Merge remote-tracking branch 'refs/remotes/tmux-openbsd/master'

* refs/remotes/tmux-openbsd/master:
  Add a one line description text to each command, originally from someone in GitHub issue 5438.

cmd-attach-session.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-attach-session.c,v 1.92 2026/10/02 12:48:52 nicm Exp $ */
+/* $OpenBSD: cmd-attach-session.c,v 1.93 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -35,6 +35,7 @@ static enum cmd_retval	cmd_attach_session_exec(struct cmd *,
 
 const struct cmd_entry cmd_attach_session_entry = {
 	.name = "attach-session",
+	.description = "Attach to an existing session.",
 	.alias = "attach",
 
 	.args = { "c:dEf:rt:x", 0, 0, NULL },

cmd-bind-key.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-bind-key.c,v 1.47 2025/04/09 07:03:04 nicm Exp $ */
+/* $OpenBSD: cmd-bind-key.c,v 1.48 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -34,6 +34,7 @@ static enum cmd_retval		cmd_bind_key_exec(struct cmd *,
 
 const struct cmd_entry cmd_bind_key_entry = {
 	.name = "bind-key",
+	.description = "Bind a key to one or more commands.",
 	.alias = "bind",
 
 	.args = { "nrN:T:", 1, -1, cmd_bind_key_args_parse },

cmd-break-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-break-pane.c,v 1.76 2026/08/17 07:04:45 nicm Exp $ */
+/* $OpenBSD: cmd-break-pane.c,v 1.77 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_break_pane_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_break_pane_entry = {
 	.name = "break-pane",
+	.description = "Move a pane into its own window or make it floating.",
 	.alias = "breakp",
 
 	.args = { "abdPF:n:s:t:Wx:X:y:Y:", 0, 0, NULL },

cmd-capture-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-capture-pane.c,v 1.69 2026/09/08 07:31:59 nicm Exp $ */
+/* $OpenBSD: cmd-capture-pane.c,v 1.70 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Jonathan Alvarado <radobobo@users.sourceforge.net>
@@ -40,6 +40,7 @@ static char	*cmd_capture_pane_hyperlinks(struct grid *, struct screen *,
 
 const struct cmd_entry cmd_capture_pane_entry = {
 	.name = "capture-pane",
+	.description = "Capture pane content.",
 	.alias = "capturep",
 
 	.args = { "ab:CeE:FHIJLMNpPqRS:Tt:", 0, 0, NULL },
@@ -54,6 +55,7 @@ const struct cmd_entry cmd_capture_pane_entry = {
 
 const struct cmd_entry cmd_clear_history_entry = {
 	.name = "clear-history",
+	.description = "Clear a pane's history.",
 	.alias = "clearhist",
 
 	.args = { "Ht:", 0, 0, NULL },

cmd-choose-tree.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-choose-tree.c,v 1.59 2026/10/07 13:13:49 nicm Exp $ */
+/* $OpenBSD: cmd-choose-tree.c,v 1.60 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2012 Thomas Adam <thomas@xteddy.org>
@@ -31,6 +31,7 @@ static enum cmd_retval		cmd_choose_tree_exec(struct cmd *,
 
 const struct cmd_entry cmd_choose_tree_entry = {
 	.name = "choose-tree",
+	.description = "Browse sessions and windows interactively.",
 	.alias = NULL,
 
 	.args = { "F:f:GhK:kNO:rst:wyZ", 0, 1, cmd_choose_tree_args_parse },
@@ -45,6 +46,7 @@ const struct cmd_entry cmd_choose_tree_entry = {
 
 const struct cmd_entry cmd_choose_client_entry = {
 	.name = "choose-client",
+	.description = "Choose a client interactively.",
 	.alias = NULL,
 
 	.args = { "F:f:hiK:kNO:rt:yZ", 0, 1, cmd_choose_tree_args_parse },
@@ -59,6 +61,7 @@ const struct cmd_entry cmd_choose_client_entry = {
 
 const struct cmd_entry cmd_choose_buffer_entry = {
 	.name = "choose-buffer",
+	.description = "Choose a paste buffer interactively.",
 	.alias = NULL,
 
 	.args = { "F:f:K:kNO:rt:yZ", 0, 1, cmd_choose_tree_args_parse },
@@ -73,6 +76,7 @@ const struct cmd_entry cmd_choose_buffer_entry = {
 
 const struct cmd_entry cmd_customize_mode_entry = {
 	.name = "customize-mode",
+	.description = "Browse and edit options and key bindings.",
 	.alias = NULL,
 
 	.args = { "F:f:kNt:yZ", 0, 0, NULL },
@@ -86,6 +90,7 @@ const struct cmd_entry cmd_customize_mode_entry = {
 
 const struct cmd_entry cmd_switch_mode_entry = {
 	.name = "switch-mode",
+	.description = "Switch the active pane mode.",
 	.alias = NULL,
 
 	.args = { "F:kO:rst:wZ", 0, 1, cmd_choose_tree_args_parse },
@@ -100,6 +105,7 @@ const struct cmd_entry cmd_switch_mode_entry = {
 
 const struct cmd_entry cmd_display_panes_entry = {
 	.name = "display-panes",
+	.description = "Display pane numbers.",
 	.alias = "displayp",
 
 	.args = { "d:kNs:t:Z", 0, 1, cmd_choose_tree_args_parse },

cmd-command-prompt.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-command-prompt.c,v 1.76 2026/08/25 06:04:33 nicm Exp $ */
+/* $OpenBSD: cmd-command-prompt.c,v 1.77 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -40,6 +40,7 @@ static void	cmd_command_prompt_free(void *);
 
 const struct cmd_entry cmd_command_prompt_entry = {
 	.name = "command-prompt",
+	.description = "Open an interactive command prompt.",
 	.alias = NULL,
 
