Class 02 — Claude Code

The Exchange

Stateless HTTP all the way down — step through exactly what JSON travels over the wire during a tool-using conversation.

Key concept

Claude has no memory. Every API call is independent. You send the model, system prompt, tool definitions, and the entire messages[] history on every single request. The history grows; the server forgets.

§ Step-through

A Tool-Using Conversation

A user asks Claude to fix a bug. Claude reads a file, applies an edit, and replies. Seven stages — every HTTP boundary shown.

messages[] empty

What happened?

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