stack

A set of rules for building the user-facing part of a web application with React, a JavaScript interface library, using either Next.js or Vite. It also defines the project’s testing, accessibility, translation, and code-checking standards.

In plain words
What is it for?
Use it when creating or finishing screens, components, data fetching, translations, keyboard-accessible controls, tests, and automated checks.
Why use it?
It gives developers one shared way to organise and review frontend code, reducing inconsistent patterns and unfinished work.

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/ddebixx/frontend-template/stack
Clone the repo
git clone --depth 1 https://github.com/ddebixx/frontend-template

Made for: Cursor.

Per session 238 This file is loaded in full into every session.
When invoked 238 The same file — it is already loaded in full.
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 $0.00238 $0.00238
Opus 5 $0.00119 $0.00119
Sonnet 5 $0.00048 $0.00048
Haiku 4.5 $0.00024 $0.00024

Measured yesterday against content hash 55e755da1514, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

stack 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/stack.mdc · 22 lines

What it actually says

Stack & DoD

This repo is a Next.js App Router or Vite + React frontend template.

Defaults: TypeScript strict, Tailwind + cn/twMerge, Biome, Fallow, Vitest, Playwright, Tanstack Query + Zod. State: Context/useState first; Zustand only when justified. i18n + a11y are part of the standards (see INDEX). No Storybook in this template.

Before finishing work:

  • Prefer existing folders under src/ / e2e/ (features/, components/, providers/, fetchers/, hooks/, …)
  • Keep lint/types/tests green
  • Validate API data with Zod in fetchers/
  • Use cn for Tailwind class merges; ship semantic, keyboard-accessible UI
  • No inline display strings in components/pages — use locale catalogs or *.constants.ts (project chooses)
  • See docs/frontend/INDEX.md for full standards
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 · 22 lines · 238 tokens per session scan A 55e755da1514

Subscribe to this mod's changes

stack is a cursor rule published in the GitHub repository ddebixx/frontend-template (3 stars, last pushed 24d ago), licensed MIT. It adds 238 tokens to every session, about $0.0012 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.