 	.args = { "1CbeFiklI:NPp:t:T:", 0, 1, cmd_command_prompt_args_parse },

cmd-confirm-before.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-confirm-before.c,v 1.61 2026/06/24 10:55:39 nicm Exp $ */
+/* $OpenBSD: cmd-confirm-before.c,v 1.62 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -39,6 +39,7 @@ static void	cmd_confirm_before_free(void *);
 
 const struct cmd_entry cmd_confirm_before_entry = {
 	.name = "confirm-before",
+	.description = "Ask for confirmation before a command.",
 	.alias = "confirm",
 
 	.args = { "bc:p:t:y", 1, 1, cmd_confirm_before_args_parse },

cmd-copy-mode.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-copy-mode.c,v 1.55 2026/10/02 12:12:51 nicm Exp $ */
+/* $OpenBSD: cmd-copy-mode.c,v 1.56 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -28,6 +28,7 @@ static enum cmd_retval	cmd_copy_mode_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_copy_mode_entry = {
 	.name = "copy-mode",
+	.description = "Enter copy mode.",
 	.alias = NULL,
 
 	.args = { "dekHMqSs:t:u", 0, 0, NULL },
@@ -42,6 +43,7 @@ const struct cmd_entry cmd_copy_mode_entry = {
 
 const struct cmd_entry cmd_clock_mode_entry = {
 	.name = "clock-mode",
+	.description = "Show a large clock in a pane.",
 	.alias = NULL,
 
 	.args = { "t:", 0, 0, NULL },

cmd-detach-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-detach-client.c,v 1.39 2026/05/22 15:22:43 nicm Exp $ */
+/* $OpenBSD: cmd-detach-client.c,v 1.40 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_detach_client_exec(struct cmd *,
 
 const struct cmd_entry cmd_detach_client_entry = {
 	.name = "detach-client",
+	.description = "Detach one or more clients.",
 	.alias = "detach",
 
 	.args = { "aE:s:t:P", 0, 0, NULL },
@@ -45,6 +46,7 @@ const struct cmd_entry cmd_detach_client_entry = {
 
 const struct cmd_entry cmd_suspend_client_entry = {
 	.name = "suspend-client",
+	.description = "Suspend a client.",
 	.alias = "suspendc",
 
 	.args = { "t:", 0, 0, NULL },

cmd-display-menu.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-display-menu.c,v 1.55 2026/09/21 12:14:32 nicm Exp $ */
+/* $OpenBSD: cmd-display-menu.c,v 1.56 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static enum cmd_retval		cmd_display_popup_exec(struct cmd *,
 
 const struct cmd_entry cmd_display_menu_entry = {
 	.name = "display-menu",
+	.description = "Display an interactive menu.",
 	.alias = "menu",
 
 	.args = { "b:c:C:H:s:S:MOt:T:x:y:", 1, -1, cmd_display_menu_args_parse },
@@ -52,6 +53,7 @@ const struct cmd_entry cmd_display_menu_entry = {
 
 const struct cmd_entry cmd_display_popup_entry = {
 	.name = "display-popup",
+	.description = "Create a floating pane (compatibility command).",
 	.alias = "popup",
 
 	.args = { "Bb:Cc:d:e:Eh:ks:S:t:T:w:x:y:", 0, -1, NULL },

cmd-display-message.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-display-message.c,v 1.67 2026/10/02 15:13:07 nicm Exp $ */
+/* $OpenBSD: cmd-display-message.c,v 1.68 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -37,6 +37,7 @@ static enum cmd_retval	cmd_display_message_exec(struct cmd *,
 
 const struct cmd_entry cmd_display_message_entry = {
 	.name = "display-message",
+	.description = "Display a message or expand formats.",
 	.alias = "display",
 
 	.args = { "aCc:d:jlINpt:F:v", 0, 1, NULL },

cmd-find-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-find-window.c,v 1.57 2026/07/14 17:17:17 nicm Exp $ */
+/* $OpenBSD: cmd-find-window.c,v 1.58 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -30,6 +30,7 @@ static enum cmd_retval	cmd_find_window_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_find_window_entry = {
 	.name = "find-window",
+	.description = "Find windows by content or name.",
 	.alias = "findw",
 
 	.args = { "CiNrt:TZ", 1, 1, NULL },

cmd-if-shell.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-if-shell.c,v 1.87 2026/08/25 06:04:33 nicm Exp $ */
+/* $OpenBSD: cmd-if-shell.c,v 1.88 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -40,6 +40,7 @@ static void	cmd_if_shell_free(void *);
 
 const struct cmd_entry cmd_if_shell_entry = {
 	.name = "if-shell",
+	.description = "Run a command conditionally.",
 	.alias = "if",
 
 	.args = { "bFt:", 2, 3, cmd_if_shell_args_parse },

cmd-join-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-join-pane.c,v 1.77 2026/10/07 12:02:21 nicm Exp $ */
+/* $OpenBSD: cmd-join-pane.c,v 1.78 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 George Nachman <tmux@georgester.com>
@@ -36,6 +36,7 @@ static void		cmd_join_pane_mouse_move(struct client *,
 
 const struct cmd_entry cmd_join_pane_entry = {
 	.name = "join-pane",
+	.description = "Move a pane into another window.",
 	.alias = "joinp",
 
 	.args = { "bdfhvp:l:s:t:", 0, 0, NULL },
@@ -50,6 +51,7 @@ const struct cmd_entry cmd_join_pane_entry = {
 
 const struct cmd_entry cmd_move_pane_entry = {
 	.name = "move-pane",
+	.description = "Move a pane or reposition a floating pane.",
 	.alias = "movep",
 
 	.args = { "bdD::fhMvl:L::P:R::s:t:U::X:Y:z:", 0, 0, NULL },

cmd-kill-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-kill-pane.c,v 1.34 2026/06/09 21:22:22 nicm Exp $ */
+/* $OpenBSD: cmd-kill-pane.c,v 1.35 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -34,6 +34,7 @@ static int		cmd_kill_pane_filter(struct cmdq_item *,
 
 const struct cmd_entry cmd_kill_pane_entry = {
 	.name = "kill-pane",
+	.description = "Destroy one or more panes.",
 	.alias = "killp",
 
