diff --git a/CMakeLists.txt b/CMakeLists.txt
index 978d708..bac6e38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,6 @@ set(LIB_SOURCES
     src/lexer.cpp
     src/parser.cpp
     src/value.cpp
-    src/interpreter.cpp
     src/state.cpp
     src/chunk.cpp
     src/compiler.cpp
@@ -27,7 +26,6 @@ set(LIB_HEADERS
     src/parser.h
     src/ast.h
     src/value.h
-    src/interpreter.h
     src/state.h
     src/chunk.h
     src/compiler.h
diff --git a/src/state.cpp b/src/state.cpp
index d842b3b..cfcfa22 100644
--- a/src/state.cpp
+++ b/src/state.cpp
@@ -4,171 +4,143 @@
 
 namespace camellya {
 
-State::State(ExecutionMode mode) 
-    : execution_mode_(mode),
-      interpreter_(std::make_unique<Interpreter>()),
-      vm_(std::make_unique<VM>()),
-      compiler_(std::make_unique<Compiler>()) {}
+State::State()
+    : vm_(std::make_unique<VM>()), compiler_(std::make_unique<Compiler>()) {}
 
-bool State::do_string(const std::string& script) {
-    try {
-        Lexer lexer(script);
-        auto tokens = lexer.tokenize();
-        
-        Parser parser(std::move(tokens));
-        Program program = parser.parse();
-        
-        bool success = execute_program(program);
-        if (success) {
-            last_error_.clear();
-        }
-        return success;
-    } catch (const std::exception& e) {
-        last_error_ = e.what();
-        return false;
+bool State::do_string(const std::string &script) {
+  try {
+    Lexer lexer(script);
+    auto tokens = lexer.tokenize();
+
+    Parser parser(std::move(tokens));
+    Program program = parser.parse();
+
+    bool success = execute_program(program);
+    if (success) {
+      last_error_.clear();
     }
+    return success;
+  } catch (const std::exception &e) {
+    last_error_ = e.what();
+    return false;
+  }
 }
 
-bool State::do_file(const std::string& filename) {
-    std::ifstream file(filename);
-    if (!file.is_open()) {
-        last_error_ = "Failed to open file: " + filename;
-        return false;
-    }
-    
-    std::stringstream buffer;
-    buffer << file.rdbuf();
-    return do_string(buffer.str());
+bool State::do_file(const std::string &filename) {
+  std::ifstream file(filename);
+  if (!file.is_open()) {
+    last_error_ = "Failed to open file: " + filename;
+    return false;
+  }
+
+  std::stringstream buffer;
+  buffer << file.rdbuf();
+  return do_string(buffer.str());
 }
 
-void State::register_function(const std::string& name, NativeFunction func) {
-    auto func_value = std::make_shared<FunctionValue>(name, func);
-    
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        interpreter_->global_environment->define(name, func_value);
-    } else {
-        vm_->register_native_function(name, func);
-    }
+void State::register_function(const std::string &name, NativeFunction func) {
+  auto func_value = std::make_shared<FunctionValue>(name, func);
+  vm_->register_native_function(name, func);
 }
 
-ValuePtr State::get_global(const std::string& name) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        return interpreter_->global_environment->get(name);
-    } else {
-        return vm_->get_global(name);
-    }
+ValuePtr State::get_global(const std::string &name) {
+  return vm_->get_global(name);
 }
 
-void State::set_global(const std::string& name, ValuePtr value) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        interpreter_->global_environment->define(name, value);
-    } else {
-        vm_->set_global(name, value);
-    }
+void State::set_global(const std::string &name, ValuePtr value) {
+  vm_->set_global(name, value);
 }
 
 void State::push_number(double value) {
-    stack_.push_back(std::make_shared<NumberValue>(value));
+  stack_.push_back(std::make_shared<NumberValue>(value));
 }
 
-void State::push_string(const std::string& value) {
-    stack_.push_back(std::make_shared<StringValue>(value));
+void State::push_string(const std::string &value) {
+  stack_.push_back(std::make_shared<StringValue>(value));
 }
 
 void State::push_bool(bool value) {
-    stack_.push_back(std::make_shared<BoolValue>(value));
+  stack_.push_back(std::make_shared<BoolValue>(value));
 }
 
-void State::push_nil() {
-    stack_.push_back(std::make_shared<NilValue>());
-}
+void State::push_nil() { stack_.push_back(std::make_shared<NilValue>()); }
 
