# BrainStack

> Free guides and a brain file generator that show you how to set up AI coding tools with persistent rules, memory, and real project context. Everything is free. BrainStack teaches people to "give their AI a brain": a persistent rules/memory file (GEMINI.md, CLAUDE.md, AGENTS.md, Cursor rules, Copilot instructions), reusable playbooks, a project knowledge folder, decision logs, and git-backed backups.

Audience: people building with AI coding assistants and agents, including vibe coders, indie game developers, modders, and Discord bot makers.

## Tools

- [Brain File Generator](https://brainstack.pages.dev/generator/): Free in-browser form that outputs a ready rules file for Gemini (GEMINI.md), Claude Code (CLAUDE.md), AGENTS.md-compatible agents, Cursor (.cursor/rules/*.mdc), and GitHub Copilot (.github/copilot-instructions.md). Nothing is uploaded.

## Guides

- [What a brain file is (and why your AI keeps forgetting)](https://brainstack.pages.dev/guides/what-is-a-brain-file/): Why AI coding assistants forget your project between sessions, and how a short rules file like GEMINI.md, CLAUDE.md, or AGENTS.md fixes it.
- [Set up your AI for a vibe-coded web app in 10 minutes](https://brainstack.pages.dev/guides/vibe-coded-web-app-setup/): A step-by-step setup that keeps AI-built web apps on track: git, a one-paragraph pitch, pinned stack, commands, rules, security, and a first prompt that works.
- [Set up an AI agent for a Godot or Unity game project](https://brainstack.pages.dev/guides/game-dev-ai-setup-godot-unity/): How to stop AI assistants from mixing engine versions, breaking scenes, and guessing APIs in Godot and Unity projects, with a ready rules file and git setup.
- [Set up AI for a Discord bot project](https://brainstack.pages.dev/guides/discord-bot-ai-setup/): A rules file and setup that keep AI-written Discord bots on the current library version, handle tokens and intents safely, and get slash commands right.
- [Give your AI long-term memory (and back it up)](https://brainstack.pages.dev/guides/ai-long-term-memory-backup/): Go beyond one rules file: a project knowledge folder, decision log, session handoff notes, scoped rules, playbooks, and git-backed backups so your AI remembers for months.
- [GEMINI.md vs CLAUDE.md vs AGENTS.md vs Cursor rules vs Copilot instructions](https://brainstack.pages.dev/guides/ai-rules-file-formats/): Which rules file each AI coding tool reads, where to put it, and how to keep one source of truth when you use more than one tool.

## Optional

- [Full text of every guide](https://brainstack.pages.dev/llms-full.txt): All guides in one plain-text file.
- [Sponsor BrainStack](https://brainstack.pages.dev/sponsor/): Audience and sponsorship info.
- [Privacy](https://brainstack.pages.dev/privacy/): What data the site collects (only newsletter emails).