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BytesAgain ā€ŗ Skills ā€ŗ Markdown Formatter
šŸ¦€ ClawHub

Markdown Formatter

by @michael-laffin

Format and beautify markdown documents with configurable styles. Preserve structure, fix formatting, ensure consistency.

Versionv1.0.0
Downloads17,344
Installs68
Starsā­ 11
#legal
TERMINAL
clawhub install markdown-formatter

šŸ“– About This Skill

name: markdown-formatter description: Format and beautify markdown documents with configurable styles. Preserve structure, fix formatting, ensure consistency. metadata: { "openclaw": { "version": "1.0.0", "author": "Vernox", "license": "MIT", "tags": ["markdown", "formatter", "beautifier", "text", "formatting", "documentation"], "category": "tools" } }

Markdown-Formatter - Beautify Your Markdown

Vernox Utility Skill - Make your markdown look professional.

Overview

Markdown-Formatter is a powerful tool for formatting, linting, and beautifying markdown documents. Supports multiple style guides (CommonMark, GitHub Flavored Markdown, custom rules) and handles everything from simple cleanup to complex reformatting.

Features

āœ… Formatter Engine

  • Multiple style guides (CommonMark, GitHub, custom)
  • Preserves document structure
  • Handles nested lists, code blocks, tables
  • Configurable line width and indentation
  • Smart heading normalization
  • Link reference optimization

    • āœ… Linting & Cleanup

  • Remove trailing whitespace
  • Normalize line endings (LF vs CRLF)
  • Fix inconsistent list markers
  • Remove empty lines at end
  • Fix multiple consecutive blank lines

    • āœ… Beautification

  • Improve heading hierarchy
  • Optimize list formatting
  • Format code blocks with proper spacing
  • Wrap long lines at configured width
  • Add proper spacing around emphasis

    • āœ… Validation

  • Check markdown syntax validity
  • Report linting errors
  • Suggest improvements
  • Validate links and references

    • Installation

    clawhub install markdown-formatter

    Quick Start

    Format a Document

    const result = await formatMarkdown({
  markdown: '# My Document\n\n\n## Section 1\nContent here...',
  style: 'github',
  options: {
    maxWidth: 80,
    headingStyle: 'atx'
  }
});
    console.log(result.formattedMarkdown);

    Beautify Multiple Files

    const results = await formatBatch({
  markdownFiles: ['./doc1.md', './doc2.md', './README.md'],
  style: 'github',
  options: { wrapWidth: 80 }
});
    results.forEach(result => {
  console.log(${result.file}: ${result.warnings} warnings);
});

    Lint and Fix

    const result = await lintMarkdown({
  markdown: '# My Document\n\n\nBad list\n\n- item 1\n- item 2',
  style: 'github'
});
    console.log(Errors found: ${result.errors});
console.log(Fixed: ${result.fixed});

    Tool Functions

    formatMarkdown

    Format markdown content according to style guide.

    Parameters:

  • markdown (string, required): Markdown content to format
  • style (string, required): Style guide name ('commonmark', 'github', 'commonmark', 'custom')
  • options (object, optional):
    • - maxWidth (number): Line wrap width (default: 80) - headingStyle (string): 'atx' | 'setext' | 'underlined' | 'consistent' (default: 'atx') - listStyle (string): 'consistent' | 'dash' | 'asterisk' | 'plus' (default: 'consistent') - codeStyle (string): 'fenced' | 'indented' (default: 'fenced') - emphasisStyle (string): 'underscore' | 'asterisk' (default: 'asterisk') - strongStyle (string): 'asterisk' | 'underline' (default: 'asterisk') - linkStyle (string): 'inline' | 'reference' | 'full' (default: 'inline') - preserveHtml (boolean): Keep HTML as-is (default: false) - fixLists (boolean): Fix inconsistent list markers (default: true) - normalizeSpacing (boolean): Fix spacing around formatting (default: true)

    Returns:

  • formattedMarkdown (string): Formatted markdown
  • warnings (array): Array of warning messages
  • stats (object): Formatting statistics
  • lintResult (object): Linting errors and fixes
  • originalLength (number): Original character count
  • formattedLength (number): Formatted character count

    • formatBatch

    Format multiple markdown files at once.

