What is interface-design?

A product-interface design skill for building, reviewing, auditing, critiquing, or polishing screens in an existing codebase. It covers web interfaces, data views, documentation surfaces, and native iOS or Android screens.

Use it for dashboards, admin panels, settings pages, tools, documentation pages, and mobile screens.

It helps replace undecided or default-looking screens with a considered interface suited to the product.

interface-design — Skill for Claude Code by zpyoung/quirk

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 zpyoung/quirk --skill interface-design

Clone the repo

git clone --depth 1 https://github.com/zpyoung/quirk

Made for: Claude Code.

Or install quirk, the plugin that ships this one along with the rest of its 31 skills, 2 commands, 3 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/zpyoung/quirk/interface-design/github.svg)](https://agentmods.dev/skills/zpyoung/quirk/interface-design)

Your own site

<a href="https://agentmods.dev/skills/zpyoung/quirk/interface-design"><img src="https://agentmods.dev/badge/skills/zpyoung/quirk/interface-design/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/zpyoung/quirk/interface-design"><img src="https://agentmods.dev/badge/skills/zpyoung/quirk/interface-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 128 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,206 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00128	$0.03206
Opus 5.5	$0.00051	$0.01282
Sonnet 5.5	$0.00026	$0.00641
Haiku 4.5	$0.00013	$0.00321

Measured 4d ago against content hash 39efc93d6407, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

interface-design 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 4d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/detect.py, scripts/upstream_diff.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/interface-design/SKILL.md · 174 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

Files

What ships with it

32 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.

4d ago First seen · 174 lines · 128 tokens per session scan A 39efc93d6407

Subscribe to this mod's changes

interface-design is a skill published in the GitHub repository zpyoung/quirk (6 stars, last pushed 5d ago), with no licence file. It adds 128 tokens to every session and 3,206 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-11-07.

Design and UX Frontend

interface-design next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
interface-designzpyoung/quirk	Skill	6	5d ago	none	A	128	Claude Code
webgl-holographic-foilnexu-io/open-design	Skill	107k	today	Apache-2.0	A	41	Claude Code, Codex
html-ppt-hermes-cyber-terminalnexu-io/open-design	Skill	107k	today	Apache-2.0	A	53	Claude Code, Codex
html-ppt-taste-brutalistnexu-io/open-design	Skill	107k	today	Apache-2.0	A	78	Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codex	Skill	34k	yesterday	MIT	A	52	Codex
glance-canonical-layoutsandroid/skills	Skill	10k	yesterday	Apache-2.0	A	56	Claude Code
accessibilitymicrosoft/hve-core	Skill	1.6k	today	MIT	A	47	Claude Code