Added a shared escape decoder for keybinding Data fields so key actions can interpret \n, \r, \t, \\, and hex-byte escapes like \x1e (raw byte insertion), with graceful fallback for invalid/unknown escapes. This is what enables entering strikethrough control byte 0x1E via keybindings (e.g., Data 1: \x1e).

Updated Run Command to use the shared decoder instead of its previous newline-only parser, so it now supports the same escape set consistently.
Updated Insert in Buffer to decode escapes before insertion, so \xNN inserts raw bytes rather than literal text.
Updated key action help text to document the supported escape syntax for both Run Command and Insert in Buffer.

src/fe-gtk/fkeys.c

@@ -150,14 +150,77 @@ static int key_action_put_history (GtkWidget * wid, GdkEventKey * evt,
 
 static GSList *keybind_list = NULL;
 
+static gsize
+key_action_decode_escapes (const char *input, char *output)
+{
+	gsize ii;
+	gsize oi = 0;
+	gsize len = strlen (input);
+
+	for (ii = 0; ii < len; ii++)
+	{
+		if (input[ii] != '\\')
+		{
+			output[oi++] = input[ii];
+			continue;
+		}
+
+		if (ii + 1 >= len)
+		{
+			output[oi++] = '\\';
+			break;
+		}
+
+		ii++;
+
+		switch (input[ii])
+		{
+		case 'n':
+			output[oi++] = '\n';
+			break;
+		case 'r':
+			output[oi++] = '\r';
+			break;
+		case 't':
+			output[oi++] = '\t';
+			break;
+		case '\\':
+			output[oi++] = '\\';
+			break;
+		case 'x':
+			if (ii + 2 < len && g_ascii_isxdigit (input[ii + 1]) &&
+				 g_ascii_isxdigit (input[ii + 2]))
+			{
+				output[oi++] =
+					(g_ascii_xdigit_value (input[ii + 1]) << 4) |
+					 g_ascii_xdigit_value (input[ii + 2]);
+				ii += 2;
+			}
+			else
+			{
+				output[oi++] = '\\';
+				output[oi++] = 'x';
+			}
+			break;
+		default:
+			output[oi++] = '\\';
+			output[oi++] = input[ii];
+			break;
+		}
+	}
+
+	output[oi] = 0;
+	return oi;
+}
+
 static const struct key_action key_actions[KEY_MAX_ACTIONS + 1] = {
 
 	{key_action_handle_command, "Run Command",
-	 N_("The \002Run Command\002 action runs the data in Data 1 as if it had been typed into the entry box where you pressed the key sequence. Thus it can contain text (which will be sent to the channel/person), commands or user commands. When run all \002\\n\002 characters in Data 1 are used to deliminate separate commands so it is possible to run more than one command. If you want a \002\\\002 in the actual text run then enter \002\\\\\002")},
+	 N_("The \002Run Command\002 action runs the data in Data 1 as if it had been typed into the entry box where you pressed the key sequence. Thus it can contain text (which will be sent to the channel/person), commands or user commands. Escapes in Data 1 are interpreted (for example \002\\n\002, \002\\r\002, \002\\t\002, \002\\xNN\002 and \002\\\\\002), so it is possible to run more than one command by using newlines.")},
 	{key_action_page_switch, "Change Page",
 	 N_("The \002Change Page\002 command switches between pages in the notebook. Set Data 1 to the page you want to switch to. If Data 2 is set to anything then the switch will be relative to the current position. Set Data 1 to auto to switch to the page with the most recent and important activity (queries first, then channels with hilight, channels with dialogue, channels with other data)")},
 	{key_action_insert, "Insert in Buffer",
-	 N_("The \002Insert in Buffer\002 command will insert the contents of Data 1 into the entry where the key sequence was pressed at the current cursor position")},
+	 N_("The \002Insert in Buffer\002 command will insert the contents of Data 1 into the entry where the key sequence was pressed at the current cursor position. Escapes in Data 1 are interpreted (for example \002\\n\002, \002\\r\002, \002\\t\002, \002\\xNN\002 and \002\\\\\002).")},
 	{key_action_scroll_page, "Scroll Page",
 	 N_("The \002Scroll Page\002 command scrolls the text widget up or down one page or one line. Set Data 1 to either Top, Bottom, Up, Down, +1 or -1.")},
 	{key_action_set_buffer, "Set Buffer",
@@ -1162,38 +1225,16 @@ static int
 key_action_handle_command (GtkWidget * wid, GdkEventKey * evt, char *d1,
 									char *d2, struct session *sess)
 {
-	int ii, oi, len;
-	char out[2048], d = 0;
+	char *out;
 
 	if (!d1)
 		return 0;
 
-	len = strlen (d1);
-
-	/* Replace each "\n" substring with '\n' */
-	for (ii = oi = 0; ii < len; ii++)
-	{
-		d = d1[ii];
-		if (d == '\\')
-		{
-			ii++;
-			d = d1[ii];
-			if (d == 'n')
-				out[oi++] = '\n';
-			else if (d == '\\')
-				out[oi++] = '\\';
-			else
-			{
-				out[oi++] = '\\';
-				out[oi++] = d;
-			}
-			continue;
-		}
-		out[oi++] = d;
-	}
-	out[oi] = 0;
+	out = g_malloc (strlen (d1) + 1);
+	key_action_decode_escapes (d1, out);
 
 	handle_multiline (sess, out, 0, 0);
+	g_free (out);
 	return 0;
 }
 
@@ -1275,13 +1316,19 @@ key_action_insert (GtkWidget * wid, GdkEventKey * evt, char *d1, char *d2,
 						 struct session *sess)
 {
 	int tmp_pos;
+	char *decoded;
+	gsize decoded_len;
 
 	if (!d1)
 		return 1;
 
+	decoded = g_malloc (strlen (d1) + 1);
+	decoded_len = key_action_decode_escapes (d1, decoded);
+
 	tmp_pos = SPELL_ENTRY_GET_POS (wid);
-	SPELL_ENTRY_INSERT (wid, d1, strlen (d1), &tmp_pos);
+	SPELL_ENTRY_INSERT (wid, decoded, decoded_len, &tmp_pos);
 	SPELL_ENTRY_SET_POS (wid, tmp_pos);
+	g_free (decoded);
 	return 2;
 }