Gitignore docs-private/ for private working notes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dadachi

.gitignore

@@ -63,3 +63,6 @@
 .claude/logs/
 .claude/tmp/
 .claude/*.log
+
+# Private docs — not for publication
+/docs-private/