Borrowing it
Nothing to install: this file belongs to vibestackdev/vibe-stack. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vibestackdev/vibe-stack/master/AGENTS.mdgit clone --depth 1 https://github.com/vibestackdev/vibe-stackWrote 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.
[](https://agentmods.dev/instructions/vibestackdev/vibe-stack/agents-md)<a href="https://agentmods.dev/instructions/vibestackdev/vibe-stack/agents-md"><img src="https://agentmods.dev/badge/instructions/vibestackdev/vibe-stack/agents-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.
<a href="https://agentmods.dev/instructions/vibestackdev/vibe-stack/agents-md"><img src="https://agentmods.dev/badge/instructions/vibestackdev/vibe-stack/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01353 | $0.01353 |
| Opus 5.5 | $0.00541 | $0.00541 |
| Sonnet 5.5 | $0.00271 | $0.00271 |
| Haiku 4.5 | $0.00135 | $0.00135 |
Grade A, and why
vibe-stack AGENTS.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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — AI Coding Agent Instructions
This file provides project context and instructions for AI coding agents (Cursor, Claude, Copilot, Windsurf, Cline) working within this codebase.
Project Overview
Vibe Stack is a production-ready Next.js 15 + Supabase boilerplate designed for AI-assisted development. It includes 22 .mdc architecture rule files that constrain AI models to generate secure, modern, production-grade code.
Tech Stack
- Framework: Next.js 15 (App Router, Server Components, Server Actions)
- Runtime: React 19
- Database & Auth: Supabase (PostgreSQL, Auth with SSR, Row Level Security)
- Payments: Stripe (Checkout Sessions, Webhooks, Customer Portal)
- Email: Resend (transactional email with HTML templates)
- Validation: Zod (runtime validation at every boundary)
- Styling: Tailwind CSS + shadcn/ui
- Language: TypeScript (strict mode, no
any)
Architecture Principles
- Server Components by default — Only use
'use client'when hooks or event handlers are required getUser()overgetSession()— Server-side auth MUST usegetUser()for JWT verification@supabase/ssronly — Never import from the deprecated@supabase/auth-helpers-nextjs- Zod at every boundary — All user input validated before processing
- RLS on every table — Row Level Security is mandatory, never optional
Directory Structure
src/
├── app/ # Next.js App Router pages and layouts
│ ├── (auth)/ # Auth route group (login, signup)
│ │ ├── actions.ts # Auth server actions with Zod validation
│ │ ├── login/page.tsx # Login page (Server Component)
│ │ └── signup/page.tsx # Signup page (Server Component)
│ ├── auth/confirm/ # PKCE email verification callback
│ ├── dashboard/ # Protected pages (requires auth)
│ ├── api/webhooks/ # External webhook handlers (Stripe)
│ ├── layout.tsx # Root layout (fonts, metadata, dark mode)
│ ├── page.tsx # Landing page
│ ├── loading.tsx # Global loading state
│ ├── error.tsx # Global error boundary
│ └── not-found.tsx # Custom 404
├── lib/ # Business logic & integrations
│ ├── supabase/ # Server + Client factories + middleware helper
│ ├── stripe/ # Checkout session + customer portal helpers
│ ├── email/ # Resend email templates (welcome, password reset)
│ ├── env.ts # Type-safe environment variable access
│ └── utils.ts # cn() helper and general utilities
├── types/ # Shared TypeScript types
│ └── index.ts # ActionResponse<T>, UserProfile, PaginatedResponse
└── middleware.ts # Session refresh entry point
.cursor/
├── rules/ # 22 .mdc architecture rules (auto-loaded by Cursor)
└── mcp.json # 4 MCP server configurations
docs/
├── VIBE-CODING.md # The 3-stage agentic loop framework
├── ARCHITECTURE.md # 8 Architecture Decision Records
└── MCP-SETUP.md # MCP server setup guide
n8n-workflows/ # 3 importable n8n automation templates
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.
- 1mo ago First seen · 132 lines · 1,353 tokens per session scan A 207692b7d110
vibe-stack AGENTS.md is an instructions file published in the GitHub repository vibestackdev/vibe-stack (8 stars, last pushed yesterday), licensed MIT. It adds 1,353 tokens to every session, about $0.0054 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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