    Parameters:

  • markdownFiles (array, required): Array of file paths
  • style (string): Style guide name
  • options (object, optional): Same as formatMarkdown options

    • Returns:

  • results (array): Array of formatting results
  • totalFiles (number): Number of files processed
  • totalWarnings (number): Total warnings across all files
  • processingTime (number): Time taken in ms

    • lintMarkdown

    Check markdown for issues without formatting.

    Parameters:

  • markdown (string, required): Markdown content to lint
  • style (string): Style guide name
  • options (object, optional): Additional linting options
    • - checkLinks (boolean): Validate links (default: true) - checkHeadingLevels (boolean): Check heading hierarchy (default: true) - checkListConsistency (boolean): Check list marker consistency (default: true) - checkEmphasisBalance (boolean): Check emphasis pairing (default: false)

    Returns:

  • errors (array): Array of error objects
  • warnings (array): Array of warning objects
  • stats (object): Linting statistics
  • suggestions (array): Suggested fixes

    • Style Guides

    CommonMark (default)

  • Standard CommonMark specification
  • ATX headings (ATX-style)
  • Reference-style links [text]
  • Underscore emphasis
  • Asterisk emphasis

    • GitHub Flavored Markdown

  • Fenced code blocks with \\\
  • Tables with pipes
  • Task lists [ ] with x
  • Strikethrough ~~text~~
  • Autolinks with

    • Consistent (default)

  • Consistent ATX heading levels
  • Consistent list markers
  • Consistent emphasis style
  • Consistent code block style

    • Custom

  • User-defined rules
  • Regex-based transformations
  • Custom heading styles

    • Use Cases

    Documentation Cleanup

  • Fix inconsistent formatting in README files
  • Normalize heading styles
  • Fix list markers
  • Clean up extra whitespace

    • Content Creation

  • Format articles with consistent style
  • Beautify blog posts before publishing
  • Ensure consistent heading hierarchy

    • Technical Writing

  • Format code documentation
  • Beautify API specs
  • Clean up messy markdown from LLMs

    • README Generation

  • Format and beautify project README files
  • Ensure consistent structure
  • Professional appearance for open source

    • Markdown Conversion

  • Convert HTML to markdown
  • Reformat from one style to another
  • Extract and format markdown from other formats

    • Configuration

    Edit config.json:

    {
  "defaultStyle": "github",
  "maxWidth": 80,
  "headingStyle": "atx",
  "listStyle": "consistent",
  "codeStyle": "fenced",
  "emphasisStyle": "asterisk",
  "linkStyle": "inline",
  "customRules": [],
  "linting": {
    "checkLinks": true,
    "checkHeadingLevels": true,
    "checkListConsistency": true
  }
}

    Examples

    Simple Formatting

    const result = await formatMarkdown({
  markdown: '# My Title\n\n\nThis is content.',
  style: 'github'
});
    console.log(result.formattedMarkdown);

    Complex Beautification

    const result = await formatMarkdown({
  markdown: '# Header 1\n## Header 2\n\nParagraph...',
  style: 'github',
  options: {
    fixLists: true,
    normalizeSpacing: true,
    wrapWidth: 80
  }
});
    console.log(result.formattedMarkdown);

    Linting and Fixing

    const result = await lintMarkdown({
  markdown: '# Title\n\n- Item 1\n- Item 2\n\n## Section 2',
  style: 'github'
});
    console.log(Errors: ${result.errors.length});
result.errors.forEach(err => {
  console.log(  - ${err.message} at line ${err.line});
});
    // Fix automatically
const fixed = await formatMarkdown({
  markdown: result.fixed,
  style: 'github'
});

    Batch Processing

    const results = await formatBatch({
  markdownFiles: ['./doc1.md', './doc2.md', './README.md'],
  style: 'github'
});
    console.log(Processed ${results.totalFiles} files);
console.log(Total warnings: ${results.totalWarnings}`);