-void State::push_value(ValuePtr value) {
-    stack_.push_back(std::move(value));
-}
+void State::push_value(ValuePtr value) { stack_.push_back(std::move(value)); }
 
 double State::to_number(int index) {
-    ValuePtr val = get_stack_value(index);
-    if (val && val->type() == Type::NUMBER) {
-        return std::dynamic_pointer_cast<NumberValue>(val)->value;
-    }
-    return 0.0;
+  ValuePtr val = get_stack_value(index);
+  if (val && val->type() == Type::NUMBER) {
+    return std::dynamic_pointer_cast<NumberValue>(val)->value;
+  }
+  return 0.0;
 }
 
 std::string State::to_string(int index) {
-    ValuePtr val = get_stack_value(index);
-    if (val) {
-        return val->to_string();
-    }
-    return "";
+  ValuePtr val = get_stack_value(index);
+  if (val) {
+    return val->to_string();
+  }
+  return "";
 }
 
 bool State::to_bool(int index) {
-    ValuePtr val = get_stack_value(index);
-    return is_truthy(val);
+  ValuePtr val = get_stack_value(index);
+  return is_truthy(val);
 }
 
-ValuePtr State::to_value(int index) {
-    return get_stack_value(index);
-}
+ValuePtr State::to_value(int index) { return get_stack_value(index); }
 
 void State::set_top(int index) {
-    if (index < 0) {
-        index = static_cast<int>(stack_.size()) + index + 1;
-    }
-    
-    if (index < 0) {
-        stack_.clear();
-    } else if (static_cast<size_t>(index) < stack_.size()) {
-        stack_.resize(index);
-    } else {
-        while (static_cast<size_t>(index) > stack_.size()) {
-            stack_.push_back(std::make_shared<NilValue>());
-        }
+  if (index < 0) {
+    index = static_cast<int>(stack_.size()) + index + 1;
+  }
+
+  if (index < 0) {
+    stack_.clear();
+  } else if (static_cast<size_t>(index) < stack_.size()) {
+    stack_.resize(index);
+  } else {
+    while (static_cast<size_t>(index) > stack_.size()) {
+      stack_.push_back(std::make_shared<NilValue>());
     }
+  }
 }
 
 void State::pop(int n) {
-    if (n > static_cast<int>(stack_.size())) {
-        stack_.clear();
-    } else {
-        stack_.resize(stack_.size() - n);
-    }
+  if (n > static_cast<int>(stack_.size())) {
+    stack_.clear();
+  } else {
+    stack_.resize(stack_.size() - n);
+  }
 }
 
 ValuePtr State::get_stack_value(int index) {
-    if (index < 0) {
-        index = static_cast<int>(stack_.size()) + index;
-    } else {
-        index -= 1; // Convert to 0-based
-    }
-    
-    if (index < 0 || static_cast<size_t>(index) >= stack_.size()) {
-        return nullptr;
-    }
-    
-    return stack_[index];
+  if (index < 0) {
+    index = static_cast<int>(stack_.size()) + index;
+  } else {
+    index -= 1; // Convert to 0-based
+  }
+
+  if (index < 0 || static_cast<size_t>(index) >= stack_.size()) {
+    return nullptr;
+  }
+
+  return stack_[index];
 }
 
-bool State::execute_program(const Program& program) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        // Use tree-walking interpreter
-        interpreter_->execute(program);
-        return true;
-    } else {
-        // Use VM
-        auto chunk = compiler_->compile(program);
-        if (!chunk) {
-            last_error_ = compiler_->get_error();
-            return false;
-        }
-        
-        bool success = vm_->execute(chunk);
-        if (!success) {
-            last_error_ = vm_->get_error();
-        }
-        return success;
-    }
+bool State::execute_program(const Program &program) {
+  // Use VM
+  auto chunk = compiler_->compile(program);
+  if (!chunk) {
+    last_error_ = compiler_->get_error();
+    return false;
+  }
+
+  bool success = vm_->execute(chunk);
+  if (!success) {
+    last_error_ = vm_->get_error();
+  }
+  return success;
 }
 
 } // namespace camellya
diff --git a/src/state.h b/src/state.h
index 3f01278..b2841dd 100644
--- a/src/state.h
+++ b/src/state.h
@@ -1,79 +1,66 @@
 #ifndef CAMELLYA_STATE_H
 #define CAMELLYA_STATE_H
 
