fix-markdown

Fix Markdown emphasis formatting by inserting spaces around markers containing brackets and special characters.

Problem

LLMs often output invalid Markdown emphasis when using Japanese brackets:

僕は**「こんにちは」**と言った。

This should be:

僕は **「こんにちは」** と言った。

Solution

This utility automatically fixes emphasis formatting by:

• Detecting brackets (「」『』（）【】) and special characters (%!?。、 etc.) within emphasis markers
• Inserting half-width spaces around the markers

Usage

import { fixMarkdown } from 'fix-markdown';

const input = '僕は**「こんにちは」**と言った。';
const fixed = fixMarkdown(input);
// Output: '僕は **「こんにちは」** と言った。'

Supported Emphasis Formats

• Bold: **text**, __text__
• Italic: *text*, _text_

Development

Install dependencies:

bun install

Run tests:

bun test

All 22 tests pass ✅