diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 00000000..86f7aa8a
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,216 @@
+# OpenGraph Copilot Instructions
+
+This file contains coding guidelines and conventions for AI assistants working on the OpenGraph project.
+
+## Quick Reference
+
+### Key Principles
+- Use `swift-testing` framework with `#expect` macro (not XCTest)
+- Follow OpenGraph C++ and Swift interop patterns
+- Trim trailing whitespaces automatically
+- Use 4-space indentation consistently
+
+## Testing Guidelines
+
+### Testing Framework
+
+- Use the `swift-testing` framework with the `#expect` macro for all test assertions
+- Import testing framework with: `import Testing`
+- Do NOT use XCTest framework unless specifically required for compatibility
+
+### Test Structure
+
+```swift
+import Testing
+
+struct OpenGraphTests {
+    @Test
+    func functionality() {
+        let value = SomeType()
+        
+        #expect(value.property == expectedValue)
+        #expect(value.method() == expectedResult)
+    }
+
+    @Test
+    func errorConditions() {
+        #expect(throws: SomeError.self) {
+            try riskyOperation()
+        }
+    }
+}
+```
+
+### Test Conventions
+
+- **Do NOT write any comments in test case body** - keep test code clean and self-explanatory
+- Use descriptive test function names that clearly indicate what is being tested
+- Group related tests using `// MARK: -` sections
+- Use `#expect` for all assertions instead of XCTest assertions
+- Prefer multiple focused tests over one large test
+- Do not add test prefix to test function names (e.g., `testFunctionality` should be `functionality`)
+- Use `@Test` attribute for test functions
+
+## Code Organization
+
+### File Structure
+- Use `// MARK: -` to separate different topics and sections within files
+- Organize code logically with clear separation of concerns
+- Place imports at the top, followed by type definitions, then implementations
+
+### Example MARK Usage
+```swift
+// MARK: - A
+
+...
+
+// MARK: - B
+
+...
+
+// MARK: - C
+
+...
+```
+
+## Swift Coding Style
+
+### Access Control Hierarchy
+
+1. `public` - External API surface
+2. `internal` - Module-internal APIs (default and should be omitted if not needed)
+3. `private` - Implementation details
+
+### Naming Conventions
+
+- Follow Swift API Design Guidelines
+- Use descriptive names that clearly indicate purpose
+- Prefer full words over abbreviations
+- Use camelCase for variables, functions, and properties
+- Use PascalCase for types, protocols, and cases
+
+### Code Formatting Rules
+
+- **Automatically trim trailing whitespaces including whitespace-only lines**
+- Use consistent indentation (4 spaces, not tabs)
+- Place opening braces on the same line as the declaration
+- Use proper spacing around operators and after commas
+- Align code vertically when it improves readability
+- Maximum line length: 120 characters (soft limit)
+
+## C++ Coding Style
+
+### OpenGraphCxx Guidelines
+
+- Follow existing OpenGraph C++ patterns and conventions
+- Use `OG_INLINE` and `OG_CONSTEXPR` macros for inline and constexpr functions
+- Use `OG_NOEXCEPT` for exception specifications
+- Maintain compatibility with existing OpenGraph APIs
+- Use proper header guards with project-specific naming
+
+### Memory Management
+
+- Use RAII principles for resource management
+- Prefer smart pointers and custom deleters for automatic cleanup
+- Use `ptr<T>` template for OpenGraph-specific pointer management
+- Implement proper validation and assertion mechanisms
+
+### Template Usage
+
+```cpp
+template <typename T>
+class ptr {
+    // Implementation following OpenGraph patterns
+};
+```
+
+## Architecture Patterns
+
+### OpenGraph Compatibility
+- Maintain API compatibility with existing OpenGraph functionality
+- Use similar naming conventions and parameter patterns
+- Implement protocols and extensions that mirror OpenGraph's design
+
+### Module Organization
+- Keep related functionality in appropriate modules
+- Use clear module boundaries between OpenGraphCxx and Swift layers
+- Avoid circular dependencies between modules
+
+### C++/Swift Interop
+- Use proper bridging headers for C++ integration
+- Ensure memory safety across language boundaries
+- Handle exceptions and errors appropriately at boundaries
+
+## Documentation
+
+### Code Comments
+- Write clear, concise comments for complex logic
+- Use documentation comments (`///`) for APIs documentation
+- Avoid obvious comments that don't add value
+- Keep comments up-to-date with code changes
+
+### API Documentation
+```swift
+/// A brief description of what this function does.
