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Simon Willison launches Agentic Engineering Patterns project to document coding-agent practices
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Simon Willison began a project to gather and share coding-agent practices that help engineers use tools like Claude Code and OpenAI Codex effectively.
The project captures how near-zero-cost code generation shifts traditional engineering intuition and workflow. It shows how test-first development can guide agents to produce reliable code with minimal prompting. Engineers can adopt these patterns to accelerate work while retaining control over quality.
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Simon Willison launched Agentic Engineering Patterns to document coding-agent practices for tools that generate and execute code independently.
The first two chapters cover “Writing code is cheap now” and “Red/green TDD”, explaining low-cost generation and test-first guidance for agents.
He plans to add 1-2 chapters weekly using a guide format, with the implementation largely written by Claude Opus 4.6 running in Claude Code on his iPhone.
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