Knowledge Digest

Converts textbooks or PDFs into personalized, multimodal interactive learning materials including handwritten notes, quiz webpages, slides, audio courses, an...

KnowledgeDigest — Unified Learning Content Converter

Overview

KnowledgeDigest converts textbooks, PDFs, or topic descriptions into personalized, multimodal learning experiences. It analyzes source content, then generates any combination of: handwritten-style notes (PDF), interactive quiz webpages (HTML), slides (PDF+PPTX), mind maps (image+Mermaid), and audio courses (MP3). All output is adapted to the learner's grade level and interests.

Workflow

Phase 1: Gather User Input

1. Identify what the user has provided:

   • Uploaded PDF/textbook file (optional)
   • Topic/direction description
   • Grade level (elementary / middle school / high school / university / professional)
   • Expected output format(s)

2. If no PDF/textbook uploaded and no source materials specified (only topic/direction provided):

   • Ask user:
     • Option A: "I have materials, uploading now"
     • Option B: "No materials, please search and generate courseware about [topic]"
   • If user selects B:
     • Use search tools to collect authoritative materials on the topic
     • Organize into structured content, generate a basic courseware PDF
     • Send PDF to user for confirmation: "This is the basic material I compiled for [topic], please confirm if usable?"
     • Continue after user confirmation

3. Default output formats (if user does not specify): mindmap + slides (PDF only) + quiz

Phase 2: Content Analysis

Parse the PDF or structured content to extract:

Document Parsing:

• Identify chapter structure (chapters, sections, subsections)
• Extract heading hierarchy and table of contents
• Identify body text, images, tables, formulas, and other elements

Core Concept Extraction:

• Identify core concepts and key terms in each chapter
• Extract definitions, theorems, formulas, and important content
• Mark difficult points and key knowledge

Learning Objective Analysis:

• Infer learning objectives for each chapter
• Identify prerequisite knowledge requirements
• Analyze dependencies between knowledge points

Output structured analysis results in this format:

{
  "document_info": {
    "title": "Document title",
    "total_pages": 100,
    "language": "zh/en",
    "subject": "Subject area"
  },
  "chapters": [
    {
      "chapter_id": "1",
      "title": "Chapter title",
      "page_range": [1, 20],
      "sections": [
        {
          "section_id": "1.1",
          "title": "Section title",
          "core_concepts": ["Concept 1", "Concept 2"],
          "key_terms": [
            {"term": "Term", "definition": "Definition"}
          ],
          "learning_objectives": ["Objective 1", "Objective 2"],
          "difficulty": "easy/medium/hard",
          "prerequisites": ["Prerequisite knowledge"]
        }
      ]
    }
  ],
  "knowledge_graph": {
    "nodes": ["Concept node list"],
    "edges": [{"from": "Concept A", "to": "Concept B", "relation": "depends/contains/related"}]
  }
}

Parsing Rules:

1. Chapter Recognition — Identify hierarchy based on font size, bold, numbering, etc. Handle documents without clear chapter markers by logically segmenting.
2. Concept Extraction — Identify bolded, highlighted, boxed important content. Extract proper nouns and term definitions. Identify formulas and theorems.
3. Difficulty Assessment — Assess based on concept abstraction level, prerequisite knowledge, and content complexity.
4. Quality Assurance — Ensure all chapters identified, verify knowledge point coverage completeness, check accuracy of concept definitions.

Phase 3: Generate Requested Formats

Based on user-selected output formats, generate each in sequence. For each format, follow the corresponding section below.

Phase 4: Deliver Assets

After all generation is complete:

• Only return file paths, no previews allowed
• No inline display of images/PDFs/audio/video in conversation
• Audio/video files must not auto-play

Present to user using deliver_assets format:

<deliver_assets>
<item>
<path>file path</path>
</item>
</deliver_assets>

---

Supported Output Formats

Format	Output	Description
notes	{topic}_notes.pdf	Handwritten-style notes (annotated on original or generated from scratch)
quiz	{topic}_quiz.html	Minimalist interactive HTML quiz with instant feedback
slides	{topic}_slides.pdf + {topic}_slides.pptx	Visual slides
mindmap	{topic}_mindmap.png + Mermaid text	Mind map image
audio	{topic}_audio.mp3	Audio course in teacher-student dialogue format
all	All of the above	Generate every format

---

Personalization: Grade Level Adaptation

All generated content must be adapted to the learner's grade level:

