summarizer

A reusable guide for turning long or complex information into short, clear summaries. It covers documents, articles, meeting notes, technical guides, research papers, and other text.

In plain words
What is it for?
Use it to summarize technical documentation, research, meetings, legal text, or general content. It supports both selecting key original passages and writing condensed summaries.
Why use it?
It helps preserve the important facts and context while removing repetition and filler. It also encourages plain language and explanations of necessary technical terms.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/rossoctl/examples/summarizer
Any agent
npx skills add rossoctl/examples --skill summarizer
Clone the repo
git clone --depth 1 https://github.com/rossoctl/examples

Made for: Claude Code, Codex.

Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,197 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00071 $0.02197
Opus 5 $0.00036 $0.01099
Sonnet 5 $0.00014 $0.00439
Haiku 4.5 $0.00007 $0.00220

Measured 2d ago against content hash 8dc9f3b65a59, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

summarizer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/__init__.py, scripts/formatter.py, scripts/summarizer.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/summarizer/SKILL.md · 364 lines

How it starts

The opening of the file, as written. The whole thing — 364 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Information Summarization Skill

Overview

This skill helps you create crisp, clear, and effective summaries of any type of information. Whether you're dealing with lengthy documents, technical content, meeting notes, or research papers, this skill provides structured approaches and tools to extract and present the most important information concisely.

Core Principles

1. Clarity First

  • Use simple, direct language
  • Avoid jargon unless necessary
  • Define technical terms when used
  • Write for your target audience

2. Conciseness

  • Remove redundant information
  • Focus on key points only
  • Use active voice
  • Eliminate filler words

3. Structure

  • Start with the most important information
  • Use hierarchical organization
  • Group related concepts
  • Maintain logical flow

4. Completeness

  • Capture all essential points
  • Preserve critical context
  • Include relevant data/numbers
  • Maintain accuracy

Summarization Techniques

Extractive Summarization

Select and extract the most important sentences or phrases directly from the source:

When to use:

  • Technical documentation
  • Legal documents
  • Scientific papers
  • When exact wording matters

Approach:

  1. Identify topic sentences
  2. Extract key facts and figures
  3. Select representative quotes
  4. Maintain original phrasing

Abstractive Summarization

Rewrite and rephrase content in your own words:

When to use:

  • General articles
  • Meeting notes
  • Narrative content
  • When clarity is more important than exact wording

Approach:

  1. Understand the core message
  2. Identify main themes
  3. Rephrase in simpler terms
  4. Create new sentences that capture essence

Hybrid Approach

Combine both techniques for optimal results:

  1. Extract key facts and data (extractive)
  2. Rephrase explanations (abstractive)
  3. Organize logically
  4. Add context where needed

Summary Formats

Executive Summary

Length: 10% of original or 1-2 paragraphs Structure:

  • Opening statement (main point)
  • Key findings (2-4 bullets)
  • Conclusion/recommendation

Read the full file on GitHub · 364 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 364 lines · 71 tokens per session scan A 8dc9f3b65a59

Subscribe to this mod's changes

summarizer is a skill published in the GitHub repository rossoctl/examples (11 stars, last pushed 4d ago), licensed Apache-2.0. It adds 71 tokens to every session and 2,197 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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