+/// 
+/// - Parameter value: Description of the parameter
+/// - Returns: Description of the return value
+/// - Throws: Description of potential errors
+func someFunction(value: String) throws -> Int {
+    // Implementation
+}
+```
+
+## Performance Considerations
+
+- Optimize memory allocation patterns using OpenGraph's table/page system
+- Use lazy initialization for expensive computations
+- Consider memory management and avoid retain cycles
+- Optimize for common use cases while maintaining flexibility
+- Profile memory usage patterns in graph operations
+
+## Dependencies and Imports
+
+### Swift Files
+- Minimize external dependencies
+- Use conditional compilation for platform-specific code
+- Import only what is needed
+- Organize imports alphabetically within groups
+
+### C++ Files
+- Use proper header inclusion guards
+- Include OpenGraph base headers first
+- Follow dependency order in include statements
+- Use forward declarations when possible
+
+## Platform Compatibility
+
+- Support multiple Apple platforms (iOS, macOS, watchOS, tvOS, visionOS)
+- Use availability annotations when using platform-specific APIs
+- Test on supported platform versions
+- Use feature detection rather than version checking when possible
+- Handle platform differences in C++ code using preprocessor directives
+
+## Memory and Data Management
+
+### OpenGraph Patterns
+- Use `data::table` for memory region management
+- Implement proper page allocation and deallocation
+- Use `ptr<T>` for type-safe offset-based pointers
+- Follow OpenGraph's zone-based memory organization
+
+### Validation and Assertions
+- Use `assert_valid` methods for pointer validation
+- Implement proper precondition checking
+- Use OpenGraph's assertion macros consistently
+- Handle edge cases gracefully
+
+---
+
+## Troubleshooting
+
+### Common Issues
+- **Build errors**: Check C++/Swift bridging and header paths
+- **Test failures**: Ensure using `#expect` not XCTest assertions
+- **Memory issues**: Verify proper pointer validation and table usage
+- **Interop problems**: Check Swift/C++ type compatibility
diff --git a/Sources/OpenGraphCxx/include/OpenGraphCxx/Data/zone.hpp b/Sources/OpenGraphCxx/include/OpenGraphCxx/Data/zone.hpp
index 3ca30182..955f4920 100644
--- a/Sources/OpenGraphCxx/include/OpenGraphCxx/Data/zone.hpp
+++ b/Sources/OpenGraphCxx/include/OpenGraphCxx/Data/zone.hpp
@@ -43,7 +43,7 @@ class zone {
             return info(zone_id(), deleted);
         }
     private:
-        enum {
+        enum : uint32_t {
             zone_id_mask = 0x7fffffff,
             deleted = 0x80000000,
         };
diff --git a/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/cf_ptr.hpp b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/cf_ptr.hpp
new file mode 100644
index 00000000..59f78326
--- /dev/null
+++ b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/cf_ptr.hpp
@@ -0,0 +1,107 @@
+//
+//  cf_ptr.hpp
+//  OpenGraphCxx
+//
+//  Status: Complete
+//  Modified based Compute code
+
+#ifndef OPENGRAPH_CXX_UTIL_CF_PTR_HPP
+#define OPENGRAPH_CXX_UTIL_CF_PTR_HPP
+
+#include <OpenGraph/OGBase.h>
+#include <CoreFoundation/CoreFoundation.h>
+
+OG_ASSUME_NONNULL_BEGIN
+
+namespace util {
+
+template <typename T> class cf_ptr {
+private:
+    CFTypeRef _storage;
+
+    static OG_INLINE CFTypeRef to_storage(T ref) { return (CFTypeRef)(ref); }
+    static OG_INLINE T from_storage(CFTypeRef storage) { return (T)storage; }
+
+public:
+    OG_CONSTEXPR cf_ptr() OG_NOEXCEPT : _storage(nullptr) {}
