Asset compiler first iteration:

SlaveEngine.AssetBuilder/Program.cs

@@ -0,0 +1,32 @@
+using System.CommandLine;
+using Spectre.Console;
+
+namespace SlaveEngine.AssetBuilder;
+
+class Program {
+    static int Main(string[] args) {
+        var inputOption = new Option<DirectoryInfo>("--input", "Path to the input SlaveMatrix/Assets folder");
+        inputOption.SetDefaultValueFactory(() => new DirectoryInfo("./SlaveMatrix/Assets"));
+
+        var outputOption = new Option<DirectoryInfo>("--output", "Path to the output directory for compiled .spart files");
+        outputOption.SetDefaultValueFactory(() => new DirectoryInfo("./Assets"));
+
+        var rootCommand = new RootCommand(
+            "SlaveEngine Asset Builder — compiles YAML + SVG assets into .spart binaries");
+        rootCommand.AddOption(inputOption);
+        rootCommand.AddOption(outputOption);
+
+        rootCommand.SetHandler((DirectoryInfo input, DirectoryInfo output) => {
+            if (!input.Exists) {
+                AnsiConsole.MarkupLine("[red]Error:[/] input directory not found: {0}", input.FullName);
+                Environment.Exit(1);
+            }
+
+            var compiler = new Compiler(input.FullName, output.FullName);
+            var result = compiler.Run();
+            Environment.Exit(result);
+        }, inputOption, outputOption);
+
+        return rootCommand.Invoke(args);
+    }
+}