Manage AI Instructions Like Files — A VS Code + CLAUDE.md Guide for Non-Developers

If you've set up custom instructions in Claude, ChatGPT, or Grok, you've probably noticed a limitation. As your instructions grow longer, they get harder to manage — and separating rules for different projects becomes a mess inside a single text box.

There's a better way. You can manage AI instructions as text files in VS Code. It's what developers do, but you don't need to write a single line of code.

Where Web-Based Instructions Fall Short

In the previous post, we covered how to set up custom instructions on Claude, ChatGPT, and Grok. Those features are a great starting point, but real-world use reveals three walls.

First, everything goes in one box. Writing style, formatting rules, constraints, and reference info all cramped into a single text field. It gets messy fast.

Second, there's no edit history. "What did I change last week?" — you can't go back and check.

Third, sharing is copy-paste only. Sending your instructions to a teammate means manually copying text.

Managing instructions as files solves all three.

What Is VS Code and Why Use It

VS Code (Visual Studio Code) is a free text editor made by Microsoft. Developers use it for writing code, but at its core, it's an advanced notepad.

Three reasons to use VS Code for AI instructions:

• Folders and files — organize instructions by topic instead of cramming them into one box
• Built-in AI tools — Claude Code, Cursor, and GitHub Copilot read these files directly
• Edit history — with Git, you can track every change automatically

You don't need to write code. Create text files, put them in folders, and let AI read them. That's it.

What Is CLAUDE.md

CLAUDE.md is a text file that tells AI your project's rules. It's a Markdown file (.md extension) placed at the top of your project folder.

It holds the same content you'd put in web-based instructions, but as a file, it can be structured.

Web instructions (everything in one box):

I'm a project manager. Use formal tone. Use tables. Always include units for numbers. Spell out abbreviations on first use...

File instructions (structured):

project-folder/
├── CLAUDE.md              ← core rules (keep it short)
└── docs/
    ├── writing-rules.md   ← style and format details
    ├── seo-guide.md       ← SEO-specific rules
    └── translation-guide.md ← translation rules

Core rules go in CLAUDE.md. Detailed rules go in separate files inside a docs folder. The AI references each file as needed.

Step-by-Step Setup

Step 1 — Install VS Code

Download it free from code.visualstudio.com. Available for Windows, Mac, and Linux.

Step 2 — Create a Project Folder

Create a folder anywhere on your computer. Name it whatever you want (e.g., my-ai-rules).

In VS Code, go to "File → Open Folder" and select it.

Step 3 — Create CLAUDE.md

Click the "New File" icon in the VS Code sidebar. Name it CLAUDE.md.

Paste the following and customize it:

# Project Instructions

I am a project manager at a tech company. This project produces weekly reports, planning documents, and meeting notes.

## Core Rules

1. Use professional tone
2. Lead with the conclusion, then supporting evidence
3. Always include units and sources for numbers
4. Minimize speculative language

## Detailed Guidelines

File	Content
docs/writing-rules.md	Style and format rules
docs/report-template.md	Weekly report template

Step 4 — Create Detail Files

Create a docs folder and add writing-rules.md inside it:

# Writing Rules

## Basics

• Keep sentences under 20 words
• Avoid filler phrases ("in order to," "it should be noted that")
• Spell out abbreviations on first use

## Don'ts

• No hedge phrases ("it might be possible that")
• No emojis
• No introductions longer than two sentences

As your rules grow, they stay organized because each topic has its own file.

Step 5 — Feed It to AI

There are several ways to get these files to your AI:

Option A: Copy to web

Copy your CLAUDE.md content and paste it into Claude Project Instructions or ChatGPT Custom Instructions. You edit in VS Code, use in the browser — this way your edit history stays local.

Option B: Use an AI coding tool

Install Claude Code, Cursor, or GitHub Copilot in VS Code. These tools read CLAUDE.md automatically. No copy-pasting needed. This is the most powerful approach, but requires learning an AI coding tool.

Option C: Upload files

Upload your CLAUDE.md and docs files directly to Claude Projects or ChatGPT GPTs. The AI will reference them in conversations.

Real Benefits of File-Based Management

Edit History

"I changed the report format last month — what was the old version?" With files, you can look back. Git tracks changes automatically. Even without Git, you can save dated backups manually.

Team Sharing

Put your instruction files on GitHub and everyone on your team uses the same rules. When someone updates a rule, it applies to everyone. A different world from copy-pasting instructions over chat.

Gradual Growth

Start with a single CLAUDE.md. As rules accumulate, add files to the docs folder. Multiple projects get their own folders. The structure grows naturally.

Web Instructions vs File Instructions

Feature	Web Instructions	File (VS Code) Instructions
Getting started	Easy (just type)	Light setup needed
Organization	Single text box	Files and folders
Edit history	None	Git or manual backups
Team sharing	Copy-paste	GitHub or shared repo
AI tool integration	Manual paste	Auto-detected (Claude Code, etc.)
Best for	Beginners, light use	Users with complex instructions

Wrapping Up

If you're comfortable with web-based AI instructions, you're ready for the file-based approach.

VS Code is free. CLAUDE.md is just a text file. You don't need to know how to code — creating folders and organizing text files is all it takes to manage AI instructions systematically.

Start with one file. Add more when you need them. Don't overthink it — at the end of the day, it's just a well-organized notepad.