name: feature-builder description: | Add features by description. User says WHAT, AI figures out HOW. Use when: user wants to add functionality to existing app. Triggers: "add auth", "add payments", "add search", "добавь", "integrate", "connect".

Feature Builder

Add complete features from simple descriptions.

Feature Patterns

Authentication

"Add login" / "Add auth" / "Users should sign in"

Generates:

• Login/register pages
• Auth context/hooks
• Protected routes
• Session management

Payments

"Add payments" / "Accept money" / "Stripe"

Generates:

• Pricing page
• Checkout flow
• Stripe integration
• Webhook handlers

Search

"Add search" / "Find things"

Generates:

• Search input component
• Search API endpoint
• Results display
• Filters (if applicable)

CRUD

"Manage [items]" / "Add/edit/delete [things]"

Generates:

• List view
• Create/edit forms
• Delete confirmation
• API endpoints

Process

1. Parse request

   • Identify feature type
   • Extract specifics (e.g., "Google auth")

2. Plan implementation

   • Required components
   • API endpoints
   • Database changes

3. Generate with TDD

   • Write tests first
   • Implement each part
   • Verify all tests pass

4. Integrate

   • Add to existing routes
   • Update navigation
   • Connect to data layer

5. Report

   • "✅ Added [feature]"
   • Show preview

User Experience

User: "Add Google login" ↓ "Adding Google authentication..." ↓ [Generate OAuth flow, buttons, callbacks] ↓ "✅ Google login added. Try it in preview."