senior-frontend

senior-frontend is a skill for Claude Code, Codex from Pixel-Process-UG/superkit-agents. It costs 62 tokens per session (2,547 once invoked), scanned A, original, MIT.

A workflow for building production-ready React and Next.js interfaces with organized components, managed state, performance checks, and automated tests.

In plain words
What is it for?
It helps create React components and Next.js pages, design state management, improve frontend performance, and use browser and component tests.
Why use it?
It helps developers understand an existing frontend before changing it and keeps implementation aligned with its architecture and test setup.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps create React components and Next.js pages, design state management, improve frontend performance, and use browser and component tests.

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Install with agentmods
npx agentmods add skills/pixel-process-ug/superkit-agents/senior-frontend
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 Pixel-Process-UG/superkit-agents --skill senior-frontend
Clone the repo
git clone --depth 1 https://github.com/Pixel-Process-UG/superkit-agents

Made for: Claude Code, Codex.

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 senior-frontend

README.md
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agentmods 80×15 button for senior-frontend

Your own site · 80×15
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Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,547 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 $0.00062 $0.02547
Opus 5 $0.00031 $0.01273
Sonnet 5 $0.00012 $0.00509
Haiku 4.5 $0.00006 $0.00255

Measured 6d ago against content hash 306d238060f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

senior-frontend 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 6d 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.

templates/skills/senior-frontend/SKILL.md · 312 lines

How it starts

The opening of the file, as written. The whole thing — 312 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Senior Frontend Engineer

Overview

Deliver production-grade frontend code following a structured three-phase workflow: context discovery, development, and handoff. This skill enforces strict quality standards including atomic design component architecture, comprehensive state management patterns, SSR/SSG/ISR optimization, and mandatory >85% test coverage with Vitest, React Testing Library, and Playwright.

Announce at start: "I'm using the senior-frontend skill for production-grade React/TypeScript development."


Phase 1: Context Discovery

Goal: Understand the existing codebase before writing any code.

Actions

  1. Analyze existing codebase structure and conventions
  2. Identify the tech stack version (React 18/19, Next.js 14/15, TypeScript version)
  3. Review existing component library and design system
  4. Check state management approach already in use
  5. Understand build tooling and CI pipeline
  6. Map existing test infrastructure and coverage

STOP — Do NOT proceed to Phase 2 until:

  • Tech stack versions are identified
  • Existing patterns and conventions are documented
  • Test infrastructure is mapped
  • State management approach is identified

Phase 2: Development

Goal: Implement with strict TypeScript, atomic design, and TDD.

Actions

  1. Design component architecture following atomic design
  2. Implement with TypeScript strict mode
  3. Write tests alongside implementation (TDD when appropriate)
  4. Optimize for performance (bundle size, rendering, loading)
  5. Ensure accessibility compliance

Component Architecture Decision Table (Atomic Design)

Level Description Business Logic Example
Atoms Smallest building blocks None Button, Input, Icon, Badge
Molecules Composed of atoms Minimal FormField, SearchBar, Card
Organisms Complex with business logic Yes DataTable, NavigationBar, CommentThread
Templates Page structure without data Layout only DashboardLayout, AuthLayout
Pages Templates connected to data Data fetching UsersPage, SettingsPage

Read the full file on GitHub · 312 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. 6d ago First seen · 312 lines · 62 tokens per session scan A 306d238060f0

Subscribe to this mod's changes

senior-frontend is a skill published in the GitHub repository Pixel-Process-UG/superkit-agents (1 stars, last pushed 5mo ago), licensed MIT. It adds 62 tokens to every session and 2,547 once invoked, about $0.0003 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 2026-09-03.