Sebastian Raschka Deep-Dive: The Six Building Blocks of a Coding Agent

Sebastian Raschka·medium signal

Sebastian Raschka published a detailed breakdown on April 4 of how coding agents work in practice, identifying six core building blocks: model selection, repo context management, tool design, prompt-cache stability, memory, and long-session continuity. He released a companion minimal Python harness (rasbt/mini-coding-agent) and argues that in real-world applications, the surrounding system plays as much of a role as the model itself. 205 HN points and 67 comments.