AGENTS.md & GitHub Copilot

Giving AI coding agents the context they need: custom instructions, AGENTS.md, Copilot Skills, hooks, code review, and the token budget behind it all.

13 parts · about 205 minutes end to end · updated June 3, 2026

Read it in order

1. 1
   What Is GitHub Copilot Custom Instructions? (And Why Your Project Needs One)

   GitHub Copilot custom instructions explained with a real Flutter app you can clone: what the file is, why every project needs one, and beginner mistakes.

   May 1, 2026 · 16 min read

2. 2
   AGENTS.md in 2026: The One File Every AI-Assisted Developer Actually Needs

   AI agents write more code each month than teams can review by hand. AGENTS.md is the one file that keeps it consistent — solo, team or enterprise.

   May 2, 2026 · 10 min read

3. 3
   The Complete AGENTS.md Playbook: Build AI Coding Agents That Work Like Your Best Engineer

   What belongs in an AGENTS.md file — architecture, security, testing, AI rules — plus what to leave out, common mistakes and a reusable template.

   May 3, 2026 · 18 min read

4. 4
   GitHub Copilot Skills Deep Dive: The Missing Layer Between Prompts, Instructions, and Agents

   GitHub Copilot Skills explained by an architect — what they are, how they differ from prompts and instructions, and how to build reusable Skills for teams.

   May 15, 2026 · 19 min read

5. 5
   Building Your First GitHub Copilot Skill: A .NET Clean Architecture SKILL.md, Start to Finish

   A build-along for .NET developers — create one GitHub Copilot Skill (SKILL.md) that enforces Clean Architecture, CQRS and your API contract.

   May 17, 2026 · 16 min read

6. 6
   Building a Flutter Copilot Skill: Clean Architecture with BLoC and Firebase, Start to Finish

   Build one GitHub Copilot Skill (SKILL.md) so Copilot writes Flutter the way your app does — layered folders, BLoC state, Firebase behind a repository.

   May 19, 2026 · 21 min read

7. 7
   Building an Azure Copilot Skill: Secure, Cost-Aware Cloud Baselines with Bicep, Start to Finish

   Build one GitHub Copilot Skill (SKILL.md) that guards your Azure Bicep — Managed Identity, private networking and cost tiers Copilot will not violate.

   May 21, 2026 · 19 min read

8. 8
   GitHub Copilot Can't Replace Your Code Reviewer — Here's What It Can Actually Automate

   A software architect on GitHub Copilot code review — build a Skill that automates the mechanical layer, and the limits that keep a human in the loop.

   May 23, 2026 · 16 min read

9. 9
   GitHub Copilot PR Summary: How to Get Descriptions Reviewers Actually Read

   The GitHub Copilot PR summary: why an auto-generated description that restates the diff is noise, and how to get one reviewers actually read.

   May 25, 2026 · 16 min read

10. 10
    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.

    May 29, 2026 · 17 min read

11. 11
    What Is an AI Token? Why Every AI Cost Is Calculated in Them

    Tokens are not words, and they are not characters. Here is what a token really is, why AI billing counts them, and how to work out the cost of a request.

    June 3, 2026 · 11 min read

12. 12
    400K AI Tokens a Month: My Daily GitHub Copilot Workflow That Makes the Budget Last

    A 400K monthly AI token budget sounds generous until agent mode eats it in a week. Here is the daily Copilot workflow I use to make it last the month.

    May 30, 2026 · 14 min read

13. 13
    How to Save AI Tokens: 15 Habits That Cut My Copilot Context Waste

    Fifteen tested habits that cut my monthly AI token usage without cutting how much I use AI, from context discipline to knowing when to restart a chat.

    June 1, 2026 · 10 min read