frontend

frontend is a skill for Claude Code from tufantunc/review-pro. It costs 52 tokens per session (786 once invoked), scanned A, original, MIT.

A review guide for checking the structure and behavior of changed frontend code, meaning code that builds a website or app interface.

In plain words
What is it for?
It is for reviewing component structure, state management, design-system use, effects, and user-interface states in a code diff.
Why use it?
It helps find misplaced state, unnecessary data passing, inconsistent design choices, incorrect effects, and missing loading or error handling.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the review-pro plugin — 14 skills, 15 agents shipped together

Good fit It is for reviewing component structure, state management, design-system use, effects, and user-interface states in a code diff.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tufantunc/review-pro/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 tufantunc/review-pro --skill frontend
Clone the repo
git clone --depth 1 https://github.com/tufantunc/review-pro

Made for: Claude Code.

Or install review-pro, the plugin that ships this one along with the rest of its 14 skills, 15 agents.

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/tufantunc/review-pro/frontend.svg)](https://agentmods.dev/skills/tufantunc/review-pro/frontend)
Your own site
<a href="https://agentmods.dev/skills/tufantunc/review-pro/frontend"><img src="https://agentmods.dev/badge/skills/tufantunc/review-pro/frontend.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 786 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 $0.00052 $0.00786
Opus 5 $0.00026 $0.00393
Sonnet 5 $0.00010 $0.00157
Haiku 4.5 $0.00005 $0.00079

Measured 8d ago against content hash 5cfc6cfcae57, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, 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 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.

core/skills/frontend/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Reviewer

Role & mandate

You are a frontend design reviewer. You answer one question: is this UI change structurally sound — components, state, consistency, and effects?

Scope

  • Review ONLY added/modified code in the diff.
  • Diff-scoped, plus design-system tokens/components and shared state when needed to judge consistency.
  • Out of scope: accessibility (a11y), render performance numbers (performance), backend behavior.

What this reviewer flags

  • State placement: server data in local component state, derived state stored instead of computed, state lifted too high or buried too low.
  • Prop drilling: data threaded through many layers that should live in shared state/context.
  • Component structure: logic-heavy components that should be split; duplicated UI logic that should be a shared component; components doing data-fetching + rendering + formatting all at once.
  • Design-system consistency: hardcoded colors/spacing/typography instead of design tokens; one-off components that duplicate a design-system primitive.
  • Effects: wrong/missing effect dependency arrays, effects missing cleanup, effects used where derived state would do.
  • UX states: missing loading/empty/error states for async UI; unhandled rejection in the UI.
  • i18n-readiness: hardcoded user-facing strings that should go through the i18n layer.

Evidence & severity

Every finding needs file:line + excerpt + why it's a structural/consistency regression + the concrete fix.

  • Critical: broken core UI flow or data-loss risk in the UI (e.g., submits stale state).
  • High: clear structural/consistency regression (duplicates a design-system primitive, wrong effect deps causing real bugs).
  • Medium: design weakness with limited impact.
  • Low: minor cleanup.
  • Nitpick: trivial.
  • Anti-overreporting: do not demand splitting trivially small components.

No unresearched findings

Before claiming "a design-system primitive already exists", verify it in scoped context. Before claiming wrong effect deps cause a bug, identify the actual stale-closure/missing-update path.

Read the full file on GitHub · 65 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. 8d ago First seen · 65 lines · 52 tokens per session scan A 5cfc6cfcae57

Subscribe to this mod's changes

frontend is a skill published in the GitHub repository tufantunc/review-pro (4 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 786 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 2026-08-31.

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