How do I set environment variables on Windows?

Answer

GUI method: Search 'Environment Variables' > Edit system environment variables > Environment Variables button > User variables > New > Name: VIBGRATE_DSN, Value: your-dsn. Command line (current session): set VIBGRATE_DSN=your-dsn (cmd) or $env:VIBGRATE_DSN="your-dsn" (PowerShell). Persistent via PowerShell: [Environment]::SetEnvironmentVariable('VIBGRATE_DSN', 'your-dsn', 'User'). Restart terminals after changes.