---
title: "Building Better Apps with GitHub Copilot Custom Agents"
url: https://daily.dev/posts/building-better-apps-with-github-copilot-custom-agents-nkclgrhjt
source_url: https://montemagno.com/building-better-apps-with-github-copilot-custom-agents/
type: article
source: "James Montemagno"
published: 2025-11-09T08:24:40.941Z
updated: 2025-11-09T08:25:03.202Z
tags: ["github", ".net", "c#", "ai-assisted-development"]
reading_time: 13
upvotes: 2
comments: 0
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
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# Building Better Apps with GitHub Copilot Custom Agents

**[James Montemagno](https://daily.dev/sources/montemagno)** · 13 min read · 2 upvotes · 0 comments

## Summary

GitHub Copilot's custom agents feature allows developers to create specialized AI assistants tailored to specific frameworks and coding conventions. The author demonstrates this by comparing two implementations of the same feature: one using standard Copilot and another using a WinForms Expert custom agent. The specialized agent produced significantly better code with proper layout patterns, modern C# features, comprehensive validation, and framework-specific best practices. Custom agents are defined using simple Markdown files placed in `.github/agents/` and can be used across GitHub.com, VS Code, and CLI. The article includes detailed code comparisons showing improvements in UI organization, settings migration, validation logic, and overall architecture.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://montemagno.com/building-better-apps-with-github-copilot-custom-agents/>

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Tags: [#github](https://daily.dev/tags/github), [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#ai-assisted-development](https://daily.dev/tags/ai-assisted-development)

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