markdownlint-mcp

import { Rule } from './rule-interface'; /** * MD031: Fenced code blocks should be surrounded by blank lines * * This rule is triggered when fenced code blocks are not surrounded by blank * lines. Inserting blank lines helps to visually separate content and makes * the Markdown more readable. */ export const name = 'MD031'; export const description = 'Fenced code blocks should be surrounded by blank lines'; /** * Fix fenced code blocks by ensuring they're surrounded by blank lines * @param lines Array of string lines to fix * @returns Fixed lines array with proper spacing around code blocks */ export function fix(lines: string[]): string[] { let fixedLines: string[] = []; let inCodeBlock = false; for (let i = 0; i < lines.length; i++) { const line = lines[i]; const isFenceStart = line.trim().startsWith('```'); const isFenceEnd = inCodeBlock && line.trim() === '```'; if (isFenceStart && !inCodeBlock) { // Check if there's a blank line before the code block (unless it's the first line) const needsBlankBefore = i > 0 && lines[i-1].trim() !== ''; if (needsBlankBefore) { fixedLines.push(''); } fixedLines.push(line); inCodeBlock = true; } else if (isFenceEnd) { fixedLines.push(line); inCodeBlock = false; // Check if there's a blank line after the code block (unless it's the last line) const needsBlankAfter = i < lines.length - 1 && lines[i+1].trim() !== ''; if (needsBlankAfter) { fixedLines.push(''); } } else { fixedLines.push(line); } } return fixedLines; } /** * Rule implementation for MD031 */ export const rule: Rule = { name, description, fix }; export default rule;