build-scaffoldlisted

# Build Scaffold When starting a new project: 1. Create clean directory structure 2. Initialize with the chosen technology 3. Set up basic configuration 4. Verify it runs with a "hello world" or equivalent 5. Tell user: "框架搭好了，我来开始做功能。" Rules: - Keep structure flat and simple. No over-engineering. - Every file has a clear purpose. No boilerplate for the sake of boilerplate. - If using Go: single main.go to start, split files only when needed - If using Node: minimal package.json, no unnecessary dependencies