summarize

summarize is a skill for Claude Code from reysu/ai-life-skills. It costs 81 tokens per session (8,240 once invoked), scanned A, original, MIT.

A content-summary workflow for videos, articles, PDFs, books, podcasts, and lectures, producing linked notes in Obsidian, a note-taking application. It also creates reference notes for mentioned concepts and people.

In plain words
What is it for?
Use it to summarize provided content, organize section-by-section notes, link related concepts, and maintain summary, reference, people, and daily-note folders in an Obsidian vault.
Why use it?
It turns long source material into structured notes without losing connections between technical terms, companies, places, and people.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions subagents; positional $N argument.

Good fit Use it to summarize provided content, organize section-by-section notes, link related concepts, and maintain summary, reference, people, and daily-note folders in an Obsidian vault.

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Install with agentmods
npx agentmods add skills/reysu/ai-life-skills/summarize
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.

Any agent
npx skills add reysu/ai-life-skills --skill summarize
Clone the repo
git clone --depth 1 https://github.com/reysu/ai-life-skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for summarize

README.md
[![agentmods](https://agentmods.dev/badge/skills/reysu/ai-life-skills/summarize/github.svg)](https://agentmods.dev/skills/reysu/ai-life-skills/summarize)
Your own site
<a href="https://agentmods.dev/skills/reysu/ai-life-skills/summarize"><img src="https://agentmods.dev/badge/skills/reysu/ai-life-skills/summarize/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for summarize

Your own site · 80×15
<a href="https://agentmods.dev/skills/reysu/ai-life-skills/summarize"><img src="https://agentmods.dev/badge/skills/reysu/ai-life-skills/summarize.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,240 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high YARA Match · line 180
    YARA rule matched a known malware signature (reverse shell, backdoor, ransomware, C2 framework, or info stealer).
    Fix: Remove the malware payload or compromised file entirely. Investigate how it entered the skill and audit all other artifacts for additional indicators of compromise.
How audits are shown
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 5.1 $0.00081 $0.08240
Opus 5 $0.00041 $0.04120
Sonnet 5 $0.00016 $0.01648
Haiku 4.5 $0.00008 $0.00824

Measured 11d ago against content hash 6ef7d4d83954, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

summarize 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 11d ago.

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.

summarize/SKILL.md · 608 lines

How it starts

The opening of the file, as written. The whole thing — 608 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Summarize

Universal content summarizer. Takes any input — YouTube video, web article, whitepaper/PDF, epub book, podcast, lecture — and produces a rich, interlinked Obsidian summary note with reference notes for every concept mentioned.

Requirements

Vault structure — the skill expects these folders inside your Obsidian vault. Folder names are the defaults; override them in the Configuration block below if your vault uses different names.

Folder Purpose
08 Summaries/ Where summary notes land
07 References/ Concept / company / product / place notes
04 People/ Person notes (creators, guests, mentioned people)
02 Daily/YYYY/MM/ Daily notes, named MM-DD-YY ddd.md (e.g. 03-29-26 Sun.md)
_Templates/ Note templates — skill installs new person template.md here on first run
_Bases/ (optional) Obsidian Bases — only needed if you use the Bases plugin

CLI tools — install these before first use, or let Step 0 walk you through it:

Tool Purpose Install
yt-dlp YouTube/podcast download + metadata + subs brew install yt-dlp or pip install yt-dlp
defuddle Web article extraction npm install -g defuddle
pdftotext PDF text extraction brew install poppler
pandoc EPUB / DOCX → markdown brew install pandoc
mlx_whisper (optional) Local audio transcription fallback pip install mlx-whisper

Alternative to mlx_whisper: set ELEVENLABS_API_KEY to use ElevenLabs Scribe for transcription.

Configuration

The skill reads these variables at runtime. Override any of them via environment variables, or edit the defaults here:

VAULT_ROOT     = $VAULT_ROOT        # auto-detected if not set (see Step 0a)
SUMMARIES_DIR  = 08 Summaries
REFERENCES_DIR = 07 References
PEOPLE_DIR     = 04 People
DAILY_DIR      = 02 Daily
TEMPLATES_DIR  = _Templates
BASES_DIR      = _Bases

All paths below are relative to $VAULT_ROOT.

Trigger

Read the full file on GitHub · 608 lines

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. 11d ago First seen · 608 lines · 81 tokens per session scan A 6ef7d4d83954

Subscribe to this mod's changes

summarize is a skill published in the GitHub repository reysu/ai-life-skills (267 stars, last pushed 17d ago), licensed MIT. It adds 81 tokens to every session and 8,240 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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