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frontend-expert: Instructions file for Claude Code

CLAUDE.md

frontend-expert CLAUDE.md is an instructions file for Claude Code from sukirman1901/frontend-expert. It costs 575 tokens per session, scanned A, original, MIT.

A repository instruction file for Frontend Expert, a pack of skills and agents for building product web interfaces. It lists its UI skills, commands, design rules, checks, and supporting files.

In plain words
What is it for?
It helps plan, build, review, test, and polish web UI, including responsive layouts, forms, data-driven screens, routing, accessibility, and visual quality.
Why use it?
It gives a coding agent a defined process for choosing design, responsive layout, accessibility, forms, data handling, and testing guidance. This reduces inconsistent decisions when changing a web interface.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions AGENTS.md.

This is sukirman1901/frontend-expert's own configuration. It tells Claude Code how to work on frontend-expert itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything frontend-expert configures →

not rated 10repo 4d ago A scan 575 tokens original MIT
View source ↗ sukirman1901/frontend-expert
Reuse

Borrowing it

Nothing to install: this file belongs to sukirman1901/frontend-expert. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/sukirman1901/frontend-expert/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/sukirman1901/frontend-expert

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.

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README.md
[![agentmods](https://agentmods.dev/badge/instructions/sukirman1901/frontend-expert/claude-md.svg)](https://agentmods.dev/instructions/sukirman1901/frontend-expert/claude-md)
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<a href="https://agentmods.dev/instructions/sukirman1901/frontend-expert/claude-md"><img src="https://agentmods.dev/badge/instructions/sukirman1901/frontend-expert/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 575 This file is loaded in full into every session.
When invoked 575 The same file — it is already loaded in full.
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 $0.00575 $0.00575
Opus 5 $0.00287 $0.00287
Sonnet 5 $0.00115 $0.00115
Haiku 4.5 $0.00057 $0.00057

Measured 8d ago against content hash 96205e87a78c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

frontend-expert CLAUDE.md 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.

CLAUDE.md · 37 lines

How it starts

The opening of the file, as written. The whole thing — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Claude Code entry point for Frontend Expert.

Plugin assets

  • Skills: skills/ (22 skills — suite root frontend-expert + domain pillars; see docs/pillars.md)
  • Agents: agents/design-reviewer.md, agents/ui-developer.md, agents/test-engineer.md
  • Commands: /design, /audit, /ui, /test-ui, /polish — optional
  • Rules: .claude/rules/design-system.md (chat-first + judgment)
  • Hooks: hooks/hooks.json (SessionStart + PostToolUse anti-slop scan)
  • Tokens: tokens/*.css + decision tree / scoring in references/token-preset-scoring.md (+ tokens/README.md)
  • Evals: evals/ (E1–E23)

Default behavior (chat-first + judgment)

  1. Do not wait for slash commands. Map intent → skills via AGENTS.md + rules
  2. Blank-canvas / ambiguous UI → frontend-judgment (2–3 approaches) before coding
  3. Then → design-tokens (decision tree) → (+ marketing-landing if marketing homepage) → (+ shell/data/forms) → ui-components → responsive-ui → motion (light shell; marketing = families/patterns from motion-families.md, hand-roll) → anti-ai-slop → ui-feel → accessibility
  4. Tests when asked → test-engineer + frontend-testing
  5. Audit when asked → design-reviewer skill chain (/design or /audit); never fabricate visual scores
  6. “Rapihin / polish sampai bagus” → ui-quality-loop (/polish), capped iterations
  7. Honor hook advisories from anti-slop-scan.sh
  8. If the project already has a design system, use custom mode (do not override with presets)
  9. Icons: MUST use Reicon in shipped markup unless project icon lib or text-only waiver (references/compliance-gates.md)
  10. Before DONE on UI builds → Conventions check including Responsive, Hierarchy, Typography, Motion, Shell, Landing (if marketing), A11y (references/compliance-gates.md)

References

See AGENTS.md for the auto intent map, docs/pillars.md for suite pillars, docs/pack-layers.md for layers.

Read the full file on GitHub · 37 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 · 37 lines · 575 tokens per session scan A 96205e87a78c

Subscribe to this mod's changes

frontend-expert CLAUDE.md is an instructions file published in the GitHub repository sukirman1901/frontend-expert (10 stars, last pushed 4d ago), licensed MIT. It adds 575 tokens to every session, about $0.0029 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.

Design and UXFrontend
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