extract

extract is a skill for Claude Code from zby/llm-do. It costs 102 tokens per session (10,821 once invoked), scanned A, original, no licence file.

A tool for turning source material into structured notes. Its default mode extracts individual claims, while its analysis mode creates a design proposal from material that could affect how a project is built.

In plain words
What is it for?
Use it to extract claims from documents or analyze source material for design and implementation decisions.
Why use it?
It filters out information that does not change the project, making large sources easier to turn into useful, reviewable knowledge.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter.

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/zby/llm-do/arscontexta-extract
Any agent
npx skills add zby/llm-do --skill arscontexta-extract
Clone the repo
git clone --depth 1 https://github.com/zby/llm-do

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 extract

README.md
[![agentmods](https://agentmods.dev/badge/skills/zby/llm-do/arscontexta-extract.svg)](https://agentmods.dev/skills/zby/llm-do/arscontexta-extract)
Your own site
<a href="https://agentmods.dev/skills/zby/llm-do/arscontexta-extract"><img src="https://agentmods.dev/badge/skills/zby/llm-do/arscontexta-extract.svg" alt="Measured on agentmods" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,821 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00102 $0.10821
Opus 5 $0.00051 $0.05411
Sonnet 5 $0.00020 $0.02164
Haiku 4.5 $0.00010 $0.01082

Measured 6d ago against content hash c6f93a76eaeb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

extract 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 6d 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.

arscontexta/skills/arscontexta-extract/SKILL.md · 1,232 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 6d ago First seen · 1,232 lines · 102 tokens per session scan A c6f93a76eaeb

Subscribe to this mod's changes

extract is a skill published in the GitHub repository zby/llm-do (20 stars, last pushed 6mo ago), with no licence file. It adds 102 tokens to every session and 10,821 once invoked, about $0.0005 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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