powerplatform-vibecoding-samples: Instructions file for GitHub Copilot

.github/instructions/React-SPA.instructions.md

React-SPA is an instructions file for GitHub Copilot from tchinnin/powerplatform-vibecoding-samples. It costs 5,023 tokens per session, scanned A, original, MIT.

A set of development guidelines for single-page React applications using Fluent UI 9, Microsoft's interface component library. It defines where common project files and reusable components should live and how the application should be documented.

In plain words
What is it for?
Use it when building React single-page applications with components, routes, assets, hooks, authentication, and Fluent UI styling.
Why use it?
It gives a React project a consistent structure, making files easier to find and shared interface parts easier to reuse. It also records project knowledge in a central README file.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is tchinnin/powerplatform-vibecoding-samples's own configuration. It tells GitHub Copilot how to work on powerplatform-vibecoding-samples itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything powerplatform-vibecoding-samples configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is const Home = lazy(() => import('../pages/Home'));.

Reuse

Borrowing it

Nothing to install: this file belongs to tchinnin/powerplatform-vibecoding-samples. 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/tchinnin/powerplatform-vibecoding-samples/main/.github/instructions/React-SPA.instructions.md
Clone the repo
git clone --depth 1 https://github.com/tchinnin/powerplatform-vibecoding-samples

Made for: GitHub Copilot.

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.

agentmods badge for React-SPA

README.md
[![agentmods](https://agentmods.dev/badge/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa/github.svg)](https://agentmods.dev/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa)
Your own site
<a href="https://agentmods.dev/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa"><img src="https://agentmods.dev/badge/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa/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.

agentmods 80×15 button for React-SPA

Your own site · 80×15
<a href="https://agentmods.dev/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa"><img src="https://agentmods.dev/badge/instructions/tchinnin/powerplatform-vibecoding-samples/react-spa.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 5,023 This file is loaded in full into every session.
When invoked 5,023 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.05023 $0.05023
Opus 5.5 $0.02009 $0.02009
Sonnet 5.5 $0.01005 $0.01005
Haiku 4.5 $0.00502 $0.00502

Measured 2mo ago against content hash fe4f0452ecc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

React-SPA 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.

.github/instructions/React-SPA.instructions.md · 701 lines

How it starts

The opening of the file, as written. The whole thing — 701 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fluent UI 9 + React SPA Development Guidelines

This document outlines the standard practices and conventions for React-based development projects using Fluent UI 9 and modern React patterns.


1. Folder Structure

Maintain a clear and consistent folder structure across all projects:

src/
├── README.md             # Global React project documentation
├── assets/               # Static assets (images, fonts, icons)
├── components/           # Reusable UI components
│   ├── ComponentName/
│   │   ├── ComponentName.tsx
│   │   ├── ComponentName.style.ts
│   │   ├── ComponentName.type.ts
│   │   └── index.ts      # Barrel export
│   ├── ProtectedRoute/   # Route guard component
│   │   ├── ProtectedRoute.tsx
│   │   ├── ProtectedRoute.type.ts
│   │   └── index.ts
│   └── MainLayout/       # Layout wrapper for routes
│       ├── MainLayout.tsx
│       ├── MainLayout.style.ts
│       └── index.ts
├── hooks/                # Custom React hooks
│   ├── useAuth.ts        # Authentication hook (for protected routes)
│   ├── useNavigate.ts    # Re-export or custom navigation hook
│   ├── useRouteParams.ts # Type-safe route params hook
│   ├── useHookName.ts
│   └── index.ts          # Barrel export
├── contexts/             # React Context providers
│   ├── AuthContext.tsx   # Authentication context
│   ├── ContextNameContext.tsx
│   └── index.ts          # Barrel export
├── pages/                # Page-level components
│   └── PageName/
│       ├── PageName.tsx
│       ├── PageName.style.ts
│       ├── index.ts      # Barrel export
│       └── README.md     # Page documentation (overview, components used, features)
├── theme/                # Theming configuration
│   └── customTheme.ts
├── routes/               # React Router configuration
│   ├── index.tsx         # Main router configuration with createBrowserRouter
│   ├── constants.ts      # Route path constants (ROUTES object)
│   └── types.ts          # Route parameter types
├── utils/                # Utility functions
├── services/             # API and service integrations
├── models/               # TypeScript type definitions and interfaces
└── mockData/             # Mock data for testing and development

Read the full file on GitHub · 701 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. 2mo ago First seen · 701 lines · 5,023 tokens per session scan A fe4f0452ecc4

Subscribe to this mod's changes

React-SPA is an instructions file published in the GitHub repository tchinnin/powerplatform-vibecoding-samples (6 stars, last pushed 9mo ago), licensed MIT. It adds 5,023 tokens to every session, about $0.0201 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.

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