merge: wave 2 executor (01-02) into main

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -41,6 +41,8 @@ oldreference/
 *.md
 !/README.md
 !/docs/*.md
+!/CLAUDE.md
+!/.planning/**/*.md
 *.zip
 *.blockmap
 *.exe