+#include "compiler.h"
 #include "lexer.h"
 #include "parser.h"
-#include "interpreter.h"
-#include "vm.h"
-#include "compiler.h"
 #include "value.h"
-#include <string>
+#include "vm.h"
 #include <memory>
+#include <string>
 
 namespace camellya {
 
-// Execution mode
-enum class ExecutionMode {
-    INTERPRETER,  // Tree-walking interpreter
-    VM           // Bytecode VM
-};
-
 // Main state class - similar to lua_State
 class State {
 public:
-    State(ExecutionMode mode = ExecutionMode::VM);
-    ~State() = default;
-    
-    // Set execution mode
-    void set_execution_mode(ExecutionMode mode) { execution_mode_ = mode; }
-    ExecutionMode get_execution_mode() const { return execution_mode_; }
-    
-    // Execute script from string
-    bool do_string(const std::string& script);
-    
-    // Execute script from file
-    bool do_file(const std::string& filename);
-    
-    // Register native function
-    void register_function(const std::string& name, NativeFunction func);
-    
-    // Get global variable
-    ValuePtr get_global(const std::string& name);
-    
-    // Set global variable
-    void set_global(const std::string& name, ValuePtr value);
-    
-    // Stack operations (Lua-like API)
-    void push_number(double value);
-    void push_string(const std::string& value);
-    void push_bool(bool value);
-    void push_nil();
-    void push_value(ValuePtr value);
-    
-    double to_number(int index);
-    std::string to_string(int index);
-    bool to_bool(int index);
-    ValuePtr to_value(int index);
-    
-    int get_top() const { return static_cast<int>(stack_.size()); }
-    void set_top(int index);
-    void pop(int n = 1);
-    
-    // Error handling
-    const std::string& get_error() const { return last_error_; }
-    
+  State();
+  ~State() = default;
+
+  // Execute script from string
+  bool do_string(const std::string &script);
+
+  // Execute script from file
+  bool do_file(const std::string &filename);
+
+  // Register native function
+  void register_function(const std::string &name, NativeFunction func);
+
+  // Get global variable
+  ValuePtr get_global(const std::string &name);
+
+  // Set global variable
+  void set_global(const std::string &name, ValuePtr value);
+
+  // Stack operations (Lua-like API)
+  void push_number(double value);
+  void push_string(const std::string &value);
+  void push_bool(bool value);
+  void push_nil();
+  void push_value(ValuePtr value);
+
+  double to_number(int index);
+  std::string to_string(int index);
+  bool to_bool(int index);
+  ValuePtr to_value(int index);
+
+  int get_top() const { return static_cast<int>(stack_.size()); }
+  void set_top(int index);
+  void pop(int n = 1);
+
+  // Error handling
+  const std::string &get_error() const { return last_error_; }
+
 private:
-    ExecutionMode execution_mode_;
-    std::unique_ptr<Interpreter> interpreter_;
-    std::unique_ptr<VM> vm_;
-    std::unique_ptr<Compiler> compiler_;
-    std::vector<ValuePtr> stack_;
-    std::string last_error_;
-    
-    ValuePtr get_stack_value(int index);
-    
-    // Helper for execution
-    bool execute_program(const Program& program);
+  std::unique_ptr<VM> vm_;
+  std::unique_ptr<Compiler> compiler_;
+  std::vector<ValuePtr> stack_;
+  std::string last_error_;
+
+  ValuePtr get_stack_value(int index);
+
+  // Helper for execution
+  bool execute_program(const Program &program);
 };
 
 } // namespace camellya
diff --git a/tests/test_basic.cpp b/tests/test_basic.cpp
index f4b3bdf..cba50f2 100644
--- a/tests/test_basic.cpp
+++ b/tests/test_basic.cpp
@@ -1,82 +1,82 @@
-#include <catch2/catch_test_macros.hpp>
-#include <catch2/benchmark/catch_benchmark.hpp>
 #include "camellya.h"
+#include <catch2/benchmark/catch_benchmark.hpp>
+#include <catch2/catch_test_macros.hpp>
 
 #include <memory>
 
 using namespace camellya;
 
 TEST_CASE("basic arithmetic", "[script]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         var x = 10;
         var y = 20;
         var z = x + y;
     )";
 
-    REQUIRE(state.do_string(script));
+  REQUIRE(state.do_string(script));
 
-    auto z = state.get_global("z");
-    REQUIRE(z);
-    REQUIRE(z->type() == Type::NUMBER);
+  auto z = state.get_global("z");
+  REQUIRE(z);
+  REQUIRE(z->type() == Type::NUMBER);
 
-    auto nz = std::dynamic_pointer_cast<NumberValue>(z);
-    REQUIRE(nz);
-    REQUIRE(nz->value == 30.0);
+  auto nz = std::dynamic_pointer_cast<NumberValue>(z);
+  REQUIRE(nz);
+  REQUIRE(nz->value == 30.0);
 }
 
