Book Metrics Generator

Overview

This skill automates the generation of comprehensive metrics for intelligent textbooks. It analyzes the entire textbook structure and content to produce two detailed reports:

1. book-metrics.md - Overall book statistics with links to relevant sections
2. chapter-metrics.md - Chapter-by-chapter breakdown in tabular format

The metrics provide quantitative insights into content volume, educational components, and interactive elements, helping authors track progress and identify areas needing attention.

Running the Shell Script Directly

Tell the user the following:

We setup this skill mostly to automate the process of installing the shell script. The shell script calls a Python program that does the work of building the metrics files. If you want to save a few tokens, after the skill is installed (a symbolic link really) you can run the following from your terminal:

~/.claude/skills/book-metrics-generator/scripts/book-metrics-generator.sh

Just make sure that you do a git pull on the claude-skills repo to get the latest version.

When to Use This Skill

Use this skill when:

• Tracking progress on intelligent textbook development
• Preparing status reports for stakeholders or collaborators
• Assessing content completeness before publication
• Analyzing the distribution of educational elements across chapters
• Estimating the physical page equivalent of the digital textbook
• Auditing content after major updates or additions
• Comparing metrics over time to track growth

The skill is designed for MkDocs Material-based intelligent textbooks following the structure defined in the intelligent-textbook skill.

Prerequisites

The intelligent textbook project should have:

• A docs/ directory containing the textbook content
• A docs/chapters/ directory with chapter subdirectories (e.g., 01-chapter-name/, 02-chapter-name/)
• Each chapter directory containing an index.md file
• A docs/learning-graph/ directory (will be created if it doesn't exist)

Optional components that enhance metrics:

• docs/learning-graph/learning-graph.csv - For concept counting
• docs/glossary.md - For glossary term counting
• docs/faq.md - For FAQ counting
• docs/sims/ - For MicroSim counting
• Chapter-level quiz.md files - For quiz question counting

Usage

Basic Workflow

To generate metrics for an intelligent textbook:

1. Navigate to the textbook project root directory
2. Execute the shell script:

./scripts/book-metrics-generator.sh

Or if the skill scripts are available:

bash /path/to/skill/scripts/book-metrics-generator.sh

3. Review the generated files:

   • docs/learning-graph/book-metrics.md
   • docs/learning-graph/chapter-metrics.md

4. Update mkdocs.yml navigation to include the new metrics files:

nav:
  - Learning Graph:
    - Book Metrics: learning-graph/book-metrics.md
    - Chapter Metrics: learning-graph/chapter-metrics.md

Custom Docs Directory

To analyze a textbook in a non-standard location:

./scripts/book-metrics-generator.sh path/to/custom/docs

Running the Python Script Directly

For more control or integration into custom workflows:

python3 scripts/book-metrics.py docs

Book Metrics Collected

The book-metrics.md file contains a four-column table with the following metrics:

Category	Metric	Description
Structure	Chapters	Count of chapter directories with index.md files
Learning	Concepts	Number of concepts in learning-graph.csv
Learning	Glossary Terms	Count of defined terms (H2/H3 headers in glossary.md)
Learning	FAQs	Number of FAQ items (H2 headers in faq.md)
Assessment	Quiz Questions	Total quiz questions across all chapters
Visual	Diagrams	Count of H4 headers starting with "#### Diagram:"
Technical	Equations	LaTeX expressions using $ and $$ delimiters
Interactive	MicroSims	Directories in docs/sims/ with index.md files
Content	Total Words	All words in markdown files (excluding code and URLs)
Content	Links	Markdown-formatted hyperlinks text
Estimation	Equivalent Pages	Calculated pages based on words + visuals

Page Calculation Formula

Equivalent pages are estimated using:

Pages = (Total Words ÷ 250) + (Diagrams × 0.25) + (MicroSims × 0.5)

Assumptions:

• 250 words per printed page
• Each diagram occupies 0.25 page
• Each MicroSim occupies 0.5 page

Chapter Metrics Collected

The chapter-metrics.md file contains a table with these columns:

Column	Description
Chapter	Chapter number (leading zeros removed)
Name	Chapter title extracted from index.md H1 header
Sections	Count of H2 and H3 headers in chapter markdown files
Diagrams	Count of "#### Diagram:" headers in chapter
Words	Total word count for all markdown in the chapter

This table enables quick identification of:

• Chapters with insufficient content
• Uneven content distribution
• Chapters lacking visual aids
• Outlier chapters requiring review

Technical Details

File Detection Patterns

The Python script uses these patterns to count elements:

• Chapters: Directories in docs/chapters/ containing index.md
• Concepts: Rows in docs/learning-graph/learning-graph.csv (excluding header)
• Glossary Terms: ^## and ^### patterns in glossary.md
• FAQs: ^## pattern in faq.md
• Quiz Questions: ^## pattern in all quiz.md files
• Diagrams: ^####\s+Diagram: pattern (multiline flag)
• Equations: \$[^$]+\$ (inline) and \$\$[^$]+\$\$ (display)
• MicroSims: Subdirectories in docs/sims/ with index.md
• Links: \[([^\]]+)\]\(([^)]+)\) pattern

Word Counting Methodology

To ensure accurate word counts, the script:

1. Removes code blocks (triple backticks)
2. Removes inline code (single backticks)
3. Removes URLs (http/https links)
4. Counts word boundaries using \b\w+\b pattern

Error Handling

The script gracefully handles:

• Missing directories (returns 0 for counts)
• Missing files (returns 0 for counts)
• Malformed CSV files (prints warning, returns 0)
• Encoding issues (UTF-8 with fallback)
• Permission errors (prints warning, continues)

Extending the Metrics

Adding New Book-Level Metrics

To add a new book-level metric:

1. Add a counting method to the BookMetricsGenerator class:

def count_new_metric(self) -> int:
    """Count the new metric.

