Please find below an update for devel/cli11 to version 2.6.0.

Tested consumers:
cad/freecad
graphics/vtk

100% tests passed, 0 tests failed out of 25

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/cli11/Makefile,v
diff -u -p -r1.3 Makefile
--- Makefile	10 Mar 2025 09:03:38 -0000	1.3
+++ Makefile	21 Oct 2025 08:31:10 -0000
@@ -4,7 +4,7 @@ PKGNAME =		${DISTNAME:L}
 
 GH_ACCOUNT =		CLIUtils
 GH_PROJECT =		CLI11
-GH_TAGNAME =		v2.5.0
+GH_TAGNAME =		v2.6.0
 
 CATEGORIES =		devel
 HOMEPAGE =		https://cliutils.github.io/CLI11/book/
Index: distinfo
===================================================================
RCS file: /cvs/ports/devel/cli11/distinfo,v
diff -u -p -r1.2 distinfo
--- distinfo	10 Mar 2025 09:03:38 -0000	1.2
+++ distinfo	21 Oct 2025 08:31:10 -0000
@@ -1,2 +1,2 @@
-SHA256 (CLI11-2.5.0.tar.gz) = F+ArTN3C+jSOXb27WCxZo0hvorJDPnCgw7rLhxM0/VU=
-SIZE (CLI11-2.5.0.tar.gz) = 361527
+SHA256 (CLI11-2.6.0.tar.gz) = jBG8BJCQpmy3HD6QNQzdqnkrKkXgp4QXmZALlco4sQE=
+SIZE (CLI11-2.6.0.tar.gz) = 390618
Index: pkg/PLIST
===================================================================
RCS file: /cvs/ports/devel/cli11/pkg/PLIST,v
diff -u -p -r1.2 PLIST
--- pkg/PLIST	10 Mar 2025 09:03:39 -0000	1.2
+++ pkg/PLIST	21 Oct 2025 08:31:10 -0000
@@ -6,6 +6,7 @@ include/CLI/Config.hpp
 include/CLI/ConfigFwd.hpp
 include/CLI/Encoding.hpp
 include/CLI/Error.hpp
+include/CLI/ExtraValidators.hpp
 include/CLI/Formatter.hpp
 include/CLI/FormatterFwd.hpp
 include/CLI/Macros.hpp
@@ -21,6 +22,7 @@ include/CLI/impl/App_inl.hpp
 include/CLI/impl/Argv_inl.hpp
 include/CLI/impl/Config_inl.hpp
 include/CLI/impl/Encoding_inl.hpp
+include/CLI/impl/ExtraValidators_inl.hpp
 include/CLI/impl/Formatter_inl.hpp
 include/CLI/impl/Option_inl.hpp
 include/CLI/impl/Split_inl.hpp