defuddle

defuddle is a skill for Claude Code, Codex from michaeljauk/brain-starter. It costs 54 tokens per session (257 once invoked), scanned A, a copy of defuddle, MIT.

A skill for using the Defuddle command-line tool to turn web pages into clean Markdown text without navigation and other clutter.

In plain words
What is it for?
Use it when a user provides a web-page URL that needs to be read or analyzed, including extracting its title, description, or domain.
Why use it?
It makes online articles and documentation easier to read and uses less context than copying an entire page.

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/michaeljauk/brain-starter/defuddle
Any agent
npx skills add michaeljauk/brain-starter --skill defuddle
Clone the repo
git clone --depth 1 https://github.com/michaeljauk/brain-starter

Made for: Claude Code, Codex.

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 defuddle

README.md
[![agentmods](https://agentmods.dev/badge/skills/michaeljauk/brain-starter/defuddle.svg)](https://agentmods.dev/skills/michaeljauk/brain-starter/defuddle)
Your own site
<a href="https://agentmods.dev/skills/michaeljauk/brain-starter/defuddle"><img src="https://agentmods.dev/badge/skills/michaeljauk/brain-starter/defuddle.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 257 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod 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 $0.00054 $0.00257
Opus 5 $0.00027 $0.00129
Sonnet 5 $0.00011 $0.00051
Haiku 4.5 $0.00005 $0.00026

Measured 3d ago against content hash cb702b754dd3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

defuddle 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 3d 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.

Origin

This is a copy

86% identical to defuddle — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/defuddle/SKILL.md · 42 lines

What it actually says

Defuddle

Use Defuddle CLI to extract clean readable content from web pages. Prefer over WebFetch for standard web pages — it removes navigation, ads, and clutter, reducing token usage.

If not installed: npm install -g defuddle

Usage

Always use --md for markdown output:

defuddle parse <url> --md

Save to file:

defuddle parse <url> --md -o content.md

Extract specific metadata:

defuddle parse <url> -p title
defuddle parse <url> -p description
defuddle parse <url> -p domain

Output formats

Flag Format
--md Markdown (default choice)
--json JSON with both HTML and markdown
(none) HTML
-p <name> Specific metadata property
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. 3d ago First seen · 42 lines · 54 tokens per session scan A cb702b754dd3

Subscribe to this mod's changes

defuddle is a skill published in the GitHub repository michaeljauk/brain-starter (5 stars, last pushed 7d ago), licensed MIT. It adds 54 tokens to every session and 257 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to defuddle, differing in 2 lines, and is treated as a copy.

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