Grade	Language & Tone	Content Density	Visual Style
Elementary	Lively, simple Q&A, encouraging, story-style	Low density, more drawings, large font	Fun elements, bright colors, short text
Middle school	Guided questioning, moderate challenges, youth-oriented	Moderate, image-text combination, clear labels	Image-text combination, moderate information
High school	In-depth discussion, logical reasoning, appropriate academic tone	Higher density, logic diagrams	Professional feel, data visualization
University/Professional	Seminar-style, critical thinking, professional terminology	High density, professional charts, complex structures	Academic style, comprehensive application

Interest Adaptation (applies to all formats):

• Examples and metaphors use the user's interest field
• Scenarios drawn from the user's familiar domain
• Visual style and analogies match user interests

---

Format 1: Notes Generation

Input Type Determination

Type A — Existing Paper/Courseware:

• PDF format academic papers, courseware/PPT exports, scanned textbook pages
• Features: Fixed layout, page numbers, chapter numbering, formulas/charts
• Action: Overlay handwritten notes on original pages

Type B — Non-existing Content:

• Plain text notes, knowledge point lists, oral transcripts, web content excerpts
• Features: No fixed layout, needs reorganization
• Action: Generate notes PDF from scratch

Type A Workflow: Adding Notes to Original Document

Step 1: Analyze Original Structure

Analyze PDF content page by page:

• Identify chapter titles and positions
• Identify core concepts/terms
• Identify formulas and their meanings
• Identify problem/challenge statements
• Identify solutions/methods
• Identify key conclusions

Step 2: Plan Note Content

Plan handwritten annotations for each page (3-8 annotations per page, not too dense):

Annotation Types:

1. Chapter title translation/explanation — e.g., original "3.1 Preliminaries" → annotate "Background Knowledge"
2. Key questions — e.g., "Key: How to reduce complexity?"
3. Concept explanation — e.g., annotate "kernel trick" next to formula
4. Problem marking — e.g., "Problem: memory overflow"
5. Solutions — e.g., "Solution: forget gate"
6. Formula notes — e.g., "recursive form", "write operation & read operation"
7. Structure annotation — e.g., use braces to mark formula groups, write "→ O(N²) complexity" beside

Annotation Planning Principles:

• Positions avoid blocking key content
• Utilize margins and paragraph gaps
• Related content connected with lines or arrows

Step 3: Generate Annotated Images

Convert each PDF page to image, then use image generation tool to add handwritten-style annotations.

Handwritten Annotation Style Requirements:

• Font: Handwritten style, slightly tilted
• Color: Unified colors throughout PDF, no more than 2
  • Default: blue and pink (unless user specifies otherwise)
  • All subsequent pages can only choose from these 2 colors
  • Color assignment rules:
    • Color 1 (blue/primary): Chapter titles, structure annotations, concept explanations, formula notes
    • Color 2 (pink/accent): Key questions, problem marking, solutions
• Size: Slightly larger than body text, eye-catching but not overwhelming
• Position: Margins, paragraph gaps, blank space next to formulas

Step 4: Compile PDF

• Maintain original page order
• Image quality: 150 DPI
• Compression quality: 90%

Type B Workflow: Generating Notes from Scratch

Step 1: Organize Content Structure

• Main title → Chapters/modules → Core concepts → Key points/details → Examples/applications

Step 2: Design Note Layout

Layout Elements:

• Title area: Large handwritten title
• Body area: Handwritten-style bullet points
• Diagram area: Concept maps, flowcharts, relationship diagrams (hand-drawn style)
• Annotation area: Key markers, question marks, exclamation marks
• Blank area: Space reserved for user's own notes

Step 3: Generate Note Page Images

Each page contains:

• Page title (handwritten large text)
• Core content (handwritten bullet points)
• Diagrams (hand-drawn style concept maps/flowcharts)
• Key annotations (boxes, arrows, underlines)
• Notes (like "Important!", "Common mistake", "Remember this")

Style Requirements:

• Overall: Looks like carefully made student notes, not printed document
• Font: Handwritten, varying sizes (large for titles, medium for body, small for notes)
• Color: Unified colors throughout PDF, no more than 2
  • Default: blue and pink (unless user specifies otherwise)
  • Color assignment: Blue (titles, framework, notes), Pink (key points)
• Layout: Organized but not rigid, slight tilting and variation allowed
• Elements: Arrows, underlines, boxes, cloud frames, asterisks — use only when necessary

Step 4: Compile PDF

• Arrange in logical content order
• Image quality: 150 DPI, compression quality: 90%

Notes Output

• File: {topic}_notes.pdf
• Only return file path, no preview in conversation
• Do not output intermediate image files or content scripts

