A set of Cursor instructions for building frontend applications with a specified technology stack and development process. Cursor is a coding editor with built-in AI assistance.

Use it to guide frontend code generation and reviews involving TypeScript, React, routing, Vite, tests, CI, UI components, Tailwind CSS, forms, and related tools.

It gives the agent consistent choices for languages, frameworks, testing, styling, and code quality. It also points new projects toward the newer .cursor/rules format because this file is kept for compatibility.

How barrosohub/frontend-stack-blueprint configures Cursor

Reuse

Borrowing it

Nothing to install: this file belongs to barrosohub/frontend-stack-blueprint. 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/barrosohub/frontend-stack-blueprint/main/.cursorrules

Clone the repo

git clone --depth 1 https://github.com/barrosohub/frontend-stack-blueprint

Made for: Cursor.

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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/barrosohub/frontend-stack-blueprint/cursorrules/github.svg)](https://agentmods.dev/rules/barrosohub/frontend-stack-blueprint/cursorrules)

Your own site

<a href="https://agentmods.dev/rules/barrosohub/frontend-stack-blueprint/cursorrules"><img src="https://agentmods.dev/badge/rules/barrosohub/frontend-stack-blueprint/cursorrules/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/rules/barrosohub/frontend-stack-blueprint/cursorrules"><img src="https://agentmods.dev/badge/rules/barrosohub/frontend-stack-blueprint/cursorrules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,746 This file is loaded in full into every session.

When invoked 1,746 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 92% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.01746	$0.01746
Opus 5.5	$0.00698	$0.00698
Sonnet 5.5	$0.00349	$0.00349
Haiku 4.5	$0.00175	$0.00175

Measured 2mo ago against content hash a799ce202802, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cursorrules 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 2mo 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.

Origin

This is a copy

92% identical to frontend-stack-blueprint — 11 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.cursorrules · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Stack Blueprint

⚠️ DEPRECATION: This .cursorrules file is kept for backward compatibility. Cursor now reads from .cursor/rules (modern format). New projects should use .cursor/rules instead.

Canonical frontend stack for any new project. Platform-agnostic. This file defines the technology decisions and rules an AI coding agent MUST follow when generating frontend code.

Stack

TypeScript ≥7 (strict mode, no any)
React ≥19.2.7 (function product components; class Error Boundaries allowed)
TanStack Router ≥1 (default) or React Router ≥8
pnpm (priority package manager) · Node.js >=22.22 · Bun ≥1 (runtime alternative)
Vite ≥8 (requires Node.js >=22.22)
Vitest ≥4 (4.x recommended) + Playwright ≥1.61 for deployed UI
Protected CI merge gate + Husky + lint-staged + ESLint + Prettier
Base UI · Radix/React Aria alternatives · shadcn/ui (recommended) · Floating UI · Embla · cmdk
Tailwind CSS ≥4 + clsx + tailwind-merge (cn() utility required)
Motion (formerly Framer Motion) — import from 'motion/react'
DESIGN.md Design Contract (provisional, optional): root DESIGN.md → generated Tailwind 4 tokens
React Hook Form + Zod
Data Access (optional): Prisma ≥7
Authentication (optional): Better Auth ≥1
Managed Services (optional): Neon Postgres | Cloudflare D1 | Cloudflare R2 | Cloudflare KV | Resend
date-fns ≥4.1 (+@date-fns/tz)
Zustand · TanStack Query ≥5 (TanStack Store remains under evaluation)
Lexical (primary) · ProseMirror (fallback) · Shiki
Advanced Capabilities (optional): Markdown · TanStack Table · Recharts · Mermaid · CodeMirror · xterm/node-pty · Yjs · PDF.js
Format.js · react-intl
Sentry · OpenTelemetry · Statsig (capability-gated)
Lucide (default icon library)

Architecture (MANDATORY)

Structure by feature/domain, NEVER by file type
Composition over inheritance — hooks for logic reuse
Strong typing: strict mode, no any; explicit public boundaries and useful local inference
DRY: extract only after stable shared semantics are proven
KISS: components ≤150 lines, functions ≤30 lines
YAGNI: no speculative features or abstractions
React Compiler 1.x: incremental opt-in after compatibility and performance validation

Read the full file on GitHub · 147 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.

2mo ago First seen · 147 lines · 1,746 tokens per session scan A a799ce202802

Subscribe to this mod's changes

cursorrules is a cursor rule published in the GitHub repository barrosohub/frontend-stack-blueprint (3 stars, last pushed 3mo ago), licensed MIT. It adds 1,746 tokens to every session, about $0.0070 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to frontend-stack-blueprint, differing in 11 lines, and is treated as a copy.

Frontend LLM ai-coding-agents architecture blueprint frontend-stack

cursorrules next to 6 cursor rules from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
cursorrulesbarrosohub/frontend-stack-blueprint	Cursor rule	3	3mo ago	MIT	A	1,746	Cursor
shadcn-tailwind-guidedtyq/magic	Cursor rule	5.1k	13d ago	none	A	13	Cursor
dreamd-recallbotzrDev/dreamd	Cursor rule	6	yesterday	Apache-2.0	A	135	Cursor
ponytailDietrichGebert/ponytail	Cursor rule	185k	8d ago	MIT	A	604	Cursor
angular-20angular/angular	Cursor rule	101k	yesterday	MIT	A	0	Cursor
dev-standardapache/superset	Cursor rule	75k	today	Apache-2.0	A	1,147	Cursor
prefer-assertions-over-defensive-checksprisma/orm	Cursor rule	48k	yesterday	Apache-2.0	A	0	Cursor

frontend-stack-blueprint: Cursor rule for Cursor