next(a);
 	}
 

tty.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: tty.c,v 1.480 2026/08/25 08:37:08 nicm Exp $ */
+/* $OpenBSD: tty.c,v 1.482 2026/09/22 06:58:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -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)
@@ -505,14 +503,9 @@ tty_stop_tty(struct tty *tty)
 	if (tty_term_has(tty->term, TTYC_DSBP))
 		tty_raw(tty, tty_term_string(tty->term, TTYC_DSBP));
 
-	if (tty->term->flags & TERM_VT100LIKE)
-		tty_raw(tty, "\033[?7727l");
+	tty_raw(tty, tty_term_string(tty->term, TTYC_DSESC));
 	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));
@@ -565,16 +558,11 @@ 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)
-		tty_puts(tty, "\033[?7727h");
+	tty_puts(tty, tty_term_string(tty->term, TTYC_ENESC));
 
 	/*
 	 * Features might have changed since the first draw during attach. For

utf8.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: utf8.c,v 1.72 2026/09/01 12:49:49 nicm Exp $ */
+/* $OpenBSD: utf8.c,v 1.73 2026/09/20 08:11:00 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -374,8 +374,13 @@ utf8_add_to_width_cache(const char *s)
 			wc_end = wc_start;
 		}
 
-		for (wc = wc_start; wc <= wc_end; wc++)
+		wc = wc_start;
+		for (;;) {
 			utf8_insert_width_cache(wc, width);
+			if (wc == wc_end)
+				break;
+			wc++;
+		}
 	} else {
 		utf8_no_width = 1;
 		ud = utf8_fromcstr(copy);

window-border.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-border.c,v 1.4 2026/09/11 10:17:16 nicm Exp $ */
+/* $OpenBSD: window-border.c,v 1.3 2026/07/23 09:38:27 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -120,10 +120,6 @@ window_get_border_cell(struct window_pane *wp, enum pane_lines pane_lines,
 		gc->attr &= ~GRID_ATTR_CHARSET;
 		utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
 		break;
-	case PANE_LINES_ROUNDED:
-		gc->attr &= ~GRID_ATTR_CHARSET;
-		utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
-		break;
 	case PANE_LINES_SIMPLE:
 		gc->attr &= ~GRID_ATTR_CHARSET;
 		utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);

window-copy.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window-copy.c,v 1.429 2026/09/01 13:04:29 nicm Exp $ */
+/* $OpenBSD: window-copy.c,v 1.431 2026/09/21 10:43:37 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -401,7 +401,7 @@ window_copy_clone_screen(struct screen *src, struct screen *hint, u_int *cx,
 
 	sy = screen_hsize(src) + screen_size_y(src);
 	if (trim) {
-		while (sy > screen_hsize(src)) {
+		while (sy > screen_hsize(src) + 1) {
 			gl = grid_peek_line(src->grid, sy - 1);
 			if (gl == NULL || gl->cellused != 0)
 				break;

window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window.c,v 1.374 2026/09/08 08:37:56 nicm Exp $ */
+/* $OpenBSD: window.c,v 1.377 2026/09/21 10:33:16 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -449,9 +449,17 @@ window_create(u_int sx, u_int sy, u_int xpixel, u_int ypixel)
 static void
 window_destroy(struct window *w)
 {
+	struct window_pane	*wp;
+
 	log_debug("window @%u destroyed (%d references)", w->id, w->references);
 
-	window_unzoom(w, 0);
+	if (w->flags & WINDOW_ZOOMED) {
+		w->flags &= ~WINDOW_ZOOMED;
+		TAILQ_FOREACH(wp, &w->panes, entry) {
+			wp->flags &= ~PANE_ZOOMED;
+			wp->saved_layout_cell = NULL;
+		}
+	}
 	RB_REMOVE(windows, &windows, w);
 
 	layout_free_cell(w->layout_root, 0);
@@ -2906,3 +2914,15 @@ window_pane_is_floating(struct window_pane *wp)
 		return (0);
 	return (1);
 }
+
+int
+window_pane_is_floating_with_hidden(struct window_pane *wp)
+{
+	struct layout_cell	*lc = wp->layout_cell;
+
+	if (lc == NULL)
+		lc = wp->saved_layout_cell;
+	if (lc == NULL || (lc->flags & LAYOUT_CELL_FLOATING) == 0)
+		return (0);
+	return (1);
+}