Marp Slide Quality Analyzer

This Skill uses SlideGauge to analyze Marp markdown presentations and help you create high-quality slides that follow best practices.

When to use this Skill

• User is working on a Marp presentation (.md file with marp: true frontmatter)
• User asks to check, analyze, validate, or improve slide quality
• User mentions SlideGauge or slide quality issues
• User wants to fix specific slide problems (too many bullets, long content, etc.)

Instructions

1. Initial Analysis

When user asks to analyze their slides:

# Run SlideGauge with text output for quick overview
uvx --from git+https://github.com/nibzard/slidegauge slidegauge <path-to-presentation.md> --text

Explain the results:

• Overall score and passing rate
• Number of issues found
• Category breakdown (a11y, code, color, content, layout)

2. Detailed Analysis

For slides that need fixing (score < 80):

# Get JSON output with detailed diagnostics
uvx --from git+https://github.com/nibzard/slidegauge slidegauge <path-to-presentation.md> --json | jq '.slides[] | select(.score < 80)'

For each failing slide, identify:

• Exact slide number and title
• Specific issues with deduction amounts
• Actionable recommendations

3. Fix Common Issues

Use the Edit tool to fix issues. See FIXES.md for specific fix patterns.

Common fixes:

• Too many bullets: Split into multiple slides or consolidate
• Content too long: Trim text or split slide
• Code too long: Simplify examples or split
• Too many lines: Reduce content density
• Title too long: Shorten to ≤35 characters

4. Validate Fixes

After making changes, re-run SlideGauge:

uvx --from git+https://github.com/nibzard/slidegauge slidegauge <path-to-presentation.md> --text

Compare before/after scores and confirm improvements.

Workflow

1. Analyze: Run SlideGauge to get baseline scores
2. Prioritize: Focus on slides scoring < 70 first, then < 80
3. Fix: Apply fixes from FIXES.md based on diagnostics
4. Validate: Re-run to confirm improvements
5. Iterate: Repeat until all slides pass (≥70) or user is satisfied

Key Thresholds

• 70: Minimum passing score (slides below this MUST be fixed)
• 80: Good quality (recommend fixing these)
• 90+: Excellent quality
• 100: Perfect score

Category Scores

• a11y: Accessibility (alt text, contrast)
• code: Code block length and complexity
• color: Color usage and contrast ratios
• content: Text length, bullets, line count
• layout: Overall slide structure

Best Practices

1. Always show user the results - don't just fix silently
2. Explain WHY each fix improves the slide
3. Get user approval before making major changes (splitting slides, removing content)
4. Preserve user intent - don't change technical content
5. Re-validate after fixes to show improvement

Examples

See EXAMPLES.md for detailed examples of:

• Analyzing a full presentation
• Fixing specific slide issues
• Splitting overloaded slides
• Optimizing code examples

Reference

See REFERENCE.md for complete SlideGauge rule documentation.

Dependencies

SlideGauge is installed via uvx on-demand:

uvx --from git+https://github.com/nibzard/slidegauge slidegauge --help

No manual installation required - uvx handles it automatically.