Summarization

Purpose

Create effective summaries by matching summarization type to purpose, audience, and context. "Summarize" can mean many different things—this skill helps identify and execute the right approach.

Core Principle

Summarization is translation, not just reduction. Different purposes require different summary types. Clarify the need before condensing.

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Clarifying Questions

Before summarizing, consider:

1. Purpose: What will this summary be used for?

   • Decision-making
   • Background information
   • Further research
   • Quick understanding
   • Reference/recall

2. Audience: Who will read it?

   • Technical experts
   • General audience
   • Decision makers
   • Familiar/unfamiliar with topic

3. Scope: How comprehensive?

   • Ultra-brief (single sentence)
   • Brief (paragraph)
   • Moderate (page)
   • Extended (multiple pages)

4. Emphasis: What aspects are most important?

   • Methodology
   • Findings/results
   • Arguments/claims
   • Context/background
   • Implications/applications

5. Format: What structure?

   • Narrative text
   • Bullet points
   • Hierarchical outline
   • Visual representation

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Summary Type Taxonomy

Information Reduction Approaches

Type	What It Is	When to Use
Key Point Extraction	Isolating the most important claims	Original has discrete important points
Abstraction	Higher-level statements covering multiple details	Patterns matter more than specifics
Gisting	Capturing essential meaning, discarding details	Only core message matters
Compression	Shortening while preserving information	Comprehensive coverage needed in less space

Structural Approaches

Type	What It Is	When to Use
Executive Summary	Business-focused: decisions, recommendations, outcomes	Documents requiring action
Abstract/Précis	Academic: methodology and findings	Research papers, technical documents
TLDR	Ultra-brief main takeaway	Casual communication, extreme brevity
Outline	Hierarchical structure of main/supporting points	Logical structure matters

Purpose-Oriented Approaches

Type	What It Is	When to Use
Synthesis	Combining multiple sources coherently	Summarizing across documents
Critical Summary	Evaluating claims while condensing	Assessment of quality needed
Contextual Summary	Framing within broader knowledge	Understanding bigger picture matters
Actionable Summary	Focusing on implications and next steps	Summary will drive action

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Execution by Type

Key Point Extraction

1. Scan for topic sentences and conclusions
2. Identify explicitly stated main ideas
3. List each distinct point
4. Preserve original phrasing where powerful

Example: "The author makes three main arguments: (1)..., (2)..., (3)..."

Abstraction

1. Group related details
2. Find common themes or patterns
3. Create higher-level statements
4. Reduce specifics to principles

Example: "Multiple studies consistently show..." instead of listing 12 studies

Gisting

1. Ask: "What is the one thing to remember?"
2. Distill to core insight
3. Remove all supporting detail
4. Verify essence is preserved

Example: "Remote work increases productivity for most knowledge workers."

Executive Summary

1. State the problem/opportunity
2. Present the solution/recommendation
3. Highlight key benefits
4. Note costs/risks
5. Specify required actions

Synthesis

1. Read all sources
2. Identify common themes
3. Note contradictions
4. Find complementary information
5. Create unified narrative

Example: "Across the five reports, three key trends emerge..."

Critical Summary

1. Summarize the claims
2. Evaluate the evidence
3. Assess methodology
4. Note limitations
5. Conclude with assessment

Example: "While the author claims X, the evidence is limited by..."

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Format Variations

Quotation-Based

• Use key phrases verbatim
• When precise wording is important
• Select and organize most important quotes

Bullet Points

• Break continuous text into discrete units
• When quick scanning is valued
• Make each point standalone

Progressive Summary

• Start ultra-brief
• Add layers of detail
• Let reader choose depth

Comparative Summary

• Side-by-side analysis
• Highlight similarities and differences
• When contrasting sources

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Quality Checklist

• [ ] Purpose is clear
• [ ] Audience is considered
• [ ] Scope is appropriate
• [ ] Emphasis matches needs
• [ ] Format serves purpose
• [ ] Core message is preserved
• [ ] Reduction is proportional
• [ ] No invented information
• [ ] Attribution where needed

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Anti-Patterns

The Information Dump

Problem: Reduces length but not complexity
Fix: Focus on what matters, not just what's short

The Distortion

Problem: Changes meaning through compression
Fix: Verify summary against original claims

The One-Size-Fits-All

Problem: Same approach for all requests
Fix: Match type to purpose and audience

The Over-Abstraction

Problem: Loses all useful specifics
Fix: Preserve concrete details that support understanding

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Integration Points

Inbound:

• When asked to summarize any content
• When processing long documents
• When creating documentation

Outbound:

• To decision-making processes
• To knowledge management systems
• To communication outputs

Complementary:

• speech-adaptation: For spoken summaries
• voice-analysis: For maintaining voice in summaries