 	.args = { "af:t:", 0, 0, NULL },

cmd-kill-server.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-kill-server.c,v 1.20 2021/08/21 10:22:39 nicm Exp $ */
+/* $OpenBSD: cmd-kill-server.c,v 1.21 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_kill_server_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_kill_server_entry = {
 	.name = "kill-server",
+	.description = "Stop the tmux server.",
 	.alias = NULL,
 
 	.args = { "", 0, 0, NULL },
@@ -42,6 +43,7 @@ const struct cmd_entry cmd_kill_server_entry = {
 
 const struct cmd_entry cmd_start_server_entry = {
 	.name = "start-server",
+	.description = "Start the tmux server.",
 	.alias = "start",
 
 	.args = { "", 0, 0, NULL },

cmd-kill-session.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-kill-session.c,v 1.31 2026/06/09 12:57:40 nicm Exp $ */
+/* $OpenBSD: cmd-kill-session.c,v 1.32 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static int		cmd_kill_session_filter(struct cmdq_item *,
 
 const struct cmd_entry cmd_kill_session_entry = {
 	.name = "kill-session",
+	.description = "Destroy one or more sessions.",
 	.alias = NULL,
 
 	.args = { "aCgf:t:", 0, 0, NULL },

cmd-kill-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-kill-window.c,v 1.30 2026/06/09 12:57:40 nicm Exp $ */
+/* $OpenBSD: cmd-kill-window.c,v 1.31 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -33,6 +33,7 @@ static int		cmd_kill_window_filter(struct cmdq_item *,
 
 const struct cmd_entry cmd_kill_window_entry = {
 	.name = "kill-window",
+	.description = "Destroy one or more windows.",
 	.alias = "killw",
 
 	.args = { "af:t:", 0, 0, NULL },
@@ -46,6 +47,7 @@ const struct cmd_entry cmd_kill_window_entry = {
 
 const struct cmd_entry cmd_unlink_window_entry = {
 	.name = "unlink-window",
+	.description = "Unlink a window from a session.",
 	.alias = "unlinkw",
 
 	.args = { "kt:", 0, 0, NULL },

cmd-list-buffers.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-buffers.c,v 1.41 2026/02/27 08:25:12 nicm Exp $ */
+/* $OpenBSD: cmd-list-buffers.c,v 1.42 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -34,6 +34,7 @@ static enum cmd_retval	cmd_list_buffers_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_list_buffers_entry = {
 	.name = "list-buffers",
+	.description = "List paste buffers.",
 	.alias = "lsb",
 
 	.args = { "F:f:O:r", 0, 0, NULL },

cmd-list-clients.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-clients.c,v 1.42 2026/02/27 08:25:12 nicm Exp $ */
+/* $OpenBSD: cmd-list-clients.c,v 1.43 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -39,6 +39,7 @@ static enum cmd_retval	cmd_list_clients_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_list_clients_entry = {
 	.name = "list-clients",
+	.description = "List connected clients.",
 	.alias = "lsc",
 
 	.args = { "F:f:O:rt:", 0, 0, NULL },

cmd-list-commands.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-commands.c,v 1.15 2026/02/24 08:22:13 nicm Exp $ */
+/* $OpenBSD: cmd-list-commands.c,v 1.16 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,20 +31,43 @@
 	"#{command_list_name}"					\
 	"#{?command_list_alias, (#{command_list_alias}),} "	\
 	"#{command_list_usage}"
+#define LIST_COMMANDS_HELP_TEMPLATE				\
+	"#{p|#{command_list_name_width}:command_list_name} "	\
+	"#{command_list_description}"
+#define LIST_COMMANDS_VERBOSE_TEMPLATE				\
+	LIST_COMMANDS_TEMPLATE "\n    #{command_list_description}"
 
 static enum cmd_retval cmd_list_commands(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_list_commands_entry = {
 	.name = "list-commands",
+	.description = "List commands or show command syntax.",
 	.alias = "lscm",
 
-	.args = { "F:", 0, 1, NULL },
+	.args = { "F:h", 0, 1, NULL },
-	.usage = "[-F format] [command]",
+	.usage = "[-h] [-F format] [command]",
 
 	.flags = CMD_STARTSERVER|CMD_AFTERHOOK,
 	.exec = cmd_list_commands
 };
 
+static u_int
+cmd_list_commands_get_width(const struct cmd_entry *only)
+{
+	const struct cmd_entry	**entryp;
+	u_int			  width, largest = 0;
+
+	if (only != NULL)
+		return (utf8_cstrwidth(only->name));
+
+	for (entryp = cmd_table; *entryp != NULL; entryp++) {
+		width = utf8_cstrwidth((*entryp)->name);
+		if (width > largest)
+			largest = width;
+	}
+	return (largest);
+}
+
 static void
 cmd_list_single_command(const struct cmd_entry *entry, struct format_tree *ft,
     const char *template, struct cmdq_item *item)
@@ -63,6 +86,11 @@ cmd_list_single_command(const struct cmd_entry *entry, struct format_tree *ft,
 	else
 		s = "";
 	format_add(ft, "command_list_usage", "%s", s);
+	if (entry->description != NULL)
+		s = entry->description;
+	else
+		s = "";
+	format_add(ft, "command_list_description", "%s", s);
 
 	line = format_expand(ft, template);
 	if (*line != '\0')
@@ -75,33 +103,44 @@ cmd_list_commands(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		 *args = cmd_get_args(self);
 	const struct cmd_entry	**entryp;
-	const struct cmd_entry	 *entry;
+	const struct cmd_entry	 *entry = NULL;
 	struct format_tree	 *ft;
 	const char		 *template,  *command;
 	char			 *cause;
+	int			  help;
+	u_int			  width;
 