    Returns:
        Number of items
    """
    # Implementation here
    pass

2. Update generate_book_metrics_md() to call the new method:

new_metric = self.count_new_metric()

3. Add a row to the markdown table:

md += f"| New Metric | {new_metric} | [Link](path) | Description |\n"

4. Add explanation in the "Metrics Explanation" section

Adding New Chapter-Level Metrics

To add a new chapter-level metric:

1. Update get_chapter_metrics() to compute the new metric:

def get_chapter_metrics(self, chapter: Dict[str, Any]) -> Dict[str, Any]:
    # Existing code...

    # Add new metric
    new_metric = self.count_new_metric_for_chapter(chapter)

    return {
        # Existing fields...
        'new_metric': new_metric
    }

2. Update generate_chapter_metrics_md() to include the new column:

md += "| Chapter | Name | ... | New Metric |\n"
# In the row loop:
md += f"| {metrics['number']} | ... | {metrics['new_metric']} |\n"

3. Add explanation in the "Metrics Explanation" section

Integration with Workflows

After Content Generation

Run metrics generation after completing chapters:

# Generate chapter content
/skill intelligent-textbook

# Generate metrics
/skill book-metrics-generator

# Review progress
cat docs/learning-graph/book-metrics.md

Continuous Integration

Add to .github/workflows/metrics.yml:

name: Generate Metrics

on:
  push:
    paths:
      - 'docs/**/*.md'

jobs:
  metrics:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Generate metrics
        run: python3 scripts/book-metrics.py docs
      - name: Commit metrics
        run: |
          git config user.name "GitHub Actions"
          git add docs/learning-graph/book-metrics.md
          git add docs/learning-graph/chapter-metrics.md
          git commit -m "Update metrics" || exit 0
          git push

Pre-Deployment Checklist

Before deploying the textbook:

1. Run metrics generation
2. Verify all chapters have reasonable word counts (>1000 words)
3. Check that quiz questions exist for most chapters
4. Ensure MicroSims cover key concepts
5. Review total page count for scope appropriateness

Troubleshooting

No Chapters Found

Symptom: "No chapters found" in chapter-metrics.md

Solution: Ensure chapter directories:

• Are located in docs/chapters/
• Contain an index.md file
• Follow naming pattern: NN-chapter-name/ (where NN is a number)

Concept Count is Zero

Symptom: Concepts metric shows 0

Solution: Verify that:

• docs/learning-graph/learning-graph.csv exists
• CSV file has correct format (header row + data rows)
• CSV file is UTF-8 encoded

Missing Metrics Files

Symptom: Metrics files not created

Solution: Check that:

• docs/learning-graph/ directory exists (script creates it if missing)
• User has write permissions to the directory
• Python 3 is installed and accessible via python3 command

Incorrect Word Counts

Symptom: Word counts seem too high or too low

Solution: The script excludes code blocks and URLs. To verify:

• Check for large code blocks that should be excluded
• Review markdown files for formatting issues
• Ensure no binary or non-text files with .md extension

Resources

scripts/

This skill includes two executable scripts:

book-metrics-generator.sh

Bash wrapper script that:

• Validates the docs directory exists
• Checks for Python 3 installation
• Executes the Python metrics generator
• Provides user-friendly output

Default usage assumes docs/ directory in current working directory.

book-metrics.py

Python 3 script that:

• Implements modular BookMetricsGenerator class
• Provides separate methods for each metric type
• Generates markdown-formatted output
• Handles errors gracefully with warnings
• Supports custom docs directory path

The Python script is designed for extensibility - new metrics can be added by implementing new counting methods and updating the markdown generation functions.

Example Output

Book Metrics Table Sample

| Metric Name | Value | Link | Notes |
|-------------|-------|------|-------|
| Chapters | 12 | [Chapters](../chapters/) | Number of chapter directories |
| Concepts | 200 | [Learning Graph](learning-graph.csv) | Concepts from learning graph |
| Total Words | 45,000 | - | Words in all markdown files |
| Equivalent Pages | 195 | - | Estimated pages (250 words/page + visuals) |

Chapter Metrics Table Sample

| Chapter | Name | Sections | Diagrams | Words |
|---------|------|----------|----------|-------|
| 1 | Introduction to Geometry | 8 | 3 | 3,200 |
| 2 | Points and Lines | 12 | 7 | 4,100 |
| 3 | Angles and Triangles | 15 | 12 | 5,500 |

Related Skills

• intelligent-textbook - Complete textbook generation workflow (runs before metrics)
• learning-graph-generator - Creates the concept graph (provides concept count)
• glossary-generator - Generates glossary (provides glossary term count)
• faq-generator - Creates FAQ section (provides FAQ count)
• quiz-generator - Generates quizzes (provides quiz question count)
• chapter-content-generator - Creates chapter content (provides word count)