 TEST_CASE("basic function", "[script][func]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         func add(number x, number y) -> number {
             return x + y;
         }
         var z = add(10, 20);
     )";
 
-    REQUIRE(state.do_string(script));
+  REQUIRE(state.do_string(script));
 
-    auto z = state.get_global("z");
-    REQUIRE(z);
-    REQUIRE(z->type() == Type::NUMBER);
+  auto z = state.get_global("z");
+  REQUIRE(z);
+  REQUIRE(z->type() == Type::NUMBER);
 
-    auto nz = std::dynamic_pointer_cast<NumberValue>(z);
-    REQUIRE(nz);
-    REQUIRE(nz->value == 30.0);
+  auto nz = std::dynamic_pointer_cast<NumberValue>(z);
+  REQUIRE(nz);
+  REQUIRE(nz->value == 30.0);
 }
 
 TEST_CASE("list indexing is 0-based", "[list]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         var numbers = [10, 20, 30];
     )";
 
-    REQUIRE(state.do_string(script));
+  REQUIRE(state.do_string(script));
 
-    auto list_val = state.get_global("numbers");
-    REQUIRE(list_val);
-    REQUIRE(list_val->type() == Type::LIST);
+  auto list_val = state.get_global("numbers");
+  REQUIRE(list_val);
+  REQUIRE(list_val->type() == Type::LIST);
 
-    auto list = std::dynamic_pointer_cast<ListValue>(list_val);
-    REQUIRE(list);
-    REQUIRE(list->size() == 3);
+  auto list = std::dynamic_pointer_cast<ListValue>(list_val);
+  REQUIRE(list);
+  REQUIRE(list->size() == 3);
 
-    auto first = list->get(0);
-    auto third = list->get(2);
+  auto first = list->get(0);
+  auto third = list->get(2);
 
-    REQUIRE(first->type() == Type::NUMBER);
-    REQUIRE(third->type() == Type::NUMBER);
+  REQUIRE(first->type() == Type::NUMBER);
+  REQUIRE(third->type() == Type::NUMBER);
 
-    auto first_n = std::dynamic_pointer_cast<NumberValue>(first);
-    auto third_n = std::dynamic_pointer_cast<NumberValue>(third);
+  auto first_n = std::dynamic_pointer_cast<NumberValue>(first);
+  auto third_n = std::dynamic_pointer_cast<NumberValue>(third);
 
-    REQUIRE(first_n->value == 10.0);
-    REQUIRE(third_n->value == 30.0);
+  REQUIRE(first_n->value == 10.0);
+  REQUIRE(third_n->value == 30.0);
 }
 
 TEST_CASE("class init is called on declaration", "[class][init]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         class Person {
             var age : number;
             var name : string;
@@ -95,38 +95,37 @@ TEST_CASE("class init is called on declaration", "[class][init]") {
         var a = p.getAge();
     )";
 
-    REQUIRE(state.do_string(script));
+  REQUIRE(state.do_string(script));
 
-    auto p_val = state.get_global("p");
-    REQUIRE(p_val);
-    REQUIRE(p_val->type() == Type::INSTANCE);
+  auto p_val = state.get_global("p");
+  REQUIRE(p_val);
+  REQUIRE(p_val->type() == Type::INSTANCE);
 
-    auto instance = std::dynamic_pointer_cast<InstanceValue>(p_val);
-    REQUIRE(instance);
+  auto instance = std::dynamic_pointer_cast<InstanceValue>(p_val);
+  REQUIRE(instance);
 
-    auto age_val = instance->get("age");
-    auto name_val = instance->get("name");
+  auto age_val = instance->get("age");
+  auto name_val = instance->get("name");
 
-    REQUIRE(age_val->type() == Type::NUMBER);
-    REQUIRE(name_val->type() == Type::STRING);
+  REQUIRE(age_val->type() == Type::NUMBER);
+  REQUIRE(name_val->type() == Type::STRING);
 
-    auto age_num = std::dynamic_pointer_cast<NumberValue>(age_val);
-    auto name_str = std::dynamic_pointer_cast<StringValue>(name_val);
+  auto age_num = std::dynamic_pointer_cast<NumberValue>(age_val);
+  auto name_str = std::dynamic_pointer_cast<StringValue>(name_val);
 
-    REQUIRE(age_num->value == 18.0);
-    REQUIRE(name_str->value == "Default");
+  REQUIRE(age_num->value == 18.0);
+  REQUIRE(name_str->value == "Default");
 
