diff --git a/CLAUDE.md b/CLAUDE.md
index 2e970df..d280520 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -6,6 +6,10 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 **Tia** is a baby tracking app built with Next.js 15/16, designed for a Mama to track her baby's feeds, sleep, diapers, vaccinations, growth, and memories. The app features offline-first logging, AI-powered Q&A, and a Telegram alert system.
 
+## Build Verification Rule
+
+**ALWAYS verify the build passes locally BEFORE asking user to deploy.** Run `pnpm build` (or `npm run build`) and confirm it succeeds with no errors. Do not ask the user to trigger a deployment until you've confirmed the build works.
+
 ## Common Commands
 
 ```bash