# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

Mosis Designer is a Windows desktop application for previewing RML/RCSS files using the RmlUi library. It provides live reloading when files change in the assets directory.

## Build Commands

```bash
# Configure the build (requires vcpkg for glfw3 and freetype)
cmake -B build

# Build debug
cmake --build build --config Debug

# Build release
cmake --build build --config Release

# Build with parallel jobs
cmake --build build --parallel 4
```

## Running the Application

```bash
# Run with an RML file
./build/Debug/mosis-designer.exe assets/demo.rml
```

The application watches the parent directory of the loaded file for changes and automatically reloads.

## Architecture

Single-file C++23 application (`main.cpp`) that:
- Uses RmlUi for rendering HTML/CSS-like markup (RML/RCSS)
- Uses GLFW + OpenGL 3 backend from RmlUi
- Windows-specific file watching via `FindFirstChangeNotification`
- Automatically loads all `.ttf` fonts from the RML file's directory

## Dependencies

- **RmlUi**: Fetched via CMake FetchContent from GitHub
- **GLFW3**: Via vcpkg
- **FreeType**: Via vcpkg

## Code Style

- C++23 standard
- 4 spaces indentation
- snake_case for variables, camelCase for functions/classes
- UPPER_CASE for constants and enums
- Early returns preferred over nested conditionals
- Smart pointers over raw pointers