Always verify configuration values against official documentation and test across target platforms before committing. Invalid configuration values can cause build failures, runtime errors, or platform-specific issues that are difficult to debug. Key validation practices: - Check configuration values against official documentation (e.g., TypeScript lib options, VS Code settings) - Test configurations on all target platforms, especially when using environment variables - Avoid assumptions about default keybindings or environment-specific values - Use platform-agnostic paths and values when possible Example of problematic configuration: ```json // tsconfig.json - Invalid lib value { "compilerOptions": { "lib": ["es2022", "esnext.disposable", "DOM"] // ❌ "esnext.disposable" is not valid } } // Fixed version { "compilerOptions": { "lib": ["es2022", "DOM"] // ✅ Valid lib values only } } ``` This prevents configuration-related build failures and ensures consistent behavior across development environments.