-    auto a_val = state.get_global("a");
-    REQUIRE(a_val);
-    REQUIRE(a_val->type() == Type::NUMBER);
-    auto a_num = std::dynamic_pointer_cast<NumberValue>(a_val);
-    REQUIRE(a_num->value == 18.0);
+  auto a_val = state.get_global("a");
+  REQUIRE(a_val);
+  REQUIRE(a_val->type() == Type::NUMBER);
+  auto a_num = std::dynamic_pointer_cast<NumberValue>(a_val);
+  REQUIRE(a_num->value == 18.0);
 }
 
 TEST_CASE("interpreter performance: simple loop", "[perf][script]") {
-    State state;
-    State state_vm(ExecutionMode::VM);
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         func sum_to(number n) -> number {
             var s = 0;
             for (var i = 0; i < n; i = i + 1) {
@@ -137,35 +136,23 @@ TEST_CASE("interpreter performance: simple loop", "[perf][script]") {
         var r = sum_to(1000);
     )";
 
-    BENCHMARK("sum_to(1000)") {     
-        if (!state.do_string(script)) {
-            auto last_error = state.get_error();
-            REQUIRE(last_error.empty());
-        }
-        
-        auto r_val = state.get_global("r");
-        REQUIRE(r_val);
-        REQUIRE(r_val->type() == Type::NUMBER);
-        auto r_num = std::dynamic_pointer_cast<NumberValue>(r_val);
-        REQUIRE(r_num->value == 499500.0);
-    };
+  BENCHMARK("sum_to(1000)") {
+    if (!state.do_string(script)) {
+      auto last_error = state.get_error();
+      REQUIRE(last_error.empty());
+    }
 
-     BENCHMARK("state_vm sum_to(1000)") {     
-        if (!state_vm.do_string(script)) {
-            auto last_error = state_vm.get_error();
-            REQUIRE(last_error.empty());
-        }
-        auto r_val = state_vm.get_global("r");
-        REQUIRE(r_val);
-        REQUIRE(r_val->type() == Type::NUMBER);
-        auto r_num = std::dynamic_pointer_cast<NumberValue>(r_val);
-        REQUIRE(r_num->value == 499500.0);
-    };
+    auto r_val = state.get_global("r");
+    REQUIRE(r_val);
+    REQUIRE(r_val->type() == Type::NUMBER);
+    auto r_num = std::dynamic_pointer_cast<NumberValue>(r_val);
+    REQUIRE(r_num->value == 499500.0);
+  };
 }
 
 TEST_CASE("loop break", "[script][loop]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         var sum = 0;
         for (var i = 0; i < 10; i = i + 1) {
             if (i == 5) {
@@ -175,16 +162,16 @@ TEST_CASE("loop break", "[script][loop]") {
         }
     )";
 
-    REQUIRE(state.do_string(script));
-    auto sum_val = state.get_global("sum");
-    REQUIRE(sum_val);
-    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
-    REQUIRE(sum_num->value == 10.0); // 0+1+2+3+4 = 10
+  REQUIRE(state.do_string(script));
+  auto sum_val = state.get_global("sum");
+  REQUIRE(sum_val);
+  auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+  REQUIRE(sum_num->value == 10.0); // 0+1+2+3+4 = 10
 }
 
 TEST_CASE("loop continue", "[script][loop]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         var sum = 0;
         for (var i = 0; i < 5; i = i + 1) {
             if (i == 2) {
@@ -194,16 +181,16 @@ TEST_CASE("loop continue", "[script][loop]") {
         }
     )";
 
-    REQUIRE(state.do_string(script));
-    auto sum_val = state.get_global("sum");
-    REQUIRE(sum_val);
-    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
-    REQUIRE(sum_num->value == 8.0); // 0+1+3+4 = 8
+  REQUIRE(state.do_string(script));
+  auto sum_val = state.get_global("sum");
+  REQUIRE(sum_val);
+  auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+  REQUIRE(sum_num->value == 8.0); // 0+1+3+4 = 8
 }
 
 TEST_CASE("while break and continue", "[script][loop]") {
-    State state;
-    const char* script = R"(
+  State state;
+  const char *script = R"(
         var i = 0;
         var sum = 0;
         while (i < 10) {
@@ -218,16 +205,16 @@ TEST_CASE("while break and continue", "[script][loop]") {
         }
     )";
 
