---
name: install-learning-graph-viewer
description: This skill installs an interactive learning graph viewer application into an intelligent textbook project. Use this skill when working with a textbook that has a learning-graph.json file and needs a visual, interactive graph exploration tool with search, filtering, and statistics capabilities.
---

# Install Learning Graph Viewer

## Overview

This skill installs a complete interactive graph visualization application into the `/docs/sims/graph-viewer/` directory of an intelligent textbook project. The viewer provides an interactive way to explore learning graphs with features like node search, category filtering, and real-time statistics.

## When to Use This Skill

Use this skill when:
- A learning graph has been generated (learning-graph.json exists in /docs/learning-graph/)
- The textbook needs an interactive visualization tool for exploring concept dependencies
- Students or instructors need to filter, search, and analyze the learning graph structure

**Prerequisites:**
- `/docs/learning-graph/learning-graph.json` must exist
- The JSON file must have metadata with a `title` field
- MkDocs project structure must be in place

## Installation Workflow

### Step 1: Verify Prerequisites

Before installation, verify that the learning graph JSON file exists:

```bash
ls /docs/learning-graph/learning-graph.json
```

If the file doesn't exist, use the `learning-graph-generator` skill first to create the learning graph.

### Step 2: Create Directory Structure

Create the graph-viewer directory:

```bash
mkdir -p /docs/sims/graph-viewer
```

### Step 3: Install Viewer Files

Copy the four essential files from the skill's assets directory to the target location:

```bash
cp assets/main.html /docs/sims/graph-viewer/main.html
cp assets/script.js /docs/sims/graph-viewer/script.js
cp assets/local.css /docs/sims/graph-viewer/local.css
cp assets/index.md /docs/sims/graph-viewer/index.md
```

### Step 4: Extract Title from Learning Graph JSON

Read the title from the learning graph metadata:

```bash
# Use Python or jq to extract the title
python3 -c "import json; data = json.load(open('/docs/learning-graph/learning-graph.json')); print(data.get('metadata', {}).get('title', 'Learning Graph'))"
```

If the metadata or title field doesn't exist, use a default title like "Learning Graph" or the course name.

### Step 5: Update Title in main.html

Replace the "TITLE" placeholder in main.html with the extracted title:

1. Read the extracted title from Step 4
2. In `/docs/sims/graph-viewer/main.html`, replace all instances of "TITLE" with the actual course title
3. This appears in two locations:
   - The `<title>` tag: `<title>Learning Graph Viewer for TITLE</title>`
   - The page heading: `<h4>Learning Graph for TITLE</h4>`

### Step 6: Update MkDocs Navigation (Optional)

If the user wants the graph viewer in the site navigation, add it to `mkdocs.yml`:

```yaml
nav:
  - MicroSims:
    - List of MicroSims: sims/index.md
    - Graph Viewer: sims/graph-viewer/index.md
```

### Step 7: Inform the User

Provide the user with instructions to test the installation:

1. Run `mkdocs serve` to start the local development server
2. Navigate to the appropriate URL based on their repository name:
   - Format: `http://localhost:8000/REPO_NAME/sims/graph-viewer/main.html`
   - The REPO_NAME can be extracted from the git repository or inferred from the project structure
3. Alternatively, if added to navigation, they can access it through the MkDocs site menu

## Viewer Features

The installed graph viewer provides:

**Search Functionality:**
- Type-ahead search with dropdown results
- Shows category information for each node
- Focuses and selects matching nodes in the visualization

**Category Filtering:**
- Sidebar legend with color-coded categories
- Checkboxes to show/hide specific taxonomy groups
- "Check All" and "Uncheck All" bulk operations
- Collapsible sidebar for expanded viewing

**Real-time Statistics:**
- Visible node count
- Visible edge count
- Orphaned node count (concepts with no dependencies)

**Interactive Visualization:**
- vis.js network graph with physics simulation
- Color-coded nodes by taxonomy category
- Directed edges showing concept dependencies
- Zoomable and draggable interface

## Technical Details

**File Structure:**
```
/docs/sims/graph-viewer/
├── main.html      # Main application HTML
├── script.js      # JavaScript logic for visualization
├── local.css      # Styling for the viewer
└── index.md       # Documentation page with iframe embed
```

**Dependencies:**
- vis-network.js (loaded from CDN in main.html)
- learning-graph.json (loaded from ../../learning-graph/learning-graph.json)

**Data Path:**
The script.js file loads the learning graph from a relative path: `../../learning-graph/learning-graph.json`. This assumes the standard intelligent textbook structure where `/docs/sims/` and `/docs/learning-graph/` are siblings.

## Resources

### assets/

This skill includes four asset files that get copied to the target directory:

- **main.html** - The main viewer application HTML file with vis-network integration
- **script.js** - Interactive JavaScript for search, filtering, and visualization
- **local.css** - Stylesheet for the viewer interface
- **index.md** - Documentation page explaining the viewer features

These files are templates from the learning-graphs repository and are ready to use without modification (except for the TITLE placeholder in main.html).