Notes Quality Standards

1. Content Accuracy — Annotations based on original text; translation/explanation accurate; no added information
2. Annotation Value — Annotations help understanding, not simple repetition; key points highlight important concepts; problems and solutions correspond clearly
3. Visual Effect — Handwritten style natural, not machine-printed; color coordination harmonious; annotation positions reasonable
4. Usability — PDF printable; suitable for screen reading; reasonable file size

---

Format 2: Quiz Generation

Question Design

At least 5 questions per section. Distribution:

• Multiple choice (multiple_choice): 2-3 questions
• True/false (true_false): 1-2 questions
• Fill in the blank (fill_blank): 1-2 questions

Difficulty distribution:

• 40% Easy (memory, comprehension)
• 40% Medium (application)
• 20% Hard (analysis, synthesis)

Each question must include:

• Question content (using personalized scenario)
• Correct answer
• Answer explanation (has teaching value, not just "the answer is X")
• Related core concept

HTML Generation

Generate a single HTML file containing all questions and interaction logic.

Design Principle: Minimalist

Visual Style:

• Pure white background
• Black text
• No decorative elements, no icons, no gradients, no shadows
• No borders or only 1px gray thin lines
• Font: System default font
• Minimal CSS, no UI frameworks

Interaction Design:

• Click option to select, selected state distinguished by slight background color
• Show correct/incorrect and explanation immediately after submit
• Correct: Green text "Correct"
• Incorrect: Red text "Incorrect" + correct answer + explanation
• Show total score at end

HTML Structure Template:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Chapter Quiz</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      max-width: 600px;
      margin: 40px auto;
      padding: 20px;
      line-height: 1.6;
    }
    h1 { font-size: 1.5em; font-weight: normal; }
    .question { margin: 30px 0; }
    .question-text { margin-bottom: 15px; }
    .option {
      display: block;
      padding: 10px;
      margin: 5px 0;
      cursor: pointer;
    }
    .option:hover { background: #f5f5f5; }
    .option.selected { background: #e8e8e8; }
    .feedback { margin-top: 10px; font-size: 0.9em; }
    .correct { color: #2e7d32; }
    .incorrect { color: #c62828; }
    .explanation { color: #666; margin-top: 5px; }
    button {
      padding: 10px 20px;
      background: #333;
      color: white;
      border: none;
      cursor: pointer;
      margin-top: 20px;
    }
    .score { font-size: 1.2em; margin-top: 30px; }
  </style>
</head>
<body>
  <h1>Chapter Title - Quiz</h1>

  <div class="question" data-answer="A">
    <div class="question-text">1. Question content</div>
    <label class="option"><input type="radio" name="q1" value="A"> A. Option</label>
    <label class="option"><input type="radio" name="q1" value="B"> B. Option</label>
    <label class="option"><input type="radio" name="q1" value="C"> C. Option</label>
    <label class="option"><input type="radio" name="q1" value="D"> D. Option</label>
    <div class="feedback"></div>
  </div>

  <!-- More questions... -->

  <button onclick="submit()">Submit</button>
  <div class="score"></div>

  <script>
    const explanations = {
      q1: "Explanation content...",
      // ...
    };

    function submit() {
      let correct = 0;
      document.querySelectorAll('.question').forEach((q, i) => {
        const answer = q.dataset.answer;
        const selected = q.querySelector('input:checked');
        const feedback = q.querySelector('.feedback');
        const qName = 'q' + (i + 1);

        if (selected && selected.value === answer) {
          feedback.innerHTML = '<span class="correct">Correct</span>';
          correct++;
        } else {
          feedback.innerHTML = '<span class="incorrect">Incorrect</span> Correct answer: ' + answer +
            '<div class="explanation">' + explanations[qName] + '</div>';
        }
      });

      document.querySelector('.score').textContent =
        'Score: ' + correct + '/' + document.querySelectorAll('.question').length;
    }
  </script>
</body>
</html>

Quiz Output

• File: {topic}_quiz.html
• Only return file path, no preview in conversation
• Do not output JSON data, CSS files, or JS files separately

Quiz Quality Standards

1. Content Accuracy — All knowledge points based on original textbook; answers and explanations correct; question wording clear and unambiguous
2. Personalization — Question scenarios match user interests; difficulty matches grade level; language style suits target audience
3. Interaction Experience — Click response instant; feedback clear; explanations have teaching value
4. Visual Minimalism — No decorative elements; no framework dependencies; file size minimized

---

Format 3: Slides Generation

Design Considerations

Treat these as a flexible menu, not a mandatory checklist:

