Build Production-Grade
Web Projects With AI.
No demo projects. Real code.
The development playbook for SEO professionals, creatives, founders, and developers who want to ship production-grade work with AI. From a CTO who built platforms serving 100M+ pageviews, sold his agency, then spent 2,500 hours turning AI into a serious development system.
One-time payment · PDF + Markdown · free updates forever
The AI Development Playbook
- The Four Building Blocks — source documents that turn AI into a production-grade development partner
- The two-tool workflow — plan in ChatGPT/Claude, build in VS Code with Codex or Claude Code
- The /docs folder architecture that gives AI the context to write real code
- The micro-applications model — build complex projects as small, focused modules
- 6 production rules for AI-assisted development that prevent expensive mistakes
- How to manage coding agents — parallel execution, PRD specs, test-driven builds
- Content pipelines, SEO systems, and WCAG compliance built into the workflow
- Complete project workflow from idea to shipped, production-ready code
- 14-day quick-start plan to go from zero to building
- Every template — PRDs, dev standards, project specs — ready to copy
€ 29
One-time purchase · free lifetime updates
If within one afternoon you don't get real, usable value from it — you get your money back. No questions.
Built on real production work,
not AI demos
100M+
Pageviews per year across platforms built over 15 years. Production code, real users, real scale. Agency sold in 2022.
2,500+ hours
Hands-on building with AI after the exit. Not prompting — writing production systems, shipping code, deploying.
40–60%
Faster delivery on well-structured projects. The same work, in half the time. Without cutting corners on quality.
€25K → days
WCAG compliance work that used to require a full dev team and €25,000 — now built correctly from the first line of code.
What's Inside
17 chapters. A complete development system — from project architecture to deployed code.
Why Most People Use AI Wrong for Development
The stranger problem — why AI forgets everything between sessions. Tool sprawl. Demo culture vs. production reality. And the core principle: the system matters more than the model.
The Operating System & Four Building Blocks
The four documents every project needs before you write a single line of code — SEO strategy, client playbook, dev & quality standards (incl. WCAG), and PRDs. The /docs folder architecture. The two-tool workflow: plan in ChatGPT/Claude, build in VS Code with Codex or Claude Code.
Context, Identity & Memory
How to give your AI the persistent context it needs to write code that matches your standards. The three-layer memory model that makes AI output get better project after project.
The Micro-Applications Model
Never build monoliths with AI. Build small, focused modules instead — each one testable, deployable, reusable. Real-world example: how Agency Inside is split into two separate apps (a Producer and a Public frontend) each optimized for its role.
6 Rules for Production-Grade AI Development
Control the loop. Context is expensive. Small tasks win. Separate every pipeline step. Test-driven AI work. And the one filter question that prevents most wasted effort and budget.
Project Workflow & Content Pipelines
The complete workflow from project setup to deployed code. How to structure AI-assisted content production in separate, debuggable stages — not one giant prompt.
Managing Coding Agents at Scale
Why long AI coding sessions degrade after 30 minutes. The short-sprint fix. Writing PRD specs that coding agents can execute. The two-model split. Running parallel agents on different feature branches.
Safety, Quality Gates & Cost Control
The trust ladder for AI access. Client data isolation. How to pick the right model for each task — and stop burning money on expensive models for cheap work.
New Services You Can Build & Sell
Four new service categories this system enables. How to price on value delivered — not hours spent. Turning your AI development capability into a revenue stream.
Mistakes, Quick-Start & All Templates
Honest mistakes we made so you don't repeat them. A 14-day plan from zero to building production code. Every template — PRDs, dev standards, module specs, project structure — ready to copy into your first project.
Built for people who ship
Whether you write code daily or have never opened a terminal — if you work in digital and want to build production-grade projects with AI, this system works for you.
This is for you if:
- ✓ You're a developer who wants to 2–3x your output with AI-assisted workflows
- ✓ You're an SEO pro who wants to build technical implementations yourself
- ✓ You're a creative or designer who wants to ship, not just hand off designs
- ✓ You're a founder who wants to build your own MVPs and tools
- ✓ You buy from agencies and want to understand how modern builds actually work
This is not for you if:
- ✗ You're looking for a prompt pack or AI hacks
- ✗ You want no-code drag-and-drop magic
- ✗ You've never touched a website, CMS, or any digital tool
- ✗ You want theory and trends, not a working system
- ✗ You expect AI to replace thinking and judgment
About the Author
Builder first. Then agency founder. Then CTO.
Now teaching the system.
Sebastiaan van der Lans has been building on the web since the early open internet. In 2006 he founded Van Ons — Amsterdam's first WordPress agency — and over 15+ years built it into a leading digital firm delivering platforms with 100M+ pageviews annually. €10M+ in lifetime revenue across his ventures. He sold the company in 2022.
He founded WordProof, a digital trust startup that won the European Commission's "Blockchains for Social Good" award and secured €2M+ in public innovation grants. He currently serves as CTO at Pride Amsterdam, building the digital infrastructure for WorldPride 2026 — a global event welcoming millions of visitors.
After the exit, he spent 2,500+ hours going deep on AI-assisted development. Not prompting — building. Writing production systems, managing coding agents, deploying real projects. That work became this guide.
This is a living document
Updated regularly as new workflows, tools, and techniques emerge from real production work. Buy once — every future version is yours, free.
Agency Inside — the platform built with this system, live now
2700
Published cases
120
Agencies
€ 0
AI API credits
€ 20/mo
Total AI cost
Stop briefing.
Start building.
The development system that lets you go from idea to production-grade code — with AI doing the heavy lifting and your judgment steering.
One-time · PDF + Markdown · free updates forever
Build Production-Grade Web Projects With AI — 58 pages, € 29
The exact system behind Agency Inside. Free updates forever.