Maps are editor-built scenes: [Tool] Playground/Crag, headless rebuild for agents

scenes/maps/playground.tscn and crag.tscn are generated by the map scripts' Rebuild (inspector
button, or godot-mono --headless --path . tools/rebuild_maps.tscn) and loaded as saved by the game,
so hand edits stick. The crag route is saved as Marker3D nodes and crag_spike checks the saved
scene. Layout verified identical to the code-built one (tools/map_dump.tscn).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/MapDump.cs

@@ -0,0 +1,62 @@
+using Godot;
+using System.Collections.Generic;
+using System.Linq;
+
+// Dumps the map layout (type, transform, shape/mesh size, groups) sorted, for before/after comparison.
+// godot-mono --headless --path . tools/map_dump.tscn -- out=<file>
+public partial class MapDump : Node3D
+{
+    private int _frame;
+
+    public override void _Ready()
+    {
+        foreach (string path in RebuildMaps.Maps)
+            AddChild(GD.Load<PackedScene>(path).Instantiate());
+    }
+
+    public override void _Process(double delta)
+    {
+        if (++_frame < 3)
+            return;
+        string outPath = "/tmp/claude-1000/maps/dump.txt";
+        foreach (string a in OS.GetCmdlineUserArgs())
+            if (a.StartsWith("out="))
+                outPath = a[4..];
+        var lines = new List<string>();
+        foreach (Node map in GetChildren())
+            Walk(map, map.GetType().Name, lines);
+        lines.Sort(System.StringComparer.Ordinal);
+        System.IO.File.WriteAllLines(outPath, lines);
+        GD.Print($"MAPDUMP: {lines.Count} nodes → {outPath}");
+        GetTree().Quit();
+    }
+
+    private static string R(Vector3 v) => $"({v.X:F3},{v.Y:F3},{v.Z:F3})";
+
+    private void Walk(Node n, string map, List<string> lines)
+    {
+        foreach (Node ch in n.GetChildren())
+        {
+            string info = ch.GetClass();
+            if (ch is Node3D n3)
+            {
+                Transform3D t = n3.GlobalTransform;
+                info += $" o{R(t.Origin)} x{R(t.Basis.X)} y{R(t.Basis.Y)}";
+            }
+            if (ch is CollisionShape3D cs && cs.Shape is BoxShape3D bs) info += $" box{R(bs.Size)}";
+            if (ch is CollisionShape3D cc && cc.Shape is CylinderShape3D cy) info += $" cyl{cy.Radius:F3}/{cy.Height:F3}";
+            if (ch is CollisionShape3D cp && cp.Shape is SphereShape3D sp) info += $" sph{sp.Radius:F3}";
+            if (ch is MeshInstance3D mi && mi.GetSurfaceOverrideMaterial(0) is StandardMaterial3D m) info += $" col{m.AlbedoColor.ToHtml()} sh{(int)mi.CastShadow}";
+            if (ch is Label3D l) info += $" text[{l.Text}] px{l.PixelSize:F4}";
+            if (ch is CollisionObject3D co) info += $" L{co.CollisionLayer}/{co.CollisionMask}";
+            if (ch is RigidBody3D rb) info += $" m{rb.Mass:F2} f{rb.PhysicsMaterialOverride?.Friction:F2}";
+            var groups = ch.GetGroups().Select(g => g.ToString()).Where(g => !g.StartsWith("_")).OrderBy(g => g);
+            info += " g[" + string.Join(",", groups) + "]";
+            if (ch is Joint3D j) info += $" joint {j.GetNodeOrNull(j.NodeA)?.GetClass()}@{R((j.GetNodeOrNull(j.NodeA) as Node3D)?.GlobalPosition ?? Vector3.Zero)}-{j.GetNodeOrNull(j.NodeB)?.GetClass()}@{R((j.GetNodeOrNull(j.NodeB) as Node3D)?.GlobalPosition ?? Vector3.Zero)}";
+            if (ch.GetType().Name == "TeleportMarker" || ch.SceneFilePath != "") info += $" scene[{ch.SceneFilePath}] label[{ch.Get("MarkerLabel")}]";
+            lines.Add($"{map}: {info}");
+            if (ch.SceneFilePath == "")
+                Walk(ch, map, lines);
+        }
+    }
+}