docs(boilerplate): update SKILL.md for per-DB architecture

- Update directory structure (remove (authenticated) group)
- Add /getting-started page description
- Add detailed SDK import rules table
- Highlight: invite mutations are in @sdk/admin
- Update example code with real mutation format

Author: theothersideofgod

skills/constructive-boilerplate-nextjs-app/SKILL.md

@@ -152,9 +152,8 @@ Required backend services:
 src/
 ├── app/                        # Next.js App Router pages
 │   ├── layout.tsx              # Root layout with providers
-│   ├── page.tsx                # Home page (Start Building Here)
-│   ├── (authenticated)/        # Protected pages
-│   │   └── organizations/      # Organizations list
+│   ├── page.tsx                # Home (login → build guide, edit this!)
+│   ├── organizations/          # Organizations list
 │   ├── login/                  # Login page
 │   ├── register/               # Registration page
 │   ├── forgot-password/        # Password reset request
@@ -234,60 +233,72 @@ import { useCurrentUserQuery, useSignInMutation } from '@sdk/auth';
 import { useOrgMembershipsQuery, useAppMembershipsQuery } from '@sdk/admin';
 ```
 
-### SDK Structure
+### SDK Import Rules
 
-| SDK | Import | Use For |
-|-----|--------|---------|
-| `@sdk/admin` | `import { ... } from '@sdk/admin'` | Organizations, members, permissions, invites |
-| `@sdk/auth` | `import { ... } from '@sdk/auth'` | Users, emails, signIn, signUp, currentUser |
-| `@sdk/app` | `import { ... } from '@sdk/app'` | Your business tables |
+| API | Import From | Reason |
+|-----|-------------|--------|
+| `useCurrentUserQuery` | `@sdk/auth` | User data in auth endpoint |
+| `useSignInMutation`, `useSignOutMutation` | `@sdk/auth` | Auth mutations |
+| `useSetPasswordMutation`, `useResetPasswordMutation` | `@sdk/auth` | Password in auth |
+| `useCreateUserMutation`, `useDeleteUserMutation` | `@sdk/auth` | User CRUD |
+| `useOrganizationsQuery`, `useOrgMembershipsQuery` | `@sdk/admin` | Org data in admin |
+| `useAppPermissionsQuery`, `useOrgPermissionsQuery` | `@sdk/admin` | Permissions in admin |
+| `useSubmitInviteCodeMutation`, `useSubmitOrgInviteCodeMutation` | `@sdk/admin` | **Invite mutations in admin, NOT auth** |
+| `useBoardsQuery`, `useCreateBoardMutation` | `@sdk/app` | Your business tables |
+
+**Key rule**: Invite mutations (`useSubmitInviteCodeMutation`, `useSubmitOrgInviteCodeMutation`) are in `@sdk/admin`, not `@sdk/auth`.
 
 ## Building Your App
 
-After login, the home page (`src/app/page.tsx`) shows a guide. To add your business logic:
+After login, you'll see the build guide on the home page. To add your business logic:
 
 ### 1. Edit the Home Page
 
-Replace the guide content in `src/app/page.tsx` with your main feature:
+Replace the build guide in `src/app/page.tsx` with your main feature:
 
 ```typescript
 'use client';
 
-import { useYourTableQuery, useCreateYourTableMutation } from '@sdk/app';
+import { useBoardsQuery, useCreateBoardMutation } from '@sdk/app';
 
 export default function HomePage() {
-  const { data, isLoading } = useYourTableQuery({});
-  const createMutation = useCreateYourTableMutation();
+  const { data, isLoading } = useBoardsQuery({
+    selection: { fields: { id: true, name: true, description: true } },
+  });
+  const createMutation = useCreateBoardMutation();
 
   if (isLoading) return <div>Loading...</div>;
 
   return (
     <div className="p-8">
-      <h1 className="text-2xl font-bold mb-4">Your Feature</h1>
+      <h1 className="text-2xl font-bold mb-4">Boards</h1>
 
       <ul className="space-y-2">
-        {data?.yourTable?.nodes?.map((item) => (
-          <li key={item.id}>{item.name}</li>
+        {data?.boards?.nodes?.map((board) => (
+          <li key={board.id}>{board.name}</li>
         ))}
       </ul>
 
       <button 
-        onClick={() => createMutation.mutate({ input: { name: 'New Item' } })}
+        onClick={() => createMutation.mutate({ 
+          input: { object: { name: 'New Board' } } 
+        })}
         className="mt-4 px-4 py-2 bg-primary text-white rounded"
       >
-        Create New
+        Create Board
       </button>
     </div>
   );
 }
 ```
 
-### 2. Add New Pages
+### 2. Add More Pages
 
-Create pages in `src/app/(authenticated)/`:
+Create additional pages in `src/app/`:
 
 ```
-src/app/(authenticated)/your-feature/page.tsx
+src/app/boards/[boardId]/page.tsx
+src/app/settings/page.tsx
 ```
 
 ### 3. Update Sidebar