Arduino code formatter

The Arduino code formatter analyzes the input sketch and applies a consistent formatting policy across files. It handles .ino to .cpp translation nuances, aligns braces, enforces indentation, and normalizes whitespace while preserving comments and preprocessor directives. The result is readable, maintainable code that conforms to user-selected style presets.
The tool uses lexical tokenization and a style map that mirrors common Arduino community conventions. It recognizes setup() and loop(), file aggregation rules, and typical Arduino constructs such as include guards and macro usage. The process is non-destructive to semantics; it only rearranges appearance and spacing.
Audience includes hobbyists, students, and teams who collaborate on embedded projects. It reduces review time, helps teach consistent practices, and makes diffs smaller and easier to review. It is suitable for repositories, classrooms, and workshop demos where consistent formatting accelerates learning.
Key differentiators include Arduino-specific handling, configurable clean style presets, and support for common preferences (2- or 4-space indentation, line-length limits, and trailing whitespace trimming). The tool focuses strictly on formatting rather than code generation or analysis, ensuring safety and predictability across use cases.