GitHub Copilot

The model read the rule. It moved on.

Instructions ask. Hooks enforce.

What you'll learn

Why an instruction can be weighed and dropped by the model
What a preToolUse hook is and where it runs
How to write a guard script that exits 1 to deny

copilot 9 steps 50 seconds March 19, 2026 —

Was this useful?

Share

Understand it one step at a time

The short runs these in order in about 50 seconds. Here they are written out — pick any step to jump the short straight to it.

1 Step 1 of 9

A tidy annotation

The agent adds a Flutter import to a domain entity to get @immutable.

Free app · no app store

These are built for a phone

Every short is drawn at full portrait height, the shape a phone already is. Installed, it opens full-bleed with no address bar across the top — and the whole library reads offline.

Read deeper on GitHub Copilot

Twenty seconds gets the shape of an idea across. These go into how it behaves in production.

GitHub Copilot Hooks for Beginners: Why You Need Them and What You Can Build

A beginner GitHub Copilot Hooks tutorial: what a hook is, why an AI agent needs deterministic guardrails, and how to write your first one in ten minutes.
Building a GitHub Copilot Security Agent for Legacy Systems (Honestly)

Learn what a GitHub Copilot security agent can find in a legacy system, what it can miss, and why scanners and people must still approve changes.
Making GitHub Copilot Understand a Legacy Codebase Nobody Documented

A repeatable method for legacy discovery: turning the business rules, workflows and history a codebase never documented into knowledge Copilot uses.

More shorts

GitHub Copilot

The 7 files Copilot reads

9 steps · 23s
GitHub Copilot

LLMs have no memory

9 steps · 28s
GitHub Copilot

Twenty messages. 91% of the month.

9 steps · 51s

New technical articles, Azure AI and GitHub Copilot updates, and upcoming events. No spam, unsubscribe anytime.