-	if ((template = args_get(args, 'F')) == NULL)
+	if ((template = args_get(args, 'F')) == NULL) {
-		template = LIST_COMMANDS_TEMPLATE;
+		help = args_has(args, 'h');
-
+		if (help > 1)
-	ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
+			template = LIST_COMMANDS_VERBOSE_TEMPLATE;
-	format_defaults(ft, NULL, NULL, NULL, NULL);
+		else if (help == 1)
+			template = LIST_COMMANDS_HELP_TEMPLATE;
+		else
+			template = LIST_COMMANDS_TEMPLATE;
+	}
 
 	command = args_string(args, 0);
-	if (command == NULL) {
+	if (command != NULL) {
-		for (entryp = cmd_table; *entryp != NULL; entryp++)
-			cmd_list_single_command(*entryp, ft, template, item);
-	} else {
 		entry = cmd_find(command, &cause);
-		if (entry != NULL)
+		if (entry == NULL) {
-			cmd_list_single_command(entry, ft, template, item);
-		else {
 			cmdq_error(item, "%s", cause);
 			free(cause);
-			format_free(ft);
 			return (CMD_RETURN_ERROR);
 		}
 	}
 
+	ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
+	format_defaults(ft, NULL, NULL, NULL, NULL);
+	width = cmd_list_commands_get_width(entry);
+	format_add(ft, "command_list_name_width", "%u", width);
+
+	if (entry == NULL) {
+		for (entryp = cmd_table; *entryp != NULL; entryp++)
+			cmd_list_single_command(*entryp, ft, template, item);
+	} else
+		cmd_list_single_command(entry, ft, template, item);
+
 	format_free(ft);
 	return (CMD_RETURN_NORMAL);
 }

cmd-list-keys.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-keys.c,v 1.78 2026/07/01 13:12:17 nicm Exp $ */
+/* $OpenBSD: cmd-list-keys.c,v 1.79 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -42,6 +42,7 @@ static enum cmd_retval cmd_list_keys_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_list_keys_entry = {
 	.name = "list-keys",
+	.description = "List key bindings.",
 	.alias = "lsk",
 
 	.args = { "1aF:NO:P:rT:", 0, 1, NULL },

cmd-list-panes.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-panes.c,v 1.41 2026/09/08 10:20:08 nicm Exp $ */
+/* $OpenBSD: cmd-list-panes.c,v 1.42 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static void	cmd_list_panes_window(struct cmd *, struct session *,
 
 const struct cmd_entry cmd_list_panes_entry = {
 	.name = "list-panes",
+	.description = "List panes and their state.",
 	.alias = "lsp",
 
 	.args = { "aF:f:O:rst:", 0, 0, NULL },

cmd-list-sessions.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-sessions.c,v 1.37 2026/09/08 10:20:08 nicm Exp $ */
+/* $OpenBSD: cmd-list-sessions.c,v 1.38 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -40,6 +40,7 @@ static enum cmd_retval	cmd_list_sessions_exec(struct cmd *,
 
 const struct cmd_entry cmd_list_sessions_entry = {
 	.name = "list-sessions",
+	.description = "List sessions and their state.",
 	.alias = "ls",
 
 	.args = { "F:f:O:r", 0, 0, NULL },

cmd-list-windows.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-list-windows.c,v 1.51 2026/09/08 10:20:08 nicm Exp $ */
+/* $OpenBSD: cmd-list-windows.c,v 1.52 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -43,6 +43,7 @@ static enum cmd_retval	cmd_list_windows_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_list_windows_entry = {
 	.name = "list-windows",
+	.description = "List windows and their state.",
 	.alias = "lsw",
 
 	.args = { "aF:f:O:rt:", 0, 0, NULL },

cmd-load-buffer.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-load-buffer.c,v 1.67 2026/10/08 07:06:26 nicm Exp $ */
+/* $OpenBSD: cmd-load-buffer.c,v 1.68 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -35,6 +35,7 @@ static enum cmd_retval	cmd_load_buffer_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_load_buffer_entry = {
 	.name = "load-buffer",
+	.description = "Load a file into a paste buffer.",
 	.alias = "loadb",
 
 	.args = { "b:t:w", 1, 1, NULL },

cmd-lock-server.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-lock-server.c,v 1.31 2021/08/21 10:22:39 nicm Exp $ */
+/* $OpenBSD: cmd-lock-server.c,v 1.32 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -28,6 +28,7 @@ static enum cmd_retval	cmd_lock_server_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_lock_server_entry = {
 	.name = "lock-server",
+	.description = "Lock every client.",
 	.alias = "lock",
 
 	.args = { "", 0, 0, NULL },
@@ -39,6 +40,7 @@ const struct cmd_entry cmd_lock_server_entry = {
 
 const struct cmd_entry cmd_lock_session_entry = {
 	.name = "lock-session",
+	.description = "Lock every client attached to a session.",
 	.alias = "locks",
 
 	.args = { "t:", 0, 0, NULL },
@@ -52,6 +54,7 @@ const struct cmd_entry cmd_lock_session_entry = {
 
 const struct cmd_entry cmd_lock_client_entry = {
 	.name = "lock-client",
+	.description = "Lock a client.",
 	.alias = "lockc",
 
 	.args = { "t:", 0, 0, NULL },

cmd-move-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-move-window.c,v 1.34 2021/08/21 10:22:39 nicm Exp $ */
+/* $OpenBSD: cmd-move-window.c,v 1.35 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -30,6 +30,7 @@ static enum cmd_retval	cmd_move_window_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_move_window_entry = {
 	.name = "move-window",
+	.description = "Move a window between sessions.",
 	.alias = "movew",
 
 	.args = { "abdkrs:t:", 0, 0, NULL },
@@ -44,6 +45,7 @@ const struct cmd_entry cmd_move_window_entry = {
 
 const struct cmd_entry cmd_link_window_entry = {
 	.name = "link-window",
+	.description = "Link a window into another session.",
 	.alias = "linkw",
 
 	.args = { "abdks:t:", 0, 0, NULL },

cmd-new-session.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-new-session.c,v 1.152 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: cmd-new-session.c,v 1.153 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -37,6 +37,7 @@ static enum cmd_retval	cmd_new_session_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_new_session_entry = {
 	.name = "new-session",
+	.description = "Create a new session.",
 	.alias = "new",
 
