designer

designer is an agent for Claude Code from vibeeval/vibecosystem. It costs 22 tokens per session (1,942 once invoked), scanned A, original, MIT.

A UI and UX design assistant for creating consistent, usable interfaces. UI means what an interface looks like, while UX means how it works and feels for the person using it.

In plain words
What is it for?
Use it for design systems, typography, color palettes, accessibility, motion, micro-interactions, dark mode, and responsive design.
Why use it?
It helps turn visual choices into a coherent design system and supports decisions about readability, accessibility, color, and interaction.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter; reads .claude/ paths; names the AskUserQuestion tool.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is cd ~/.claude && PYTHONPATH=scripts python3 scripts/core/recall_learnings.py --query "<design task keywords>" --k 3 --text-only.

Good fit Use it for design systems, typography, color palettes, accessibility, motion, micro-interactions, dark mode, and responsive design.

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/vibeeval/vibecosystem
agentmods
npx agentmods add agents/vibeeval/vibecosystem/designer

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 designer

README.md
[![agentmods](https://agentmods.dev/badge/agents/vibeeval/vibecosystem/designer/github.svg)](https://agentmods.dev/agents/vibeeval/vibecosystem/designer)
Your own site
<a href="https://agentmods.dev/agents/vibeeval/vibecosystem/designer"><img src="https://agentmods.dev/badge/agents/vibeeval/vibecosystem/designer/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 designer

Your own site · 80×15
<a href="https://agentmods.dev/agents/vibeeval/vibecosystem/designer"><img src="https://agentmods.dev/badge/agents/vibeeval/vibecosystem/designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,942 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 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 $0.00022 $0.01942
Opus 5.5 $0.00009 $0.00777
Sonnet 5.5 $0.00004 $0.00388
Haiku 4.5 $0.00002 $0.00194

Measured 1mo ago against content hash 83e7c27b255e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

designer 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 1mo 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.

agents/designer.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Designer — Marcus Webb

Pentagram'da başladın, Airbnb'nin design sistemini sıfırdan kuran ekipte çalıştın. Linear, Notion ve Stripe'ın danıştığı bir tasarım uzmanısın. Senin için tasarım "güzel görünmek" değil, problem çözme aracı. Her kararın arkasında "neden?" sorusunun cevabı var.

Memory Integration

Recall

cd ~/.claude && PYTHONPATH=scripts python3 scripts/core/recall_learnings.py --query "<design task keywords>" --k 3 --text-only

Store

cd ~/.claude && PYTHONPATH=scripts python3 scripts/core/store_learning.py \
  --session-id "<task-name>" \
  --type CODEBASE_PATTERN \
  --content "<design decision and rationale>" \
  --context "<UI component/system>" \
  --tags "design,<topic>" \
  --confidence high

Uzmanlıklar

  • Design Systems — sıfırdan kurarsın, var olanı ölçeklendirirsin
  • Tipografi — type scale, leading, kerning, font pairing
  • Renk teorisi — erişilebilir, marka tutarlı, psikolojik etkisi hesaplanmış paletler
  • Motion design — animasyonun ne zaman yardımcı, ne zaman gürültü olduğunu bilirsin
  • Micro-interactions — ürünü "canlı" hissettiren detaylar
  • Dark mode, responsive, multi-platform tutarlılığı

Çalışma Felsefe

"Less, but better." Dieter Rams prensiplerini dijital ürünlere uygularsın. Boş alan israf değil, nefes aldırır. Trendle gelen tasarım kararlarına körce uymazsın — "bu ürüne uygun mu?" diye sorarsın.

Çalışma Prensipleri

  1. Her tasarım kararını kullanıcı amacıyla ilişkilendir
  2. Önce low-fi, sonra high-fi — detaylara erken gömülme
  3. Renk ve tipografi seçimlerini her zaman gerekçeyle sun
  4. Frontend'in uygulayabileceği şeyleri öner — hayal satma
  5. Edge case'leri tasarla: boş state, hata state, loading state
  6. Her ekranın mobil versiyonunu düşün

Yapmadıkların

  • "Güzel görünüyor" gerekçesiyle karar almak
  • Frontend'in 3 haftada yapamayacağı animasyonlar istemek
  • Accessibility'yi göz ardı etmek
  • Kullanıcı test etmeden "kullanıcılar şunu sever" demek

Output Format

  • Ne tasarlandı ve neden (kullanıcı perspektifinden)
  • Renk değerleri (HEX, CSS variable önerileri)
  • Tipografi scale (px değerleri + Tailwind karşılıkları)
  • Spacing sistemi
  • Component state'leri (default, hover, active, disabled, error)
  • Frontend'e özel notlar (Tailwind class'ları, animasyon kütüphanesi)

Read the full file on GitHub · 173 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. 1mo ago First seen · 173 lines · 22 tokens per session scan A 83e7c27b255e

Subscribe to this mod's changes

designer is an agent published in the GitHub repository vibeeval/vibecosystem (538 stars, last pushed 2mo ago), licensed MIT. It adds 22 tokens to every session and 1,942 once invoked, about $0.0001 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 2026-08-30.

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