+    OG_CONSTEXPR cf_ptr(std::nullptr_t) OG_NOEXCEPT : _storage(nullptr) {}
+
+    explicit cf_ptr(T ref) : _storage(to_storage(ref)) {
+       if (_storage) {
+           CFRetain(_storage);
+       }
+    }
+
+    ~cf_ptr() {
+       if (_storage) {
+           CFRelease(_storage);
+       }
+    }
+
+    // Copy and move constructors
+
+    cf_ptr(const cf_ptr &other) OG_NOEXCEPT : _storage(other._storage) {
+       if (_storage) {
+           CFRetain(_storage);
+       }
+    };
+
+    cf_ptr(cf_ptr &&other) OG_NOEXCEPT : _storage(std::exchange(other._storage, nullptr)) {};
+
+    // Copy and move assignment operators
+
+    cf_ptr &operator=(const cf_ptr &other) OG_NOEXCEPT {
+       if (this != &other) {
+           if (_storage) {
+               CFRelease(_storage);
+           }
+           _storage = other._storage;
+           if (_storage) {
+               CFRetain(_storage);
+           }
+       }
+       return *this;
+    };
+
+    cf_ptr &operator=(cf_ptr &&other) OG_NOEXCEPT {
+       if (this != &other) {
+           if (_storage) {
+               CFRelease(_storage);
+           }
+           _storage = other._storage;
+           other._storage = nullptr;
+       }
+       return *this;
+    }
+
+    // Modifiers
+
+    void reset() OG_NOEXCEPT { reset(nullptr); }
+
+    void reset(T ref = nullptr) OG_NOEXCEPT {
+       if (_storage != ref) {
+           if (_storage) {
+               CFRelease(_storage);
+           }
+           _storage = to_storage(ref);
+           if (_storage) {
+               CFRetain(_storage);
+           }
+       }
+    }
+
+    // Observers
+
+    T get() const OG_NOEXCEPT { return from_storage(_storage); };
+
+    explicit operator bool() const OG_NOEXCEPT { return _storage != nullptr; }
+}; /* class cf_ptr */
+
+using cf_data_ptr = cf_ptr<CFDataRef>;
+using cf_mutable_data_ptr = cf_ptr<CFMutableDataRef>;
+
+} /* namespace util */
+
+OG_ASSUME_NONNULL_END
+
+#endif /* OPENGRAPH_CXX_UTIL_CF_PTR_HPP */
diff --git a/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/free_deleter.hpp b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/free_deleter.hpp
new file mode 100644
index 00000000..820b2093
--- /dev/null
+++ b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/free_deleter.hpp
@@ -0,0 +1,30 @@
+//
+//  free_deleter.hpp
+//  OpenGraphCxx
+//
+//  Status: Complete
+//  Modified based Compute code
+
+#ifndef OPENGRAPH_CXX_UTIL_FREE_DELETER_HPP
+#define OPENGRAPH_CXX_UTIL_FREE_DELETER_HPP
+
+#include <OpenGraph/OGBase.h>
+
+OG_ASSUME_NONNULL_BEGIN
+
+namespace util {
+
+class free_deleter {
+public:
+    template <typename T> void operator()(T *_Nullable ptr) {
+       if (ptr) {
+           free((void *)ptr);
+       }
+    }
+}; /* class free_deleter */
+
+} /* namespace util */
+
+OG_ASSUME_NONNULL_END
+
+#endif /* OPENGRAPH_CXX_UTIL_FREE_DELETER_HPP */
diff --git a/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/objc_ptr.hpp b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/objc_ptr.hpp
new file mode 100644
index 00000000..4e1d0e17
--- /dev/null
+++ b/Sources/OpenGraphCxx/include/OpenGraphCxx/Util/objc_ptr.hpp
@@ -0,0 +1,115 @@
+//
+//  objc_ptr.hpp
+//  OpenGraphCxx
+//
+//  Status: Complete
+//  Modified based Compute code
+
+#ifndef OPENGRAPH_CXX_UTIL_OBJC_PTR_HPP
+#define OPENGRAPH_CXX_UTIL_OBJC_PTR_HPP
+
+#include <OpenGraph/OGBase.h>
+
+#if OG_TARGET_OS_DARWIN
+#include <objc/objc.h>
+#include <objc/runtime.h>
+
+OG_ASSUME_NONNULL_BEGIN
+
+// Redeclare APIs from the Objective-C runtime.
