Part II: The Unit

The augmented LLM up close: a single model with tools, a machine-checkable contract, the standard ways to package and connect it, the loop that runs it, and the harness your code owns around it.

In this part

• 2.1 Tool Use
• 2.2 Structured Output
• 2.3 Skills
• 2.4 MCP
• 2.5 The Agent Loop (planned)
• 2.6 The Harness (planned)