-    REQUIRE(state.do_string(script));
-    auto sum_val = state.get_global("sum");
-    REQUIRE(sum_val);
-    auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
-    REQUIRE(sum_num->value == 12.0); 
-    // 1st iter: i=1, sum=1
-    // 2nd iter: i=2, sum=1+2=3
-    // 3rd iter: i=3, continue
-    // 4th iter: i=4, sum=3+4=7
-    // 5th iter: i=5, sum=7+5=12
-    // 6th iter: i=6, break
-    // Result should be 12.0
+  REQUIRE(state.do_string(script));
+  auto sum_val = state.get_global("sum");
+  REQUIRE(sum_val);
+  auto sum_num = std::dynamic_pointer_cast<NumberValue>(sum_val);
+  REQUIRE(sum_num->value == 12.0);
+  // 1st iter: i=1, sum=1
+  // 2nd iter: i=2, sum=1+2=3
+  // 3rd iter: i=3, continue
+  // 4th iter: i=4, sum=3+4=7
+  // 5th iter: i=5, sum=7+5=12
+  // 6th iter: i=6, break
+  // Result should be 12.0
 }
diff --git a/tests/test_vm.cpp b/tests/test_vm.cpp
index 48642f8..05aeaac 100644
--- a/tests/test_vm.cpp
+++ b/tests/test_vm.cpp
@@ -1,154 +1,155 @@
-#include <catch2/catch_test_macros.hpp>
 #include "src/camellya.h"
+#include <catch2/catch_test_macros.hpp>
 
 using namespace camellya;
 
 TEST_CASE("VM - Basic arithmetic", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("Addition") {
-        REQUIRE(state.do_string("var x = 10 + 20;"));
-        auto x = state.get_global("x");
-        REQUIRE(x != nullptr);
-        REQUIRE(x->type() == Type::NUMBER);
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(x)->value == 30.0);
-    }
-    
-    SECTION("Subtraction") {
-        REQUIRE(state.do_string("var y = 50 - 15;"));
-        auto y = state.get_global("y");
-        REQUIRE(y != nullptr);
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(y)->value == 35.0);
-    }
-    
-    SECTION("Multiplication") {
-        REQUIRE(state.do_string("var z = 7 * 8;"));
-        auto z = state.get_global("z");
-        REQUIRE(z != nullptr);
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(z)->value == 56.0);
-    }
-    
-    SECTION("Division") {
-        REQUIRE(state.do_string("var w = 100 / 4;"));
-        auto w = state.get_global("w");
-        REQUIRE(w != nullptr);
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(w)->value == 25.0);
-    }
+  State state;
+
+  SECTION("Addition") {
+    REQUIRE(state.do_string("var x = 10 + 20;"));
+    auto x = state.get_global("x");
+    REQUIRE(x != nullptr);
+    REQUIRE(x->type() == Type::NUMBER);
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(x)->value == 30.0);
+  }
+
+  SECTION("Subtraction") {
+    REQUIRE(state.do_string("var y = 50 - 15;"));
+    auto y = state.get_global("y");
+    REQUIRE(y != nullptr);
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(y)->value == 35.0);
+  }
+
+  SECTION("Multiplication") {
+    REQUIRE(state.do_string("var z = 7 * 8;"));
+    auto z = state.get_global("z");
+    REQUIRE(z != nullptr);
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(z)->value == 56.0);
+  }
+
+  SECTION("Division") {
+    REQUIRE(state.do_string("var w = 100 / 4;"));
+    auto w = state.get_global("w");
+    REQUIRE(w != nullptr);
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(w)->value == 25.0);
+  }
 }
 
 TEST_CASE("VM - Variables and assignment", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("Variable declaration and initialization") {
-        REQUIRE(state.do_string("var a = 42;"));
-        auto a = state.get_global("a");
-        REQUIRE(a != nullptr);
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(a)->value == 42.0);
-    }
-    
-    SECTION("Variable assignment") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("Variable declaration and initialization") {
+    REQUIRE(state.do_string("var a = 42;"));
+    auto a = state.get_global("a");
+    REQUIRE(a != nullptr);
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(a)->value == 42.0);
+  }
+
+  SECTION("Variable assignment") {
+    REQUIRE(state.do_string(R"(
             var b = 10;
             b = 20;
         )"));
-        auto b = state.get_global("b");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(b)->value == 20.0);
-    }
+    auto b = state.get_global("b");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(b)->value == 20.0);
+  }
 }
 
 TEST_CASE("VM - String operations", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("String concatenation") {
-        REQUIRE(state.do_string(R"(var greeting = "Hello" + " " + "World";)"));
-        auto greeting = state.get_global("greeting");
-        REQUIRE(greeting != nullptr);
-        REQUIRE(greeting->type() == Type::STRING);
-        REQUIRE(std::dynamic_pointer_cast<StringValue>(greeting)->value == "Hello World");
-    }
+  State state;
+
+  SECTION("String concatenation") {
+    REQUIRE(state.do_string(R"(var greeting = "Hello" + " " + "World";)"));
+    auto greeting = state.get_global("greeting");
+    REQUIRE(greeting != nullptr);
+    REQUIRE(greeting->type() == Type::STRING);
+    REQUIRE(std::dynamic_pointer_cast<StringValue>(greeting)->value ==
+            "Hello World");
+  }
 }
 
