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Markdown is a lightweight language for formatting plain text. You can use Markdown syntax, along with some additional HTML tags, to format your writing on GitHub. You can do this in repository READMEs, issue and pull request descriptions, and comments on issues and pull requests. Markdown gives you the ability to create clear, readable documentation. Having a clean README in your project or a well-formatted issue can make a huge difference when someone lands on your content for the first time. And one of the best parts is that when you get the syntax down, you’ll find yourself using it in almo

The most common place where you’ll encounter Markdown is in your repository’s README file. But you’ll also find yourself using it in issues, pull requests, discussions, and even wikis. Any time you write or communicate on GitHub, Markdown is behind the scenes, helping your text look clean and consistent. Markdown extends beyond GitHub to modern note-taking apps, blog platforms, and documentation tools. It’s a widely adopted language used across the technical space, so learning how to use it can benefit you beyond just how you interact with GitHub.

You now know the basics of Markdown, including what it is, why it matters, where you can use it, and how to start writing it with confidence. With just a few techniques, you can create clean, readable documentation that makes your GitHub projects stand out. Whether you’re building a README, opening an issue, or writing project notes, Markdown is going to be one of the tools you use the most. If you want to learn more about Markdown, here are some good places to get started: Basic formatting syntax Creating and highlighting code blocks Quickstart for writing at GitHub Happy coding! Written by

A custom agent is a Copilot agent that can be defined using a Markdown file. Instead of relying on generic behavior, you describe how the agent should operate, what tools it can use, what standards it should follow, and what outputs it should produce. The result: its behavior is consistent wherever it runs. Each coding agent you create can act as a specialized agent tailored for a specific task. For example, a generic coding agent might suggest how to clean up your code. But a custom agent can apply your formatting rules, tooling, accessibility standards, review requirements, and safety requir