1# Extensions
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 3Zed lets you add new functionality using user-defined extensions.
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 5- [Installing Extensions](./extensions/installing-extensions.md)
 6- [Developing Extensions](./extensions/developing-extensions.md)
 7  - [Developing Language Extensions](./extensions/languages.md)
 8  - [Developing Debugger Extensions](./extensions/debugger-extensions.md)
 9  - [Developing Themes](./extensions/themes.md)
10  - [Developing Icon Themes](./extensions/icon-themes.md)
11  - [Developing Slash Commands](./extensions/slash-commands.md)
12  - [Developing Agent Servers](./extensions/agent-servers.md)
13  - [Developing MCP Servers](./extensions/mcp-extensions.md)