Safely Refactor Production Codebases with AI

Breaking API migrations, hidden coupling, and large-scale rewrites — done safely with AST-backed AI workflows.

AI can refactor your code in seconds, but it can also introduce subtle breakages just as quickly.

In this focused 90-minute workshop, you’ll learn how to combine AI-assisted reasoning with AST-based structural guarantees to refactor code safely and confidently.

This session shows you how to integrate ast-grep + Claude Code to reduce regression risk — even across large or evolving codebases.

Who This Is For

• Developers who refactor real-world code (in any language)
• Engineers using AI tools and wanting safer workflows
• Tech leads evaluating guardrails for AI-assisted changes
• Anyone maintaining a codebase where breakages are costly

Whether you're working in a startup environment or a large production system, the techniques are immediately applicable.

What You'll Take Away

ast-grep creator Herrington Darkholme will teach you:

• The basics of ast-grep, which supports 20+ languages (C, C#, JavaScript, TypeScript, Python, Rust, Go, and so on) and is used by the likes of Speedy Web Compiler, Shopify’s Hydrogen, and Modern.js

• How ast-grep helps developers safely refactor codebases and put in place code guardrails

• How to use ast-grep in production-grade AI-assisted workflows

If you regularly encounter the frustration of searching through your codebases — whether with grep, an IDE's search function, or manual inspection — this workshop is for you. Reduce your fear of refactoring, enforce code best practices tailored to business needs, and adopt breaking changes in dependencies.

Each Ticket Includes

• Instant access to the full 300+ page Mastering ast-grep ebook, written by ast-grep’s creator Herrington
• Herrington’s Claude Code prompt templates

Meet the Instructor

This session is delivered by Herrington Darkholme (GitHub, X, Medium), creator of ast-grep and an ex-ByteDance developer proficient in Rust and TypeScript.

Herrington’s primary technical focus is on rewriting and accelerating the web frontend toolchain with Rust, and he is actively involved in several well-known open-source projects, including Vue.js.