What is frontend-stack-blueprint CLAUDE.md?

A repository instruction document defining a standard frontend stack and development rules. It covers tools such as TypeScript, React, Vite, testing libraries, styling systems, forms, and code-quality checks.

Use it when creating or reviewing frontend applications, selecting dependencies, setting up builds and tests, defining styling and UI conventions, or checking project governance.

It gives agents a shared technical baseline for new frontend projects and explains the required architecture and reliability practices.

How barrosohub/frontend-stack-blueprint configures Claude Code

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/CLAUDE.md

Clone the repo

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

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/barrosohub/frontend-stack-blueprint/claude-md/github.svg)](https://agentmods.dev/instructions/barrosohub/frontend-stack-blueprint/claude-md)

Your own site

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

Per session 2,067 This file is loaded in full into every session.

When invoked 2,067 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.

Model	Per session	Once invoked
Fable 5.1	$0.02067	$0.02067
Opus 5.5	$0.00827	$0.00827
Sonnet 5.5	$0.00413	$0.00413
Haiku 4.5	$0.00207	$0.00207

Measured 2mo ago against content hash e49103fef80f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

frontend-stack-blueprint 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 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.

CLAUDE.md · 172 lines

How it starts

The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Frontend Stack Blueprint v2.0.0

This repository defines the canonical frontend stack for any new frontend project. It is platform-agnostic — the same stack applies whether the project targets browser, desktop, or anything else.

The Stack (use for EVERY project)

Language: TypeScript ≥7 (strict mode, no any)
UI: React ≥19.2.7 (function product components; class Error Boundaries allowed)
Routing: TanStack Router ≥1 (default) or React Router ≥8
Tooling: pnpm ≥11.18, Node.js 24 LTS (minimum 22.22), Bun ≥1 (alternative runtime)
Build: Vite ≥8
Test: Vitest ≥4; Playwright ≥1.61 for user-facing deployed applications
Quality: protected CI merge gate + Husky + lint-staged + ESLint + Prettier
Components: Base UI default; Radix UI/React Aria alternatives; Floating UI, Embla Carousel, cmdk
Pre-styled UI: shadcn/ui with an explicit primitive base
Styling: Tailwind CSS ≥4 + clsx + tailwind-merge (no CSS-in-JS ever)
Animations: Motion (formerly Framer Motion) — import from 'motion/react'
DESIGN.md Design Contract (provisional, optional): root DESIGN.md for product visual intent and source tokens
Forms: 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
Dates: date-fns ≥4.1 (+@date-fns/tz for timezones)
State: Zustand (no Redux, MobX) — TanStack Store remains under evaluation
Server State: TanStack Query ≥5.60.60
Rich Text: Lexical (primary), ProseMirror (fallback only)
Syntax: Shiki
Advanced Capabilities (optional): secure Markdown, TanStack Table, Recharts, Mermaid, CodeMirror, xterm.js/node-pty, Yjs, PDF.js
i18n: Format.js + react-intl
Observability: Sentry, OpenTelemetry, and Statsig only when their operational capability applies
Icons: Lucide (default), Phosphor or Tabler as alternatives

Read the full file on GitHub · 172 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 · 172 lines · 2,067 tokens per session scan A e49103fef80f

Subscribe to this mod's changes

frontend-stack-blueprint CLAUDE.md is an instructions file published in the GitHub repository barrosohub/frontend-stack-blueprint (3 stars, last pushed 3mo ago), licensed MIT. It adds 2,067 tokens to every session, about $0.0083 per session on Opus 5.5. 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.

Frontend LLM Languages React TypeScript ai-coding-agents architecture blueprint frontend-stack

frontend-stack-blueprint CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
frontend-stack-blueprint CLAUDE.mdbarrosohub/frontend-stack-blueprint	Instructions file	3	3mo ago	MIT	A	2,067	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

frontend-stack-blueprint: Instructions file for Claude Code