Always use struct

style.md

@@ -72,13 +72,22 @@ void add_block(size_t size);
 uint32_t initial_block_size_;
 ```
 
-### Classes and Structs
-- **PascalCase** for class and struct names
-- **Prefer struct over class** - public members at the top, avoid `class { public:` pattern
+### Structs
+- **PascalCase** for struct names
+- **Always use struct** - eliminates debates about complexity and maintains consistency
+- **Public members first, private after** - leverages struct's default public access
+- Use `private:` sections when encapsulation is needed
 ```cpp
-struct ArenaAllocator {};
-struct CommitRequest {};
-struct JsonCommitRequestParser {};
+struct ArenaAllocator {
+  // Public interface first
+  explicit ArenaAllocator(size_t initial_size = 1024);
+  void* allocate_raw(size_t size);
+
+private:
+  // Private members after
+  uint32_t initial_block_size_;
+  Block* current_block_;
+};
 ```
 
 ### Enums
@@ -173,8 +182,8 @@ std::unique_ptr<Parser> parser;
 
 ## Code Structure
 
-### Class Design
-- **Move-only semantics** for resource-owning classes
+### Struct Design
+- **Move-only semantics** for resource-owning structs
 - **Explicit constructors** to prevent implicit conversions
 - **Delete copy operations** when inappropriate
 ```cpp
@@ -308,7 +317,7 @@ static_assert(std::is_trivially_destructible_v<T>, "Arena requires trivially des
 ## Documentation
 
 ### Doxygen Style
-- **/** for class and public method documentation
+- **/** for struct and public method documentation
 - **@brief** for short descriptions
 - **@param** and **@return** for function parameters
 - **@note** for important implementation notes