Learn · Expert Guides
Four pillars, one stack. Patterns are the portable techniques. The Toolkit is the Claude Code features. Harness Engineering is the runtime floor the other two stand on. Security is the trust surface that cuts across all three.
The four pillars
New to all this?
Start Here — agentic engineering in plain English
Saw a demo and want to understand the words? A no-code on-ramp that decodes the jargon and the mental models, then points you back at the pillars.
How It Connects
The four pillars are one system, not four silos.
Patterns ↔ Toolkit
Each portable pattern has a Claude Code feature that implements it.
Harness · The Floor Beneath
Harness Engineering is the runtime layer the patterns and toolkit stand on — each chapter is an idea above it, seen at the loop level.
Security · Cuts Across
Security is not a fourth silo — each chapter hardens an idea the other pillars already established.