 	.args = { "Ac:dDe:EF:f:n:Ps:t:x:Xy:", 0, -1, NULL },
@@ -53,6 +54,7 @@ const struct cmd_entry cmd_new_session_entry = {
 
 const struct cmd_entry cmd_has_session_entry = {
 	.name = "has-session",
+	.description = "Check whether a session exists.",
 	.alias = "has",
 
 	.args = { "t:", 0, 0, NULL },

cmd-new-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-new-window.c,v 1.104 2026/09/03 21:04:11 nicm Exp $ */
+/* $OpenBSD: cmd-new-window.c,v 1.105 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static enum cmd_retval	cmd_new_window_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_new_window_entry = {
 	.name = "new-window",
+	.description = "Create a window.",
 	.alias = "neww",
 
 	.args = { "abc:de:EF:kn:PSt:", 0, -1, NULL },

cmd-paste-buffer.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-paste-buffer.c,v 1.44 2026/03/04 07:19:32 tb Exp $ */
+/* $OpenBSD: cmd-paste-buffer.c,v 1.45 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_paste_buffer_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_paste_buffer_entry = {
 	.name = "paste-buffer",
+	.description = "Paste a buffer into a pane.",
 	.alias = "pasteb",
 
 	.args = { "db:prSs:t:", 0, 0, NULL },

cmd-pipe-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-pipe-pane.c,v 1.64 2026/07/27 14:25:46 nicm Exp $ */
+/* $OpenBSD: cmd-pipe-pane.c,v 1.65 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -41,6 +41,7 @@ static void cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
 
 const struct cmd_entry cmd_pipe_pane_entry = {
 	.name = "pipe-pane",
+	.description = "Pipe pane input or output to a command.",
 	.alias = "pipep",
 
 	.args = { "IOot:", 0, 1, NULL },

cmd-refresh-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-refresh-client.c,v 1.55 2026/07/17 08:37:29 nicm Exp $ */
+/* $OpenBSD: cmd-refresh-client.c,v 1.56 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_refresh_client_exec(struct cmd *,
 
 const struct cmd_entry cmd_refresh_client_entry = {
 	.name = "refresh-client",
+	.description = "Refresh or resize a client.",
 	.alias = "refresh",
 
 	.args = { "A:B:cC:Df:r:F:lLRSt:U", 0, 1, NULL },

cmd-rename-session.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-rename-session.c,v 1.39 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: cmd-rename-session.c,v 1.40 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_rename_session_exec(struct cmd *,
 
 const struct cmd_entry cmd_rename_session_entry = {
 	.name = "rename-session",
+	.description = "Rename a session.",
 	.alias = "rename",
 
 	.args = { "t:", 1, 1, NULL },

cmd-rename-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-rename-window.c,v 1.30 2026/06/29 18:17:28 nicm Exp $ */
+/* $OpenBSD: cmd-rename-window.c,v 1.31 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_rename_window_exec(struct cmd *,
 
 const struct cmd_entry cmd_rename_window_entry = {
 	.name = "rename-window",
+	.description = "Rename a window.",
 	.alias = "renamew",
 
 	.args = { "t:", 1, 1, NULL },

cmd-resize-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-resize-pane.c,v 1.70 2026/10/02 12:48:52 nicm Exp $ */
+/* $OpenBSD: cmd-resize-pane.c,v 1.71 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -39,6 +39,7 @@ static void		cmd_resize_pane_mouse_resize_tiled(struct client *,
 
 const struct cmd_entry cmd_resize_pane_entry = {
 	.name = "resize-pane",
+	.description = "Resize or zoom a pane.",
 	.alias = "resizep",
 
 	.args = { "D::L::MR::Tt:U::x:y:Z", 0, 1, NULL },

cmd-resize-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-resize-window.c,v 1.10 2023/06/30 13:19:32 nicm Exp $ */
+/* $OpenBSD: cmd-resize-window.c,v 1.11 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2018 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_resize_window_exec(struct cmd *,
 
 const struct cmd_entry cmd_resize_window_entry = {
 	.name = "resize-window",
+	.description = "Resize a window.",
 	.alias = "resizew",
 
 	.args = { "aADLRt:Ux:y:", 0, 1, NULL },

cmd-respawn-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-respawn-pane.c,v 1.40 2026/07/03 16:09:49 nicm Exp $ */
+/* $OpenBSD: cmd-respawn-pane.c,v 1.41 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_respawn_pane_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_respawn_pane_entry = {
 	.name = "respawn-pane",
+	.description = "Restart a pane's command.",
 	.alias = "respawnp",
 
 	.args = { "c:e:Ekt:", 0, -1, NULL },

cmd-respawn-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-respawn-window.c,v 1.51 2026/07/03 16:09:49 nicm Exp $ */
+/* $OpenBSD: cmd-respawn-window.c,v 1.52 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_respawn_window_exec(struct cmd *,
 
 const struct cmd_entry cmd_respawn_window_entry = {
 	.name = "respawn-window",
+	.description = "Restart every pane in a window.",
 	.alias = "respawnw",
 
 	.args = { "c:e:Ekt:", 0, -1, NULL },

cmd-rotate-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-rotate-window.c,v 1.34 2026/06/22 08:47:45 nicm Exp $ */
+/* $OpenBSD: cmd-rotate-window.c,v 1.35 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -29,6 +29,7 @@ static enum cmd_retval	cmd_rotate_window_exec(struct cmd *,
 
 const struct cmd_entry cmd_rotate_window_entry = {
 	.name = "rotate-window",
+	.description = "Rotate panes in a window.",
 	.alias = "rotatew",
 
 	.args = { "Dt:UZ", 0, 0, NULL },

cmd-run-shell.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-run-shell.c,v 1.95 2026/09/20 07:59:55 nicm Exp $ */
+/* $OpenBSD: cmd-run-shell.c,v 1.96 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -42,6 +42,7 @@ static void	cmd_run_shell_print(struct job *, const char *);
 
 const struct cmd_entry cmd_run_shell_entry = {
 	.name = "run-shell",
+	.description = "Run a shell command.",
 	.alias = "run",
 
