Overview

AST-based markdown and MDX formatter with Japanese text support

AST-based markdown and MDX formatter with Japanese text support. Powered by a Rust engine (via napi-rs) that parses markdown/MDX into an AST, then applies targeted line-based operations to the original source text.

Features

• Rust-powered - Native Rust engine via napi-rs, 3-7x faster than pure JS
• Hybrid formatter - Parses AST for analysis, applies edits to original source lines (no lossy round-trip)
• MDX support - Full support for MDX syntax including JSX components
• Japanese text formatting - Special handling for Japanese punctuation and URLs
• Docusaurus support - Preserves Docusaurus admonitions (:::note, :::tip, etc.)
• HTML block formatting - Proper indentation for HTML blocks (dl, table, ul, div, etc.)
• GFM features - Tables, strikethrough, task lists
• Frontmatter preservation - YAML frontmatter support
• WASM support - Browser-compatible via @takazudo/mdx-formatter-wasm
• CLI and API - Use as command-line tool or import as library
• Configurable - 10 independently toggleable rules via config file or API