Adding Features to Your Augment Code App

Augment excels at code-level tasks within an existing codebase but doesn't handle infrastructure changes, database schema migrations, or cross-system integrations well. It works best for feature work within defined boundaries and less well for architectural changes that require understanding the full system

Adding new API endpoints consistent with existing patterns. Implementing new business logic in existing service classes. Writing tests for existing untested code. Refactoring specific modules to improve structure. Adding logging and observability to existing code paths

Almost every SaaS app needs payment processing. Stripe is the standard — it handles credit cards, subscriptions, invoices, and payouts. The key pieces: a checkout flow for collecting payment, webhooks to update your database when payments succeed or fail, and a customer portal for managing subscriptions. Augment Code might generate a basic checkout page, but the webhook handling and subscription lifecycle management usually need to be built by hand.

Your app needs user accounts with secure login. The easiest options: NextAuth (for Next.js), Supabase Auth, or Clerk. These handle email/password login, social login (Google, GitHub), password resets, and session management. Don't build auth from scratch — the security implications are too complex for a first implementation.

Transactional emails — welcome emails, password resets, order confirmations — require an email service provider. Resend is the simplest to set up, SendGrid is the most established, and Amazon SES is the cheapest at scale. You'll need email templates, a sending service, and proper DNS configuration (SPF, DKIM) so your emails don't land in spam.

If a feature requires deep technical expertise (payment compliance, data privacy, real-time systems), it's faster and safer to get professional help than to iterate with AI tools. Our team adds features like these to Augment Code apps every week — we know the patterns and the pitfalls.