diff --git a/CLAUDE.md b/CLAUDE.md
index 857d5b9..c359fd2 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -7,6 +7,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 - **No backward compatibility**: This is a new project. Do not add any backward-compatible code, deprecated APIs, migration shims, or legacy support. Remove old code entirely when refactoring instead of keeping it around "just in case".
 - **Git commits**: When asked to commit, only create the commit (no push). Commit messages must not contain any Claude-related information (no "Co-Authored-By", no "Generated with Claude", etc.).
 - **Documentation**: All documentation must be stored under `docs/`. When implementing features based on design documents, update the corresponding document after coding is complete to reflect the current implementation status.
+- **Selective builds**: Do not run `pnpm build` to build all packages. Only build the packages you need. Use `pnpm --filter <package> build` for selective building. The desktop (Tauri) build is especially slow, so avoid building it unless specifically working on desktop features.
 
 ## Project Overview