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# Beyond Vibe Coding: An AI Builder’s Guide to Migrating 10k+ React Components


- **Event:** World Congress 2026 North America

## Description

Ads Manager powers 84% of Meta's Ads Revenue, but its decade-old codebase was stuck on React class components — blocking modern patterns like hooks, Relay, and React Compiler. Manual migration of 10k+ components class to functional component was impractical. In this talk, I'll show how we built an AI codemod pipeline using LLMs that achieved a 5x speedup, migrating 3k+ components with a 99.6% success rate. I'll cover the tradeoffs between AST and AI codemods, how to classify components by complexity for targeted prompts, and the grading/eval strategies that made non-deterministic AI agents production-ready.

## Speaker

### [Shubham Chaurasia](https://www.wearedevelopers.com/@shubham-chaurasia)

Senior Software Engineer @ Meta


## Related talks at this congress

- [Beyond Vibe Coding: Using CLI Tools as Your AI Counterpart in Pair Programming](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1721-beyond-vibe-coding) — Ron Veen
- [The spectrum of agentic coding: From vibe coding to high-quality software engineering](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1437-the-spectrum-of) — YK Sugi
- [Vibe Coding Accessibility](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1438-vibe-coding) — Karl Groves
- [When Humans Stop Writing Code: Rethinking Languages, Compilers, and Responsibility](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1709-when-humans-stop) — Simon Auer

## Watch remotely

Can’t make it to San José? Watch this session live with Pro. You also get:

- All full videos, bookmarks, and playlists
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[See pricing](https://www.wearedevelopers.com/pricing)

## Links

- [Get tickets](https://www.wearedevelopers.com/world-congress-north-america/tickets)