Fable nailed my production YOLO infra migration

One orchestrator prompt, six platform swaps, and a real production cutover on kentcdodds.com — the workflow, the review loop, the perf scare, and where the agents were wrong. 00:00 - One prompt, 40,000 lines 00:44 - The site and why migrate 06:38 - PR #813 — 483 files 07:09 - Kickoff prompt anatomy 11:35 - Orchestrate with subagents 16:13 - Steering + scope expansion 21:33 - Three-layer review 23:22 - Kody closes the loop 25:24 - The performance scare 30:22 - Merge and cutover 33:51 - Cleanup waves 37:44 - Was 40k lines worth it? 39:40 - Homework: try orchestration Kent walks through how AI agents moved kentcdodds.com from fly.io to Cloudflare Workers — database, ORM, images, email, MDX pipeline, and more — from a single orchestrator prompt plus steering, subagent swarms, three-layer review, and Kody closing every loop. Includes the performance scare that almost killed the migration, the post-cutover cleanup waves, and an honest rollup of four agent-driven PRs (about 40,000 lines changed). Links PR #813 — migration ( https://github.com/kentcdodds/kentcdo... ) Slides deck ( https://kcd-slides-bwk-one-prompt-mig... ) kentcdodds.com ( https://kentcdodds.com ) Better with Kent Episode 11 July 21, 2026 ★ Episode details: https://share.transistor.fm/s/90349326 ★ Additional episodes: https://kentcdodds.com/better