Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add m0hamed-ux/design-extractor/plugin install design-extractorWrote 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.
[](https://agentmods.dev/skills/m0hamed-ux/design-extractor/design-extractor)<a href="https://agentmods.dev/skills/m0hamed-ux/design-extractor/design-extractor"><img src="https://agentmods.dev/badge/skills/m0hamed-ux/design-extractor/design-extractor/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.
<a href="https://agentmods.dev/skills/m0hamed-ux/design-extractor/design-extractor"><img src="https://agentmods.dev/badge/skills/m0hamed-ux/design-extractor/design-extractor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00142 | $0.01600 |
| Opus 5 | $0.00071 | $0.00800 |
| Sonnet 5 | $0.00028 | $0.00320 |
| Haiku 4.5 | $0.00014 | $0.00160 |
Grade A, and why
design-extractor scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Extractor
Turn any live website into a reusable DESIGN.md — a design spec detailed enough
that another Claude (or a developer) could rebuild a new project in the same
visual language. You capture what the site looks like (via screenshots) and
what it's made of (computed colors, fonts, spacing), then synthesize both into
one document.
The screenshots are the source of truth. Token frequency data is a helpful cross- check, but your eyes on the rendered page are what make the spec accurate — a font name in CSS tells you less than seeing how type is actually used.
Prerequisites
The capture script needs Python 3.9+ with a few packages. If a capture run fails with a missing-module error, install them first:
python -m pip install -r "${CLAUDE_PLUGIN_ROOT}/requirements.txt"
python -m playwright install chromium
The playwright install chromium step downloads the headless browser (one-time,
per machine). The script also attempts this automatically on first run. If the
browser still can't run, the script falls back to a plain HTML/CSS scrape — lower
fidelity, but it keeps working on locked-down machines.
Workflow
1. Capture the site
Run the capture script. It renders the homepage plus a few auto-discovered key pages (pricing, about, features…), saves full-page and above-the-fold screenshots, extracts computed style tokens, and writes everything to an output directory.
python "${CLAUDE_PLUGIN_ROOT}/skills/design-extractor/scripts/capture_site.py" <domain> --out <workspace>/capture --max-pages 3
<domain>: what the user gave you, e.g.stripe.comorhttps://linear.app.--out: a fresh directory, ideally named after the domain (e.g.stripe-capture/).--max-pages: total pages including the homepage. 3 is a good default; raise to 4–5 only if the user wants exhaustive component coverage.
${CLAUDE_PLUGIN_ROOT} is set automatically to this plugin's install directory,
so the path works wherever the plugin lives. If for some reason that variable
isn't available, locate capture_site.py under the plugin's
skills/design-extractor/scripts/ directory and call it directly.
What ships with it
2 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.
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.
- 9d ago First seen · 153 lines · 142 tokens per session scan A e1b5be77f238
design-extractor is a skill published in the GitHub repository m0hamed-ux/design-extractor (3 stars, last pushed 3mo ago), licensed MIT. It adds 142 tokens to every session and 1,600 once invoked, about $0.0007 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 2026-08-31.
Other skills, from other repositories
eye
Design judgment via design-director taste — reads design intent, assesses whether execution serves it, returns opinionated verdict with clear direction. Scales from one element to a whole app. Always judgment, never fixing. Invoke ONLY via /eye — do NOT trigger on 'review the design' or 'how does it look'.
design-system
Use when starting a frontend or working on its look and feel, to establish and enforce a DESIGN.md-driven custom design system as the single source of truth for tokens, components, and icons. Make any generated UI (including 21st.dev Magic output) conform to DESIGN.md.
lottie-design
Search, fetch, and integrate free Lottie animations into React, React Native, Vue, Svelte, Angular, Flutter, and Vanilla web projects. Use when the user asks for any Lottie/dotLottie/animation work — loaders, success checkmarks, splash screens, empty states, onboarding, micro-interactions. Triggers on keywords like…
sxo
Search Experience Optimization (SXO) — the bridge between SEO and UX/CRO. Audits the full journey from the SERP click to the on-page goal: SERP click-through factors (title/meta/rich results that win the click), then post-click experience signals that keep users and drive conversions — above-the-fold relevance and…
designlang-tokens
Use when styling UI for cal.com — references the extracted design system tokens instead of inventing colors, spacing, or typography.
presentation-design
Designs slide decks and one-pagers that carry an argument rather than decorate one — deck structure, headlines that state the takeaway, charts that make a single point, and the different rules board decks and conference talks follow. Use this to build or fix a pitch deck, board deck, or conference talk, to design a…