---
title: "copilot-instructions.md is a great entrypoint for AI coding assistants"
description: "Learn how copilot-instructions.md can dramatically improve your AI coding experience and why automating its creation is the future of development workflow."
canonical: "https://choy.in/blog/copilot-instructions-game-changer"
author: "Cho Yin Yong"
published: "2025-11-19"
last-updated: "2025-11-19"
category: "Vibecoding"
reading-time: "5 min read"
---

# copilot-instructions.md is a great entrypoint for AI coding assistants

> Learn how copilot-instructions.md can dramatically improve your AI coding experience and why automating its creation is the future of development workflow.

I spent the first week building a project yelling at my AI.

Okay, not literally yelling, but definitely aggressively typing. I kept finding myself repeating the same things: "My blog posts are written in markdown and do not generate HTML SEO tags", "Always use the container component when displaying text", etc.

It felt like onboarding a new intern every single session. The context window would reset. I was spending more time steering the AI than actually building.

Then I dropped a single file into my repo, and today, there's no more back-and-forth. The AI just does what I want.

## The "Magic" File

The file is `.github/copilot-instructions.md`.

I stumbled upon it while digging through documentation, and honestly, the concept was so simple - it just appends this file to the prompt every time the AI is called.

Here is the lesson I learned the hard way: **Manual first drafts are boring.**

If you try to write this file from memory, you'll stare at a blank cursor and wonder what's actually important. You'll miss the obvious things.

Instead, I let the tooling do the heavy lifting. Github Copilot on VSCode has a "Generate Instructions" feature in the settings. I hit that button, and it scanned my repo and spit out an outline.

|               Generate Instructions               |                  The Automatic Prompt                  |
| :-----------------------------------------------: | :----------------------------------------------------: |
| ![Generate Instructions Menu](https://choy.in/content/blog/copilot-tool.png) | ![Generate Instructions Process](https://choy.in/content/blog/copilot-prompt.png) |

The raw output was surprisingly good. It nailed the folder structure, the `package.json` scripts, and even some of the weird project quirks (like my starfield component).

Then, I just pruned the filler. I added my specific pet peeves ("do NOT edit ui components directly") and saved it. Ten minutes, tops.

![Generated Instructions Result](https://choy.in/content/blog/copilot-output.png)

I’ve made it a habit now:

1.  **Create it early.** Don't create it at the beginning, but after you first big feature.
2.  **Update it when the architecture changes.** If I switch routing libraries, I update the doc. (rather, ask the AI to)
3.  **Patch the blind spots.** If the AI keeps messing up a specific pattern, I add additional context to the file.

## Give It a Shot

If you're using Copilot, Cursor, or any modern AI coding tool, try this. Generate the file, trim the fat, and commit it.

It’s a five-minute investment that saves you a slow drip of correction for the rest of the project. And honestly? It’s just nice to not have to repeat yourself.