diff --git a/scripts/world/ChunkData.cs b/scripts/world/ChunkData.cs
new file mode 100644
index 0000000..d58b8d1
--- /dev/null
+++ b/scripts/world/ChunkData.cs
@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+
+public record ChunkData(
+	int schema,
+	string id,
+	int x,
+	int y,
+	string? biome,
+	List<ChunkPickup>? pickups,
+	List<ChunkGate>? gates,
+	List<ChunkNpc>? npcs,
+	List<ChunkSpawnZone>? spawn_zones,
+	List<ChunkCollisionRect>? collision_rects
+);
+
+public record ChunkPickup(string id, string item, int[] pos, int respawn_seconds);
+public record ChunkGate(string id, int[] rect, string requires, string? message);
+public record ChunkNpc(string id, string kind, int[] pos, string @ref);
+public record ChunkSpawnZone(string id, string biome, int[] rect, List<string>? time_windows, List<string>? weather);
+public record ChunkCollisionRect(string id, int[] rect);
diff --git a/scripts/world/ChunkData.cs.uid b/scripts/world/ChunkData.cs.uid
new file mode 100644
index 0000000..03f48b9
--- /dev/null
+++ b/scripts/world/ChunkData.cs.uid
@@ -0,0 +1 @@
+uid://bxjiroh5ymv1m
diff --git a/scripts/world/ChunkManager.cs b/scripts/world/ChunkManager.cs
index 97d1677..eec9bbd 100644
--- a/scripts/world/ChunkManager.cs
+++ b/scripts/world/ChunkManager.cs
@@ -97,12 +97,19 @@ public partial class ChunkManager : Node2D
 			GD.PrintErr($"Chunk missing in packs: {relPath}");
 			return;
 		}
-
+		
 		var chunkJson = FileAccess.GetFileAsString(chunkPath);
-		using var doc = JsonDocument.Parse(chunkJson);
-		var biome = doc.RootElement.TryGetProperty("biome", out var b) ? b.GetString() : "biome:unknown";
+		var data = JsonSerializer.Deserialize<ChunkData>(chunkJson);
+		if (data == null)
+		{
+			GD.PrintErr($"Failed to parse chunk: {chunkPath}");
+			return;
+		}
 
-		var node = CreateDebugChunkNode(x, y, _world!.chunk_size_px, biome ?? "biome:unknown");
+		var biome = data.biome ?? "biome:unknown";
+
+		var node = CreateDebugChunkNode(x, y, _world!.chunk_size_px, biome);
+		AddChunkMarkers(node, data);
 		AddChild(node);
 		_loaded[key] = node;
 	}
@@ -138,4 +145,58 @@ public partial class ChunkManager : Node2D
 		n.AddChild(rect);
 		return n;
 	}
+	
+	private static void AddChunkMarkers(Node2D chunkNode, ChunkData data)
+	{
+		// Pickups: small green squares
+		if (data.pickups != null)
+		{
+			foreach (var p in data.pickups)
+			{
+				var r = new ColorRect
+				{
+					Size = new Vector2(10, 10),
+					Color = new Color(0.2f, 1.0f, 0.2f, 0.9f),
+					MouseFilter = Control.MouseFilterEnum.Ignore,
+					Position = new Vector2(p.pos[0] - 5, p.pos[1] - 5)
+				};
+				chunkNode.AddChild(r);
+			}
+		}
+
+		// NPCs: blue squares
+		if (data.npcs != null)
+		{
+			foreach (var n in data.npcs)
+			{
+				var r = new ColorRect
+				{
+					Size = new Vector2(12, 12),
+					Color = new Color(0.2f, 0.5f, 1.0f, 0.9f),
+					MouseFilter = Control.MouseFilterEnum.Ignore,
+					Position = new Vector2(n.pos[0] - 6, n.pos[1] - 6)
+				};
+				chunkNode.AddChild(r);
+			}
+		}
+
+		// Gates: red rectangles
+		if (data.gates != null)
+		{
+			foreach (var g in data.gates)
+			{
+				var rect = g.rect; // [x,y,w,h]
+				var r = new ColorRect
+				{
+					Size = new Vector2(rect[2], rect[3]),
+					Color = new Color(1.0f, 0.2f, 0.2f, 0.35f),
+					MouseFilter = Control.MouseFilterEnum.Ignore,
+					Position = new Vector2(rect[0], rect[1])
+				};
+				chunkNode.AddChild(r);
+			}
+		}
+
+		// Collision rects: gray outlines (optional later)
+	}
 }