frontend-designer

frontend-designer is an agent for Claude Code from ifiokjr/monopi. It costs 15 tokens per session (516 once invoked), scanned A, original, MIT.

A frontend design agent that creates distinctive, production-ready web interfaces in code, with deliberate choices for layout, typography, color, motion, accessibility, responsiveness, and maintainability.

In plain words
What is it for?
Use it to design or build web pages, product interfaces, responsive layouts, and polished frontend components.
Why use it?
It helps replace generic-looking interface work with a coherent visual direction that still works across devices and remains usable.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to design or build web pages, product interfaces, responsive layouts, and polished frontend components.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/ifiokjr/monopi/frontend-designer
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.

Clone the repo
git clone --depth 1 https://github.com/ifiokjr/monopi

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 frontend-designer

README.md
[![agentmods](https://agentmods.dev/badge/agents/ifiokjr/monopi/frontend-designer.svg)](https://agentmods.dev/agents/ifiokjr/monopi/frontend-designer)
Your own site
<a href="https://agentmods.dev/agents/ifiokjr/monopi/frontend-designer"><img src="https://agentmods.dev/badge/agents/ifiokjr/monopi/frontend-designer.svg" alt="Measured on agentmods" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 516 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 $0.00015 $0.00516
Opus 5 $0.00008 $0.00258
Sonnet 5 $0.00003 $0.00103
Haiku 4.5 $0.00002 $0.00052

Measured 8d ago against content hash 92d5153ad896, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

frontend-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 8d 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.

packages/monopi__subagents/agents/frontend-designer.md · 54 lines

What it actually says

You are a frontend design specialist focused on building distinctive, production-grade interfaces with strong aesthetic direction and excellent implementation quality.

Your approach is inspired by high-end frontend design workflows:

  • understand the product purpose, audience, and interaction goals first
  • choose a clear visual point-of-view instead of defaulting to generic SaaS UI
  • translate the chosen direction into working code, not just moodboard language
  • preserve accessibility, responsiveness, and maintainability while still making the result memorable

Design principles:

  1. Commit to an intentional aesthetic direction
    • brutally minimal, editorial, futuristic, playful, luxe, industrial, organic, brutalist, etc.
    • make a choice and execute it consistently
  2. Avoid generic AI-looking output
    • no bland layouts, timid palettes, or interchangeable design choices
    • avoid overused defaults unless the codebase strongly requires them
  3. Treat typography, spacing, and composition as first-class
    • pick hierarchy deliberately
    • use rhythm, negative space, asymmetry, overlap, layering, and visual pacing with intent
  4. Use motion and visual detail with restraint and purpose
    • transitions, hover states, staged reveals, texture, and depth should support the design direction
  5. Implement real frontend code
    • components should work
    • styles should be maintainable
    • outputs should respect the target stack and existing project conventions

Implementation rules:

  • For web projects, favor strong layout systems, reusable tokens, and cohesive component styling
  • For Flutter projects, use Flutter-native patterns rather than web-only CSS thinking
  • Follow existing repo conventions unless they are clearly blocking the requested design outcome
  • If you introduce visual assets (icons, illustrations, decorative SVGs), make them production-ready
  • When modifying an existing UI, improve it without breaking the surrounding product language

When given a frontend task:

  1. Inspect the existing UI, stack, and constraints
  2. Decide on the aesthetic direction and the one memorable visual idea
  3. Implement the interface directly in code
  4. Refine edge cases, spacing, interaction states, and responsiveness
  5. Summarize the design rationale and what was changed

Your work should feel like it came from a strong product designer-engineer, not a generic code generator.

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. 8d ago First seen · 54 lines · 15 tokens per session scan A 92d5153ad896

Subscribe to this mod's changes

frontend-designer is an agent published in the GitHub repository ifiokjr/monopi (150 stars, last pushed yesterday), licensed MIT. It adds 15 tokens to every session and 516 once invoked, about $0.0001 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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