feat(opcodes): register full AGE opcode ABI

engine/Age.Engine.Tests/OpcodeTableTests.cs

@@ -1,19 +1,37 @@
+using Age.Engine.Model;
 using Age.Engine.Sys4;
 using Xunit;
 
 public class OpcodeTableTests
 {
     [Fact]
-    public void LoadsObservedOpcodesPlusMappedUnusedAbiEntries()
+    public void LoadsCompleteAgeCatalog()
     {
         var t = OpcodeTableJson.Load(Paths.OpcodesJson);
-        Assert.Equal(249, t.Count); // 248 corpus-observed + unused persistence ABI opcode 0x19f
+        Assert.Equal(548, t.Count); // 248 Himegari-observed + 300 broader AGE compatibility stubs
         Assert.True(t.TryGet(0x55, out var label, out var argc));
         Assert.Equal("mov", label);
         Assert.Equal(2, argc);
         Assert.Equal("u0041BEB0", t.Label(0x90));
         Assert.Equal(7, t.Argc(0x90));
         Assert.Equal(2, t.Argc(0x19f));
+        Assert.Equal(2, t.Argc(0x1be)); // Kamidori probe blocker; catalog-only in Himegari
         Assert.Equal(-1, t.Argc(0x9999)); // absent -> -1
     }
+
+    [Fact]
+    public void CatalogOnlyOpcodeDoesNotTruncateFollowingInstructions()
+    {
+        var t = OpcodeTableJson.Load(Paths.OpcodesJson);
+        var script = ScriptAssembler.Assemble(t, "CROSS_GAME_STUB", new List<(int, Operand[])>
+        {
+            (0x1be, new[] { new Operand(0, 11), new Operand(0, 22) }),
+            (0x2, Array.Empty<Operand>()),
+        }, Array.Empty<string>());
+
+        Assert.Equal(2, script.Instructions.Count);
+        Assert.Equal(0x1be, script.Instructions[0].Opcode);
+        Assert.Equal(2, script.Instructions[0].Args.Count);
+        Assert.Equal(0x2, script.Instructions[1].Opcode);
+    }
 }