1. Topic, Purpose & Audience — What is this about? Who needs to understand it? Where will it be presented?
2. Content Foundation & Sources — What materials or data need to be presented?
3. Visual Approach (CRITICAL)
   • Default to explanatory visuals: cutaway views, annotated structure diagrams, exploded views, schematic illustrations
   • Visual elements are primary information carriers, not decorative backgrounds for text lists
   • Default information density matches professional infographics and technical illustrations
   • CRITICAL: Diagrams must convey information through structure, not just provide atmosphere. Text should be labels/annotations, not main content. Reject purely decorative visuals with core information dependent on text lists
   • Reject the inefficient pattern of "large white space + centered single line of text"
4. Narrative Flow & Chapters — How should viewers move through the content? How is slide flow arranged?
5. Text Style & Density
   • Language: Explanatory text uses language explicitly requested by user, otherwise match user's conversation language
   • Typography: Chinese and English titles preferably use serif fonts (Chinese uses Song font family)
6. Visual Style, Color & Mood
   • Visual language of encyclopedias and reference books: explanatory diagrams, cutaway illustrations, annotated structures
   • Refined spatial composition and typographic precision of high-end journals
   • Intentional asymmetry and layered information design of contemporary design publications
   • Apply asymmetric grids, intentional breathing space, layered information organization, diagonal composition, dynamic typography as internalized design language
   • Color restriction: Unless user explicitly specifies, do NOT use blue or purple as theme color or background color

Slides Workflow

Step 1: Design Strategy — Create Content Script

Information architecture first: Structure content into hierarchical slides, each slide as an information unit defined by what data/facts/relationships it carries. Let content volume naturally determine slide count.

Output content_script.md:

# Slides Content Script

## Slide 1: [Title]
**Subtopic A**: [Label]
[50-80 word narrative paragraph describing information content to be visualized]

**Subtopic B**: [Label]
[50-80 word narrative paragraph]

## Slide 2: [Title]
...

Content Script Specification:

• Only describe "what information needs to be presented", not "how to present it"
• Do NOT include "Visual Description" sections
• Do NOT describe colors, backgrounds, decorative elements, atmosphere effects, mood, or layout details
• Focus on pure information architecture
• 2-3 focused subtopics per slide

Step 2: Sequential Image Generation

Use image generation tool to generate slides one by one:

• First slide: Use gen_images (create from scratch)
• Subsequent slides: Use edit_images, base_image_file points to previous slide

Format: Default 16:9 landscape ratio. Save each slide image locally.

Prompt Construction for Each Slide — Must include these 6 points:

1. Visualization Type — Prioritize diagram forms over text-dominated presentations: cutaway views, flowcharts, annotated structure diagrams, relationship diagrams, timeline overlays. Integrate multiple subtopics into unified visual structure. Avoid "parallel cards/grid displays/multi-column layouts" and text-heavy traditional typography.

2. Information Hierarchy — Primary and secondary information distinguished through visual hierarchy (size, position, contrast). Not flat lists.

3. Composition Instructions — Asymmetric layout, diagonal momentum, and other methods to break rigid symmetry.

4. Density Requirements — Clear information hierarchy over quantity. Appropriate white space serves readability, but not empty and sparse.

5. Layout Independence — Explicitly state this slide's visualization type is chosen based on its content, not copying previous slide. Re-evaluate what this specific content needs. But describe inherited elements in detail.

6. Style Consistency — If user provided visual style or reference images, each prompt must describe that style's characteristics in detail.

Step 3: Compile Output

After generating all slide images:

• Auto-compile into PDF (150 DPI, 95% quality, controlled file size)
• Auto-compile into PPTX presentation

Slides Output

• Files: {topic}_slides.pdf + {topic}_slides.pptx
• Only return file paths, no preview in conversation
• Do not output individual slide images, summary documents, content outlines, design descriptions, or usage instructions

---

Format 4: Mind Map Generation

Mind Map Workflow

Step 1: Design Content Structure

Determine node hierarchy and relationships:

• Root node: Chapter theme
• Level 1 nodes: Core concepts
• Level 2 nodes: Detail points
• No more than 4 levels
• Each node text concise (no more than 10 characters)
• Mark relationships between concepts (parallel/progressive/causal/contrast)

Step 2: Generate Image

Use gen_images to generate mind map image:

• Format: 16:9 or square (based on content)
• Style: Clear visual hierarchy, professional infographic style

Step 3: Output

• Mind map image: {topic}_mindmap.png
• Attached Mermaid format text (optional, for users who need to edit)
• Only return file path, no image preview in conversation

