Start Here
Start Here
A practical path from AI demos to production-ready systems.
AI Tool Stack is a curriculum and library for builders who want more than demos: start with the foundation beliefs, use System Layer essays to understand the production architecture, then study projects that apply the patterns in real workflows.
How to use this site
Read the Foundations
Build your base with essential concepts, patterns, and mental models for AI engineering.
Study a Project
Dive into complete systems with architecture, code, decisions, and lessons.
Apply System Layers
Use evidence, evaluation, review, reliability, and cost patterns before production pressure arrives.
Your learning path
Foundations
Core concepts, system thinking, prompting, data, evaluation.
System Layers
Ingestion, orchestration, evidence, evaluation, runtime, and efficiency.
Project Systems
End-to-end walkthroughs of real AI systems.
Production Reality
Validation, monitoring, deployment, cost, security, and operations.
Recommended first project
PolicyTrace
A Document AI system for multi-PDF UK insurance packs: golden record extraction with validation, arbitration, PII masking, and a human-in-the-loop review UI.
Handles complex, multi-document insurance packs.
Validation, conflict detection, PII masking, and audit trail.
FastAPI backend, React UI, and review workflow.
Curated reading
Ready to dive in?
Pick a path and start building systems that matter.