 	.args = { "bd:Ct:Es:c:", 0, -1, cmd_run_shell_args_parse },

cmd-save-buffer.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-save-buffer.c,v 1.57 2025/10/28 07:32:26 nicm Exp $ */
+/* $OpenBSD: cmd-save-buffer.c,v 1.58 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
@@ -35,6 +35,7 @@ static enum cmd_retval	cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_save_buffer_entry = {
 	.name = "save-buffer",
+	.description = "Save a paste buffer to a file.",
 	.alias = "saveb",
 
 	.args = { "ab:", 1, 1, NULL },
@@ -46,6 +47,7 @@ const struct cmd_entry cmd_save_buffer_entry = {
 
 const struct cmd_entry cmd_show_buffer_entry = {
 	.name = "show-buffer",
+	.description = "Print a paste buffer.",
 	.alias = "showb",
 
 	.args = { "b:", 0, 0, NULL },

cmd-select-layout.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-select-layout.c,v 1.45 2026/09/09 07:03:39 nicm Exp $ */
+/* $OpenBSD: cmd-select-layout.c,v 1.46 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_select_layout_exec(struct cmd *,
 
 const struct cmd_entry cmd_select_layout_entry = {
 	.name = "select-layout",
+	.description = "Choose or apply a layout.",
 	.alias = "selectl",
 
 	.args = { "Enopt:", 0, 1, NULL },
@@ -44,6 +45,7 @@ const struct cmd_entry cmd_select_layout_entry = {
 
 const struct cmd_entry cmd_next_layout_entry = {
 	.name = "next-layout",
+	.description = "Select the next layout.",
 	.alias = "nextl",
 
 	.args = { "t:", 0, 0, NULL },
@@ -57,6 +59,7 @@ const struct cmd_entry cmd_next_layout_entry = {
 
 const struct cmd_entry cmd_previous_layout_entry = {
 	.name = "previous-layout",
+	.description = "Select the previous layout.",
 	.alias = "prevl",
 
 	.args = { "t:", 0, 0, NULL },

cmd-select-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-select-pane.c,v 1.78 2026/08/20 09:19:24 nicm Exp $ */
+/* $OpenBSD: cmd-select-pane.c,v 1.79 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_select_pane_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_select_pane_entry = {
 	.name = "select-pane",
+	.description = "Select or mark a pane.",
 	.alias = "selectp",
 
 	.args = { "DdegLlMmP:RT:t:UZ", 0, 0, NULL }, /* -P and -g deprecated */
@@ -44,6 +45,7 @@ const struct cmd_entry cmd_select_pane_entry = {
 
 const struct cmd_entry cmd_last_pane_entry = {
 	.name = "last-pane",
+	.description = "Select the previously active pane.",
 	.alias = "lastp",
 
 	.args = { "det:Z", 0, 0, NULL },

cmd-select-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-select-window.c,v 1.30 2021/08/21 10:22:39 nicm Exp $ */
+/* $OpenBSD: cmd-select-window.c,v 1.31 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_select_window_exec(struct cmd *,
 
 const struct cmd_entry cmd_select_window_entry = {
 	.name = "select-window",
+	.description = "Select a window.",
 	.alias = "selectw",
 
 	.args = { "lnpTt:", 0, 0, NULL },
@@ -44,6 +45,7 @@ const struct cmd_entry cmd_select_window_entry = {
 
 const struct cmd_entry cmd_next_window_entry = {
 	.name = "next-window",
+	.description = "Select the next window.",
 	.alias = "next",
 
 	.args = { "at:", 0, 0, NULL },
@@ -57,6 +59,7 @@ const struct cmd_entry cmd_next_window_entry = {
 
 const struct cmd_entry cmd_previous_window_entry = {
 	.name = "previous-window",
+	.description = "Select the previous window.",
 	.alias = "prev",
 
 	.args = { "at:", 0, 0, NULL },
@@ -70,6 +73,7 @@ const struct cmd_entry cmd_previous_window_entry = {
 
 const struct cmd_entry cmd_last_window_entry = {
 	.name = "last-window",
+	.description = "Select the previously active window.",
 	.alias = "last",
 
 	.args = { "t:", 0, 0, NULL },

cmd-send-keys.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-send-keys.c,v 1.81 2026/06/11 19:13:34 nicm Exp $ */
+/* $OpenBSD: cmd-send-keys.c,v 1.82 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_send_keys_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_send_keys_entry = {
 	.name = "send-keys",
+	.description = "Send keys to a pane or client.",
 	.alias = "send",
 
 	.args = { "c:FHKlMN:Rt:X", 0, -1, NULL },
@@ -46,6 +47,7 @@ const struct cmd_entry cmd_send_keys_entry = {
 
 const struct cmd_entry cmd_send_prefix_entry = {
 	.name = "send-prefix",
+	.description = "Send the prefix key to a pane.",
 	.alias = NULL,
 
 	.args = { "2t:", 0, 0, NULL },

cmd-server-access.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-server-access.c,v 1.6 2026/06/09 12:58:40 nicm Exp $ */
+/* $OpenBSD: cmd-server-access.c,v 1.7 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2021 Dallas Lyons <dallasdlyons@gmail.com>
@@ -36,6 +36,7 @@ static enum cmd_retval cmd_server_access_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_server_access_entry = {
 	.name = "server-access",
+	.description = "Manage access to the tmux server.",
 	.alias = NULL,
 
 	.args = { "adglrw", 0, 1, NULL },

cmd-set-buffer.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-set-buffer.c,v 1.38 2026/08/24 07:05:23 nicm Exp $ */
+/* $OpenBSD: cmd-set-buffer.c,v 1.39 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -31,6 +31,7 @@ static enum cmd_retval	cmd_set_buffer_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_set_buffer_entry = {
 	.name = "set-buffer",
+	.description = "Create or modify a paste buffer.",
 	.alias = "setb",
 
