frontend

frontend is a skill for Claude Code, Codex from Effulgent-Point/paw. It costs 0 tokens per session (614 once invoked), scanned A, original, MIT.

Guidance for building interfaces with React, Vue, or Angular, which are tools for creating web user interfaces. It covers component structure, state-related code, speed, and accessibility.

In plain words
What is it for?
Use it when designing components, managing hooks or other state logic, improving performance, and meeting basic WCAG 2.1 AA accessibility requirements.
Why use it?
It helps prevent common interface problems such as oversized components, incomplete effect cleanup, inefficient state handling, and barriers for users with disabilities.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/effulgent-point/paw/frontend
Any agent
npx skills add Effulgent-Point/paw --skill frontend
Clone the repo
git clone --depth 1 https://github.com/Effulgent-Point/paw

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 frontend

README.md
[![agentmods](https://agentmods.dev/badge/skills/effulgent-point/paw/frontend.svg)](https://agentmods.dev/skills/effulgent-point/paw/frontend)
Your own site
<a href="https://agentmods.dev/skills/effulgent-point/paw/frontend"><img src="https://agentmods.dev/badge/skills/effulgent-point/paw/frontend.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 614 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00614
Opus 5 $0.00000 $0.00307
Sonnet 5 $0.00000 $0.00123
Haiku 4.5 $0.00000 $0.00061

Measured 5d ago against content hash a8beb85d6ee0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 5d 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.

skills/frontend/SKILL.md · 48 lines

How it starts

The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Skill

When to use: React, Vue, or Angular work — component design, accessibility, performance, state management.

Component design

  • Composition over inheritance — build complex UI from small, focused components
  • Single responsibility — one component, one job. If the name needs "And", split it.
  • Props interface — keep it narrow. More than 5-7 props? The component is doing too much.
  • Prop drilling limit — more than 2 levels deep? Use context or composition (children pattern).
  • Children pattern — prefer <Layout><Content /></Layout> over render props when possible.

Hooks best practices (React)

  • Dependency arrays must be complete — ESLint rule react-hooks/exhaustive-deps is not optional
  • Effects clean up — return a cleanup function for subscriptions, timers, event listeners
  • Custom hooks — extract reusable stateful logic into useXxx hooks
  • Never call hooks conditionally — hooks must be called in the same order every render
  • Avoid useEffect for derived state — compute it during render instead

Accessibility floor (WCAG 2.1 AA)

These are minimums, not aspirations:

  • Every interactive element has an accessible label (aria-label, associated <label>, or visible text)
  • Color contrast: 4.5:1 for normal text, 3:1 for large text
  • All functionality reachable via keyboard (Tab, Enter, Escape, Arrow keys)
  • Focus management: focus moves logically on route change and modal open/close
  • ARIA landmarks on major sections (<main>, <nav>, <aside>)
  • Images: meaningful alt text, or alt="" for decorative
  • Form errors announced to screen readers (aria-live or role="alert")

Performance

  • MemoizationReact.memo, useMemo, useCallback only where there's measured need. Don't prematurely optimize.
  • Virtualization — lists >100 items should use react-window or similar
  • Code splitting — at minimum, split at the route level (React.lazy + Suspense)
  • Image optimization — responsive sizes, lazy loading below the fold, modern formats (WebP/AVIF)
  • Bundle awareness — check import cost. A 500KB library for one function is not worth it.

Read the full file on GitHub · 48 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. 5d ago First seen · 48 lines · 0 tokens per session scan A a8beb85d6ee0

Subscribe to this mod's changes

frontend is a skill published in the GitHub repository Effulgent-Point/paw (2 stars, last pushed 25d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 614 tokens. 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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