# Markdown

Concept · [Technical basics](https://ecosystem.samcarlton.com/technical)

Also called: md, .md, markdown file, markdown files, mark down

A simple way to format plain text with symbols, such as # for a heading and \* for a bullet. It is easy for people to read and for software and AI tools to process, so it is a common format for notes, documentation and AI [instructions](https://ecosystem.samcarlton.com/prompt).

**For example:** A [founder](https://ecosystem.samcarlton.com/founder) writes product notes in Markdown, and the same file reads cleanly in a [text editor](https://ecosystem.samcarlton.com/code-editor), on [GitHub](https://ecosystem.samcarlton.com/github) and when pasted into an AI chat.

## Connects to (5)

- [HTML](https://ecosystem.samcarlton.com/html): HyperText Markup Language.
- [Prompt](https://ecosystem.samcarlton.com/prompt): The instructions or question you give an AI tool in everyday words.
- [Agent skills](https://ecosystem.samcarlton.com/agent-skills): A packaged set of instructions, sometimes with scripts, that an agent loads when a task calls for it, such as how to write a press release…
- [Repository](https://ecosystem.samcarlton.com/repository): The folder where a project's code lives, together with the full history of every change made to it.
- [JSONC](https://ecosystem.samcarlton.com/jsonc): JSON with comments.

Map view: https://ecosystem.samcarlton.com/markdown