 	.args = { "ab:t:n:w", 0, 1, NULL },
@@ -43,6 +44,7 @@ const struct cmd_entry cmd_set_buffer_entry = {
 
 const struct cmd_entry cmd_delete_buffer_entry = {
 	.name = "delete-buffer",
+	.description = "Delete a paste buffer.",
 	.alias = "deleteb",
 
 	.args = { "b:", 0, 0, NULL },

cmd-set-environment.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-set-environment.c,v 1.29 2025/04/09 06:27:43 nicm Exp $ */
+/* $OpenBSD: cmd-set-environment.c,v 1.30 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval	cmd_set_environment_exec(struct cmd *,
 
 const struct cmd_entry cmd_set_environment_entry = {
 	.name = "set-environment",
+	.description = "Set or remove an environment variable.",
 	.alias = "setenv",
 
 	.args = { "Fhgrt:u", 1, 2, NULL },

cmd-set-option.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-set-option.c,v 1.146 2026/07/10 15:20:06 nicm Exp $ */
+/* $OpenBSD: cmd-set-option.c,v 1.147 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -38,6 +38,7 @@ static enum cmd_retval		cmd_set_hook_monitor_exec(struct cmdq_item *,
 
 const struct cmd_entry cmd_set_option_entry = {
 	.name = "set-option",
+	.description = "Set a server, session, or pane option.",
 	.alias = "set",
 
 	.args = { "aFgopqst:uUw", 1, 2, cmd_set_option_args_parse },
@@ -51,6 +52,7 @@ const struct cmd_entry cmd_set_option_entry = {
 
 const struct cmd_entry cmd_set_window_option_entry = {
 	.name = "set-window-option",
+	.description = "Set a window option.",
 	.alias = "setw",
 
 	.args = { "aFgoqt:u", 1, 2, cmd_set_option_args_parse },
@@ -64,6 +66,7 @@ const struct cmd_entry cmd_set_window_option_entry = {
 
 const struct cmd_entry cmd_set_hook_entry = {
 	.name = "set-hook",
+	.description = "Set or remove a hook.",
 	.alias = NULL,
 
 	.args = { "agpERTt:uB:w", 0, 2, cmd_set_option_args_parse },

cmd-show-environment.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-show-environment.c,v 1.29 2025/04/09 06:27:43 nicm Exp $ */
+/* $OpenBSD: cmd-show-environment.c,v 1.30 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static void	 cmd_show_environment_print(struct cmd *, struct cmdq_item *,
 
 const struct cmd_entry cmd_show_environment_entry = {
 	.name = "show-environment",
+	.description = "Show environment variables.",
 	.alias = "showenv",
 
 	.args = { "hgst:", 0, 1, NULL },

cmd-show-messages.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-show-messages.c,v 1.37 2025/11/18 08:37:54 nicm Exp $ */
+/* $OpenBSD: cmd-show-messages.c,v 1.38 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -36,6 +36,7 @@ static enum cmd_retval	cmd_show_messages_exec(struct cmd *,
 
 const struct cmd_entry cmd_show_messages_entry = {
 	.name = "show-messages",
+	.description = "Show server and client messages.",
 	.alias = "showmsgs",
 
 	.args = { "JTt:", 0, 0, NULL },

cmd-show-options.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-show-options.c,v 1.76 2026/07/27 19:15:58 nicm Exp $ */
+/* $OpenBSD: cmd-show-options.c,v 1.77 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -49,6 +49,7 @@ static enum cmd_retval	cmd_show_options_all(struct cmd *, struct cmdq_item *,
 
 const struct cmd_entry cmd_show_options_entry = {
 	.name = "show-options",
+	.description = "Show server, session, or pane options.",
 	.alias = "show",
 
 	.args = { "AgF:Hpqst:vw", 0, 1, NULL },
@@ -62,6 +63,7 @@ const struct cmd_entry cmd_show_options_entry = {
 
 const struct cmd_entry cmd_show_window_options_entry = {
 	.name = "show-window-options",
+	.description = "Show window options.",
 	.alias = "showw",
 
 	.args = { "F:gvt:", 0, 1, NULL },
@@ -75,6 +77,7 @@ const struct cmd_entry cmd_show_window_options_entry = {
 
 const struct cmd_entry cmd_show_hooks_entry = {
 	.name = "show-hooks",
+	.description = "Show hooks.",
 	.alias = NULL,
 
 	.args = { "BF:gpt:w", 0, 1, NULL },

cmd-show-prompt-history.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-show-prompt-history.c,v 1.5 2026/06/25 11:39:11 nicm Exp $ */
+/* $OpenBSD: cmd-show-prompt-history.c,v 1.6 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2021 Anindya Mukherjee <anindya49@hotmail.com>
@@ -29,6 +29,7 @@ static enum cmd_retval	cmd_show_prompt_history_exec(struct cmd *,
 
 const struct cmd_entry cmd_show_prompt_history_entry = {
 	.name = "show-prompt-history",
+	.description = "Show interactive prompt history.",
 	.alias = "showphist",
 
 	.args = { "T:", 0, 0, NULL },
@@ -40,6 +41,7 @@ const struct cmd_entry cmd_show_prompt_history_entry = {
 
 const struct cmd_entry cmd_clear_prompt_history_entry = {
 	.name = "clear-prompt-history",
+	.description = "Clear interactive prompt history.",
 	.alias = "clearphist",
 
 	.args = { "T:", 0, 0, NULL },

cmd-source-file.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-source-file.c,v 1.63 2026/08/18 08:05:05 nicm Exp $ */
+/* $OpenBSD: cmd-source-file.c,v 1.64 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Tiago Cunha <me@tiagocunha.org>
@@ -37,6 +37,7 @@ static enum cmd_retval	cmd_source_file_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_source_file_entry = {
 	.name = "source-file",
+	.description = "Load commands from a configuration file.",
 	.alias = "source",
 
