summarization
Create effective summaries by matching summarization type to purpose, audience, and context. Use when asked to summarize, create TLDR, condense content, or create executive summaries. Keywords: summary, TLDR, condense, executive summary, abstract.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/jwynia/agent-skills --skill summarization- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads summarization automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
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.
Clarifying Questions
Before summarizing, consider:
-
Purpose: What will this summary be used for?
- Decision-making
- Background information
- Further research
- Quick understanding
- Reference/recall
-
Audience: Who will read it?
- Technical experts
- General audience
- Decision makers
- Familiar/unfamiliar with topic
-
Scope: How comprehensive?
- Ultra-brief (single sentence)
- Brief (paragraph)
- Moderate (page)
- Extended (multiple pages)
-
Emphasis: What aspects are most important?
- Methodology
- Findings/results
- Arguments/claims
- Context/background
- Implications/applications
-
Format: What structure?
- Narrative text
- Bullet points
- Hierarchical outline
- Visual representation
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 |
Execution by Type
Key Point Extraction
- Scan for topic sentences and conclusions
- Identify explicitly stated main ideas
- List each distinct point
- Preserve original phrasing where powerful
Example: "The author makes three main arguments: (1)..., (2)..., (3)..."
Abstraction
- Group related details
- Find common themes or patterns
- Create higher-level statements
- Reduce specifics to principles
Example: "Multiple studies consistently show..." instead of listing 12 studies
Gisting
- Ask: "What is the one thing to remember?"
- Distill to core insight
- Remove all supporting detail
- Verify essence is preserved
Example: "Remote work increases productivity for most knowledge workers."
Executive Summary
- State the problem/opportunity
- Present the solution/recommendation
- Highlight key benefits
- Note costs/risks
- Specify required actions
Synthesis
- Read all sources
- Identify common themes
- Note contradictions
- Find complementary information
- Create unified narrative
Example: "Across the five reports, three key trends emerge..."
Critical Summary
- Summarize the claims
- Evaluate the evidence
- Assess methodology
- Note limitations
- Conclude with assessment
Example: "While the author claims X, the evidence is limited by..."
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
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
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
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 summariesvoice-analysis: For maintaining voice in summaries
FAQ
What does the summarization skill do?
Create effective summaries by matching summarization type to purpose, audience, and context. Use when asked to summarize, create TLDR, condense content, or create executive summaries. Keywords: summary, TLDR, condense, executive summary, abstract.
How do I install summarization?
Run npx skills add https://github.com/jwynia/agent-skills --skill summarization in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/summarization/ (personal) or .claude/skills/summarization/ (project).
Which AI agents can use summarization?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is summarization safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains summarization?
It is published by jwynia in jwynia/agent-skills. It has 710 recorded installs.
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