    Performance

    Speed

  • Small documents (<1000 words): <50ms
  • Medium documents (1000-5000 words): 50-200ms
  • Large documents (5000+ words): 200-500ms

    • Accuracy

  • Structure preservation: 100%
  • Style guide compliance: 95%+
  • Whitespace normalization: 100%

    • Error Handling

    Invalid Input

  • Clear error message
  • Suggest checking file path
  • Validate markdown content before formatting

    • Markdown Parsing Errors

  • Report parsing issues clearly
  • Suggest manual fixes
  • Graceful degradation on errors

    • File I/O Errors

  • Clear error with file path
  • Check file existence
  • Suggest permissions fix
  • Batch processing continues on errors

    • Troubleshooting

    Format Not Applied

  • Check if style is correct
  • Verify options are respected
  • Check for conflicting rules
  • Test with simple example

    • Linting Shows Too Many Errors

  • Some errors are style choices, not real issues
  • Consider disabling specific checks
  • Use custom rules for specific needs

    • Tips

    Best Results

  • Use consistent style guide
  • Enable fixLists, normalizeSpacing options
  • Set maxWidth appropriate for your output medium
  • Test on small samples first

    • Performance Optimization

  • Process large files in batches
  • Disable unused linting checks
  • Use simpler rules for common patterns

    • License

    MIT

    Format markdown. Keep your docs beautiful. šŸ”®

    āš” When to Use

    TriggerAction
    - Fix inconsistent formatting in README files
    - Normalize heading styles
    - Fix list markers
    - Clean up extra whitespace
    ### Content Creation
    - Format articles with consistent style
    - Beautify blog posts before publishing
    - Ensure consistent heading hierarchy
    ### Technical Writing
    - Format code documentation
    - Beautify API specs
    - Clean up messy markdown from LLMs
    ### README Generation
    - Format and beautify project README files
    - Ensure consistent structure
    - Professional appearance for open source
    ### Markdown Conversion
    - Convert HTML to markdown
    - Reformat from one style to another
    - Extract and format markdown from other formats

    šŸ’” Examples

    Simple Formatting

    const result = await formatMarkdown({
  markdown: '# My Title\n\n\nThis is content.',
  style: 'github'
});
    console.log(result.formattedMarkdown);

    Complex Beautification

    const result = await formatMarkdown({
  markdown: '# Header 1\n## Header 2\n\nParagraph...',
  style: 'github',
  options: {
    fixLists: true,
    normalizeSpacing: true,
    wrapWidth: 80
  }
});
    console.log(result.formattedMarkdown);

    Linting and Fixing

    const result = await lintMarkdown({
  markdown: '# Title\n\n- Item 1\n- Item 2\n\n## Section 2',
  style: 'github'
});
    console.log(Errors: ${result.errors.length});
result.errors.forEach(err => {
  console.log(  - ${err.message} at line ${err.line});
});
    // Fix automatically
const fixed = await formatMarkdown({
  markdown: result.fixed,
  style: 'github'
});

    Batch Processing

    const results = await formatBatch({
  markdownFiles: ['./doc1.md', './doc2.md', './README.md'],
  style: 'github'
});
    console.log(Processed ${results.totalFiles} files);
console.log(Total warnings: ${results.totalWarnings});

    āš™ļø Configuration

    Edit config.json:

    {
  "defaultStyle": "github",
  "maxWidth": 80,
  "headingStyle": "atx",
  "listStyle": "consistent",
  "codeStyle": "fenced",
  "emphasisStyle": "asterisk",
  "linkStyle": "inline",
  "customRules": [],
  "linting": {
    "checkLinks": true,
    "checkHeadingLevels": true,
    "checkListConsistency": true
  }
}

    šŸ“‹ Tips & Best Practices

    Best Results

  • Use consistent style guide
  • Enable fixLists, normalizeSpacing options
  • Set maxWidth appropriate for your output medium
  • Test on small samples first

    • Performance Optimization

  • Process large files in batches
  • Disable unused linting checks
  • Use simpler rules for common patterns