Simon Willison launches Agentic Engineering Patterns to document best practices for coding agents

Software Engineering in the Agentic Era

Simon Willison started a project to document coding patterns for agentic tools like Claude Code and OpenAI Codex. He draws a line between vibe coding—ignoring the code entirely—and agentic engineering, where professional devs use agents to amplify their expertise. The first two chapters cover how near-zero code generation cost reshapes team intuition, and how test-driven development helps agents produce tighter, more reliable code. The content lives as a 'guide' with chapters designed to be updated over time. Willison says all prose is his own; LLMs only assist with proofreading and code examples. The post doesn't specify a timeline for future chapters.

Why it matters: Simon Willison launches a structured guide to agentic engineering patterns, drawing a clear line from vibe coding. Directly useful for devs using Claude Code. Score capped here because it's a project launch with concepts defined but patterns not yet fleshed out—worth revisitin...