+// These functions are not available through public headers, but are guaranteed
+// to exist on OS X >= 10.9 and iOS >= 7.0.
+OBJC_EXPORT id objc_retain(id obj);
+OBJC_EXPORT void objc_release(id obj);
+
+namespace util {
+
+template <typename T> class objc_ptr {
+private:
+    id _storage;
+
+    static OG_INLINE id to_storage(T obj) { return (id)obj; }
+    static OG_INLINE T from_storage(id storage) { return (T)storage; }
+
+public:
+    OG_CONSTEXPR objc_ptr() OG_NOEXCEPT : _storage(nil) {}
+    OG_CONSTEXPR objc_ptr(std::nullptr_t) OG_NOEXCEPT : _storage(nil) {}
+
+    explicit objc_ptr(T obj) : _storage(to_storage(obj)) {
+       if (_storage) {
+           objc_retain(_storage);
+       }
+    }
+
+    ~objc_ptr() {
+       if (_storage) {
+           objc_release(_storage);
+       }
+    }
+
+    // MARK: - Copy and move constructors
+
+    objc_ptr(const objc_ptr &other) OG_NOEXCEPT : _storage(other._storage) {
+       if (_storage) {
+           objc_retain(_storage);
+       }
+    }
+
+    objc_ptr(objc_ptr &&other) OG_NOEXCEPT : _storage(other._storage) {
+       other._storage = nil;
+    }
+
+    // MARK: -  Copy and move assignment operators
+
+    objc_ptr &operator=(const objc_ptr &other) OG_NOEXCEPT {
+       if (this != &other) {
+           if (_storage) {
+               objc_release(_storage);
+           }
+           _storage = other._storage;
+           if (_storage) {
+               objc_retain(_storage);
+           }
+       }
+       return *this;
+    }
+
+    objc_ptr &operator=(objc_ptr &&other) OG_NOEXCEPT {
+       if (this != &other) {
+           if (_storage) {
+               objc_release(_storage);
+           }
+           _storage = other._storage;
+           other._storage = nil;
+       }
+       return *this;
+    }
+
+    // MARK: - Modifiers
+
+    void reset() OG_NOEXCEPT { reset(nil); }
+
+    void reset(T obj = nil) OG_NOEXCEPT {
+       if (_storage != obj) {
+           if (_storage) {
+               objc_release(_storage);
+           }
+           _storage = to_storage(obj);
+           if (_storage) {
+               objc_retain(_storage);
+           }
+       }
+    }
+
+    T get() const OG_NOEXCEPT { return from_storage(_storage); }
+
+    explicit operator bool() const OG_NOEXCEPT { return _storage != nil; }
+}; /* class objc_ptr */
+
+} /* namespace util */
+
+OG_ASSUME_NONNULL_END
+
+#endif
+
+#endif /* OPENGRAPH_CXX_UTIL_OBJC_PTR_HPP */
diff --git a/Sources/OpenGraphCxx/include/module.private.modulemap b/Sources/OpenGraphCxx/include/module.private.modulemap
index 224fd911..62efad57 100644
--- a/Sources/OpenGraphCxx/include/module.private.modulemap
+++ b/Sources/OpenGraphCxx/include/module.private.modulemap
@@ -44,6 +44,13 @@ module OpenGraphCxx_Private.Runtime {
     export *
 }
 
+module OpenGraphCxx_Private.Util {
+    requires cplusplus
+    umbrella "OpenGraphCxx/Util"
+    export *
+    module * { export * }
+}
+
 module OpenGraphCxx_Private.Vector {
     requires cplusplus
     umbrella "OpenGraphCxx/Vector"