Add e key to open editor to customize mode (like buffer mode) and a key

to show only changed items.

hooks.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: hooks.c,v 1.13 2026/07/10 15:20:06 nicm Exp $ */
+/* $OpenBSD: hooks.c,v 1.14 2026/07/13 22:03:08 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -264,6 +264,19 @@ hooks_add_event(const char *name)
 	TAILQ_INSERT_TAIL(&hooks_events, he, entry);
 }
 
+/* Return if a hook event sink exists. */
+int
+hooks_is_event(const char *name)
+{
+	struct hooks_event	*he;
+
+	TAILQ_FOREACH(he, &hooks_events, entry) {
+		if (strcmp(he->name, name) == 0)
+			return (1);
+	}
+	return (0);
+}
+
 /* Return if an event name can be fired through the hooks path. */
 int
 hooks_valid_event_name(const char *name)

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1137 2026/07/13 16:30:28 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1138 2026/07/13 22:03:08 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -3087,6 +3087,7 @@ The following keys may be used in customize mode:
 .It Li "w" Ta "Set window option value, if option is for pane and window"
 .It Li "d" Ta "Set an option or key to the default"
 .It Li "D" Ta "Set tagged options and tagged keys to the default"
+.It Li "e" Ta "Open the value in an editor"
 .It Li "u" Ta "Unset an option (set to default value if global) or unbind a key"
 .It Li "U" Ta "Unset tagged options and unbind tagged keys"
 .It Li "C\-s" Ta "Search by name"

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1401 2026/07/13 16:07:47 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1402 2026/07/13 22:03:08 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2709,6 +2709,7 @@ char	*format_trim_right(const char *, u_int);
 
 /* hooks.c */
 void	 hooks_add_event(const char *);
+int	 hooks_is_event(const char *);
 int	 hooks_valid_event_name(const char *);
 void	 hooks_build_events(void);
 void	 hooks_run(struct cmdq_item *, const char *);