 TEST_CASE("VM - Comparison operators", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("Equality") {
-        REQUIRE(state.do_string("var eq = 10 == 10;"));
-        auto eq = state.get_global("eq");
-        REQUIRE(std::dynamic_pointer_cast<BoolValue>(eq)->value == true);
-    }
-    
-    SECTION("Greater than") {
-        REQUIRE(state.do_string("var gt = 20 > 10;"));
-        auto gt = state.get_global("gt");
-        REQUIRE(std::dynamic_pointer_cast<BoolValue>(gt)->value == true);
-    }
-    
-    SECTION("Less than") {
-        REQUIRE(state.do_string("var lt = 5 < 10;"));
-        auto lt = state.get_global("lt");
-        REQUIRE(std::dynamic_pointer_cast<BoolValue>(lt)->value == true);
-    }
+  State state;
+
+  SECTION("Equality") {
+    REQUIRE(state.do_string("var eq = 10 == 10;"));
+    auto eq = state.get_global("eq");
+    REQUIRE(std::dynamic_pointer_cast<BoolValue>(eq)->value == true);
+  }
+
+  SECTION("Greater than") {
+    REQUIRE(state.do_string("var gt = 20 > 10;"));
+    auto gt = state.get_global("gt");
+    REQUIRE(std::dynamic_pointer_cast<BoolValue>(gt)->value == true);
+  }
+
+  SECTION("Less than") {
+    REQUIRE(state.do_string("var lt = 5 < 10;"));
+    auto lt = state.get_global("lt");
+    REQUIRE(std::dynamic_pointer_cast<BoolValue>(lt)->value == true);
+  }
 }
 
 TEST_CASE("VM - Lists", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("Create list") {
-        REQUIRE(state.do_string("var numbers = [1, 2, 3, 4, 5];"));
-        auto numbers = state.get_global("numbers");
-        REQUIRE(numbers != nullptr);
-        REQUIRE(numbers->type() == Type::LIST);
-        auto list = std::dynamic_pointer_cast<ListValue>(numbers);
-        REQUIRE(list->size() == 5);
-    }
-    
-    SECTION("List indexing") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("Create list") {
+    REQUIRE(state.do_string("var numbers = [1, 2, 3, 4, 5];"));
+    auto numbers = state.get_global("numbers");
+    REQUIRE(numbers != nullptr);
+    REQUIRE(numbers->type() == Type::LIST);
+    auto list = std::dynamic_pointer_cast<ListValue>(numbers);
+    REQUIRE(list->size() == 5);
+  }
+
+  SECTION("List indexing") {
+    REQUIRE(state.do_string(R"(
             var arr = [10, 20, 30];
             var item = arr[1];
         )"));
-        auto item = state.get_global("item");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(item)->value == 20.0);
-    }
+    auto item = state.get_global("item");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(item)->value == 20.0);
+  }
 }
 
 TEST_CASE("VM - Maps", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("Create map") {
-        REQUIRE(state.do_string(R"(var person = {"name": "Alice", "age": "30"};)"));
-        auto person = state.get_global("person");
-        REQUIRE(person != nullptr);
-        REQUIRE(person->type() == Type::MAP);
-    }
-    
-    SECTION("Map access") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("Create map") {
+    REQUIRE(state.do_string(R"(var person = {"name": "Alice", "age": "30"};)"));
+    auto person = state.get_global("person");
+    REQUIRE(person != nullptr);
+    REQUIRE(person->type() == Type::MAP);
+  }
+
+  SECTION("Map access") {
+    REQUIRE(state.do_string(R"(
             var data = {"key": "value"};
             var val = data["key"];
         )"));
-        auto val = state.get_global("val");
-        REQUIRE(val->type() == Type::STRING);
-        REQUIRE(std::dynamic_pointer_cast<StringValue>(val)->value == "value");
-    }
+    auto val = state.get_global("val");
+    REQUIRE(val->type() == Type::STRING);
+    REQUIRE(std::dynamic_pointer_cast<StringValue>(val)->value == "value");
+  }
 }
 