 	.args = { "t:Fnqv", 1, -1, NULL },

cmd-split-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-split-window.c,v 1.152 2026/10/02 12:48:52 nicm Exp $ */
+/* $OpenBSD: cmd-split-window.c,v 1.153 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -38,6 +38,7 @@ static void		cmd_split_window_mouse_resize(struct client *,
 
 const struct cmd_entry cmd_new_pane_entry = {
 	.name = "new-pane",
+	.description = "Create a floating pane.",
 	.alias = "newp",
 
 	.args = { "AbB:Cc:Dde:EfF:hIkl:KLMm:Op:PR:s:S:t:T:vWx:X:y:Y:Z", 0, -1, NULL },
@@ -57,6 +58,7 @@ const struct cmd_entry cmd_new_pane_entry = {
 
 const struct cmd_entry cmd_split_window_entry = {
 	.name = "split-window",
+	.description = "Create a new pane by splitting a window.",
 	.alias = "splitw",
 
 	.args = { "bB:c:de:EfF:hIkl:m:p:PR:s:S:t:T:vWZ", 0, -1, NULL },

cmd-swap-pane.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-swap-pane.c,v 1.56 2026/10/02 12:23:44 nicm Exp $ */
+/* $OpenBSD: cmd-swap-pane.c,v 1.57 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -30,6 +30,7 @@ static enum cmd_retval	cmd_swap_pane_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_swap_pane_entry = {
 	.name = "swap-pane",
+	.description = "Swap two panes.",
 	.alias = "swapp",
 
 	.args = { "dDs:t:UZ", 0, 0, NULL },

cmd-swap-window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-swap-window.c,v 1.30 2026/07/27 08:03:01 nicm Exp $ */
+/* $OpenBSD: cmd-swap-window.c,v 1.31 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -30,6 +30,7 @@ static enum cmd_retval	cmd_swap_window_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_swap_window_entry = {
 	.name = "swap-window",
+	.description = "Swap two windows.",
 	.alias = "swapw",
 
 	.args = { "ds:t:", 0, 0, NULL },

cmd-switch-client.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-switch-client.c,v 1.75 2026/08/20 09:19:24 nicm Exp $ */
+/* $OpenBSD: cmd-switch-client.c,v 1.76 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -33,6 +33,7 @@ static enum cmd_retval	cmd_switch_client_exec(struct cmd *,
 
 const struct cmd_entry cmd_switch_client_entry = {
 	.name = "switch-client",
+	.description = "Switch a client to another session.",
 	.alias = "switchc",
 
 	.args = { "c:EFlnO:pt:rT:Z", 0, 0, NULL },

cmd-unbind-key.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-unbind-key.c,v 1.34 2021/08/21 10:22:39 nicm Exp $ */
+/* $OpenBSD: cmd-unbind-key.c,v 1.35 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -30,6 +30,7 @@ static enum cmd_retval	cmd_unbind_key_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_unbind_key_entry = {
 	.name = "unbind-key",
+	.description = "Remove key bindings.",
 	.alias = "unbind",
 
 	.args = { "anqT:", 0, 1, NULL },

cmd-wait-for.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-wait-for.c,v 1.24 2026/09/22 06:46:50 nicm Exp $ */
+/* $OpenBSD: cmd-wait-for.c,v 1.25 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2013 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -32,6 +32,7 @@ static enum cmd_retval cmd_wait_for_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_wait_for_entry = {
 	.name = "wait-for",
+	.description = "Wait for or signal named channels and events.",
 	.alias = "wait",
 
 	.args = { "EF:LSUlvw:", 1, 1, NULL },

options-table.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.251 2026/10/07 12:59:50 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.252 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -329,7 +329,8 @@ const struct options_table_entry options_table[] = {
 			 "server-info=show-messages -JT,"
 			 "info=show-messages -JT,"
 			 "choose-window=choose-tree -w,"
-			 "choose-session=choose-tree -s",
+			 "choose-session=choose-tree -s,"
+			 "help=list-commands -h",
 	  .separator = ",",
 	  .text = "Array of command aliases. "
 		  "Each entry is an alias and a command separated by '='."

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1181 2026/10/08 07:50:05 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1182 2026/10/09 13:12:14 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: October 8 2026 $
+.Dd $Mdocdate: October 9 2026 $
 .Dt TMUX 1
 .Os
 .Sh NAME
@@ -1271,6 +1271,7 @@ If
 is specified, list only clients connected to that session.
 .Tg lscm
 .It Xo Ic list\-commands
+.Op Fl h
 .Op Fl F Ar format
 .Op Ar command
 .Xc
@@ -1279,6 +1280,11 @@ List the syntax of
 .Ar command
 or - if omitted - of all commands supported by
 .Nm .
+With
+.Fl h ,
+show command names and a short description.
+.Fl h
+twice shows syntax as well.
 .Tg ls
 .It Xo Ic list\-sessions
 .Op Fl r
@@ -7419,7 +7425,9 @@ The following variables are available, where appropriate:
 .It Li "client_written" Ta "" Ta "Bytes written to client"
 .It Li "command" Ta "" Ta "Name of command in use, if any"
 .It Li "command_list_alias" Ta "" Ta "Command alias if listing commands"
+.It Li "command_list_description" Ta "" Ta "Command description if listing commands"
 .It Li "command_list_name" Ta "" Ta "Command name if listing commands"
+.It Li "command_list_name_width" Ta "" Ta "Maximum command name width in list"
 .It Li "command_list_usage" Ta "" Ta "Command usage if listing commands"
 .It Li "config_files" Ta "" Ta "List of configuration files loaded"
 .It Li "cursor_blinking" Ta "" Ta "1 if the cursor is blinking"

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1454 2026/10/08 07:50:05 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1455 2026/10/09 13:12:14 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2075,6 +2075,7 @@ struct cmd_entry_flag {
 /* Command definition. */
 struct cmd_entry {
 	const char		*name;
+	const char		*description;
 	const char		*alias;
 
 	struct args_parse	 args;