frontend-react

A set of coding rules for a React frontend, where React is a JavaScript library for building user interfaces. It defines file naming, JSX-only code, Tailwind CSS styling, data fetching, forms, and error handling.

In plain words
What is it for?
Guiding work on React components and pages, including React Query data access, form validation, notifications, and Tailwind-based styling.
Why use it?
Shared rules make a codebase more consistent and help prevent developers from using incompatible file types, import paths, styling methods, or data-fetching patterns.

Cursor rule for Cursor

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 rules/ayimmam/pcic/frontend-react
Clone the repo
git clone --depth 1 https://github.com/ayimmam/PCIC

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 409 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 $0.00409
Opus 5 $0.00000 $0.00204
Sonnet 5 $0.00000 $0.00082
Haiku 4.5 $0.00000 $0.00041

Measured yesterday against content hash d92e66d2ae5f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

frontend-react 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 yesterday.

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.

.cursor/rules/frontend-react.mdc · 42 lines

What it actually says

Frontend Conventions

File Patterns

  • Components: client/src/components/{module}/ComponentName.jsx — PascalCase
  • Pages: client/src/pages/PageName.jsx — PascalCase
  • Hooks: client/src/hooks/useFeature.js — camelCase with use prefix
  • UI primitives: client/src/components/ui/ — Shadcn generated, avoid editing directly

Component Rules

  • JSX only — never use TypeScript (.tsx/.ts). No type annotations, no interfaces.
  • Use export default function ComponentName() for pages and feature components
  • Use React.forwardRef for UI primitives (Shadcn pattern)
  • Use @/ path alias for all imports: import { Button } from "@/components/ui/button"
  • Styling is Tailwind CSS classes only — no CSS modules, no styled-components
  • Use cn() from @/lib/utils to merge conditional classes

Data Fetching

  • Always use React Query hooks from client/src/hooks/:
    • useEvents(), useDecisions(), useStrikes(), useCandidates(), useMembers()
  • Mutations invalidate queries via queryClient.invalidateQueries()
  • API errors are caught and shown via toast.error() from Sonner

Forms

  • Use react-hook-form + zod schemas + @hookform/resolvers/zod
  • Define zod schema above the component, pass to useForm({ resolver: zodResolver(schema) })

Auth / Access Control

  • Wrap protected content in <RoleGate allowedRoles={[...]}>
  • Never check roles inline — use the RoleGate component
  • Auth state comes from useAuth() hook (wraps AuthContext)
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. yesterday First seen · 42 lines · 0 tokens per session scan A d92e66d2ae5f

Subscribe to this mod's changes

frontend-react is a cursor rule published in the GitHub repository ayimmam/PCIC (2 stars, last pushed 1mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 409 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.