// vtrnstudio.com
AI Features That
Actually Ship
A senior engineer's guide to adding real LLM features to production web apps — without blowing up your token budget or shipping demos no one uses.
Instant PDF download · No subscription · 38 pages
// vtrnstudio.com
25 Years
Software Engineering Experience
5 Patterns
From real production AI apps
38 Pages
No fluff, no theory, just code
// The 5 Patterns
01
AI Draft Generation
Never send raw prompts from the frontend.
POST /api/ai/generate → rate limit → prompt template → max_tokens
02
AI Assist, Not Replace
Design principle: AI should accelerate decisions, not replace them.
Bad vs Good pattern table
03
Cost Control Architecture
Token costs are invisible until they aren't.
max_tokens enforcement + model tier example
04
Latency Strategy
Slow AI kills adoption.
streaming response snippet
05
AI Features That Monetize
Every AI call should map to measurable revenue.
token deduction function
What's Inside
A focused playbook: intro, five production patterns, closing action items, and a pre-launch checklist.
- Intro — Why Most AI Features Fail
- Intro — The Rule Most AI Features Break (+ server-side always)
- Pattern 1 — AI Draft Generation(architecture, voice matching)
- Pattern 2 — AI Assist, Not Replace(UX loop, confidence signal)
- Pattern 3 — Cost Control Architecture(5 safeguards, model tiering)
- Pattern 4 — Latency Strategy(streaming, background jobs, loading copy)
- Pattern 5 — AI Features That Monetize(PAYG, usage-based, what converts)
- Closing — What To Do Right Now
- Bonus — Pre-Launch Checklist(architecture + UX + business)
Miguel Feliciano
Founder, VTRN Studio · 25-Year Software Engineer
Built and shipped multiple AI-powered SaaS products. Currently building ArticleToPost.com — a PAYG social content tool with voice matching. This guide is the engineering playbook from those builds.
Stop building demos. Start shipping AI features.
38 pages. 5 production patterns. Instant download.
Instant PDF download · No subscription · Secure checkout via Stripe
FAQ
Is this beginner friendly?
Best for intermediate-to-senior developers. You should be comfortable with REST APIs and basic async JavaScript. The patterns are framework-agnostic but examples use Next.js.
Is the code framework-specific?
Code examples use Next.js App Router, but every pattern applies to any Node.js backend. The concepts translate directly to Express, Fastify, or any other framework.
What if it's not what I expected?
Email hello@vtrnstudio.com within 7 days and I'll refund you, no questions. If a 25-year engineer can't help you ship an AI feature, you shouldn't pay for it.