implement six-skill gstack 2 runtime

setup-gbrain/SKILL.md

@@ -1,5 +1,5 @@
 ---
-name: setup-gbrain
+name: gstack-1-setup-gbrain
 preamble-tier: 2
 version: 1.0.0
 description: "Set up gbrain for this coding agent: install the CLI, initialize a local PGLite or Supabase brain, register MCP, capture per-remote trust policy. (gstack)"
@@ -17,6 +17,8 @@ allowed-tools:
   - Glob
   - Grep
   - AskUserQuestion
+metadata:
+  internal: true
 ---
 <!-- AUTO-GENERATED from SKILL.md.tmpl — do not edit directly -->
 <!-- Regenerate: bun run gen:skill-docs -->