diff --git a/dart/ClassId.h b/dart/ClassId.h
index 6d9f4f0..fed1da1 100644
--- a/dart/ClassId.h
+++ b/dart/ClassId.h
@@ -7,7 +7,7 @@
 
 namespace Dart {
 
-    enum class ClassId {
+    enum class ClassId: uint64_t {
         Illegal = 0,
         NativePointer = 1,
         FreeListElement = 2,
diff --git a/dart/Snapshot.cpp b/dart/Snapshot.cpp
index 2fb0deb..27bb782 100644
--- a/dart/Snapshot.cpp
+++ b/dart/Snapshot.cpp
@@ -3,6 +3,7 @@
 //
 
 #include "Snapshot.h"
+#include "ClassId.h"
 #include <stdexcept>
 #include <ranges>
 #include <sstream>
@@ -42,6 +43,18 @@ namespace Dart {
         _fieldTableLength = Leb128Int(data);
         data += _fieldTableLength.size();
 
+        _instructionsTableLength = Leb128Int(data);
+        data += _instructionsTableLength.size();
+
+        uint64_t cidAndCanonical = *(uint64_t*)data;
+        uint64_t cid = (cidAndCanonical >> 1) & 0xFFFFFFFF;
+        bool canonical = cidAndCanonical & 1;
+
+        // If non-predefined (instance) cid
+        if (cid >= (uint64_t)ClassId::NumPredefined || cid == (uint64_t)ClassId::Instance) {
+
+        }
+
         auto nextInt = Leb128Int(data);
         auto val = nextInt.value();
         auto size = nextInt.size();
@@ -56,7 +69,7 @@ namespace Dart {
             case Kind::FULL: return "Full";
             case Kind::FULL_JIT: return "Full JIT";
             case Kind::FULL_AOT: return "Full AOT";
-            case Kind::MESSAGE: return "Message";
+            case Kind::FULL_CORE: return "Full core";
             case Kind::NONE: return "None";
             case Kind::INVALID: return "Invalid";
         }
@@ -109,4 +122,8 @@ namespace Dart {
         return _fieldTableLength.value();
     }
 
+    uint64_t Snapshot::instructionsTableLength() const {
+        return _instructionsTableLength.value();
+    }
+
 }
diff --git a/dart/Snapshot.h b/dart/Snapshot.h
index 0843fe9..e07f145 100644
--- a/dart/Snapshot.h
+++ b/dart/Snapshot.h
@@ -17,7 +17,7 @@ namespace Dart {
     class Snapshot {
     public:
         enum class Kind: uint64_t {
-            FULL, FULL_JIT, FULL_AOT, MESSAGE, NONE, INVALID
+            FULL, FULL_CORE, FULL_JIT, FULL_AOT, NONE, INVALID
         };
 
         static const uint32_t MAGIC = 0xDCDCF5F5;
@@ -32,6 +32,7 @@ namespace Dart {
         Leb128Int _allObjectsCount;
         Leb128Int _clustersCount;
         Leb128Int _fieldTableLength;
+        Leb128Int _instructionsTableLength;
 
     private:
         static std::vector<std::string> split(const std::string &str);
@@ -46,6 +47,7 @@ namespace Dart {
         [[nodiscard]] uint64_t allObjectsCount() const;
         [[nodiscard]] uint64_t clustersCount() const;
         [[nodiscard]] uint64_t fieldTableLength() const;
+        [[nodiscard]] uint64_t instructionsTableLength() const;
     };
 
 }
diff --git a/main.cpp b/main.cpp
index bf9a792..12b20d5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -13,6 +13,7 @@ int main(int argc, char** argv) {
     std::cout << "All objects: " << snapshot.allObjectsCount() << std::endl;
     std::cout << "Clusters: " << snapshot.clustersCount() << std::endl;
     std::cout << "Field table length: " << snapshot.fieldTableLength() << std::endl;
+    std::cout << "Instructions table length: " << snapshot.instructionsTableLength() << std::endl;
 
     return 0;
 }