 TEST_CASE("VM - If statements", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("If branch taken") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("If branch taken") {
+    REQUIRE(state.do_string(R"(
             var x = 10;
             if (x > 5) {
                 x = 100;
             }
         )"));
-        auto x = state.get_global("x");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(x)->value == 100.0);
-    }
-    
-    SECTION("Else branch taken") {
-        REQUIRE(state.do_string(R"(
+    auto x = state.get_global("x");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(x)->value == 100.0);
+  }
+
+  SECTION("Else branch taken") {
+    REQUIRE(state.do_string(R"(
             var y = 3;
             if (y > 5) {
                 y = 100;
@@ -156,16 +157,16 @@ TEST_CASE("VM - If statements", "[vm]") {
                 y = 200;
             }
         )"));
-        auto y = state.get_global("y");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(y)->value == 200.0);
-    }
+    auto y = state.get_global("y");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(y)->value == 200.0);
+  }
 }
 
 TEST_CASE("VM - While loops", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("While loop") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("While loop") {
+    REQUIRE(state.do_string(R"(
             var counter = 0;
             var sum = 0;
             while (counter < 5) {
@@ -173,97 +174,20 @@ TEST_CASE("VM - While loops", "[vm]") {
                 counter = counter + 1;
             }
         )"));
-        auto sum = state.get_global("sum");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(sum)->value == 10.0);
-    }
+    auto sum = state.get_global("sum");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(sum)->value == 10.0);
+  }
 }
 
 TEST_CASE("VM - Native functions", "[vm]") {
-    State state(ExecutionMode::VM);
-    
-    SECTION("len function") {
-        REQUIRE(state.do_string(R"(
+  State state;
+
+  SECTION("len function") {
+    REQUIRE(state.do_string(R"(
             var arr = [1, 2, 3, 4];
             var size = len(arr);
         )"));
-        auto size = state.get_global("size");
-        REQUIRE(std::dynamic_pointer_cast<NumberValue>(size)->value == 4.0);
-    }
+    auto size = state.get_global("size");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(size)->value == 4.0);
+  }
 }
-
-TEST_CASE("VM vs Interpreter - Same results", "[vm][interpreter]") {
-    const char* script = R"(
-        var x = 10;
-        var y = 20;
-        var sum = x + y;
-        var product = x * y;
-    )";
-    
-    State vm_state(ExecutionMode::VM);
-    State interp_state(ExecutionMode::INTERPRETER);
-    
-    REQUIRE(vm_state.do_string(script));
-    REQUIRE(interp_state.do_string(script));
-    
-    auto vm_sum = vm_state.get_global("sum");
-    auto interp_sum = interp_state.get_global("sum");
-    REQUIRE(std::dynamic_pointer_cast<NumberValue>(vm_sum)->value == 
-            std::dynamic_pointer_cast<NumberValue>(interp_sum)->value);
-    
-    auto vm_product = vm_state.get_global("product");
-    auto interp_product = interp_state.get_global("product");
-    REQUIRE(std::dynamic_pointer_cast<NumberValue>(vm_product)->value == 
-            std::dynamic_pointer_cast<NumberValue>(interp_product)->value);
-}
-
-TEST_CASE("class init is called on declaration", "[vm][class][init]") {
-    State state(ExecutionMode::VM);
-    const char* script = R"(
-        class Person {
-            var age : number;
-            var name : string;
-
-            func init() -> nil {
-                age = 18;
-                name = "Default";
-            }
-
-            func getAge() -> number {
-                return this.age;
-            }
-        }
-
-        var p : Person;
-        var a = p.getAge();
-    )";
-
-    auto ret = state.do_string(script);
-    if(!ret) {
-        REQUIRE(state.get_error() == "");
-    }
-
-    auto p_val = state.get_global("p");
-    REQUIRE(p_val);
-    REQUIRE(p_val->type() == Type::INSTANCE);
-
-    auto instance = std::dynamic_pointer_cast<InstanceValue>(p_val);
-    REQUIRE(instance);
-
-    auto age_val = instance->get("age");
-    auto name_val = instance->get("name");
-
-    REQUIRE(age_val->type() == Type::NUMBER);
-    REQUIRE(name_val->type() == Type::STRING);
-
-    auto age_num = std::dynamic_pointer_cast<NumberValue>(age_val);
-    auto name_str = std::dynamic_pointer_cast<StringValue>(name_val);
-
-    REQUIRE(age_num->value == 18.0);
-    REQUIRE(name_str->value == "Default");
-
-    auto a_val = state.get_global("a");
-    REQUIRE(a_val);
-    REQUIRE(a_val->type() == Type::NUMBER);
-    auto a_num = std::dynamic_pointer_cast<NumberValue>(a_val);
-    REQUIRE(a_num->value == 18.0);
-}
\ No newline at end of file