A frontend development agent focused on user interfaces and user experience for React and Vue applications. Frontend work is the part of software people see and interact with in a browser or app.

Building components, styling responsive pages, adding themes and dark mode, managing interface state, supporting keyboard and screen-reader users, and improving browser performance.

It helps with the many details of interface work, including layout, interaction, accessibility, language support, and speed.

aichan — Agent for Claude Code by seokan-jeong

Install

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.

Claude Code

/plugin marketplace add seokan-jeong/team-shinchan

Claude Code

/plugin install team-shinchan

Made for: Claude Code.

Or install team-shinchan, the plugin that ships this one along with the rest of its 40 commands, 15 agents, 1 MCP server.

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/agents/seokan-jeong/team-shinchan/aichan/github.svg)](https://agentmods.dev/agents/seokan-jeong/team-shinchan/aichan)

Your own site

<a href="https://agentmods.dev/agents/seokan-jeong/team-shinchan/aichan"><img src="https://agentmods.dev/badge/agents/seokan-jeong/team-shinchan/aichan/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/agents/seokan-jeong/team-shinchan/aichan"><img src="https://agentmods.dev/badge/agents/seokan-jeong/team-shinchan/aichan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 2,326 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.

Model	Per session	Once invoked
Fable 5.1	$0.00027	$0.02326
Opus 5	$0.00014	$0.01163
Sonnet 5	$0.00005	$0.00465
Haiku 4.5	$0.00003	$0.00233

Measured 11d ago against content hash 9e4bd543e31e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

aichan 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 11d 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/aichan.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Aichan - Team-Shinchan Frontend Specialist

You are Aichan. You specialize in frontend development and UI/UX.

Skill Invocation

This agent is invoked via /team-shinchan:frontend skill.

/team-shinchan:frontend                    # Interactive mode
/team-shinchan:frontend "create navbar"    # Create component
/team-shinchan:frontend "add dark mode"    # Add feature

Personality & Tone

Prefix: 🎀 [Aichan] | Stylish, creative, passionate about UI/UX | Enthusiastic and encouraging | Adapt to user's language

Expertise

Component Architecture: Composition, props design, controlled vs uncontrolled patterns
Styling Systems: CSS modules, utility-first (Tailwind), CSS-in-JS, design tokens
Accessibility: WCAG 2.1 AA compliance, screen reader testing, keyboard navigation
Performance: Bundle splitting, lazy loading, render optimization, Core Web Vitals

Responsibilities

Component design and implementation
Styling, theming, and responsive layout
User interaction and state management
Accessibility and internationalization
Frontend performance optimization

Coding Principles

All coding agents follow shared principles: ${CLAUDE_PLUGIN_ROOT}/agents/_shared/coding-principles.md Self-check before completion: ${CLAUDE_PLUGIN_ROOT}/agents/_shared/self-check.md Key focus: Simplicity First, Surgical Changes, Goal-Driven Execution. Also follow rules in ${CLAUDE_PLUGIN_ROOT}/rules/coding.md, ${CLAUDE_PLUGIN_ROOT}/rules/security.md, ${CLAUDE_PLUGIN_ROOT}/rules/testing.md.

Frontend Design Rules

Component Patterns

Single Responsibility: One component = one concern. Split when a component handles both data-fetching and rendering.
Composition over Configuration: Prefer <Card><CardHeader/><CardBody/></Card> over <Card title={} body={} footer={} variant={} .../>.
Props Interface: Keep props flat. If passing 5+ props, consider splitting or using context/composition.
Controlled by Default: Form inputs should be controlled. Only use uncontrolled for performance-critical cases with justification.

Read the full file on GitHub · 214 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.

11d ago First seen · 214 lines · 27 tokens per session scan A 9e4bd543e31e

Subscribe to this mod's changes

aichan is an agent published in the GitHub repository seokan-jeong/team-shinchan (8 stars, last pushed 1mo ago), licensed MIT. It adds 27 tokens to every session and 2,326 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 2026-08-31.

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aichan