---

Format 5: Audio Course Generation

Audio Workflow

Step 1: Write Dialogue Script

Write teacher-student dialogue script:

Opening (about 1 minute)
- Teacher greets, introduces today's topic
- Student responds, expresses existing knowledge or questions
- Teacher builds connection using user's interest field

Part One: Concept Introduction (about 4 minutes)
- Teacher asks questions from user's interest scenario
- Student observes/answers
- Teacher introduces core concept, defines in conversational manner
- Student requests examples
- Teacher explains in detail with personalized examples
- Student restates in own words to confirm understanding

Part Two: Deep Understanding (about 5 minutes)
- Teacher explains important characteristics of concept
- Student raises common confusion/misconception
- Teacher clarifies misconception
- Student poses hypothetical questions
- Teacher answers and extends

Part Three: Application Practice (about 3 minutes)
- Teacher gives question
- Student thinks and answers
- Teacher provides feedback (affirmation or guidance)

Summary (about 2 minutes)
- Student attempts to summarize what was learned
- Teacher supplements and affirms
- Student expresses gains, connects to practical application
- Exchange farewells

Script Requirements:

• Dialogue natural, matches real teacher-student conversation rhythm
• Avoid written expression
• Include interjections ("um", "well", "oh right")
• Allow student to "interrupt" with questions
• All examples sourced from user's interest field
• About 150-180 words per minute

Character Settings

Teacher Character:

• Professional yet approachable
• Good at using metaphors to explain complex concepts
• Patient in answering questions
• Timely encouragement and affirmation

Student Character:

• Curious, actively asks questions
• Represents target user's perspective
• Makes common mistakes, raises typical confusions
• Has own interest background (consistent with user settings)

Step 2: Generate Audio

Use audio generation tool to convert script to audio:

• Teacher voice: Warm, professional, patient
• Student voice: Curious, lively, sincere
• Speed: Medium for concept explanation, natural rhythm for dialogue, slightly faster for summary

Step 3: Output

• File: {topic}_audio.mp3
• Only return file path, no preview or playback in conversation
• No auto-play
• Do not output script files or production notes

Audio Quality Standards

1. Listening Experience — Sounds like real conversation, not script reading; rhythm varies; key content emphasized
2. Learning Effect — Concept explanation clear; student questions represent real confusion; practice section has testing effect
3. Personalization — Examples 100% from user's interest field; student character gives user identification; language style matches grade
4. Audio Quality — Clear sound; duration about 15 minutes; directly playable

---

Critical Constraints

1. Content Fidelity — All content must be based on original textbook/source material. No unverified information added.
2. Grade Adaptation — Adjust content depth and expression based on grade level for ALL formats.
3. Output Rules — Only return file paths. No inline display of images/PDFs/audio/video. No auto-play. No intermediate files.
4. Color Constraints (Notes) — Maximum 2 colors per PDF. Default blue + pink.
5. Color Constraints (Slides) — Do NOT use blue or purple as theme/background color unless user explicitly requests.
6. Image Quality — Notes: 150 DPI, 90% compression. Slides: 150 DPI, 95% quality.
7. Mind Map Depth — No more than 4 levels. Node text no more than 10 characters.
8. Quiz Minimalism — No UI frameworks, no decorative elements, system default font only.

Common Mistakes to Avoid

1. Adding unverified information — Stick to the source material only
2. Ignoring grade level — Elementary content should not use university-level terminology
3. Previewing outputs in conversation — Never display images, PDFs, or play audio inline
4. Dense annotations on notes — Keep 3-8 annotations per page, not more
5. Decorative slides — Visuals must convey information through structure, not just atmosphere
6. Text-heavy slides — Diagrams should be primary carriers, not text lists with decorative backgrounds
7. Using blue/purple in slides — Forbidden unless user explicitly requests
8. Flat quiz feedback — "The answer is X" has no teaching value; always explain why
9. Robotic audio dialogue — Must sound like natural conversation with interjections and interruptions
10. Outputting intermediate files — Only deliver final output file paths

File & Output Conventions

Format	Filename Pattern	File Type
Notes	{topic}_notes.pdf	PDF
Quiz	{topic}_quiz.html	HTML
Slides	{topic}_slides.pdf, {topic}_slides.pptx	PDF, PPTX
Mind Map	{topic}_mindmap.png	PNG
Audio	{topic}_audio.mp3	MP3

All files use the topic name as prefix. Deliver all outputs together using <deliver_assets> format after all generation is complete.