// free guides + generator for AI builders
Give your AI a brain.
Your AI forgets your project every time you open a new chat. Brainstack shows you how to fix that with a brain file, project memory, and backups, so your AI codes like it has been on the team for months.
Why your AI keeps messing up
It forgets
Every new session starts from zero. Your stack, your rules, and last week's decisions are gone unless they live in a file the AI reads.
It guesses
Without versions and conventions it fills the gaps with whatever it saw most in training: the wrong framework, old syntax, surprise dependencies.
It's risky
No security rules means keys in commits and the whole project folder getting deployed. A few lines of rules prevent most of it.
Set it up in three steps
Generate
Fill a short form in the generator. Get a rules file for Gemini, Claude, Cursor, Copilot, or any AGENTS.md agent.
Drop it in
Save it in your project root (or the folder your tool expects). Your AI reads it at the start of every session.
Let it learn
Add a notes folder, a decision log, and git backups so the brain grows with the project. Here's how.
Guides
6 free, practical guides. No fluff, copy-paste templates included.
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Start here · 7 min
What a brain file is (and why your AI keeps forgetting)
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.
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Beginner · 10 min
Set up your AI for a vibe-coded web app in 10 minutes
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.
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Intermediate · 9 min
Set up an AI agent for a Godot or Unity game project
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.
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Beginner · 8 min
Set up AI for a Discord bot project
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.
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Intermediate · 11 min
Give your AI long-term memory (and back it up)
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.
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Reference · 8 min
GEMINI.md vs CLAUDE.md vs AGENTS.md vs Cursor rules vs Copilot instructions
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.
Read guide →