IT Services Circle

Apr 7, 2026 · Artificial Intelligence

Inside Claude Code: How Anthropic’s Programming Agent Handles Architecture, Memory, and Context

This article provides a detailed technical walkthrough of Claude Code, Anthropic’s AI programming agent, covering its core architecture, the four‑layer engine design, the shift from ReAct to a streamlined Tool‑Use Loop, sophisticated system prompts, a structured memory subsystem, and a five‑step context compression strategy that keeps the model within token limits while preserving essential information.