frontend-componentization

Guidance for organizing React components, shared interface pieces, page composition, and Storybook examples. Storybook is a tool for viewing and testing interface components separately from the full app.

In plain words
What is it for?
Use it when extracting components, changing shared interface primitives, composing pages, or adding Storybook surfaces.
Why use it?
It helps decide what should stay local to one page and what is safe to share across the application.

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/williamisnotdefined/rubiks-cube-solver/frontend-componentization
Clone the repo
git clone --depth 1 https://github.com/williamisnotdefined/rubiks-cube-solver

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 3,084 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 $0.03084
Opus 5 $0.00000 $0.01542
Sonnet 5 $0.00000 $0.00617
Haiku 4.5 $0.00000 $0.00308

Measured 2d ago against content hash 27630a9f37cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

frontend-componentization 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 2d 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.

.cursor/rules/frontend-componentization.mdc · 197 lines

How it starts

The opening of the file, as written. The whole thing — 197 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generated from ai/registry.json. Do not edit manually.

Canonical skill: ../../ai/skills/frontend-componentization.md.

Referenced context:

  • ../../ai/rules/frontend-component-rules.md
  • ../../ai/rules/frontend-rules.md
  • ../../ai/rules/frontend-styling-rules.md
  • ../../ai/rules/frontend-quality-rules.md
  • ../../ai/architecture/web-architecture.md

This file is compiled from canonical AI knowledge files. Edit canonical files under ai, then run npm run ai:sync.

Compiled AI Skill: frontend-componentization

Canonical Skill: ai/skills/frontend-componentization.md

Frontend Componentization

Use for React component extraction, shared primitives, page composition, and Storybook surfaces.

Read First

  • ai/rules/frontend-component-rules.md
  • ai/rules/frontend-rules.md
  • ai/rules/frontend-styling-rules.md
  • ai/rules/frontend-quality-rules.md
  • ai/architecture/web-architecture.md

Workflow

  • Locate the bounded context and identify the concrete ownership or reuse benefit.
  • Keep page-specific code local; promote only demonstrated cross-context UI.
  • Preserve semantics, focus/keyboard behavior, state ownership, and the established shadcn-compatible visual language.
  • Run targeted tests, Storybook build when stories change, then web build and lint.

Referenced Context

Reference: ai/rules/frontend-component-rules.md

Frontend Component Rules

  • Keep route files readable as composition and keep context-specific components/hooks under their owning src/pages/<Context> tree.
  • Move code to src/components only after a real cross-context consumer exists. Keep context-independent helpers focused and directly imported.
  • Extract when repetition, a named responsibility, or a state boundary justifies it; do not replace a god component with a god hook/provider.
  • Use native semantics first and existing shared primitives for dialogs, sheets, selects, switches, checkboxes, menus, toasts, popovers, tabs, and tooltips.
  • Preserve explicit small props, children for layout composition, keyboard/focus behavior, and accessible names.
  • Use lucide-react for UI icons rather than local SVG component/path markup.
  • Keep stories in nearby stories/ folders and tests in nearby __tests__/ folders. Use controls instead of one story per prop.
  • Do not couple component organization to locale-specific route variants; established slugs remain stable across locales.

Read the full file on GitHub · 197 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. 2d ago First seen · 197 lines · 0 tokens per session scan A 27630a9f37cd

Subscribe to this mod's changes

frontend-componentization is a cursor rule published in the GitHub repository williamisnotdefined/rubiks-cube-solver (4 stars, last pushed 8d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,084 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.