actions Slash commands are shortcuts that can be activated by typing ’/’ in a chat session (press cmd/ctrl + L (VS Code) or cmd/ctrl + J (JetBrains)), and selecting from the dropdown. slash-commands Slash commands can be combined with additional instructions, including context providers or highlighted code.
Recommended approach: Use prompt files to create slash commands instead of the deprecated config.json approach. The methods described below provide better flexibility and are the actively maintained ways to add custom commands.

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Prompts

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Assistant prompt blocks

The easiest way to add a slash command is by adding prompt blocks to your assistant, which show up as slash commands in Chat.

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Prompt files

It is also possible to write your own slash command by defining a “.prompt file.” Prompt files can be as simple as a text file, but also include templating so that you can refer to files, URLs, highlighted code, and more. Learn more about prompt files here.

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MCP Server prompts

Any prompts provided by Model Context Protocol servers are also accessible in chat as Slash Commands. See the MCP Server Deep Dive for more details.