implement six-skill gstack 2 runtime

careful/SKILL.md

@@ -1,5 +1,5 @@
 ---
-name: careful
+name: gstack-1-careful
 version: 0.1.0
 description: Safety guardrails for destructive commands. (gstack)
 triggers:
@@ -16,6 +16,8 @@ hooks:
         - type: command
           command: "bash $HOME/.claude/skills/gstack/careful/bin/check-careful.sh"
           statusMessage: "Checking for destructive commands..."
+metadata:
+  internal: true
 ---
 <!-- AUTO-GENERATED from SKILL.md.tmpl — do not edit directly -->
 <!-- Regenerate: bun run gen:skill-docs -->