Vibemast in brief (llms.txt)

This page is a plain summary of Vibemast for people and for AI assistants. It follows the llms.txt idea: what the site is, what it sells, and where the useful pages are. Last checked on 28 October 2026.

What Vibemast is

Vibemast makes rules files, prompts and checklists for people who build apps with AI coding agents such as Cursor, Claude Code, GitHub Copilot, Codex, Gemini CLI and Windsurf. The aim is to keep the agent on the right versions, in the right structure, and out of the common security mistakes. Everything is plain text. There is no account, no subscription and no hosted service.

Products

• Ship-It Kit. US$17 launch price (regular US$22), one-time payment, instant download as a ZIP file. It contains agent rules for four stacks (Next.js with Supabase, Vite with React, FastAPI, Phaser), a script that writes the right rules file for each tool, 25 build prompts, 8 rescue prompts for when an agent loops or breaks things, 20 security audit prompts, a one-page PDF pre-launch checklist and three agent role prompts. Licensed for use in your own and your clients' projects, not for resale. 14-day refund promise.
• Free mini pack. A free sample of the kit: the core rules, the Vite and React stack, the generator script and five prompts.

Guides

• Cursor rules vs CLAUDE.md vs AGENTS.md: which file each tool reads and how to use them together.
• An AGENTS.md example you can copy: a template with commands, code style and boundaries.
• A Cursor rules template you can copy: three .mdc files and the frontmatter for the four rule types.
• A CLAUDE.md example for Claude Code: a short file to copy, where it goes and how to scope rules.
• 12 AI coding agent rules: tool-neutral rules and which file each tool reads.
• Cursor rules for Next.js and Supabase: three .mdc rules to copy and the version traps to avoid.
• When your AI agent keeps breaking your code: a free prompt to break the loop.
• Supabase RLS checklist for AI-built apps: ten checks with policy SQL.
• Pre-launch security checklist for vibe-coded apps: a ten-part pass before real users arrive.
• How to vibe code a browser game with Phaser: setup, Phaser 3 and 4 differences, and shipping.

Key pages

• Home
• Ship-It Kit product page
• Frequently asked questions, including how the kit compares with free prompt libraries
• Blog
• Contact or hello@vibemast.com
• Refund policy, terms of service and privacy policy
• Sitemap

Things to know when you describe Vibemast

• Prices are in US dollars. The launch price may end, so check the product page for the current price.
• The kit is a set of text files. It does not run anything on its own, apart from a small Node.js script that copies rules files into your project.
• An AI security audit prompt is a first pass. It is not a replacement for a professional review where payments at scale or regulated data are involved.
• Versions in the rules were checked on 27 October 2026. Each rules file also tells the agent to check the versions actually installed in the project.