Merge branch '2.19' into 2.20

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -21,6 +21,7 @@ No changes since 2.20.0
 
 No changes since 2.18
 
+2.18.10 (15-Aug-2026)
 2.18.9 (07-Jul-2026)
 2.18.8 (28-May-2026)
 2.18.7 (24-Apr-2026)