Kun is an ex-L8 principal engineer at Meta and Microsoft who now ships 40 PRs a day without manually reviewing code. In our episode, he walked through the free tools he built to make that possible: Lavish for visual planning in HTML artifacts, Treehouse for parallel agents, and No Mistakes for catching AI coding errors before they make it to production. Kun and I talked about: (00:00) Why he doesn't review code anymore (01:04) Agentic engineering: Plan, code, validate (06:22) Demo: Fixing an AI tutor screen with agents (08:40) Demo: Why HTML is better than markdown for planning (19:53) How to turn a rough idea into an AI-ready spec (23:21) How Kun runs 20-30 agents in parallel (32:04) No Mistakes: Kun's free AI code review tool (45:19) What Kun checks before merging AI-written code (50:18) How to get better at agentic engineering Thanks to our sponsors: Linear: The AI agent platform for modern teams https://linear.app/behind-the-craft Wispr Flow: 4x faster than typing with your voice https://ref.wisprflow.ai/peteryang Riverside: All-in-one AI studio for podcasts and video https://creators.riverside.com/PeterYang 📌 Get the takeaways: https://creatoreconomy.so/p/how-this-ex-meta-l8-engineer-ships-40-prs-a-day-with-ai-kun-chen 📌 Get my personal AI operating system with all my skills and prompts: https://www.behindthecraft.com/ Where to find Kun: GitHub: https://github.com/kunchenguid X: https://x.com/kunchenguid Kun's free tools from the episode: Lavish (HTML editor): https://github.com/kunchenguid/lavish-axi Treehouse: https://github.com/kunchenguid/treehouse No Mistakes (AI code review): https://github.com/kunchenguid/no-mistakes Subscribe to this channel - more interviews coming soon!